John deere 4300 compact utility tractor service repair manual
- 1. TECHNICAL MANUAL Litho in U.S.A John Deere Lawn & Grounds Care Division 4200, 4300 and 4400 Compact Utility Tractors TM1677 (Apr01) Replaces TM1677 (Jul99)
- 2. 4200 Tractor 4300 Tractor 4400 Tractor M91749 M91750 M91814
- 3. INTRODUCTION 4/6/01 1 - 1 This technical manual is written for an experienced technician and contains sections that are specifically for this product. It is a part of a total product support program. The manual is organized so that all the information on a particular system is kept together. The order of grouping is as follows: • Table of Contents • Specifications • Component Location • System Schematic • Theory of Operation • Troubleshooting Chart • Diagnostics • Tests & Adjustments • Repair Note: Depending on the particular section or system being covered, not all of the above groups may be used. Each section will be identified with a symbol rather than a number. The groups and pages within a section will be consecutively numbered. We appreciate your input on this manual. To help, there are postage paid post cards included at the back. If you find any errors or want to comment on the layout of the manual please fill out one of the cards and mail it back to us. All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice. COPYRIGHT© 2001 Deere & Co. John Deere Worldwide Commercial and Consumer Equipment Division Horicon, WI All rights reserved Previous Versions 1998 Information Specifications and Electrical Steering Brakes Hydraulics Diesel Engine Safety Gear Power Train Hydrostatic Power Train Miscellaneous SyncReverser™ Power Train Final Drive Power Train
- 4. SAFETY 1 - 2 4/6/01 SAFETY RECOGNIZE SAFETY INFORMATION This is the safety-alert symbol. When you see this symbol on your machine or in this manual, be alert to the potential for personal injury. Follow recommended precautions and safe servicing practices. Understand Signal Words A signal word—DANGER, WARNING, or CAUTION— is used with the safety-alert symbol. DANGER identifies the most serious hazards. DANGER or WARNING safety signs are located near specific hazards. General precautions are listed on CAUTION safety signs. CAUTION also calls attention to safety messages in this manual. REPLACE SAFETY SIGNS Replace missing or damaged safety signs. See the machine operator’s manual for correct safety sign placement. HANDLE FLUIDS SAFELY-AVOID FIRES Be Prepared For Emergencies When you work around fuel, do not smoke or work near heaters or other fire hazards. Store flammable fluids away from fire hazards. Do not incinerate or puncture pressurized containers. Make sure machine is clean of trash, grease, and debris. Do not store oily rags; they can ignite and burn spontaneously. Be prepared if a fire starts. Keep a first aid kit and fire extinguisher handy. Keep emergency numbers for doctors, ambulance service, hospital, and fire department near your telephone.
- 5. SAFETY 4/6/01 1 - 3 USE CARE IN HANDLING AND SERVICING BATTERIES Prevent Battery Explosions • Keep sparks, lighted matches, and open flame away from the top of battery. Battery gas can explode. • Never check battery charge by placing a metal object across the posts. Use a volt-meter or hydrometer. • Do not charge a frozen battery; it may explode. Warm battery to 16°C (60°F). Prevent Acid Burns • Sulfuric acid in battery electrolyte is poisonous. It is strong enough to burn skin, eat holes in clothing, and cause blindness if splashed into eyes. • Avoid acid burns by: 1. Filling batteries in a well-ventilated area. 2. Wearing eye protection and rubber gloves. 3. Avoiding breathing fumes when electrolyte is added. 4. Avoiding spilling or dripping electrolyte. 5. Use proper jump start procedure. • If you spill acid on yourself: 1. Flush your skin with water. 2. Apply baking soda or lime to help neutralize the acid. 3. Flush your eyes with water for 10 – 15 minutes. 4. Get medical attention immediately. • If acid is swallowed: 1. Drink large amounts of water or milk. 2. Then drink milk of magnesia, beaten eggs, or vegetable oil. 3. Get medical attention immediately. USE CARE AROUND HIGH- PRESSURE FLUID LINES Avoid High-pressure Fluids Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid injury from escaping fluid under pressure by stopping the engine and relieving pressure in the system before disconnecting or connecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids. If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Such information is available from Deere & Company Medical Department in Moline, Illinois, U.S.A. Avoid Heating Near Pressurized Fluid Lines Flammable spray can be generated by heating near pressurized fluid lines, resulting in severe burns to yourself and bystanders. Do not heat by welding, soldering, or using a torch near pressurized fluid lines or other flammable materials. Pressurized lines can be accidentally cut when heat goes beyond the immediate flame area.
- 6. SAFETY 1 - 4 4/6/01 USE SAFE SERVICE PROCEDURES Wear Protective Clothing Wear close fitting clothing and safety equipment appropriate to the job. Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. Operating equipment safely requires the full attention of the operator. Do not wear radio or music headphones while operating machine. Service Machines Safely Tie long hair behind your head. Do not wear a necktie, scarf, loose clothing, or necklace when you work near machine tools or moving parts. If these items were to get caught, severe injury could result. Remove rings and other jewelry to prevent electrical shorts and entanglement in moving parts. Use Proper Tools Use tools appropriate to the work. Makeshift tools and procedures can create safety hazards. Use power tools only to loosen threaded parts and fasteners. For loosening and tightening hardware, use the correct size tools. DO NOT use U.S. measurement tools on metric fasteners. Avoid bodily injury caused by slipping wrenches. Use only service parts meeting John Deere specifications. Park Machine Safely Before working on the machine: 1. Lower all equipment to the ground. 2. Stop the engine and remove the key. 3. Disconnect the battery ground strap. 4. Hang a “DO NOT OPERATE” tag in operator station. Support Machine Properly And Use Proper Lifting Equipment If you must work on a lifted machine or attachment, securely support the machine or attachment. Do not support the machine on cinder blocks, hollow tiles, or props that may crumble under continuous load. Do not work under a machine that is supported solely by a jack. Follow recommended procedures in this manual. Lifting heavy components incorrectly can cause severe injury or machine damage. Follow recommended procedure for removal and installation of components in the manual. Work In Clean Area Before starting a job: 1. Clean work area and machine. 2. Make sure you have all necessary tools to do your job. 3. Have the right parts on hand. 4. Read all instructions thoroughly; do not attempt shortcuts.
- 7. Page DIESEL ENGINE CONTENTS CONTENTS 4/6/01 3 - 1 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 GENERAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 REPAIR SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 TESTS AND ADJUSTMENT SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 OPERATIONAL TESTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 TORQUE VALUES, NON-STANDARD FASTENERS . . . . . . . . . . . . . . . . . . . . . . . . . 9 SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 OTHER MATERIALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 FUEL AND AIR SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 COOLING SYSTEM OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 LUBRICATION SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 TROUBLESHOOTING CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 ENGINE SYSTEM DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 TESTS AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 CYLINDER COMPRESSION TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 SLOW IDLE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 VALVE CLEARANCE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 CONNECTING ROD SIDE PLAY CHECK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 CONNECTING ROD BEARING CLEARANCE CHECK . . . . . . . . . . . . . . . . . . . . . . 19 CRANKSHAFT END PLAY CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 CRANKSHAFT MAIN BEARING CLEARANCE CHECK. . . . . . . . . . . . . . . . . . . . . . 20 VALVE LIFT CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 CAMSHAFT END PLAY CHECK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 TIMING GEAR BACKLASH CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 FUEL INJECTION NOZZLE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 THERMOSTAT OPENING TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 INJECTION PUMP STATIC TIMING ADJUSTMENT (NON-EPA ENGINES) . . . . . . 24 INJECTION PUMP TIMING ADJUSTMENT (EPA ENGINES) . . . . . . . . . . . . . . . . . 26 FAN/ALTERNATOR DRIVE BELT ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . 26 RADIATOR BUBBLE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 COOLING SYSTEM PRESSURE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 RADIATOR CAP PRESSURE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ENGINE OIL PRESSURE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 FUEL TRANSFER PUMP TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 FUEL SYSTEM LEAKAGE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 BLEED FUEL SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ENGINE REPAIR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ENGINE REMOVAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ROCKER COVER REMOVAL/INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ROCKER ARM ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 CYLINDER HEAD AND VALVES REMOVAL AND INSTALLATION . . . . . . . . . . . . . 34 CYLINDER HEAD AND VALVES DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . 35
- 8. 3 - 10 4/6/01 THEORY OF OPERATION DIESEL ENGINE THEORY OF OPERATION FUEL AND AIR SYSTEM OPERATION Function: Fuel system supplies fuel to injection nozzles. The air intake system filters and supplies air needed for combustion. Theory of Operation: Fuel System: A mechanical fuel transfer pump (A) draws fuel from the tank outlet. The low pressure fuel from the fuel pump flows through the filter/water separator (B) to the fuel the injector pump inlet (C). The injection pump then directs high pressure fuel through the injector lines (D) for combustion. Excess fuel is returned, along with fuel from the injectors, through the return line (E) to the fuel tank. If the unit runs out of fuel, there are two air bleed lines that allow air to escape from the top of the filter and the injection pump. These two lines allow the system to be self bleeding. The engine speed is controlled by the throttle lever and rod. The rod is connected to the injection pump governor control lever. The fuel shutoff solenoid controls the injection pump shutoff shaft. When the solenoid is retracted (key in the START or ON position), the engine can be started. When the key is turned off, return springs on the shutoff shaft, extend the solenoid, moving the shutoff linkage to the shutoff position. The solenoid also closes if the tractor is operated in an unsafe condition. (See “ENGINE SHUTOFF CIRCUIT OPERATION” in the Electrical section.) The injection pump meters fuel as determined by the governor and delivers it at high pressure to the injection nozzles. The injection nozzle prevents flow until high pressure is reached, opening the valve and spraying atomized fuel into the combustion chamber. Injection lines contain trapped fuel whenever injection is not taking place. A small amount of fuel leaks past the nozzle valve to lubricate the fuel injection nozzle. This leakage combines with excess fuel from the injection pump and is returned to tank. Any air in the fuel system is bled out with return fuel to the fuel tank. A fuel level sensor mounted in the fuel tank informs the operator of the fuel level. Air Intake System: Engine intake air enters the inlet hose (A) behind the grille, and flows into the air filter body (B). The air cleaner also has a rubber, one way, unloading valve (C), that ejects heavy dirt particles from the air stream during engine operation before they reach the filters. The operator can squeeze the valve to remove the large particles. The air cleaner elements filter the air, which then flows through hose (D) to the intake manifold. An air filter restriction indicator (E) at the rear of the air cleaner informs the operator when the air filter needs servicing. M94772 A B C D E
- 9. 4/6/01 3 - 11 DIESEL ENGINE COOLING SYSTEM OPERATION COOLING SYSTEM OPERATION Function: The coolant pump (A) circulates coolant through the cooling system, drawing hot coolant from the engine block, circulating it through the radiator for cooling. Theory of Operation: The pressurized cooling system includes the radiator, water pump, fan and thermostat (B). During the warm-up period, the thermostat remains closed and the impeller type coolant pump draws coolant from the bypass tube. Coolant from the pump flows to the cylinder block water jacket and up through the cylinder head providing a fast warm-up. Once the engine has reached operating temperature, the thermostat opens and coolant is pumped from the bottom of the radiator via the lower radiator hose into the cylinder block. Here it circulates through the block and around the cylinders. From the block, coolant is then directed through the cylinder head, and into thermostat housing. With the thermostat open, warm engine coolant passes through the housing into the top of the radiator where it is circulated to dissipate heat. When coolant system pressure exceeds 48 kPa (7 psi), a valve in the radiator cap opens to allow coolant to discharge into the coolant recovery tank. When temperature is reduced, a vacuum is produced in the radiator and coolant is drawn back out of the coolant recovery tank through a valve in the radiator cap. A coolant temperature sensor (C) informs the operator of the engine coolant temperature and warns of a high temperature condition by lighting a lamp. Start To Open . . . . . . . . .69.5 - 72.5° C (157 - 163° F) Fully Opened . . . . . . . . . . . . . . . . . . . . 85° C (185° F) A B C MX1026
- 10. 3 - 12 4/6/01 LUBRICATION SYSTEM OPERATION DIESEL ENGINE LUBRICATION SYSTEM OPERATION Function: A full pressure system lubricates engine parts with filtered oil. Theory of Operation: The pressure lubrication system consists of a positive displacement gear-driven pump (F), oil strainer (G), full flow oil filter (J), oil pressure regulating valve and an electrical pressure warning switch. (K) The pump draws lubrication oil from the oil pan through a strainer and a suction tube. The oil is then pumped through an oil passage to the oil filter and through the engine block main oil galley (L). From the main oil galley, oil is forwarded under pressure to the crankshaft main bearing journals (C) and idler gear bushing (E). Drilled cross-passages in the crankshaft (I) distribute the oil from the main bearings to connecting rod bearings. Lube oil holes in main bearing oil grooves direct oil to the camshaft bearings (D). A drilled passage from the rear camshaft bearing through the cylinder block and cylinder head supplies lubricating oil to the rocker arm shaft (B). The hollow shaft distributes oil to the rocker arms (A), cam followers and valves. Lubrication oil is supplied to the fuel injection pump (H) from the main oil galley through external oil lines. An oil pressure sensor (K) activates an indicator light to alert the operator to shut down the engine if oil pressure drops below specification. OIL FILTER IDLER GEAR BUSHING OIL PUMP INTAKE SCREEN INJECTION PUMP RESERVOIR MAIN OIL GALLEY OIL PRESSURE SENSOR ROCKER ARM SHAFT CAMSHAFT BEARINGS ROCKER ARMS PUMP PRESSURE OIL PRESSURE FREE OIL CONNECTING ROD JOURNAL CRANKSHAFT MAIN BEARINGS C B A D E F G I H J K L
- 11. 4/6/01 3 - 15 DIESEL ENGINE ENGINE SYSTEM DIAGNOSIS ENGINE SYSTEM DIAGNOSIS Test Conditions: • Machine parked on level surface. • Park brake engaged. • Key switch in OFF position unless indicated otherwise. Test Location Normal If Not Normal 1. Engine dipstick and exterior engine surface. Oil level is between “L” and “H” marks. Oil filter clean. Fill oil to correct level. Change oil and filter. Oil is not burnt, or contaminated with metal particles, fuel, or coolant. Change oil and filter. Inspect for source of contamination. No external leakage. Check gaskets, seals, plugs, cylinder head, block, intake manifold and breather. 2. Coolant tank and radiator. Coolant level is between marks on tank when engine is warm. Coolant in radiator is full to top. Add proper coolant. Coolant is not contaminated with oil, fuel or discolored brown. Drain and flush system. Check for source of contamination. Radiator screen free of debris. Clean or replace. Water pump not leaking. Inspect water pump. Hoses not cracked or leaking. Pressure test radiator and cap. Clamps and radiator cap tight. Tighten cap and clamps. Fan belt tight, not glazed or cracked. Replace belt and adjust tension. Fan blades not damaged or warped. Replace fan. 3. Fuel tank, pump, lines, filter shutoff valve. Fuel level correct, not contaminated. Correct grade of fuel, no water in fuel. Drain and clean fuel tank. Add fresh fuel. Fuel pump in-line filter free of debris. Replace filters. Fuel shutoff valve in “ON” position. Move to “ON” position. Fuel hoses not cracked or leaking. Replace. Fuel hose clamps tight. Replace or tighten. 4. Air filter and air intake. Air filter hose not cracked, clamps tight. Element not plugged. Air filter housing sealed, no dirt tracking inside filter element. Replace and tighten clamps. Replace element or housing. 5. Fuel shutoff solenoid. (Key in RUN position.) Fuel shutoff solenoid must pull in and stay in. Solenoid must bottom out. Shutoff shaft must still move slightly. Clean any dirt from under solenoid boot. If solenoid will not pull in and hold in, See “Fuel Shutoff Solenoid Circuit Diagnosis” in ELECTRICAL section.
- 12. 3 - 16 4/6/01 TESTS AND ADJUSTMENTS DIESEL ENGINE TESTS AND ADJUSTMENTS CYLINDER COMPRESSION TEST Reason: To determine the condition of the pistons, rings, cylinder walls and valves. Equipment: • JT01682 Compression Gauge Assembly • JDG560 Adapter Procedure: 1. Remove the injection nozzles. 2. Install the heat protector from end of injector and install JDG560 adapter (A). 3. Install JT01682 Compression Gauge Assembly (B) and JDG560 Adapter. 4. Disconnect the fuel control solenoid connector. IMPORTANT: DO NOT overheat starting motor during test. 5. Crank the engine for five seconds with the starting motor. Minimum cranking speed is 250 rpm. 6. Record the pressure reading for each cylinder. Specifications: Cylinder Compression Pressure 4200 . . . . . . . . . . . . . . 3138 ± 98 kPa (455 ± 14 psi) 4200 (Minimum) . . . . 2555 ± 98 kPa (370 ± 14 psi) 4300 . . . . . . . . . . . . . . 3236 ± 98 kPa (469 ± 14 psi) 4300 (Minimum) . . . . 2550 ± 98 kPa (370 ± 14 psi) 4400 . . . . . . . . . . . . . . 3432 ± 98 kPa (498 ± 14 psi) 4400 (Minimum) . . . . 2746 ± 98 kPa (398 ± 14 psi) Difference Between Cylinders (max- All). . . . . . . . . . . . . 245 ± 49 kPa (36 ± 7 psi) Results: • If the pressure reading is below specification, squirt clean engine oil into the cylinders through the injector ports and repeat the test. • If the pressure increases significantly, check piston, rings, and cylinder walls for wear or damage. • If the pressure does not increase significantly, check for leaking valves, valve seats or cylinder head gasket. SLOW IDLE ADJUSTMENT IMPORTANT: The slow idle adjustment is the only adjustment that can be made on this engine. The fast idle and torque capsule adjustments are pre-set by the engine manufacturer to comply with strict EPA/CARB emissions requirements, and are adjustable ONLY by authorized diesel service facilities. Reason: To achieve proper slow idle rpm setting. Provides adequate rpm to keep the engine running smoothly without stalling. Equipment: • JT05719 Hand Held Digital Tachometer NOTE: Make sure the air cleaner is clean and not restricted. Replace the air cleaner element as necessary. Procedure: 1. Place a small piece of reflective tape on the crankshaft pulley. 2. Start the engine and run for 5 minutes to attain operating temperature. 3. Move the throttle lever to slow idle position. 4. Use JT05719 Hand Held Digital Tachometer to check engine speed at the crankshaft pulley. 5. Visually check that the injection pump throttle lever is against slow idle stop screw. Slow idle speed is set to specification. Specification: CST and SRT Tractors . . . . . . . . . . . . . 950 ± 50 rpm HST Tractors. . . . . . . . . . . . . . . . . . . . 1000 ± 50 rpm T6333EU A B
- 13. 4/6/01 3 - 17 DIESEL ENGINE VALVE CLEARANCE ADJUSTMENT Results: • If the slow idle rpm is not according to specifications, loosen the nut (A) and turn the slow idle stop screw (B) clockwise to increase the engine speed, or counterclockwise to decrease the engine speed until the slow idle speed is correct. After adjustment, tighten the nut. VALVE CLEARANCE ADJUSTMENT Reason: To be sure the valves are fully opening and closing at the correct time, and not wearing the valve train unnecessarily. Equipment: • Feeler Gauge • 10 mm End Wrench • Flat Blade Screwdriver • 17 mm Wrench Procedure: 1. The engine must be cool (room temperature) before the valve clearance is checked. 2. Be sure ignition key is OFF before attempting to turn engine by hand. 3. Open the hood and remove the engine side covers. 4. Remove the rocker arm cover. (See “ROCKER ARM COVER REMOVAL AND INSTALLATION”). 5. Locate the inspection hole in right side of the transmission tunnel. The flywheel can be seen inside the inspection hole. NOTE: “Top Dead Center (TDC)” is when the piston is at it’s highest point of travel in the cylinder on the compression stroke. Number one cylinder is located at rear of engine (flywheel side). 6. Turn the crankshaft pulley while watching the flywheel inside the inspection hole. Align the number one TDC mark (A) on the flywheel with the pointer on the tunnel. NOTE: When top dead center is reached, the rocker arms for that cylinder will be motionless as the crankshaft is rotated. If rocker arms are still moving when TDC is approached, rotate crankshaft one full revolution and try again. 7. Try to move rocker arms and/or push rods for No. 1 cylinder: • If the rocker arms and push rods are loose, the piston is at TDC on the compression stroke. Go to step 8. • If the rocker arms and/or push rods are not loose, rotate the flywheel one revolution (360°), and recheck the rocker arms and push rods. M91893 A B 1 12° BTDC 14° BTDC Direction of Engine Rotation Flywheel Timing Marks Center Line A
- 14. 3 - 18 4/6/01 CONNECTING ROD SIDE PLAY CHECK DIESEL ENGINE 8. Slide a feeler gauge between the valve cap (A) and rocker arm to measure the clearance. 9. To adjust the valves, loosen the lock nut (B) and turn the adjusting screw (C) until the blade of the feeler gauge can be inserted between the rocker arm and valve cap. Hold the adjusting screw while tightening the lock nut. 10. Recheck the valve clearance after tightening the lock nut. Specification: Valve Clearance . 0.15 – 0.25 mm (0.006 – 0.010 in.) 11. Check that the valve cap on the valve stem remained seated on the valve and inside the valve spring retainer. 12. Turn the crankshaft pulley counter clockwise (as viewed from operator’s seat or flywheel end) approximately 2/3 of a revolution (240°) while watching the observation hole for the number three timing mark. 13. Check that the rocker arms and push rods for cylinder number three are loose. 14. Repeat steps 7 – 13 for number three cylinder. 15. Repeat steps 7 – 11 for number two cylinder. 16. Replace the rocker arm cover, air cleaner bracket and housing, and the muffler. 17. Replace the engine side covers and hood. CONNECTING ROD SIDE PLAY CHECK Reason: To determine proper side clearance between the crankshaft and the connecting rod. Equipment: • Feeler Gauge NOTE: The engine must be removed from the tractor to perform this test. Procedure: 1. Remove the oil pan, crankcase extension, oil pick- up, and balancer assembly. 2. Insert a feeler gauge, according to specifications, between the connecting rod cap and the crankshaft. 3. Connecting rod side play is 0.2 - 0.4 mm (0.008 - 0.016 in.). Results: • If the side play exceeds specification, replace the bearing inserts or the connecting rod. MX1194 A B C T6105BF Normal Not Normal M82116A
- 15. 4/6/01 3 - 19 DIESEL ENGINE CONNECTING ROD BEARING CLEARANCE CHECK CONNECTING ROD BEARING CLEARANCE CHECK Reason: To measure oil clearance between connecting rod bearing and crankshaft journal. Equipment: • PLASTIGAGE® NOTE: The engine must be removed from the tractor to perform this procedure. Procedure: 1. Remove the oil pan, and oil pickup. IMPORTANT: The connecting rod caps must be installed on the same connecting rod and in the same direction to prevent crankshaft and connecting rod damage. 2. Remove the connecting rod cap. 3. Wipe oil from the bearing insert and the crankshaft journal. 4. Put a piece of PLASTIGAGE® (A), or an equivalent, along the full length of the bearing insert approximately 6 mm (0.25 in.) off center. 5. Turn the crankshaft approximately 30° from bottom dead center. 6. Install the connecting rod end cap and original rod bolts. Tighten the rod bolts to specification. Specification: Connecting Rod Bolt Torque 4200 . . . . . . . . . . . . . . . . .37 - 41 N•m (27 - 30 lb-ft) 4300, 4400 . . . . . . . . . . . .44 - 54 N•m (33 - 40 lb-ft) 7. Remove the rod bolts and the connecting rod cap. NOTE: The flattened PLASTIGAGE (B) will be found on either the bearing insert or crankshaft journal. 8. Use the graduation marks on the envelope (C) to compare the width of the flattened PLASTIGAGE at its widest point. The number within the graduation marks indicates the bearing clearance in inches or millimeters depending on which side of the envelope is used. 9. Measure the connecting rod bearing oil clearance. Specification: Connecting Rod Bearing Oil Clearance 4200 . . . . . . . . . . 0.04 - 0.09 mm (0.002 - 0.004 in.) Wear Limit. . . . . . . . . . . . . . . . 0.25 mm (0.010 in.) 4300, 4400 . . . . . 0.04 - 0.07 mm (0.002 - 0.003 in.) Wear Limit. . . . . . . . . . . . . . . . 0.16 mm (0.006 in.) Result: • If the clearance exceeds the wear limit specification, replace the bearing inserts. 10. Remove the PLASTIGAGE® . PLASTIGAGE® is a registered trademark of the DANA Corporation. M35351A M82117A B C
- 16. 3 - 20 4/6/01 CRANKSHAFT END PLAY CHECK DIESEL ENGINE CRANKSHAFT END PLAY CHECK Reason: To determine proper side clearance between the crankshaft and the engine block. Equipment: • Dial Indicator Procedure: NOTE: Crankshaft end play can be measured at front end or rear end of crankshaft. Procedure is performed from the rear end. The flywheel is removed to show detail. 1. Fasten the dial indicator (B) to engine and position indicator tip on end of crankshaft (A). IMPORTANT: Do not use excessive force when moving crankshaft to avoid damaging bearings. 2. Push the crankshaft toward rear as far as possible. 3. Zero the dial indicator. 4. Using a bar, gently pry the crankshaft as far forward as possible. 5. Crank shaft end play is 0.09 - 0.27 mm (0.004 - 0.011 in.). Results: • If the end play exceeds 0.27 mm (0.011 in,), replace the thrust bearings. CRANKSHAFT MAIN BEARING CLEARANCE CHECK Reason: To measure oil clearance between main bearing and crankshaft journal. Equipment: • PLASTIGAGE® NOTE: The engine must be removed from the tractor to perform this test. Procedure: 1. Remove the oil pan, and oil pickup. IMPORTANT: Main bearing caps must be installed on the same main bearing and in the same direction to prevent crankshaft and main bearing damage. 2. Remove the main bearing cap. 3. Wipe oil from the bearing insert and the crankshaft journal. 4. Put a piece of PLASTIGAGE® (A), or an equivalent, along the full length of the bearing insert approximately 6 mm (0.25 in.) off center. 5. Install the main bearing cap and bolts. Tighten the bolts to specification. Specification: Main Bearing Bolt Torque 4200 . . . . . . . . . . . . . .76.5 - 80.4 N•m (56 - 59 lb-ft) 4300, 4400 . . . . . . . . . . .96 - 100 N•m (71 - 74 lb-ft) 6. Remove the bolts and main bearing caps. M82118A A B M35382 A
- 17. 4/6/01 3 - 21 DIESEL ENGINE VALVE LIFT CHECK NOTE: The flattened PLASTIGAGE® (B) will be found on either the bearing insert or crankshaft journal. 7. Use the graduation marks (C) on the envelope to compare the width of the flattened PLASTIGAGE® at its widest point. The number within the graduation marks indicates the bearing clearance in inches or millimeters, depending on which side of the envelope is used. Specification: Main Bearing Oil Clearance 4200 . . . . . . . . . . 0.04 - 0.09 mm (0.002 - 0.004 in.) Wear Limit. . . . . . . . . . . . . . . . 0.25 mm (0.010 in.) 4300, 4400 . . . . . 0.04 - 0.07 mm (0.002 - 0.003 in.) Wear Limit. . . . . . . . . . . . . . . . 0.16 mm (0.006 in.) Result: • If the clearance exceeds the wear limit specification, replace the bearing inserts. 8. Remove PLASTIGAGE®. ®PLASTIGAGE is a registered trademark of the DANA Corporation. VALVE LIFT CHECK Reason: Check wear on cam lobes, followers, and/or push rods. Equipment: • Dial Indicator Procedure: 1. Remove the rocker arm cover. (See “ROCKER COVER REMOVAL AND INSTALLATION”). 2. Adjust the valve clearance. 3. Fasten the dial indicator to the engine and position the indicator tip on the valve retainer. The valve must be fully closed and the rocker arm must move freely. 4. Zero the dial indicator. 5. Manually turn the crankshaft pulley clockwise (from the fan end). 6. Observe the dial indicator as the valve is moved to the full open position. Repeat for each valve. Results: • The valve lift should be the same for all valves. If one or more valves have less travel than the others, remove and inspect the camshaft, followers and push rods. (See “CAMSHAFT”) in this section. If the camshaft, followers and push rods are within specification remove and inspect the cylinder head. (See “CYLINDER HEAD AND VALVES REMOVAL AND INSTALLATION”). CAMSHAFT END PLAY CHECK Reason: To determine proper side clearance between camshaft gear end journal and thrust plate. Equipment: • Dial Indicator Procedure: 1. Remove the timing gear cover. (See “TIMING GEAR COVER”). 2. Fasten the dial indicator to the engine and position indicator tip on end of camshaft. 3. Push the camshaft toward the rear as far as possible. 4. Zero the dial indicator. 5. Pull the camshaft forward as far as possible. M82119A C B T6333DT
- 18. 3 - 22 4/6/01 TIMING GEAR BACKLASH CHECK DIESEL ENGINE 6. Standard end play is 0.05 - 0.25 mm (0.002 - 0.010 in.). Results: • If the end play exceeds 0.25 mm (0.010 in.), remove the camshaft and replace the thrust plate. (See “CAMSHAFT”). TIMING GEAR BACKLASH CHECK Reason: To check for wear between meshing gears, resulting in excessive noise and poor engine performance. Equipment: • Dial Indicator Procedure: 1. Measure the backlash between meshing gears. 2. The backlash for all gears EXCEPT the oil pump gear is 0.07 - 0.15 mm (0.003 - 0.006 in.). 3. The backlash for the oil pump gear is 0.11 - 0.19 mm (0.004 - 0.008 in.). Results: • If the backlash exceeds specifications, replace meshing gears as a set: Idler Gear, Camshaft Gear, Crankshaft Gear, Oil Pump Gear AND/OR Idler Gear, Fuel Injection Pump Gear. FUEL INJECTION NOZZLE TEST Reason: To determine opening pressure, leakage, chatter and spray pattern of the fuel injection nozzle. Equipment: • D01109AA Diesel Fuel Injection Nozzle Tester • D01110AA Adapter Set • 23622 Straight Adapter • Container M37512 c CAUTION Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids. If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable source. Such information is available from the Deere & Company Medical Department in Moline, Illinois, U.S.A.
- 19. 4/6/01 3 - 23 DIESEL ENGINE FUEL INJECTION NOZZLE TEST Connections: 1. Connect the fuel injection nozzle (F) to D01109AA Diesel Fuel Injection Nozzle Tester (A) using parts 36352 (B), 23617 (C), 23621 (D) from D01110AA Adapter Set, and 23622 straight adapter. IMPORTANT: Use clean filtered diesel fuel when testing injection nozzles to get best test results. Procedure 1: Test the fuel injection nozzle opening pressure following the Nozzle Tester manufacturer's instructions. The opening pressure is 19600 +1000/–0 kPa (2843 +145/–0 psi). Results: • If the pressure reading does not meet specification, disassemble the injection nozzle and inspect for contamination or a stuck valve. If necessary, add or remove shims to change opening pressure. Procedure 2: Test fuel injection nozzle leakage following the nozzle tester manufacturer's instructions. 1. Dry the nozzle completely using a lint-free cloth. 2. Pressurize the nozzle to 19600 kPa (2843 psi). 3. Watch for leakage from nozzle spray orifice. Results: • Fuel should not leak from the nozzle when the nozzle is pressurized. • If the injection nozzle leaks fuel, disassemble and inspect the nozzle assembly for contamination. Inspect the valve seating surface. Replace the nozzle assembly if necessary. Procedure 3: 1. Test the fuel injection nozzle chatter and spray pattern following the nozzle tester manufacturer's instructions. 2. Pressurize nozzle to 19600 kPa (2843 psi). 3. With slow hand lever movement there should be a “chatter” sound. 4. With fast hand lever movement the nozzle should exhibit an even, fine atomized spray pattern (G). 5. Place a sheet of white paper 30 cm (12 in.) below the nozzle. The injection spray should form a perfect circle on the paper. Results: • If nozzle chatter or the spray pattern does not meet specifications, disassemble the injection nozzle and inspect the nozzle assembly for contamination. Inspect the valve seating surface. Replace the nozzle assembly if necessary. • If there is excessive difference in the spray angle or injection angle, incomplete atomizing or sluggish starting/stopping of injection (H), disassemble the injection nozzle and inspect the nozzle assembly for contamination. Replace the nozzle assembly if necessary. M35913 E D C B A F M82121A G H
- 20. 3 - 24 4/6/01 THERMOSTAT OPENING TEST DIESEL ENGINE THERMOSTAT OPENING TEST Reason: To determine opening temperature of thermostat. Equipment: • Thermometer • Glass Container • Heating Unit Procedure: 1. Suspend the thermostat and a thermometer in a container of water. 2. Heat and stir the water. Observe the opening action of the thermostat as the water heats up. 3. Remove the thermostat and observe the closing action as it cools. Results: • The thermostat should begin opening at 69.5 - 72.5° C (157 - 163° F) and be fully open at 85° C (185° F). • Replace the thermostat if the fully open lift height is less than 8 mm (0.31 in.), or if the closing action is not smooth and slow. INJECTION PUMP STATIC TIMING ADJUSTMENT (NON-EPA ENGINES) 4200 (-016705) 4300 (-011018) 4400 (-004914) Reason: To make sure that the injection pump timing is set to manufacturers specification. Equipment: • Timing Tool (Made from high pressure pipe, nut and a clear plastic straw**) ** straw from WD40, carburetor cleaner, brake parts cleaner, etc. • External fuel supply Procedure: IMPORTANT: The injection pump timing should be correct. The timing is set at the factory, and will not normally change during the life of the engine. Check and adjust the timing only as the last option, or if there is reason to believe the timing has been altered. Check the fuel, fuel supply system, injectors, air intake system and cylinder compression before continuing. NOTE: If the injection pump has been removed from engine without disturbing engine crankshaft and pump gear, perform step 1 to obtain a close starting point, then perform the entire timing procedure. 1. Align the arrow or line on the injection pump flange on the mark noted during pump removal. NOTE: Normal rotation, as viewed from the flywheel end, is counterclockwise. The number one fuel injection line is toward the flywheel. 2. Remove the number one fuel injection line. c CAUTION DO NOT allow thermostat or thermometer to rest against the side or bottom of glass container when heating water. Either may rupture if overheated. M82122A M57132
- 21. 4/6/01 3 - 25 DIESEL ENGINE INJECTION PUMP STATIC TIMING ADJUSTMENT (NON-EPA ENGINES) 3. Install the timing tool (A) and clear straw (B). 4. Remove the access panel from the flywheel housing. 5. Prime the pump to fill it with fuel. 6. Disconnect battery negative (–) terminal and remove fuel shutoff solenoid. 7. Turn the flywheel counterclockwise (as viewed from the flywheel end) until the timing tool straw has fuel showing. 8. Turn the crankshaft pulley clockwise (back) until the No. 1 cylinder top dead center (TDC) mark (A) and pump timing marks (B) have gone past the center of the timing hole in the flywheel housing (C) by at least 50 mm (2 in.). 9. Snap the straw with your finger until the level of the fuel, or a bubble, is set part way up the straw. This will be the point to watch for fuel movement. 10. Slowly turn the flywheel counterclockwise (as viewed from the flywheel end) until the fuel in the straw just starts to move. Stop rotating the flywheel the instant the fuel begins to move. NOTE: If there is no fuel movement, engine may be on exhaust stroke. Rotate flywheel 360° and repeat test. 11. Check the injection pump timing marks on the flywheel. The 14° mark on the flywheel must line up with the center of the timing hole (C) in the flywheel housing. Results: • If the timing is not within specifications, loosen the pump mounting bolts and turn the pump toward the engine block to retard the timing or away from the block to advance the timing. Recheck the timing. If the timing did not change, remove pump and have tested by an authorized diesel injection service shop. • If the timing is correct, remove timing tool, install number one injection line, install the access cover to the flywheel housing. B 30-50 mm (1.2-2.0 in.) Drill Out (#45 drill bit) A Injection Pump 1 12° BTDC 14° BTDC Direction of Engine Rotation Flywheel Timing Marks A B C 1 12° BTDC 14° BTDC Direction of Engine Rotation Flywheel Timing Marks C
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- 23. 3 - 26 4/6/01 INJECTION PUMP TIMING ADJUSTMENT (EPA ENGINES) DIESEL ENGINE INJECTION PUMP TIMING ADJUSTMENT (EPA ENGINES) EPA engines have EPA compliance sticker on rocker arm cover as shown above. IMPORTANT: Fuel injection pump timing should NOT change during the life of the engine unless the pump has been altered illegally, or there is excessive wear to the camshaft injection pump cam lobes and lifters. First check the fuel quality, fuel supply, fuel injectors, air intake system, and engine compression in all cylinders before considering fuel injection timing problems. If all other possibilities have been ruled out and it is determined that the fuel injection pump and governor assembly are in need of repair, they must be replaced ONLY as complete assemblies. Only an authorized factory trained technician is allowed to remove and install these assemblies. FAN/ALTERNATOR DRIVE BELT ADJUSTMENT Reason: To keep proper tension on the belt to drive the water pump and the alternator.To prevent shortened belt and bearing life. Equipment: • JDG529 or JDST28 BeltTension Gauge • Straight Edge Procedure: 1. Check the belt tension between the fan and alternator using a belt tension gauge and a straight edge. 2. With applied force of 98 N (22 lb-force) the belt deflection is 10 - 15 mm (0.4 - 0.6 in.). Results: • If deflection is not within specifications, loosen both alternator mounting cap screws/nuts. Apply force to FRONT alternator housing only (near the belt) until tension is correct. Tighten cap screws/nuts. ATTENTION! DO NOT attempt to adjust the fuel injection pump timing. For most engine problems, the fuel injection pump timing will not have to be adjusted. If the engine performed well at one time, then performance dropped, the fuel injection timing is NOT the problem. Fuel injection timing, once set by the engine manufacturer, should NOT change during the life of the engine. MX1339A M54014
- 24. 4/6/01 3 - 27 DIESEL ENGINE RADIATOR BUBBLE TEST RADIATOR BUBBLE TEST Reason: To determine if compression pressure is leaking from cylinder. Equipment: • JDG560 Adapter Procedure: 1. With the coolant at the proper level and the radiator cap tight, run the engine for 5 minutes to bring it to operating temperature. 2. Remove the cap from the recovery tank. 3. Check for bubbles coming from the overflow hose at the bottom of the tank. • If bubbles are present, isolate the source of the compression leak. 4. Remove the injection nozzles. 5. Install JDG560 Adapter in the injection port of the cylinder to be tested. 6. Move the piston to the bottom of the stroke with intake and exhaust valves closed. 7. Connect the hose from a compressed air source to the adapter. 8. Apply shop air pressure into the cylinder. 9. Check for bubbles in the recovery tank or air escaping from the muffler, air cleaner or oil fill opening. 10. Repeat for each cylinder. Results: • If bubbles are present in the recovery tank, check for cracks in the cylinder head and block. Check for a damaged head gasket. • If air escapes from the muffler, check for a worn exhaust valve. • If air escapes from the air cleaner, check for a worn intake valve. • If air escapes from the engine oil fill, check for worn piston rings. COOLING SYSTEM PRESSURE TEST Reason: Inspect the cooling system for leaks. Equipment: • D05104ST Cooling System Pressure Pump • JDG692 Radiator Pressure Test Kit (Adapters) Procedure: 1. Remove the cap and attach the pressure pump to radiator. 2. Apply pressure according to specifications, not to exceed 97 kPa (14 psi). 3. Check for leaks throughout the cooling system. After 15 seconds the minimum pressure is 88 kPa (12.8 psi). Results: • Pressure should hold to 88 ± 15 kPa (12.8 ± 2.2 psi). If pressure decreases, check for leaks. Repair leaks or replace parts as necessary. • If the pressure test still indicates leakage after all external leaks have been stopped, a defective head gasket, cracked block, or cylinder head may be the cause. (See “RADIATOR BUBBLE TEST”). RADIATOR CAP PRESSURE TEST Reason: Test the radiator cap for operating in the correct pressure range. Equipment: • D05104ST Cooling System Pressure Pump • JDG692 Radiator Pressure Test Kit (Adapters) T6333AW
- 25. 3 - 28 4/6/01 ENGINE OIL PRESSURE TEST DIESEL ENGINE Procedure: 1. Install the radiator cap (A) on the pressure pump. 2. Apply pressure. Pressure valve in the cap should open at 88 kPa (12.8 psi). Results: • If the cap leaks, retighten and test again. Replace the cap if pressure is not within specification. ENGINE OIL PRESSURE TEST Reason: To determine if the engine bearings or the lubrication system components are worn. Equipment: • JT03017 Hose Assembly • JT05577 Pressure Gauge (100 psi) • JT03349 Connector Procedure: 1. Remove the oil pressure sender. 2. Install JTO3349 Connector. 3. Connect JTO3017 Hose Assembly and JTO5577 Pressure Gauge. IMPORTANT: DO NOT run the engine if there is insufficient oil pressure! 4. Start the engine. If the pressure reading is below 0.06 MPa (8.7 psi) at slow idle rpm, STOP THE ENGINE. 5. If the oil pressure is at least 0.06 MPa (8.7 psi) run the engine approximately five minutes to heat the oil. Check the oil pressure at 2700 rpm. Specification: Oil Pressure 4200 . . . . . . . . . . . . . 0.29 ± 0.05 MPa (42 ± 7.2 psi) 4300, 4400 . . . . . . . . 0.34 ± 0.05 MPa (49 ± 7.2 psi) Results: • If the oil pressure is not within specifications, inspect the oil pump. • If the oil pump is within specifications, the engine may have parts worn beyond specifications. See the TROUBLESHOOTING CHART for more information. T6333AXA T6471FB