Caterpillar Cat 953C TRACK LOADER (Prefix 2ZN) Service Repair Manual (2ZN00001-01749)

1
Service Repair Manual
Models 953C TRACK LOADER
2
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Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i01924566
Final Drive and Sprocket - Assemble SMCS -
4050-016 4164-016 Assembly Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
A FT-0996 Positioning Group 1
A FT-0957 Adapter Group 1
B 138-7573 Link Bracket 3
D 1V-6405 Puller 1
E 5P-9695 Spreader Bar 1
E Hydraulic Jack 1
F 8H-0700 Puller 1
G 1P-0074 Slide Hammer 1
G 8H-0663 Bearing Puller Attachment 1
G 8B-7554 Bearing Cup Puller Attachment 1
G 7S-7786 Leg 1
3
Illustration 1 g00552581 1. Use a brass bar and
a hammer in order to install thrust plate
(30). Note The oil grooves on the thrust plate
must be upward.
Illustration 2 g00552540 2. Install bearing cap
(31) in the final drive housing.
Illustration 3
g00552533
3. Install gear (28) in the drive housing.
4

1. Install bearing (29) onto gear (28).
2. Install bearing cup (27) (not shown) onto spindle
   (21).
3. Install bearing (24) (not shown) onto shaft (23).

Illustration 4 g00552522 7. Hold shaft (23) in
position while spindle (21) is lowered on the
final drive housing. Use guide bolts (22) in
order to prevent damage to the bearings.

• Illustration 5 g00552582
• Install nineteen bolts (20) in spindle (21).
  Tighten bolts to a torque of 300 40 Nm (220.0
  30.0 lb ft).
• Heat bearing (25) to a maximum temperature of
  120 C (248 F). Do not heat the bearing longer
  than eight hours. Install bearing (25) on spindle
  (21). Put clean oil on the bearing.
• Install seal ring (26) and the toric ring, if the
  Duo-cone seal kit was replaced.

5
Illustration 6
g00552493

1. Install bearing cup (18).
2. Install seal ring (19) and the toric ring, if the
   Duo-cone seal kit was replaced.

Illustration 7
g00552492
13. Install bearing cup (17).
Illustration 8 g00552584 14. Lower sprocket hub
(16) onto the spindle with Tooling (B) and the
lifting straps.
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1. Heat bearing (32) to a maximum temperature of
   120 C (248 F). Do not heat the bearing longer
   than right hours.
2. Coat the shaft with oil. Install bearing (32).

Illustration 9
g00552488
17. Install O-ring (15).
Illustration 10
g00552486

• Install ring gear (14).
• Note This step can be accomplished with a press,
  if a large enough press is available. If a large
  enough press is not available, use plate (13) and
  bolts (12). Tighten the bolts. Alternate 180
  degrees from each other in order to prevent the
  bearing from binding.
• Turn the sprocket in order to seat the bearing by
  applying a gradual load against plate (13).
• Hold the force. Install three bolts (12).
  Alternate 120 degrees from each other. Tighten
  the bolts to a torque of 95 10 Nm (65.0 7.0
  lb ft).
• Remove the force and tighten nine bolts (12) to a
  torque of 300 40 Nm (220.0 30.0 lb ft).

8

• Illustration 11 g00552586
• Install three gears (11) in the carrier assembly
  (7).
• Install cover (9) and six bolts (8).

Illustration 12 g01001600 24. Lower carrier (7)
onto the spindle with Tooling (B). The weight of
the carrier is 79 kg (175.0 lb).
Illustration 13
g00552474
9
25. Install six bolts (6) in carrier (7). Tighten
the bolts to a torque of 100 20 Nm (74.0
15.0 lb ft).
Illustration 14
g00552471
26. Install sun gear (5).
Illustration 15
g00552470
27. Install cover (4) and six bolts (3).
Illustration 16
g00552467
28. Install sprocket segments (2) and (1).
10
End By a. Install the track brakes. Refer to
Disassembly and Assembly, "Track Brake - Install"
for the machine that is being serviced.
Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Wed Dec 22 171656 UTC0800 2021
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Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i02046781
Final Drive and Sprocket - Install SMCS -
4050-012 4164-012 Installation Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Description Qty
A 128-5049 Guide Stud 2

• Illustration 1 g01048414
• Attach a suitable lifting device to final drive
  (16). The approximate weight of the final drive
  is 636 kg (1400 lb). Install the final drive.
• Install the bolts that hold the final drive to
  the frame. Remove the lifting device.

12
Illustration 2
g00552461

1. Install sprocket segments (15).
2. Remove Tooling (A) and install two bolts (14).

Illustration 3
g00552440

1. Install thirteen bolts and sprocket guards.
2. Install remaining bolts (13) that hold the bottom
   of the final drive to the frame.
3. Install the bolt and wire clip (9). Connect
   harness assembly (11).
4. Remove the plugs from the tube assemblies (10)
   and (12). Connect tube assemblies (10) and (12).

13
Illustration 4 g00552439 9. Remove the plugs
from the hose assemblies. Connect hose assembly
(8), (6), (5) and (4). Connect hose assembly (7).

• Illustration 5 g00552436
• Remove the plug and connect hose assembly (3).
• Remove the plugs from hose assemblies (1) and
  (2). Connect hose assemblies (1) and (2).
• End By
• Install the bottom guards. Refer to Disassembly
  and Assembly, "Power Train Guard (Transmission)
  - Remove and Install" for the machine that is
  being serviced.
• Connect the track. Refer to Disassembly and
  Assembly, "Track - Connect" for the machine that
  is being serviced.

Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Wed Dec 22 171752 UTC0800 2021
14
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Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i00951078
Track Brake - Remove SMCS - 4251-011 Removal
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1U-9895 Crossblock 1
A 5F-7366 Screw 1
A 5B-0637 Nut 1
A 5F-7353 Washer 1
B 1U-6400 Puller 1
Start By a. Remove the final drives. Refer to
Disassembly and Assembly, "Final Drive and
Sprocket - Remove" for the machine that is being
serviced. Note The track brakes are identical on
both sides of the machine. Only one side will be
displayed in this story. 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
15
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.
Illustration 1 g00552587 1. Attach a hoist to
track motor (2), as shown. Remove four mounting
bolts (1) and remove track motor (2). The weight
of the track motor is 82 kg (180.0 lb).
Illustration 2
g00552588
16

• Illustration 3 g00552589
• Remove six cover bolts (4). If necessary, remove
  O-ring seal (3).
• Remove brake cover (5) with Tooling (A).

Illustration 4 g00552591 4. Remove bearing cone
(6) with Tooling (B).
Illustration 5 g00552593 5. Loosen six bolts (8)
evenly and release the tension on the springs in
housing (7). Remove bolts (8) and housing (7).
17
Illustration 6
g00552594

1. Remove discs (9) and plates (10).
2. Remove ring (11) from the final drive case only
   if a replacement is necessary.

Illustration 7 g00552596 8. Remove O-ring seals
(12) and (13). If necessary, remove bearing race
(14).
Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Wed Dec 22 171848 UTC0800 2021
18
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Previous Screen
Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i00951080
Track Brake - Disassemble SMCS -
4251-015 Disassembly Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 2P-8312 External Retaining Ring Pliers 1
Start By a. Remove the track brakes. Refer to
Disassembly and Assembly, "Track Brake - Remove"
for the machine that is being serviced. NOTICE C
are 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.
19
Illustration 1
g00552599
Illustration 2
g00552600
1. Place housing (1) in a press, as shown.
Illustration 3 g00552641 2. Apply pressure with
a press and remove retaining ring (2) from the
piston with Tooling (A).
20
Illustration 4
g00552642
3. Remove plate (3) from the housing.

• Illustration 5 g00552643
• Remove two springs (4) from the housing.
• Use a soft hammer in order to push piston (5) out
  of the housing.

Illustration 6 g00552645 6. Remove two seal
assemblies (6) from the piston.
21
Illustration 7
g00552647

1. Remove O-ring (7) from the housing.
2. Inspect the O-rings and the seals for wear or
   damage. If necessary, replace the parts.

Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Wed Dec 22 171943 UTC0800 2021
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Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i00951081
Track Brake - Assemble SMCS - 4251-016 Assembly
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 2P-8312 External Retaining Ring Pliers 1
Illustration 1
g00552647
1. Install O-ring (7) to the housing.
23
Illustration 2 g00552645 2. Install two seal
assemblies (6) on the piston.

• Illustration 3 g00552643
• Carefully push piston (5) into the housing. If
  necessary, use a soft hammer.
• Install two springs (4) in the housing.

Illustration 4
g00552642
5. Install plate (3) to the housing.
24
Illustration 5 g00552641 6. Apply pressure with
a press and install retaining ring (2) with
Tooling (A).
Illustration 6
g00552600
Illustration 7
g00552599
7. Remove the housing (1) from the press. End
By a. Install the track brakes. Refer to
Disassembly and Assembly, "Track Brake - Install"
for the machine that is being serviced.
25
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Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i02046801
Track Brake - Install SMCS - 4251-012 Installation
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1U-9895 Crossblock 1
A 5F-73666 Screw 1
A 5B-0637 Nut 1
A 5F-7353 Washer 1
B 1U-6400 Puller 1
C 6V-6640 Sealant 1
26

• Illustration 1 g00552594
• Apply Tooling (C) on the outside diameter of ring
  (11).
• Put clean SAE 30 oil on each brake disc (9) and
  brake plate (10) prior to assembly.
• Note There are four discs and three plates in
  each of the track brakes.
• Install brake discs (9) and brake plates (10) in
  ring (11). Start and end with a brake disc.

Illustration 2 g00552593 4. Put brake housing
(7) in position on the ring with the holes in the
brake housing in alignment with the holes in the
ring. Install bolts (8).
Illustration 3 g00552598 5. Heat bearing (6).
Install the bearing on the shaft.
27
Illustration 4 g00552596 6. Install bearing cup
(14). Install O-ring seals (12) and (13).
Illustration 5 g00552588 7. Install brake cover
(5) and six bolts (4). Install O-ring seal (3).
Illustration 6 g00552587 8. Install track motor
(2) and mounting bolts (1). End By
28
a. Install the final drive. Refer to Disassembly
and Assembly, "Final Drive and Sprocket -
Install" for the machine that is being serviced.
Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Wed Dec 22 172135 UTC0800 2021
29
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Previous Screen
Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i00951086
Track Drive Motor - Remove SMCS -
4351-010 Removal Procedure Start By a. Remove
the power train guards. Refer to Disassembly and
Assembly, "Power Train Guard (Transmission) -
Remove and Install" for the machine that is being
serviced. 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.
30
Illustration 1
g00552648
1. Disconnect hose (1) and line (2).

• Illustration 2 g00552650
• Disconnect hoses (3), (4) and (5). Disconnect
  line (6).
• Disconnect hoses (7) and (8).

Illustration 3
g00552651

1. Remove four mounting bolts (9).
2. Use a transmission jack in order to remove track
   drive motor (10).

31
Note The track drive motor must be firmly
secured to the jack prior to removal in order to
prevent any personal injury or damage to the
motor.
Copyright 1993 - 2021 Caterpillar Inc. All Rights
Reserved. Private Network For SIS Licensees.
Wed Dec 22 172230 UTC0800 2021
32
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Product TRACK LOADER Model 953C TRACK LOADER
2ZN Configuration 953C Track-Type Loader
Hydrostatic Drive 2ZN00001-01749 (MACHINE)
POWERED BY 3116 Engine
Disassembly and Assembly 953C Track-Type Loader
Power Train Media Number -SENR8407-06 Publication
Date -01/10/2004
Date Updated -11/10/2004
i02089702
Track Drive Motor - Disassemble SMCS -
4351-015 Disassembly Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1U-7564 Hex Wrench (5 mm) 1
B 1P-2853 Spanner Wrench 1
C 1P-1854 Snap Ring Pliers 1
5F-7344 Puller Block 1
5F-7378 Forcing Screw 1
D 1U-6340 Threaded Rod (M6) 1
6V-8225 Nut 1
5P-0537 Hard Washer 1
E 5P-4758 Retaining Ring Pliers As 1
1U-6342 Threaded Rod (M10) 2
2Y-5829 Nut 2
F 8B-7548 Push-Puller Tool Gp 1
8B-7549 Puller Leg 2
3H-0465 Push-Puller Plate 5
G 8T-7684 Key 1
33
H 8B-7551 Bearing Puller Gp 1
Start By a. Remove the track motor. Refer to
Disassembly and Assembly, "Track Drive Motor -
Remove". Note Put identification marks on all
components for installation purposes. NOTICE Car
e 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.
NOTICE Be sure the pump is filled with oil
before any testing or startup. Damage will be
caused if started with no oil.
Illustration 1
g01042894
1. Remove purge valve assembly (1).
34
Illustration 2
g01042893
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.
2. Remove plug (2).
Illustration 3
g01042900
35
Illustration 4
g01042892
Illustration 5
g01042891

1. Remove spring (3) and valve (4).
2. Raise the temperature of housing (8).
3. Use Tooling (G) in order to remove valve (5).
4. Remove valve (6), spring (7), and bolts (9) from
   housing (8).
5. Remove O-ring seals (8A) and O-ring seal (8B).

Illustration 6
g01043022
36
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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.
8. Remove cap (10) and bolts (11) from housing
(12).
Illustration 7
g01043023
9. Remove spring (13).
Illustration 8 g01043024 10. Remove O-ring seals
(14) and O-ring seal (15).
38

• Illustration 9 g01043025
• Measure the distance from the top of adjustment
  screw (16) to the machined part of housing
• (12). Make a note of the dimension in order to
  refer to the dimension during reassembly.
• Loosen locknut (18) until the locknut is flush
  with the top of adjustment screw (16). Turn
  adjustment screw (16) clockwise in order to
  release tension on spring (17).

Illustration 10
g01043073
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.
13. Remove retainer (21), spring (19) and spring
plate (20).
39
Illustration 11
g01043075
14. Remove screws (22) and cover (21).
Illustration 12 g01043076 15. Remove adjustment
screw (23) and screw plug (24).
Illustration 13 g01043077 16. Remove piston
(27), washer (26), and pilot valve (25) from the
housing.
40
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