Caterpillar Cat 345B L Series II Excavator (Prefix ALB) Service Repair Manual (ALB00001 and up).pdf

Service Repair Manual
Models
345B and 345B L Series II
Excavator

NOTICE
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will
reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always
plug or cap the lines, fittings, or hoses as they are disconnected. Cover
any disassembled components and clean them properly before
assembly.
Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
Note: If a failure occurs, an accurate diagnosis of the cause can prevent a recurrence. Information
is available to analyze failures for piston pumps and motors. Refer to Special Publication,
SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".
Note: Inspect all parts. If any parts are worn or damaged use new parts for replacement. The
installation of used parts during reconditioning is acceptable. Reuse and salvage information is
available on piston pumps. Refer to Guideline for Reusable Parts and Salvage Operations,
SEBF8032, "Piston Pumps and Motors". During reconditioning, correct any conditions that might
have caused the original failure.
1. Thoroughly clean the outside of the travel motor prior to disassembly. Fasten the travel
motor to a suitable holding fixture in a vertical position. The weight of the travel motor is
141 kg (310 lb).
Illustration 1 g00627438
2. Remove displacement change valve (1) from the head of the travel motor.
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3. Remove three O-ring seals (2) and two rings (3) from the displacement change valve.
4. Remove three plugs (5) from the head. Remove an O-ring seal from each plug.
5. Remove six outer bolts (4) from the head of the travel motor.
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6. Use Tooling (A) and a suitable lifting device to remove the head of the travel motor from
the travel motor housing. The head weighs 43 kg (95 lb).
Note: There are three pins (7) that may fall out of the inside of the head when the head is
removed.
Note: Be careful during the removal of head (6) from the travel motor housing. Be careful
not to scratch mating surfaces or damage the mating surfaces of the components.
7. Turn over the head. If three pins (7) are in the bottom side of the head, remove the pins.
8. Remove port plate (8) and O-ring seal (9) from the head.
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9. Use Tooling (B) in order to remove bearing (10) from the head of the travel motor.
10. Remove plate (11) and remove springs (12) from the travel motor housing.
11. Remove O-ring seals (13) from the upper surface of the travel motor housing.
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12. Install Tooling (C) on the brake piston (14). Remove the brake piston.
13. Remove O-ring seals (15) and the backup rings from the brake piston.
Note: Make sure that you take note of the location of the O-rings versus the backup rings.
14. Remove six separator plates (16) from the travel motor housing.
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15. Remove five friction disks (17) from the travel motor housing.
16. Install Tooling (D) to the shaft and use a suitable lifting device in order to remove the
rotating group from the travel motor housing. The weight of the rotating group is 29 kg (65
lb).
Note: Do not allow the components of the rotating group to come apart during the removal
from the travel motor. All of the components in the rotating group must be reinstalled in the
component's original location.
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17. Turn over the rotating group. Remove shaft assembly (18) from the rotating group.
18. Use a suitable press to remove bearing (19) from shaft (18) .
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19. Use Tool (E) and a suitable press in order to remove inner race (20) from shaft (18) .
20. Remove cam plate (21) from the rotating group.
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21. Retainer (22) and piston assemblies (23) are not serviced separately. Prior to the removal of
the retainer and the piston assemblies from barrel (24), put identification marks on the
piston assemblies, the retainer and the barrel for assembly purposes.
22. The piston assemblies must be reinstalled in the original bores in the retainer and the barrel.
23. Remove retainer (22) and piston assemblies (23) from barrel (24) .
24. Separate the piston assemblies from the retainer.
Note: The orientation of the four washers (25) is important. The four washers must be
reinstalled on barrel (24) in the same orientation.
25. Remove guide (26) and outer spacer (27) from barrel (24) .
26. Remove four washers (25) and inner spacer (28) from the barrel.
27. Remove two keys (29) from the travel motor housing.
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28. Use Tooling (F) to remove retaining ring (30) from the shaft end of the travel motor
housing.
29. Use Tooling (G) to remove lip type seal (31) from the travel motor housing if the shaft has
been removed from the travel motor.
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30. Use Tooling (H) to remove lip type seal (31) if the shaft has not been removed from the
travel motor. Place the travel motor in a vertical position when you use Tooling (H) to
remove the lip type seal.
31. Remove plug (33) and piston (32) from the travel motor housing. Remove O-ring seal (34)
from the plug.
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
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Product: EXCAVATOR
Model: 345B II EXCAVATOR ALB
Configuration: 345B L Series II Excavators ALB00001-UP (MACHINE) POWERED BY 3176C Engine
Disassembly and Assembly
345B, 345B Series II and W345B Series II Excavators Machine Systems
Media Number -SENR1934-11 Publication Date -01/01/2012 Date Updated -12/01/2012
i01324820
Travel Motor - Assemble - Series II
SMCS - 4351-016
S/N - AGS1-UP
S/N - AKJ1-UP
S/N - AKX1-UP
S/N - ALB1-UP
S/N - ALD1-UP
S/N - AMD1-UP
S/N - AMJ1-UP
S/N - AMN1-UP
S/N - APB1-UP
S/N - AYR1-UP
S/N - CCC1-UP
S/N - DCW1-UP
S/N - DET1-UP
S/N - FEE1-UP
Assembly Procedure
Table 1
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Required Tools
Tool Part Number Part Description Qty
(A) 180-6533 Seal Driver 1
(B) 6V-7030 Micrometer Depth Gauge 1
(C) 8T-0447 Calipers 1
(D) 4C-8359 Eyebolt 1
(E) 1P-0510 Driver Group 1
(F) 3E-3879 Eyebolt 1
(G) 1P-1862 Pliers 1
NOTICE
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will
reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always
plug or cap the lines, fittings, or hoses as they are disconnected. Cover
any disassembled components and clean them properly before
assembly.
Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
Note: If a failure occurs, an accurate diagnosis of the cause can prevent a recurrence. Information
is available to analyze failures for piston pumps and motors. Refer to Special Publication,
SEBD0641, "Analyzing Axial Piston Pump and Motor Failures".
Note: Inspect all parts. If any parts are worn or damaged use new parts for replacement. The
installation of used parts during reconditioning is acceptable. Reuse and salvage information is
available on piston pumps. Refer to Guideline For Reusable Parts and Salvage Operations,
SEBF8032, "Piston Pumps and Motors". During reconditioning, correct any conditions that might
have caused the original failure.
Note: O-rings, gaskets, and seals should always be replaced. A used O-ring may not have the
same sealing properties as a new O-ring. Use 1U-6396 O-Ring Assembly Compound during the
assembly procedure.
Note: Apply a light film of "10W" oil to all components before assembly.
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1. Install O-ring seal (36) on plug (35) .
2. Install piston (34) and the plug in the travel motor body. Tighten the plug to a torque of 430
± 40 N·m (317 ± 30 lb ft).
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3. Apply a thin coat of 4C-4030 Thread Lock Compound on the outer surfaces of lip type seal
(33) .
4. Use Tooling (A) and a suitable hammer to drive the lip type seal into the travel motor body.
Drive the seal downward until Tooling (A) makes contact with the travel motor housing.
5. Use Tooling (G) to install retaining ring (32) to the shaft end of the travel motor body.
6. Install two keys (31) inside the travel motor body.
7. Assemble washers (29), inner spacer (30) and outer spacer (28) in the proper orientation, as
shown.
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8. Use Tooling (B) to measure the distance from the outer spacer to the surface of the table.
The distance should be 22.1 ± 0.6 mm (0.87 ± 0.02 inch). If this measurement is off, check
orientation of the washers. If orientation is correct, replace washers and spacers with new
parts.
9. Install inner spacer (28), four washers (25), and outer spacer (27) to barrel (24) .
10. Install guide (26) to the barrel.
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11. Install piston assemblies (23) with retainer (22) in the piston assembly's original bore in
barrel (24) .
12. Install cam plate (21) on the barrel assembly.
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13. Use a suitable press to install bearing (19) onto shaft (18) .
14. Use a suitable press in order to install inner race (20) onto shaft (18) .
Note: Place the two support plates under the lip of shaft (18) .
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15. Insert shaft (18) in the barrel assembly.
16. Alternate five friction disks (17) and six separator plates (16) into the travel motor housing.
Start with a separator plate and end with a separator plate.
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17. Attach Tooling (D) to the shaft. Use a suitable lifting device in order to place barrel
assembly into the travel motor body.
Note: Align the notches of the cam plate with the keys in the travel motor body before you
lower the barrel assembly into the travel motor body.
18. Use Tooling (C) to measure the depth from the top surface of the travel motor body to the
bronze face of the barrel assembly. The distance should be 38 ± 2 mm (1.5 ± 0.08 inch). If
this measurement is off, check orientation of the barrel assembly. Also check if the cam
plate is properly seated on the keys.
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(15) O-Ring seals
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19. Install O-ring seals (15) and the backup rings on the brake piston.
Note: Make sure that you install the backup ring and the O-ring seal in the original position.
Refer to Illustration 19.
20. Install brake piston (14) in the body of the travel motor by hand. It may be necessary to use
a soft faced hammer to seat the brake piston correctly.
21. Use Tooling (C) to measure the distance from the top of the brake piston (14) to the top
surface of the travel motor body. The distance should be 20.8 ± 1 mm (0.82 ± 0.04 inch). If
this measurement is off, drive the brake piston further into the travel motor body.
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22. Install springs (12) and plate (11) .
23. Install O-ring seals (13) .
24. Use Tooling (E) to drive the bearing into the head.
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25. Install O-ring seal (9) onto the head.
26. Install port plate (8) on the head. It may be necessary to apply a small amount of grease to
the port plate in order to hold the port plate in place during the installation of the head.
27. Turn over head (6). Install Tooling (F) onto the head. Use a suitable lifting device to install
the head onto the travel motor.
28. Install three dowels (7) into the head.
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Caterpillar Cat 345B L Series II Excavator (Prefix ALB) Service Repair Manual (ALB00001 and up).pdf

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