Caterpillar Cat 336D L Excavator (Prefix PTB) Service Repair Manual Instant Download.pdf

Service Repair Manual
Models
336D L Excavator

Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 138-7573 Link Bracket 2
C 1P-1863 Retaining Ring Pliers 1
D
208-6033 Spanner Socket As 1
208-6034 Spacer 1
E 138-7574 Link Bracket 2
H 6V-7030 Micrometer Depth Gauge Group 1
J FT-2770 Leak Down Test Tool 1
K 1U-6396 O-Ring Assembly Compound 1
L 5P-3931 Anti-Seize Compound 1
M 1U-8846 Gasket Sealant 1
N 8T-9206 Duo-Cone Seal Installer As 1
P 5P-3931 Anti-Seize Compound 1
Q 235-4848 Drill Fixture Gp 1
R 9S-3263 Thread Lock Compound 1
Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned
in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts.
Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are
worn or damaged, use new parts for replacement. All disassembly and all assembly procedures
must be performed on a clean work surface and in a clean hydraulic area. Keep cleaned parts
covered and protected at all times.
Note: O-ring seals, gaskets, and seals should always be replaced. A used O-ring seal may not have
the same sealing properties as a new O-ring. Use Tooling (K) during the assembly procedure.
Note: Apply a light film of hydraulic oil to all components before assembly.
Note: Some of the images that are in this procedure do not show the sprocket assembly that is
attached to the final drive housing. If necessary, the weights that are given include the weight of
the sprocket assembly.
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Illustration 1 g01147975
1. Apply Tooling (P) to the outer diameter of the bearings.
2. Use a suitable press to Install bearings (40) and (41). Make sure that bearing (41) and
bearing (40) contact the counterbore in housing (36).
3. Use Tooling (N) to install Duo-Cone seal (39B).
4. Use Tooling (N) to install Duo-Cone seal (39A) onto housing (38).
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5. Use Tooling (E) and a suitable lifting device to install housing (36) onto housing (38). The
weight of housing (36) is approximately 100 kg (220 lb).
6. Remove Tooling (E) from housing (36).
7. Install stopper plate (35). Do not tighten stopper plate assembly (35) at this time.
Note: Stopper plate (35) will secure housing (36) to housing (38).
8. Install Tooling (E) and a suitable lifting device to housing (36). The combined weight of
housing assembly (36) and (38) is approximately 120 kg (265 lb). Install housing assembly
(36) and (38) in a suitable press.
9. Remove stopper plate (35).
10. Assemble Tooling (D), as shown.
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11. Install Tooling (D) into housing (36), as shown.
12. Apply a force of 4000 kg (8818 lb) to the top of Tooling (D). Rotate housing (36) to seat the
bearings.
13. Reduce the force on the top of Tooling (D) to 3000 kg (6615 lb).
14. Use Tooling (H) to take a measurement in three locations. Average the three measurements
and record the average measurement as Dimension (W).
15. Remove Tooling (D).
16. Separate Tooling (D).
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17. Use a micrometer to measure the thickness at three locations of the spacer from Tooling
(D). Record the average measurement as Dimension (X).
18. Use a micrometer to measure the thickness at three locations of stopper plate (35). Record
the average measurement as Dimension (Y).
19. Subtract Dimension (X) from Dimension (Y) and record this figure as Dimension (Z).
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20. Install stopper plate (35) onto housing (38). Do not tighten stopper plate (35) at this time.
Stopper plate (35) will secure the final drive assembly while the final drive assembly is
repositioned onto Tooling (A).
21. Use Tooling (E) and a suitable lifting device to reposition the final drive assembly onto
Tooling (A). The combined weight of housing assembly (36) and (38) is approximately
120 kg (265 lb).
22. Secure the final drive assembly to Tooling (A).
23. Secure the spanner socket from Tooling (D) to stopper plate (35).
24. to determine the final bearing preload, add Dimension (W) to Dimension (Z) and record this
figure as Dimension (V).
25. Use Tooling (H) to measure the distance in three locations.
26. Tighten stopper plate (35) until the average of the measurements is equal to Dimension (V).
27. Remove Tooling (D).
28. Install Tooling (Q) and a suitable vacuum onto stopper plate (35).
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29. Use a suitable drill and Tooling (Q) to drill a hole to the depth of 15 mm (0.6 inch) in the
stopper plate and in housing (38).
30. Install dowel (37).
31. Apply Tooling (R) to bolts (35A). Install plate (35B) and bolts (35A).
32. Repeat Steps 28 through 31 for the opposite side of stopper plate (35).
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33. Install O-ring seal (34) on housing (36).
34. Install gear (33) on housing (36).
35. Assemble carrier assembly (27), as follows.
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a. Use a deburring tool to remove the metal burr from the openings in the carrier.
b. Install two bearings (31) in planetary gear (32).
c. Install thrust washers (30) and planetary gear (32) in the carrier assembly.
d. Install planetary shaft (28) in the carrier assembly.
e. Align the split in spring pin (29) to the top or to the bottom. Make a stake mark on
each side of the spring pin hole in the carrier. Each stake mark should be
approximately 1.50 mm (0.059 inch) from the outside diameter of the spring pin hole.
f. Drive spring pin (29) into planetary shaft (28) with a hammer and a punch.
36. Repeat Steps 35.a through 35.e to install the other two planetary gears in the carrier.
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37. Use two people to install carrier assembly (27) in gear (33). The weight of carrier assembly
(27) is approximately 38 kg (85 lb).
38. Install spacer (26). Install gear (25).
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a. Use a deburring tool to remove the metal burr from the openings in the carrier.
b. Install bearing (23) in planetary gear (24).
c. Install thrust washers (22) and planetary gear (24) in the carrier assembly.
d. Install planetary shaft (21) in the carrier assembly.
e. Drive spring pin (20) into planetary shaft (21) with a hammer and a punch.
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f. Align the split in the spring pin to the top or to the bottom. Make a stake mark on
each side of the spring pin hole in the carrier. Each stake mark should be
approximately 1.50 mm (0.059 inch) from the outside diameter of the spring pin hole.
g. Repeat Steps 39.a through 39.f to install the other two planetary gears in the carrier.
40. Install carrier assembly (19) into gear (33).
41. Install retaining ring (18).
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Note: Make sure that the oil passages in the shafts are oriented toward the center of carrier
assembly (15).
43. Raise the temperature of carrier assembly (15). Lower the temperature of the shafts. Install
the shafts into carrier assembly (15) until the groove of the shafts is at Dimension (A).
Dimension (A) equals 25.00 ± 0.10 mm (0.984 ± 0.004 inch).
44. Make eight stake marks at distance of Dimension (C) from each shaft. Dimension (C)
equals 2.0 ± 1.0 mm (0.08 ± 0.04 inch). The width of each stake mark should be equal to
Dimension (B). Dimension (B) equals 4.0 ± 1.0 mm (0.16 ± 0.04 inch).
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a. Install carrier assembly in position on gear (16).
b. Install retaining ring (14) onto gear (16).
c. Install washer (11). Install bearing assembly (13). Install gear (12). Install washer
(11). Install retaining ring (10) with Tooling (C).
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d. Repeat Steps 45.a through 45.c for the other two planetary gears.
47. Install O-ring seal (7) on plugs (4).
48. Install plugs (4) and spacer (6) in cover (2).
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49. Position gear (5). Install bolts (3).
50. Place a piece of solder in the center of gear (8).
Note: You may need to apply some grease to the solder to keep the solder in position on
gear (8).
51. Use Tooling (B) and a suitable lifting device to Install cover (2). The weight of cover (2) is
approximately 32 kg (70 lb).
52. Install four bolts (1) at 90 degrees from each other. Tighten bolts (1) in a crisscross pattern
to a torque of 420 ± 60 N·m (310 ± 44 lb ft). Turn bolts (1) anadditional60 ± 5 degrees.
53. Remove bolts (1).
54. Use Tooling (B) and a suitable lifting device to remove cover (2). The weight of cover (2) is
55. Use a micrometer to measure the thickness of the solder. Record this measurement to
determine the thickness of the shims for plate (6). Adjust the shims to obtain a clearance of
1.000 + 1.000 mm (0.0394 + 0.0394 inch) between plate (6) and gear (8).
56. Apply Tooling (M) to the mating surfaces of cover (2) and the housing.
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57. Use Tooling (B) and a suitable lifting device to Install cover (2). The weight of cover (2) is
58. Apply Tooling (R) to bolts (1). Install bolts (1) and the washers. Tighten bolts (1) in a
crisscross pattern to a torque of 900 ± 100 N·m (664 ± 74 lb ft).
59. Remove plug (4) (not shown). Attach Tooling (J) to cover (2). Reduce the air pressure at the
source to 103 kPa (15 psi). Apply air pressure to Tooling (J). This air will test the Duo-Cone
seals.
60. Use the ball valve on Tooling (J) to eliminate the air pressure to the final drive. A pressure
of 98 kPa (14.2 psi) must be maintained for 30 seconds.
61. Remove Tooling (J). Install plug (6). Torque plug (6) to 80 ± 10 N·m (59 ± 7 lb ft).
62. Remove the final drive from Tooling (A). The weight of the final drive assembly is
End By:
a. If necessary, install the final drive sprocket. Refer to Disassembly and Assembly, "Final
Drive Sprocket - Remove and Install".
b. Install the final drive. Refer to Disassembly and Assembly, "Final Drive - Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
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Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 336D L EXCAVATOR PTB
Configuration: 336D L Excavator PTB00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic
Power Unit Machine Systems
Media Number -RENR8648-30 Publication Date -01/03/2015 Date Updated -15/08/2018
i06252857
Final Drive - Assemble - Type-Two
SMCS - 4050-016
S/N - B6H568-UP
S/N - DTS1-UP
S/N - EAH1-UP
S/N - EDX1-UP
S/N - EFT1-UP
S/N - ERN275-UP
S/N - FAR1-UP
S/N - FFK1-UP
S/N - GGE1-UP
S/N - GGH1-UP
S/N - HHK1-UP
S/N - J2F1-UP
S/N - JBT1-UP
S/N - JLP299-UP
S/N - JTN1-UP
S/N - JWR1-UP
1/27
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S/N - KDJ1-UP
S/N - LMG1-UP
S/N - LRM1-UP
S/N - M3M1-UP
S/N - M3N1-UP
S/N - M4T1-UP
S/N - MDS1-UP
S/N - MEY179-UP
S/N - MPL1-UP
S/N - MWP1-UP
S/N - MYG1-UP
S/N - MYP1-UP
S/N - NBD169-UP
S/N - NBN1-UP
S/N - PGW1-UP
S/N - PPN1-UP
S/N - PRF1-UP
S/N - PTB1-UP
S/N - RAS573-UP
S/N - T2Y226-UP
S/N - THJ1-UP
S/N - TLY1-UP
S/N - W3K1-UP
S/N - WDC1-UP
S/N - WET1-UP
S/N - WRK1-UP
2/27
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S/N - XBH1-UP
S/N - YCF1-UP
S/N - ZCT1-UP
S/N - ZML1-UP
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 439-3940 Link Bracket 3
B 439-3939 Link Bracket 2
D
8T-9206 Duo-Cone Seal Installer As 1
169-0503 Installation Kit 1
E 1U-9895 Crossblock 1
F - Loctite Copper Anti Seize -
G - Loctite 243 -
H - Loctite RTV Silicone Clear -
J FT-2770 Leak Down Test Tool 1
K 6V-2012 Depth Micrometer 1
L 6V-7059 Micrometer 1
1. Make sure that all parts of the final drive are thoroughly clean and free of dirt and debris
prior to assembly. Check the condition of all O-ring seals that are used in the final drive. If
any of the seals are damaged, use new parts for replacement.
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2. Use Tooling (D) to install Duo-Cone seal (45) .
3. Apply Tooling (F) to the surface of dowels (46) . Install dowels (46) .
4. Raise the temperature of lower bearing cone (47) . Install lower bearing cone (47) on motor
housing (48) .
5. Lower the temperature of bearing cups (43) . Install bearing cups (43) in sprocket housing
(41) .
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6. Use Tooling (D) to install Duo-Cone seal (44) .
7. Attach Tooling (B) and a suitable lifting device to sprocket housing (41) . The weight of
sprocket housing (41) is approximately 110 kg (243 lb). Install sprocket housing (41) .
8. Raise the temperature of upper bearing cone (42) . Install upper bearing cone (42) .
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9. Use Tooling (E) and a suitable press in order to apply force to upper bearing cone (42) .
Apply a force of 4000 kg (8818 lb) to the top of Tooling (E) . Rotate sprocket housing (41)
in order to seat the roller bearings.
10. Reduce the force on top of Tooling (E) to 3000 ± 300 kg (6614 ± 661 lb). Use Tooling (K)
in order to measure Dimension (X) . Record Dimension (X) .
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11. Remove Tooling (E) .
12. Use Tooling (K) in order to measure Dimension (W) on coupling gear (39) . Record
Dimension (W) .
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13. Subtract Dimension (X) from Dimension (W) and record the difference as Dimension (V) .
The correct shim thickness is Dimension (V) . Use Tooling (L) in order to measure the
correct thickness of shims (40) . The tolerance of Dimension (V) is 0 ± 0.05 mm (0.0 ±
0.002 inch).
Note: Use a maximum of two shims (40) . If two shims (40) are used to achieve the proper
dimension, install the thinner of the two shims toward coupling gear (39) .
14. Install shims (40) .
15. Apply Tooling (G) to the threads of bolts (38) . Install coupling gear (39) and bolts (38) .
Tighten bolts (38) to a torque of 900 ± 100 N·m (665 ± 75 lb ft).
16. Install O-ring seal (37) in sprocket housing (41) .
17. Thoroughly clean the mating surface of sprocket housing (41) that makes contact with ring
gear (36) .
18. Attach Tooling (A) and a suitable lifting device to ring gear (36) . Put ring gear (36) in
position on sprocket housing (41) . The weight of ring gear (36) is approximately 65 kg
(143 lb). Make sure that the alignment marks on sprocket housing (38) and ring gear (36)
are lined up with each other.
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