Caterpillar Cat 973K Track Loader (Prefix MKL) Service Repair Manual (MKL00001 and up)

1
Service Repair Manual
Models 973 and 973K Track Loader
2
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Product TRACK LOADER Model 973 TRACK LOADER
MKL Configuration 973K Track-Type Loader
MKL00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly 973K Track-Type Loader
Power Train Media Number -M0082572-01 Publication
Date -01/03/2018
Date Updated -12/03/2018
i02935174
Final Drive and Sprocket - Disassemble SMCS -
4050-015 4164-015 Disassembly Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A 1P-2420 Transmission Repair Stand 1
B 439-3940 Bracket As 2
C 1P-0820 Hydraulic Puller 1
C 3H-0465 Push-Puller Plate 4
C 5F-7369 Puller Leg 2
C 350-7768 Electric Hydraulic Pump Gp 1
C 4C-5660 Threaded Adapter 2
C 1P-0527 Plate 1
D 439-3939 Link Bracket As 3
E 1P-2322 Combination Puller 1
E 1P-0520 Driver Gp 1
F 1P-0074 Slide Hammer Puller Gp 1
F 4C-5655 Threaded Adapter 1
G 1P-2322 Combination Puller 1
G 1P-0510 Driver Gp 1
3

• Start By
• Remove the final drive and the sprocket.
• Remove the track brakes.

Illustration 1
g01291262

• Illustration 2 g01361870
• Use a suitable lifting device to position the
  final drive onto Tooling (A). The weight of the
  final drive is approximately 748 kg (1650 lb).
• Remove bolts (1) and sprocket segment (2). Repeat
  for all segments.

4
Illustration 3
g01363258
3. Remove bolts (3) and cover (4).
Illustration 4
g01363268
4. Remove sun gear (5).
Illustration 5 g01363270 5. Attach Tooling (B)
and a suitable lifting device to housing assembly
(6). The weight of housing assembly (6) is
approximately 136 kg (300 lb). Remove bolts (7).
Remove housing assembly (6).
5
Illustration 6 g01363273 6. Reposition housing
assembly (6) and remove bolts (8).
Illustration 7
g01363274
7. Use bolts (8) to remove plate (9).
Illustration 8 g01363277 8. Use a suitable pry
bar to remove the gear and shaft assembly (10).
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• Illustration 9 g01297364
• Use a suitable press to remove shaft (10) from
  bearing cone (11) and gear (12).
• Place shaft (10) and the bearing cone in a
  position to remove the remaining bearing cone
  from the other end of shaft (10).

Illustration 10
g01297505
11. Remove bearing cups (13).
8
Illustration 11
g01455797
12. Remove bolts (14) and retainer (15).
Illustration 12 g01455801 13. Use a suitable pry
bar to loosen ring gear (16) on the spindle.
Attach a suitable lifting device to the ring
gear (16). The weight of ring gear (16) is
approximately 68 kg (150 lb). Remove ring gear
(16).
9

• Illustration 13 g01455815
• Use Tooling (C) to remove bearing cone (17) and
  hub (18).
• Note Maximum pressure must not exceed 39300 kPa
  (5700 psi) or damage to the Tooling or the
  component could result.
• Remove bearing cone (17).

Illustration 14 g01455849 16. Attach Tooling (D)
and a suitable lifting device to hub (18). The
weight of hub (18) is approximately 108 kg (240
lb). Remove hub (18).
10
Illustration 15 g01455850 17. Remove Duo-Cone
seal (19) and bearing cups (20) from hub (18).
Illustration 16
g01455867
Illustration 17
g01455875
11
Illustration 18
g01455878

1. Remove Duo-Cone seal (21).
2. Use Tooling (E) to remove bearing cone (22).
3. Attach Tooling (D) and a suitable lifting device
   to hub assembly (24). The weight of hub assembly
   (24) is approximately 136 kg (300 lb). Remove
   bolts (23), hub assembly (24), and O-ring seal
   (26).
4. Remove bearing race (25) from hub assembly (24).

Illustration 19
g01455882
12

• Illustration 20 g01455894
• Attach Tooling (B) and a suitable lifting device
  to gear (27). The weight of gear (27) is
  approximately 43 kg (95 lb). Remove gear (27).
• Use Tooling (E) to remove bearing (28) from gear
  (27).

Illustration 21
g01455898
24. Remove thrust plate (29).
Illustration 22
g01455900
13
25. Attach Tooling (D) and a suitable lifting
device to housing assembly (30). The weight of
housing assembly (30) is approximately 138 kg
(305 lb). Position housing assembly (30) onto
Tooling (A).
Illustration 23
g01455901
26. Remove bolts (32) and plate (31).
Illustration 24 g01455902 27. Use Tooling (F) to
remove gear assembly (33) and upper bearing cup
(34).
14
Illustration 25 g01455903 28. Use Tooling (G) to
remove bearing cones (35).
Illustration 26
g01455904
29. Remove lower bearing cup (36).
Copyright 1993 - 2021 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Sat Nov 13 231606 UTC0800 2021
15
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Product TRACK LOADER Model 973 TRACK LOADER
MKL Configuration 973K Track-Type Loader
MKL00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly 973K Track-Type Loader
Power Train Media Number -M0082572-01 Publication
Date -01/03/2018
Date Updated -12/03/2018
i07140767
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
B 439-3940 Bracket As 2
C 8T-5096 Tool Gp 1
D 439-3939 Link Bracket As 3
H - Loctite518 -
Note Check the O-ring seals, the gaskets, and
the seals for wear or for damage. Replace the
components, if necessary.
16
Illustration 1 g01455904 1. Lower the
temperature of bearing cup (36) and install lower
bearing cup (36).
Illustration 2 g01455962 2. Raise the
temperature of bearing cones (35) and install
bearing cones (35).

• Illustration 3 g01455965
• Install gear assembly (33). Lower the temperature
  of upper bearing cup (34) and install bearing
  cup (34).
• Install plate (31) and bolts (32).
• Note Rolling torque of shaft not to exceed 1.13
  Nm (10 lb in). If rolling torque exceeds limit,
  install shim. Do not exceed 3 shims.End play must
  not exceed 0.5 mm (0.020 inch) (C).

17
Illustration 4
g01455900

• Illustration 5 g01455898
• Attach Tooling (D) and a suitable lifting device
  to housing assembly (30). The weight of housing
  assembly (30) is approximately 138 kg (305 lb).
• Reposition housing assembly (30) onto Tooling
  (A). Apply Tooling (H) to thrust plate (29).
  Install thrust plate (29).

Illustration 6
g01455988
18
7. Raise the temperature of bearing (28) and
install bearing (28) onto gear (27). Attach
Tooling (B) and a suitable lifting device to gear
(27). The weight of gear (27) is approximately 43
kg (95 lb). Install gear (27).
Illustration 7
g01455878

• Illustration 8 g01455991
• Lower the temperature of bearing race (25) and
  install bearing race (25) into hub assembly
  (24).
• Attach Tooling (D) and a suitable lifting device
  to hub assembly (24). The weight of hub assembly
  (24) is approximately 136 kg (300 lb). Install
  O-ring seal (26), hub assembly (24), and bolts
  (23). Tighten bolts (23) to a torque of 300 40
  Nm (221 30 lb ft).
• Raise the temperature of bearing cone (22) and
  install bearing cone (22).
• Install Duo-Cone seal (21). Refer to Disassembly
  and Assembly, "Duo-Cone Conventional Seals -
  Install".

19
Illustration 9 g01455850 12. Lower the
temperature of bearing cups (20) and install
bearing cups (20). Install Duo-Cone seal (19)
into hub (18). Refer to Disassembly and Assembly,
"Duo-Cone Conventional Seals - Install".
Illustration 10 g01455849 13. Attach Tooling (D)
and a suitable lifting device to hub (18). The
weight of hub (18) is approximately 108 kg (240
lb). Install hub (18).
Illustration 11 g01455994 14. Raise the
temperature of bearing cone (17) and install
bearing cone (17).
20
Illustration 12 g01455801 15. Attach a suitable
lifting device to ring gear (16). The weight of
ring gear (16) is approximately 68 kg (150 lb).
Install ring gear (16).
Illustration 13 g01456000 16. Position retainer
(15) and install bolts (14). To properly seat
bearing cone (17), continually rotate hub (18).
Tighten all bolts (14) in a star pattern. Tighten
bolts (14) to a torque of 300 40 Nm (221 30
lb ft).
21
Illustration 14 g01297505 17. Lower the
temperature of bearing cups (13) and install
bearing cups (13).

• Illustration 15 g01363846
• Install shaft (10). Raise the temperature of
  bearing cone (11) and install bearing cone (11).
  Install gear (12). Raise the temperature of
  remaining bearing cone (11) and install bearing
  cone (11). Repeat for the remaining gear and
  shaft assemblies (12).
• Position plate (9) and install bolts (8).

22
Illustration 16 g01363270 20. Attach Tooling (B)
and a suitable lifting device to position housing
assembly (6). The weight of housing assembly (6)
is approximately 136 kg (300 lb). Install bolts
(7). Tighten bolts (7) to a torque of 300 40
Nm (221 30 lb ft).
Illustration 17
g01363268
21. Install sun gear (5).
Illustration 18 g01363258 22. Apply Tooling (H)
to cover (4). Position cover (4) and install
bolts (3).
23
Illustration 19 g01291250 23. Lubricate bolts
(1) with clean oil. Position sprocket segments
(2) and install bolts (1). Tighten bolts (1) to
a torque of 300 55 Nm (221 41 lb ft). Torque
bolts an extra 1/3 turn.

• Illustration 20 g01291262
• Attach a suitable lifting device to the final
  drive. The weight of the final drive is
  approximately 748 kg (1650 lb). Remove the final
  drive from Tooling (A).
• End By
• Install the track brakes.
• Install the final drive and the sprocket.

Copyright 1993 - 2021 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Sat Nov 13 231701 UTC0800 2021
24
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Previous Screen
Product TRACK LOADER Model 973 TRACK LOADER
MKL Configuration 973K Track-Type Loader
MKL00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly 973K Track-Type Loader
Power Train Media Number -M0082572-01 Publication
Date -01/03/2018
Date Updated -12/03/2018
i07162640
Track Brake - Remove and Install SMCS -
4251-010 Removal Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A - Guide Studs M12 x 1.75 by 290mm 2
Start By a. Remove the track drive motor.
Illustration 1 g01457893 1. Disconnect hose
assembly (1). Remove two bolts (2).
25
Illustration 2 g01457894 2. Install Tooling (A)
to remove track brake (3). Use two people to
remove track brake (3). The weight of track
brake (3) is approximately 36 kg (80 lb). Remove
the remaining bolts (2) and track brake (3).
Illustration 3 g01457895 3. Remove shaft (7),
friction discs (5), plates (6), and ring gear (4).
Illustration 4 g01458025 4. Remove O-ring seals
(8) from ring gear (4).
26
Installation Procedure Table 2
Required Tools Required Tools Required Tools Required Tools
Tool Part Number Part Description Qty
A - Guide Studs M12 x 1.75 by 290mm 2
Illustration 5
g01458025
1. Install O-ring seals (8) onto ring gear (4).
Illustration 6
g01458072
27

• Illustration 7 g01457895
• Install Tooling (A) to install ring gear (4) and
  the track brake. Install ring gear (4) and shaft
  (7).
• Note Make sure that ring gear (4) is installed
  against the case.
• Prior to assembly, dip friction disc (5) and
  plates (6) in SAE 30w oil. Install friction disc
  (5) and plates (6).

• Illustration 8 g01457894
• Use two people to install track brake (3). The
  weight of track brake (3) is approximately 36 kg
  (80 lb). Position track brake (3) and install
  bolts (2).
• Remove Tooling (A).

28

• Illustration 9 g01457893
• Install the remaining bolts (2). Connect hose
  assembly (1).
• End By
• a. Install the track drive motor.

Copyright 1993 - 2021 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Sat Nov 13 231757 UTC0800 2021
29
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Previous Screen
Product TRACK LOADER Model 973 TRACK LOADER
MKL Configuration 973K Track-Type Loader
MKL00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly 973K Track-Type Loader
Power Train Media Number -M0082572-01 Publication
Date -01/03/2018
Date Updated -12/03/2018
i02938344
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 6V-4035 Sleeve 1
B 170-5409 Driver 1
C 1P-0520 Driver Gp 1
Start By a. Remove the track brake.
Illustration 1
g01333903
30
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.

1. Use two people to position housing (1), Tooling
   (A) and Tooling (B) into a suitable press. The
   weight of housing (1) is approximately 36 kg (80
   lb).
2. Use a suitable press, Tooling (A), and Tooling
   (B) to compress the springs. Remove retaining
   ring (2). Remove Tooling (A).

Illustration 2
g01333953
3. Remove plate (3).
Illustration 3
g01457814
31
4. Remove two disc springs (4). Use two people to
remove Tooling (B) and housing (1) from the
press. The weight of housing (1) is approximately
29 kg (65 lb).
Illustration 4 g01333975 5. Use Tooling (C) and
a suitable press to remove piston (5).
Illustration 5
g01333983
6. Remove seals (6).
Copyright 1993 - 2021 Caterpillar Inc. All
Rights Reserved. Private Network For SIS
Licensees.
Sat Nov 13 231853 UTC0800 2021
32
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Product TRACK LOADER Model 973 TRACK LOADER
MKL Configuration 973K Track-Type Loader
MKL00001-UP (MACHINE) POWERED BY C9.3 Engine
Disassembly and Assembly 973K Track-Type Loader
Power Train Media Number -M0082572-01 Publication
Date -01/03/2018
Date Updated -12/03/2018
i07140778
Track Brake - Assemble SMCS - 4251-016 Assembly
Procedure Table 1
Required Tools Required Tools Required Tools Required Tools
Tools Part Number Part Description Qty
A 6V-4035 Sleeve 1
B 170-5409 Driver 1
C 1P-0520 Driver Gp 1
Note Check seals and springs for wear or damage.
Replace the components, if necessary.
Illustration 1
g01333983
1. Install seals (6).
34
Note Lightly lubricate seals with SAE 30 Oil.
Illustration 2 g01334004 2. Use Tooling (C) and
a suitable press to install piston (5).

• Illustration 3 g01457814
• Use two people to place housing (1) and Tooling
  (B) into a suitable press. The weight of housing
  (1) is approximately 29 kg (65 lb).
• Install two disc springs (4).
• Note Lightly lubricate springs with SAE 30 Oil.

35
Illustration 4
g01333953
5. Install plate (3).
Illustration 5
g01333903
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.

• Use Tooling (A), Tooling (B), and a suitable
  press to install retaining ring (2).
• Install retaining ring (2).
• Remove Tooling (A). Use two people to remove
  housing (1) from the suitable press. The weight
  of the housing (1) is approximately 36 kg (80
  lb).
• End By
• a. Install the track brake.

36
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manual if required, please enter the following
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