797F Off-Highway Truck Field Assembly Caterpillar

Parts and Specification Information

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Note: Verify that all parts are shipped and undamaged for preparation of assembly. Missing or damaged parts can be ordered prior to assembly to avoid delays during assembly.

Installation Procedure

Note: Before the tires and the rims are installed, thoroughly clean the wheel studs. Remove any paint, debris, or other contaminants.

Note: If the tires have not been mounted onto the rims, it may be necessary to remove the rims from the rear axle first. Once the tires have been mounted on the rims , proceed with the tire and rim installation procedure.

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Follow the recommended procedure for removal and installation of tires and or wheel assemblies. Ensure that the machine and tire and or wheel assembly are properly supported at all times. Improper procedures that are used to remove and install tires and or wheel assemblies can result in personal injury or death.

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Servicing and changing tires and rims can be dangerous. This work must be done only by trained personnel with correct tools and procedures. If correct procedures are not followed while servicing tires and rims, the assemblies can burst with explosive force and cause serious physical injury or death. Follow carefully the specification information provided by your tire servicing person or dealer.

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Personal injury or death can result from improper lifting or blocking. When a hoist or jack is used to lift any part or component, stand clear of the area. Be sure the hoist or jack has the correct capacity to lift a component. Install blocks or stands before performance of any work under a heavy component. Approximate weights of the components are shown. Clean all surfaces where parts are to be installed.

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Do not attempt to assemble this machine until you read and you understand the assembly instructions. Improper assembly procedures could result in injury or death.

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1. Remove the shipping covers from the wheel studs.

2. Thoroughly clean the wheel studs. Remove any paint, debris, or other contaminants.

3. Remove the grease and the metal burs from the wheel and the mounting area. Clean the mating surfaces free of wax, dirt, debris, paint, and grease.
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   Illustration 8	g06343255

4. Use Tooling (A) to raise the rear end of the machine. Refer to Operation and Maintenance Manual, "Jacking Locations - Rear of the Machine". Refer to Tool Operating Manual, NEHS1328, "Lift Group (Stand - 60 Ton)" for more information on Tooling (A).

   Note: Raise the rear end of the machine enough to provide clearance for the rear tire and rim to be installed.

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   Illustration 9	g06062456
   (1) 147-0170 Bolt (2) 146-1799 Hard Washer (3) 282-6634 Adapter (B) 439-3943 Link Bracket

   Note: Mark the location of the adapter assembly for installation purposes.

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   NOTICE
   Ensure that adapters are clear of the M16 socket head bolts when removing. Adapters can catch on the socket head bolts and damage the wheel flange.

5. Attach Tooling (B) and a suitable lifting device onto both sides of upper rim adapter (3). The weight of upper rim adapter (3) is approximately 323 kg (712 lb). Remove bolts (1) and washers (2). Remove upper rim adapter (3). Retain the hardware.

   Note: Do not remove the bolts for the lower rim adapter until instructed.

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   Illustration 10	g06062467
   (1) 147-0170 Bolt (2) 146-1799 Hard Washer (3) 282-6634 Adapter (B) 439-3943 Link Bracket

   Note: Mark the location of the adapter assembly to ensure proper installation.

6. Ensure that adapters are clear of the M16 socket head bolts when removing. Adapters can catch on the socket head bolts and damage the wheel flange.

   Attach Tooling (B) and a suitable lifting device onto both sides of lower rim adapter (3). The weight of lower rim adapter (3) is approximately 323 kg (712 lb). Remove bolts (1) and washers (2). Remove lower rim adapter (3). Retain the hardware.

   1. Alternatively, Use a suitable fork truck to position Tooling (F) onto lower rim adapter (3). The weight of lower rim adapter (3) is approximately 323 kg (712 lb). Remove bolts (1) and washers (2). Remove lower rim adapter (3). Retain the hardware.
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   Illustration 11	g06343294
   (4) Tire and Rim Assembly

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   NOTICE
   The weight of the tire and rim can vary significantly depending on the tire and rim configuration

7. Use a suitable tire handler to position the inner tire and rim assembly (4) onto the wheel assembly. The weight of tire and rim (4) is approximately 8618 kg (19000 lb).

   Note: The valve stem must face outward.

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   Illustration 12	g03887441
   Outboard side of inner tire and rim assembly (22) 220-7281 Plate (23) 8T-4122 Hard Washer (24) 8T-4779 Bolt

8. Install three plates (22), three hard washers (23), and three bolts (24).
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   Illustration 13	g03845558
   (4) Tire and Rim Assembly (5) 146-1799 Hard Washer (6) 8C-4032 Nut (M36) (C) 443-7797 Tool Gp 443-7801 Tool Gp

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   NOTICE
   Apply Tooling (E) or a light coat of oil onto the wheel studs after the wheel has been fully seated to avoid contamination of the mating surfaces. Anti-seize may be preferred in corrosive environments to make nut removal easier when removing rims. No other anti-seize compound is to be used.

9. Apply Tooling (E) or a light coat of oil onto four of the wheel studs that are equally spaced and approximately 90 degrees apart. Install four nuts (6) and four washers (5) to secure tire and rim (4) onto the wheel.

   Note: Apply a light coat of oil to the faces of the washers.

10. Apply Tooling (E) or a light coat of oil onto the remaining wheel studs.

11. Install the remaining nuts (6) and washers (5). Use Tooling (C) to tighten nuts (6) to a torque of 3100 ± 350 N·m (2286 ± 258 lb ft).

    Note: Apply a light coat of oil to the faces of the washers.

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    Illustration 14	g03845694

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    Illustration 15	g03845698
    (7) 201-6656 Guard (8) 9X-8257 Washer (9) 7X-2555 Bolt (14) 203-4703 Adapter (15) 146-4276 Spud (18) 201-6654 Hose As

12. Install adapter (14), spud (15), hose assembly (18), guard (7), four washers (8), and four bolts (9).
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    Illustration 16	g03887456
    Outboard side of inner tire and rim assembly (25) 197-0620 Guard As (26) 197-0621 Bracket (27) 7X-2552 Bolt (28) 9X-8257 Washer

13. Install four guard assemblies (25), eight brackets (26),16 hard washers (28), and 16 bolts (27).
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    Illustration 17	g06062467
    (1) 147-0170 Bolt (2) 146-1799 Hard Washer (3) 282-6634 Adapter (B) 439-3943 Link Bracket

14. Ensure that adapters are clear of the M16 socket head bolts when installing. Adapters can catch on the socket head bolts and damage the wheel flange.

    Use Tooling (B) and a suitable lifting device to install lower rim adapter (3). The weight of lower rim adapter (3) is approximately 323 kg (712 lb). Install bolts (1) and washers (2). Do not tighten bolts (1) to a final torque now.

    1. Alternatively, Use a suitable fork truck and Tooling (F) to position lower rim adapter (3). The weight of lower rim adapter (3) is approximately 323 kg (712 lb). Install bolts (1) and washers (2). Do not tighten bolts (1) to a final torque now.
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    Illustration 18	g06062456
    (1) 147-0170 Bolt (2) 146-1799 Hard Washer (3) 282-6634 Adapter (B) 439-3943 Link Bracket

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    NOTICE
    Ensure that adapters are clear of the M16 socket head bolts when installing. Adapters can catch on the socket head bolts and damage the wheel flange.

15. Use Tooling (B) and a suitable lifting device to install upper rim adapter (3). The weight of upper rim adapter (3) is approximately 323 kg (712 lb). Install bolts (1) and washers (2). Do not tighten bolts (1) to a final torque now.
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    Illustration 19	g03887448
    (3) 282-6634 Adapter (D) 8C-3226 Bolt 6V-8149 Nut 5P-8245 Hard Washer

16. Install Tooling (D) onto the special studs (AA) on both sides of adapter assembly (3). Tighten Tooling (D) appropriately to equalize the gaps between the upper and lower adapter assemblies.
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    Illustration 20	g03847821
    (1) 147-0170 Bolt (2) 146-1799 Hard Washer (3) 282-6634 Adapter (C) 443-7797 Tool Gp 443-7801 Tool Gp (B) 439-3943 Link Bracket (D) 8C-3226 Bolt 6V-8149 Nut 5P-8245 Hard Washer

17. Once the gaps on each side of the adapters are equalized, use Tooling (C) to tighten all bolts (1) to a torque of 3100 ± 350 N·m (2290 ± 260 lb ft).

18. Remove Tooling (B), Tooling (D), and the lifting devices.
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    Illustration 21	g03889698
    (4) Tire and Rim Assembly

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    NOTICE
    The weight of the tire and rim can vary significantly depending on the tire and rim configuration

19. Use a suitable tire handler to position the outer tire and rim assembly (4) onto the wheel. The weight of tire and rim (4) is approximately 8618 kg (19000 lb).

    Note: The valve stem must face outward.

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    Illustration 22	g03847859
    (4) Tire and Rim Assembly (5) 146-1799 Hard Washer (6) 8C-4032 Nut (C) 443-7797 Tool Gp 443-7801 Tool Gp 159-2833 Socket

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    NOTICE
    Apply Tooling (E) or a light coat of oil onto the wheel studs after the wheel has been fully seated to avoid contamination of the mating surfaces. Anti-seize may be preferred in corrosive environments to make nut removal easier when removing rims. No other anti-seize compound is to be used.

20. Apply Tooling (E) or a light coat of oil onto four of the wheel studs that are equally spaced and approximately 90 degrees apart. Install four nuts (6) and four washers (5) to secure tire and rim (4) onto the wheel.

21. Apply Tooling (E) or a light coat of oil onto the remaining wheel studs.

22. Install the remaining nuts (6) and washers (5). Use Tooling (C) to tighten nuts (6) to a torque of 3100 ± 350 N·m (2286 ± 258 lb ft).

    Note: Apply a light coat of oil to the faces of the washers.

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    Illustration 23	g03848549
    (10) 3W-1100 Spacer (11) 203-4705 Plate (12) 8T-4223 Hard Washer (13) 8T-4910 Bolt (14) 203-4703 Adapter (16) 203-4702 Valve (17) 146-4279 Cap

23. Install adapter (14), valve (16), and cap (17).

24. Install plate (11), two spacers (10), two hard washers (12), and two bolts (13).
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    Illustration 24	g03848857
    (16) 203-4702 Valve (17) 146-4279 Cap (18) 201-6654 Hose As (19) 6V-8990 Elbow (20) 2P-1293 Locknut (21) 6V-9746 O-Ring Seal

25. Install adapter (19) onto hose assembly (18). Install valve (16), cap (17), locknut (20), and two O-rings (21).
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    Illustration 25	g03887441
    Outboard side of outer tire and rim assembly (22) 220-7281 Plate (23) 8T-4122 Hard Washer (24) 8T-4779 Bolt

26. Install three plates (22), three hard washers (23), and three bolts (24).

27. Repeat Step 4 through Step 25 for the opposite side rear wheels.