Caterpillar Cat 325C Excavator (Prefix BTD) Service Repair Manual (BTD00001 and up).pdf

Service Repair Manual
Models
325C and 325C L Excavator

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Product: EXCAVATOR
Model: 325C L EXCAVATOR BTD
Configuration: 325C & 325C L Excavators BTD00001-UP (MACHINE) POWERED BY 3126B Engine
Disassembly and Assembly
325C Excavator Machine Systems
Media Number -RENR5367-11 Publication Date -01/01/2012 Date Updated -17/02/2017
i02344154
Piston Motor (Hydraulic Fan) - Disassemble
SMCS - 1386-015-QP; 5058-015-FM; 5058-015-HFN
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9S-9152 Bearing Puller Gp 1
B
1B-2886 Bolt (1/2 in X 13 X 3 3/4 in) 1
1F-7958 Nut (1/2 in X 13 in) 1
8T-4223 Hard Washer 1
8T-4122 Hard Washer 1
1P-1854 Retaining Ring Pliers 1
C 1P-1857 Retaining Ring Pliers 1
Start By:
A. Remove the piston motor. Refer to Disassembly and Assembly, "Piston Motor (Hydraulic
Fan) - Remove".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the
component should be thoroughly cleaned. This will help to prevent dirt from entering the internal
mechanism.
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Illustration 1 g00881939
1. Remove key (1) from shaft (2) .
2. Remove bolts (4) that secure that secure cover (5) to housing (3) .
3. Remove port plate (6) and O-ring seal (7) from cover (5) .
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4. Remove bearing cup (8) from cover (5) .
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
5. Remove plug (11) , sleeve (10) , and valve assembly (9) from cover (5) .
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6. Remove bearing cone (12) from shaft (2) .
Note: Bearing cone (12) is a slip fit.
7. Remove shim (13) from shaft (2) .
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8. Remove rotating group (14) and shaft (2) from housing (3) .
9. Install rotating group (14) and Tooling (A) in a suitable press. Install a 6 mm (0.2 inch) bolt
on the end of shaft (2) .
Note: Shaft (2) must be pressed away from the sleeve (15) .
Note: Shaft (2) must be supported in order to prevent damage.
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10. Remove sleeve (15) from rotating group (14) .
11. Install shaft (2) and Tooling (A) into a suitable press.
12. Remove bearing cone (16) from shaft (2) .
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13. Remove swashplate (17) from the top of rotating group (14) .
Note: Take note of the holes in the top of swashplate (17) .
14. Remove pistons and plate (18) from barrel assembly (19) .
15. Remove guide (20) from barrel assembly (19) .
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16. Install Tooling (B) into barrel assembly (19) .
17. Tighten Tooling (B) in order to compress the spring in the barrel assembly.
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
18. Use Tooling (B) in order to remove retaining ring (21) from barrel assembly.
19. Slowly release the pressure on the spring.
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20. Remove retaining ring (21) , spring (22) , washer (23) , and pins (24) from the barrel.
21. Use Tooling (C) in order to remove retaining ring (25) from housing (3) .
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22. Remove seal (26) and bearing cup (27) from the housing.
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Thu Jun 25 18:23:45 UTC+0800 2020
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325C & 325C L Excavators BTD00001-UP (MACHINE) POWERED BY 3126B E...
2020/6/25

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Product: EXCAVATOR
i02344155
Piston Motor (Hydraulic Fan) - Assemble
SMCS - 1386-016-QP; 5058-016-FM; 5058-016-HFN
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9S-9152 Bearing Puller Gp 1
C 1P-1857 Retaining Ring Pliers 1
D 1P-0510 Driver Gp 1
E 1U-6396 O-Ring Assembly Compound 1
F 1P-1854 Retaining Ring Pliers 1
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. A reconditioning procedure should not be degraded
because of a low cost component such as an O-ring or a gasket. Use Tooling (E) during the
assembly procedure.
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: Apply a light film of SAE 10W oil to all components before assembly.
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1. Use Tooling (D) in order to install bearing cup (27) .
Note: Bearing cup (27) must be fully seated. Bearing cup (27) must be properly seated in
order for the motor to assemble properly.
2. Rotate housing (3) . Use Tooling (D) in order to install seal (26) .
3. Use Tooling (C) in order to install retaining ring (25) .
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4. Install shaft (2) and bearing cone (16) in a suitable press. Press bearing cone (16) onto shaft
(2) .
Note: Bearing cone (16) must be fully seated. Bearing cone (16) must be properly seated in
order for the motor to assemble properly.
5. Assemble the rotating group in the following manner:
a. Install pins (24) in the top of barrel assembly (19) .
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b. Rotate barrel assembly (19) . Install washer (23) and spring (22) . Place retaining ring
(21) on top of spring (22) .
Note: Do not attempt to install retaining ring (21) .
c. Rotate the barrel assembly. Retain the contents of the barrel. Position guide (20) on
pins (24) .
d. Install shaft (2) and the bearing through the barrel assembly.
Note: The shaft will align the barrel assembly.
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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
e. Install Tooling (A) and barrel assembly (19) into a suitable press.
f. Compress the spring. Use Tooling (F) in order to install retaining ring (21) .
g. Slowly release the pressure on barrel assembly (19) .
h. Remove the shaft from barrel assembly (19) .
6. Install pistons and plate (18) into barrel assembly (19) .
7. Install swashplate (17) onto rotating group (14) .
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Note: Barrel assembly (19) is rotating group (14) upon the installation of the pistons.
Note: Place identifying marks on swashplate (17) in order to locate two holes on the top of
the swashplate.
8. Install shaft (2) into rotating group (14) .
Note: Splines in shaft (2) must engage splines in rotating group (14) .
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9. Align swashplate (17) with housing (3) .
Note: The holes on the top of swashplate (17) must engage the dowels in housing (3) .
10. Install rotating group (14) into housing (3) .
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11. Raise the temperature of sleeve (15) . Install sleeve (15) onto shaft (2) .
12. Install shim (13) onto shaft (2) .
13. Install bearing cone (12) onto shaft (2) .
Note: Bearing cone (12) is a slip fit.
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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
14. Install valve assembly (9) , sleeve (10) , and plug (11) into cover (5) .
15. Use Tooling (A) to install bearing cup (8) into cover (5) .
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16. Install port plate (6) onto cover (5) .
Note: Take note of the slot in the reverse side of port plate (6) . The slot will receive the
dowel in cover (5) .
17. Install O-ring seal (7) on cover (5) .
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18. Install cover (5) onto housing (3) .
19. Secure cover (5) with bolts (4) .
20. Install key (1) into shaft (2) .
End By: Install the piston motor. Refer to Disassembly and Assembly, "Piston Motor (Hydraulic
Fan) - Install ".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Thu Jun 25 18:24:41 UTC+0800 2020
11/11
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Product: EXCAVATOR
i02344156
Piston Motor (Hydraulic Fan) - Install
SMCS - 1386-012-QP; 5058-012-FM
Installation Procedure
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
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1. Position piston motor (23) into the bracket. Secure the piston motor with bolts (22) .
2. Install adapter (21) onto the piston motor.
3. Install nut (20) , fan blade (19) , and bolts (18) .
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4. Attach a suitable lifting device to the piston motor and fan assembly (17) . The weight of the
piston motor and fan assembly (17) is approximately 29 kg (65 lb). Position the piston
motor and fan assembly (17) . Install bolts (16) .
5. Install hose assemblies (15) .
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Caterpillar Cat 325C Excavator (Prefix BTD) Service Repair Manual (BTD00001 and up).pdf

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Caterpillar Cat 325C Excavator (Prefix BTD) Service Repair Manual (BTD00001 and up).pdf