Kubota rck72 f36 front cut ride on mower service repair manual

WORKSHOP MANUAL
F2880,F3680,RCK72-F36,
RCK72R-F36,RCK60-F36,
RCK60R-F36
KiSC issued 04, 2006 A

CONTENTS
GENERAL
1. IDENTIFICATION............................................................................................. G-1
2. GENERAL PRECAUTIONS ............................................................................ G-2
3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING.. G-3
[1] WIRING...................................................................................................... G-3
[2] BATTERY................................................................................................... G-5
[3] FUSE.......................................................................................................... G-5
[4] CONNECTOR............................................................................................ G-5
[5] HANDLING OF CIRCUIT TESTER......................................................... G-6
4. LUBRICANTS, FUEL AND COOLANT ......................................................... G-7
5. TIGHTENING TORQUES ............................................................................... G-8
[1] GENERAL USE SCREWS, BOLTS AND NUTS................................... G-8
[2] METRIC SCREWS, BOLTS AND NUTS ............................................... G-8
[3] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC
OR UNF THREADS ................................................................................. G-9
[4] PLUGS....................................................................................................... G-9
6. MAINTENANCE CHECK LIST..................................................................... G-10
7. CHECK AND MAINTENANCE..................................................................... G-12
[1] DAILY CHECK ........................................................................................ G-12
[2] CHECK POINTS OF INITIAL 50 HOURS........................................... G-17
[3] CHECK POINTS OF EVERY 50 HOURS........................................... G-19
[4] CHECK POINTS OF EVERY 100 HOURS......................................... G-25
[7] CHECK POINTS OF EVERY 1500 HOURS....................................... G-30
[8] CHECK POINTS OF EVERY 3000 HOURS....................................... G-30
[9] CHECK POINTS OF EVERY 1 YEAR ................................................ G-30
[10]CHECK POINTS OF EVERY 2 YEARS.............................................. G-33
[11]OTHERS .................................................................................................. G-34
8. SPECIAL TOOLS.......................................................................................... G-35
[1] SPECIAL TOOLS FOR ENGINE .......................................................... G-35
[2] SPECIAL TOOLS FOR MACHINE........................................................ G-42
9. TIRES............................................................................................................. G-43
[1] TIRE PRESSURE ................................................................................... G-43
10. IMPLEMENT LIMITATIONS.......................................................................... G-44

G-1
F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM G GENERAL
1. IDENTIFICATION
When contacting your local KUBOTA distributor, always specify
engine model name, engine serial number and machine serial
number.
■ Engine Serial Number
The engine serial number is an identified number for the engine.
It is marked after the engine model number.
It indicates month and year of manufacture as follows.
• Year of manufacture
• Month of manufacture
e.g. D1105-5A0001
“5” indicates 2005 and “A” indicates January.
So, 5A indicates that the engine was manufactured in January,
2005.
W1010714
Alphabet or
Number
Year
Alphabet or
Number
Year
1 2001 F 2015
2 2002 G 2016
3 2003 H 2017
4 2004 J 2018
5 2005 K 2019
6 2006 L 2020
7 2007 M 2021
8 2008 N 2022
9 2009 P 2023
A 2010 R 2024
B 2011 S 2025
C 2012 T 2026
D 2013 V 2027
E 2014
Month
Engine Serial Number
0001 ~ 9999 10000 ~
January A0001 ~ A9999 B0001 ~
February C0001 ~ C9999 D0001 ~
March E0001 ~ E9999 F0001 ~
April G0001 ~ G9999 H0001 ~
May J0001 ~ J9999 K0001 ~
June L0001 ~ L9999 M0001 ~
July N0001 ~ N9999 P0001 ~
August Q0001 ~ Q9999 R0001 ~
September S0001 ~ S9999 T0001 ~
October U0001 ~ U9999 V0001 ~
November W0001 ~ W9999 X0001 ~
December Y0001 ~ Y9999 Z0001 ~
(1) Engine Model Name
(2) Engine Serial Number
(3) Machine Serial Number

G-2
2. GENERAL PRECAUTIONS
• During disassembly, carefully arrange removed parts in a clean
area to prevent confusion later. Screws, bolts and nuts should be
installed in their original position to prevent reassembly errors.
• When special tools are required, use KUBOTA genuine special
tools. Special tools which are not frequently used should be
made according to the drawings provided.
• Before disassembling or servicing electrical wires, always
disconnect the ground cable from the battery first.
• Remove oil and dirt from parts before measuring.
• Use only KUBOTA genuine parts for parts replacement to
maintain machine performance and to assure safety.
• Gaskets and O-rings must be replaced during reassembly.
Apply grease to new O-rings or oil seals before assembling.
See the figure left side.
• When reassembling external snap rings or internal snap rings,
they must be positioned so that sharp edge faces against the
direction from which a force is applied. See the figure left side.
• When inserting spring pins, their splits must face the direction
from which a force is applied. See the figure left side.
• To prevent damage to the hydraulic system, use only specified
fluid or equivalent.
W10109040
(1) Grease
(2) Force
(3) Sharp Edge
(4) Axial Force
(5) Rotating Movement
(A) External Snap Ring
(B) Internal Snap Ring

G-3
3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS
AND WIRING
To ensure safety and prevent damage to the machine and
surrounding equipment, heed the following precautions in handling
electrical parts and wiring.
IMPORTANT
■
• Check electrical wiring for damage and loosened
connection every year. To this end, educate the customer to
do his or her own check and at the same time recommend
the dealer to perform periodic check.
• Do not attempt to modify any electrical parts and wiring.
• When removing the battery cables, disconnect the negative
cable first. When installing the battery cables, connect the
positive cable first.
W10111140
[1] WIRING
• Securely tighten wiring terminals.
W10112160
• Do not let wiring contact dangerous part.
W10113130
• Securely insert grommet.
W10113880
(1) Negative Terminal (2) Positive Terminal
(1) Correct
(Securely Tighten)
(2) Incorrect
(Loosening Leads to Faulty Contact)
(1) Dangerous Part
(2) Wiring (Incorrect)
(3) Wiring (Correct)
(4) Dangerous Part
(1) Grommet (A) Correct
(B) Incorrect

G-4
• Securely clamp, being careful not to damage wiring.
W10114580
• Clamp wiring so that there is no twist, unnecessary sag, or
excessive tension, except for movable part, where sag may be
required.
W10115870
• When installing a part, take care not to trap or damage the wiring.
W10116700
• After installing wiring, check protection of terminals and clamped
condition of wiring before connecting battery.
W10117350
(1) Clamp
• Wind Clamp Spirally
(2) Wire Harness
(3) Clamp
(1) Wiring
(2) Clamp
(A) Correct
(B) Incorrect
(1) Wiring (A) Incorrect
(1) Cover
• Securely Install Cover

G-5
[2] BATTERY
• Take care not to confuse positive and negative terminal posts.
• When removing battery cables, disconnect negative cable first.
When installing battery cables, check for polarity and connect
positive cable first.
• Do not install any battery with capacity other than is specified
(Ah).
• After connecting cables to battery terminal posts, apply high
temperature grease to them and securely install terminal covers.
• Do not allow dirt and dust to collect on battery.
CAUTION
• Take care not to let battery liquid spill on your skin and
clothes. If contaminated, wash it off with water immediately.
• Before recharging the battery, remove it from the machine.
• Before recharging, remove cell caps.
• Recharging should take place in a well-ventilated place
where there is no open flame nearby, as hydrogen gas and
oxygen are produced, which is highly flammable.
W10118160
[3] FUSE
• Use fuses with specified capacity.
Neither too large or small capacity fuse is acceptable.
• Never use steel or copper wire in place of fuse.
• Do not install working light, radio set, etc. on machine without a
separate power supply.
• Do not install accessories if fuse capacity of reserve power
supply is exceeded.
W10120920
[4] CONNECTOR
• For connector with lock, push lock to separate.
W10122110
• In separating connectors, do not pull wire harnesses.
• Hold connector bodies to separate.
W10122720
(1) Fuse (2) Slow Blow Fuse
(A) Push
(A) Correct (B) Incorrect

G-6
• Use sandpaper to remove rust from terminals.
• Repair damaged terminals. Make certain there is no terminal
being exposed or displaced.
W10123460
• Make certain that there is no uninsulated femal connectors.
W10124300
• Make certain the plastic cover is large enough to cover whole
connector.
W10125190
[5] HANDLING OF CIRCUIT TESTER
• Use the tester, according to its own operating instructions.
• Check for polarity and range.
W10126840
(1) Exposed Terminal
(2) Deformed Terminal
(3) Sandpaper
(4) Rust
(A) Correct (B) Incorrect
(1) Cover (A) Correct
(B) Incorrect

G-7
4. LUBRICANTS, FUEL AND COOLANT
* KUBOTA original transmission hydraulic fluid.
No. Place
Capacity
Lubricants, fuel and coolant
F2880 F3680
1 Fuel
61 L
16.1 U.S.gals
13.4 Imp.gals
No. 2-D diesel fuel
No.1-D diesel fuel if temperature
is below – 10 °C (14 °F)
2 Coolant
Cooling
system
4.6 L
4.9 U.S.qts
4.0 Imp.qts
Fresh clean water with anti-freeze
Recovery
tank
0.6 L
0.6 U.S.qts
0.5 Imp.qts
3 Engine crankcase
3.8 L
4.0 U.S.qts
3.3 Imp.qts
5.3 L
5.6 U.S.qts
4.7 Imp.qts
Engine oil : API Service
Classification CD, CE or CF Below
0 °C (32 °F) :
SAE10W, 10W-30 or 10W-40
0 to 25 °C (32 to 77 °F):
SAE20, 10W-30 or 10W-40
Above 25 °C (77 °F):
SAE30, 10W-30 or 10W-40
4 Transmission case
14.0 L
14.8 U.S.qts
12.3 Imp.qts
KUBOTA UDT or SUPER UDT
fluid*
5
Rear axle differential
case
1.5 L
1.59 U.S.qts
1.32 Imp.qts
KUBOTA UDT, SUPER UDT
fluid* or SAE85W, SAE90 gear oil
(API Service Classification : more
than GL-3)
6 Rear axle gear case
0.5 L
0.53 U.S.qts
0.44 Imp.qts
Greasing
No. of greasing points
Capacity Type of grease
F2880 F3680
Speed control pedal
shaft
1
Until grease
overflows
Multipurpose Grease
NLGI-2 or NLGI-1
(GC-LB)
Link pivots
(RH and LH)
2
Differential lock pedal
boss
1
Universal joint 1
Rear wheel drive
shaft (Front and Rear)
2
Knuckle arm
(RH and LH)
2
Seat adjuster 2
Moderate
amount
Oil
HST neutral shaft 1
Cable (Throttle) 1

G-8
5. TIGHTENING TORQUES
[1] GENERAL USE SCREWS, BOLTS AND NUTS
Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened
according to the table below.
W1034542
[2] METRIC SCREWS, BOLTS AND NUTS
W1013689
Indication on top of
bolt
No-grade or 4T 7T 9T
Material of bolt SS400, S20C S43C, S48C
SCr435,
SCM435
Material of opponent
part
Ordinariness Aluminum Ordinariness Aluminum Ordinariness
Unit
Diameter
N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs N·m kgf·m ft-lbs
M6
(6 mm, 0.24 in.)
7.85
to
9.31
0.80
to
0.95
5.79
to
6.87
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
9.81
to
11.2
1.00
to
1.15
7.24
to
8.31
7.85
to
8.82
0.80
to
0.90
5.79
to
6.50
12.3
to
14.2
1.25
to
1.45
9.05
to
10.4
M8
(8 mm, 0.31 in.)
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
16.7
to
19.6
1.7
to
2.0
12.3
to
14.4
23.6
to
27.4
2.4
to
2.8
17.4
to
20.2
17.7
to
20.5
1.8
to
2.1
13.1
to
15.1
29.5
to
34.3
3.0
to
3.5
21.7
to
25.3
M10
(10 mm, 0.39 in.)
39.3
to
45.1
4.0
to
4.6
29.0
to
33.2
31.4
to
34.3
3.2
to
3.5
23.2
to
25.3
48.1
to
55.8
4.9
to
5.7
35.5
to
41.2
39.3
to
44.1
4.0
to
4.5
29.0
to
32.5
60.9
to
70.6
6.2
to
7.2
44.9
to
52.0
M12
(12 mm, 0.47 in.)
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5
– – –
77.5
to
90.2
7.9
to
9.2
57.2
to
66.5
62.8
to
72.5
6.4
to
7.4
46.3
to
53.5
103
to
117
10.5
to
12.0
76.0
to
86.7
M14
(14 mm, 0.55 in.)
108
to
125
11.0
to
12.8
79.6
to
92.5
– – –
124
to
147
12.6
to
15.0
91.2
to
108
– – –
167
to
196
17.0
to
20.0
123
to
144
M16
(16 mm, 0.63 in.)
167
to
191
17.0
to
19.5
123
to
141
– – –
197
to
225
20.0
to
23.0
145
to
166
– – –
260
to
304
26.5
to
31.0
192
to
224
M18
(18 mm, 0.71 in.)
246
to
284
25.0
to
29.0
181
to
209
– – –
275
to
318
28.0
to
32.5
203
to
235
– – –
344
to
402
35.0
to
41.0
254
to
296
M20
(20 mm, 0.79 in.)
334
to
392
34.0
to
40.0
246
to
289
– – –
368
to
431
37.5
to
44.0
272
to
318
– – –
491
to
568
50.0
to
58.0
362
to
419
Grade
Property class 8.8 Property class 10.9
Unit
Nominal Diameter
N·m kgf·m ft-lbs N·m kgf·m ft-lbs
M8 23.6 to 27.4 2.40 to 2.80 17.4 to 20.2 29.4 to 34.3 3.00 to 3.50 21.7 to 25.3
M10 48.1 to 55.8 4.90 to 5.70 35.5 to 41.2 60.8 to 70.5 6.20 to 7.20 44.9 to 52.1
M12 77.5 to 90.1 7.90 to 9.20 57.2 to 66.5 103.0 to 117.0 10.50 to 12.00 76.0 to 86.8
M14 124.0 to 147.0 12.60 to 15.00 91.2 to 108.0 167.0 to 196.0 17.00 to 20.00 123.0 to 144.0
M16 196.0 to 255.0 20.0 to 23.0 145.0 to 166.0 260.0 to 303.0 26.50 to 31.00 192.0 to 224.0

G-9
[3] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR
UNF THREADS
W1022485
[4] PLUGS
0000001666E
Grade
SAE GR.5 SAE GR.8
Unit
Nominal Diameter
5/16 23.1 to 27.8 2.35 to 2.84 17.0 to 20.5 32.5 to 39.3 3.31 to 4.01 24.0 to 29.0
3/8 47.5 to 57.0 4.84 to 5.82 35.0 to 42.0 61.0 to 73.2 6.22 to 7.47 45.0 to 54.0
1/2 108.5 to 130.2 11.07 to 13.29 80.0 to 96.0 149.2 to 179.0 15.22 to 18.27 110.0 to 132.0
9/16 149.2 to 179.0 15.22 to 18.27 110.0 to 132.0 217.0 to 260.4 22.14 to 26.57 160.0 to 192.0
5/8 203.4 to 244.1 20.75 to 24.91 150.0 to 180.0 298.3 to 358.0 30.44 to 36.53 220.0 to 264.0
Shape Size
Material of opponent part
Ordinariness Aluminum
Tapered
screw
R1/8 13 to 22 1.3 to 2.2 9.6 to 16.2 10 to 12 1.0 to 1.2 7.4 to 8.9
R1/4 29 to 44 3.0 to 4.5 21.4 to 32.5 20 to 29 2.0 to 3.0 14.8 to 21.4
Straight
screw
G1/4 29 to 39 3.0 to 4.0 21.4 to 28.8 – – –
G3/8 49 to 59 5.0 to 6.0 36.1 to 43.5 – – –
G1/2 59 to 78 6.0 to 8.0 43.5 to 57.5 – – –

G-10
6. MAINTENANCE CHECK LIST
IMPORTANT
■
• The jobs indicated by ”★” must be done initially during pre-delivery inspection.
• *1 : This maintenance should be done daily more in dusty conditions than in normal conditions.
Suggested cleaning interval is every 100 hours in normal conditions.
• The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the
U.S.EPA nonroad emission regulation. As the engine owner, you are responsible for the performance of
the required maintenance on the engine according to the above instruction.
W1035769
No.
Period
Item
Service Interval
After
since
Impor-
tant
Refer-
ence
page
50 100 150 200 250 300 350 400 450 500 550 600
1 Safety device Check ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩
every
50Hr
G-19
2 Greasing – ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩
every
50Hr
G-20
3 Oiling – ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩
every
50Hr
G-21
4 Battery condition Check ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩
every
50Hr
G-22
5
Air cleaner element
Clean ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩
every
50Hr
*1
@
G-24
Replace
every 1
year
G-30
6 Engine oil Change ★ ✩ ✩ ✩ ✩ ✩ ✩
every
100Hr
G-17
7 Fan belt Adjust ✩ ✩ ✩ ✩ ✩ ✩
every
100Hr
G-25
8 Brake pedal free travel Adjust ✩ ✩ ✩ ✩ ✩ ✩
every
100Hr
G-25
9 Fuel filter
Check ✩ ✩ ✩ ✩ ✩ ✩
every
100Hr
@
G-25
Replace
✩ every
400Hr
G-29
10 Engine oil filter cartridge Replace ★ ✩ ✩ ✩
every
200Hr
G-17
11 Transmission fluid Change ★ ✩ ✩
every
200Hr
G-26
12
Transmission oil filter
cartridge
Replace ★ ✩ ✩ ✩
every
200Hr
*1 G-18
13 Transmission oil strainer Clean ★ ✩ ✩
every
200Hr
G-26
14
Rear axle differential case
fluid
Change ★ ✩ ✩
every
200Hr
G-27
15
Rear axle gear case (RH
and LH) fluid
Change ★ ✩ ✩
every
200Hr
G-27
16 Radiator hose and clamp
Check ✩ ✩ ✩
every
200Hr
G-27
Replace
every 2
years
G-33
17 Hydraulic hose
Check ✩ ✩ ✩
every
200Hr
G-28
Replace
every 2
years
G-33

G-11
(Continued)
W1023987
No.
Period
Item
Service Interval
After
since
Impor-
tant
Refer-
ence
page
50 100 150 200 250 300 350 400 450 500 550 600
18 Fuel line
Check ✩ ✩ ✩
every
200Hr
@
G-28
Replace
every 2
years
G-33
19 Intake air line
Check ✩ ✩ ✩
every
200Hr
@
G-29
Replace
every 2
years
–
20 Rear axle pivot Adjust ✩
every
400Hr
G-29
21
Fuel injection nozzle
(injection pressure)
Check
every
1500Hr
@ G-30
22 Injection pump Check
every
3000Hr
@ G-30
23 Radiator Clean
every 1
year
G-31
24 Coolant Change
every 1
year
@ G-31
25 Fuel system Bleed
Service
as
Required
G-34
26 Fuse Replace G-34
27 Light bulb Replace G-34
28 Lift spring Adjust G-34

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G-12
7. CHECK AND MAINTENANCE
CAUTION
• Be sure to check and service the machine on a flat area with engine shut off, the parking brake set and
chock the weel.
[1] DAILY CHECK
To prevent trouble from occurring, it is important to know the condition of the machine. Check the following items
before starting.
Checking
• Walk around the machine.
1. The tire pressure, wear and damage
2. Oil and water leak
3. Engine oil level
4. Transmission fluid level
5. Battery electrolyte
6. Coolant level in the recovery tank
7. Damage of machine body, tightness of all screws, bolts and nuts
8. Radiator screen
9. Bonnet screen
10.Brake pedal free travel
11.Fuel level
12.Air cleaner
• While sitting in the operator’s seat
1. Speed control pedal
2. Brake pedal
3. Parking brake
• Turning the key switch “ON”.
1. Performance of the easy checker light
2. Head light
• Starting the engine.
1. Color of the exhaust fumes
2. Safety start switch, seat safety control and another safety devices
3. Check for abnormal noise and vibration
• Others.
1. Check the areas where previous trouble was experienced

G-13
Checking Engine Oil Level
CAUTION
• Always stop the engine and remove the key before checking
oil.
1. Check engine oil before starting and 5 minutes or more after the
engine has stopped.
2. Wipe dipstick (2) area clean.
3. To check the oil level, remove the dipstick (2), wipe it clean,
reinsert it, and draw it out again. Check to see that the oil level
is between the two notches.
4. Add new oil to the prescribed level at the oil inlet (1) if necessary.
5. When using a different brand or viscosity oil from the previous
one, remove all of the old oil and oil filter. Never mix two different
types of oil.
6. Use the proper Engine Oil SAE according to the ambient
temperatures. (See page G-7.)
W1047516
(1) Engine Oil Inlet
(2) Oil Level Dipstick
A : Oil level is acceptable within this
range

Kubota rck72 f36 front cut ride on mower service repair manual

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