797F Tier 4 Off-Highway Truck Field Assembly Caterpillar

Parts and Specification Information

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

Start By:

1. Install the rear tires and rims.

Note: Before installing the truck body and canopy, remove the work at height handrails.

Show/hide table

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.

Show/hide table

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.

Note: Remove all protective shipping covers, flanges, plugs, caps, clamps, cable straps, and material.

Note: Clean mounting and contact surfaces for major component installation free of wax, dirt, debris, paint, and grease.

Note: If necessary, chase unprotected threaded holes with an appropriately sized tap to remove paint, rust, or other debris.

Note: Unless otherwise specified, all torque requirements are Standard Torque values. Refer to the "General Information" section in this document for the correct torque values.

Note: Before tightening the cable straps (mounting hardware), remove the slack from the harness assembly(s) and allow adequate strain relief.

Reference: Special Instruction, REHS1841, "General Welding Procedures".

Films Install

Note: Clean all surfaces with isopropyl alcohol. Thoroughly dry the surfaces before applying the film.

Note: After applying the film, ensure that the film is free of air bubbles.

Note: If no dimension is given, center the films in the space that is available.

Show/hide table

Illustration 1	g03863411
(41) 295-0537 Film

1. Clean the contact surface with isopropyl alcohol. Thoroughly dry the surface before applying the film. Apply film (41) to the front of the canopy.
   Show/hide table

   Illustration 2	g03863413
   (42) 332-5861 Film (A) 0 ± 3 mm (0.00000 ± 0.12 inch)

2. Clean the contact surface with isopropyl alcohol. Thoroughly dry the surface before applying the film. Apply film (42) to the right side of the body.
   Show/hide table

   Illustration 3	g03863414
   (43) 332-5860 Film (A) 0 ± 3 mm (0.00000 ± 0.12 inch)

3. Clean the contact surface with isopropyl alcohol. Thoroughly dry the surface before applying the film. Apply film (43) to the left side of the body.
   Show/hide table

   Illustration 4	g03863417
   (44) 252-2156 Film

4. Clean the surfaces with isopropyl alcohol. Thoroughly dry the surfaces before applying the film. Apply films (44) to the sides of the body. Place eight films (44) to the right of each lifting location.

Truck Body Install

Show/hide table

Illustration 5	g03859399

1. Clean the pin bores and the mating surfaces on the truck body free of wax, dirt, debris, paint, and grease.
   Show/hide table

   Illustration 6	g03859400

2. Clean the pin bores and the mating surfaces on the chassis and hoist cylinders free of wax, dirt, debris, paint, and grease.
   Show/hide table

   Illustration 7	g03859401

   Show/hide table

   Illustration 8	g03860102
   (2) 295-6917 Pin As (7) 295-4144 Pin As

3. Clean the contact and mating surfaces of two pin assemblies (2) and two pin assemblies (7) free of wax, dirt, debris, paint, and grease.
   Show/hide table

   Illustration 9	g03860461
   (1) 438-6000 Body and Canopy As (A) 376-4554 Pin As

4. Use Tooling (A) and a suitable lifting device to position truck body and canopy assembly (1) onto the chassis. The weight of truck body and canopy assembly (1) is approximately 51256 kg (113000 lb) with the liners and 44134 kg (97300 lb) without the liners.
   Show/hide table

   Illustration 10	g03860573

   Show/hide table

   Illustration 11	g03860477
   (2) 295-6917 Pin As (3) 154-1808 Plate

   Note: Pin hardware blocks are installed on both sides of the pivot brackets. The pin hardware blocks allow the pivot flag pin to be installed from either side of the pivot bracket. The pivot pin can be installed from the outboard side in or from the inboard side out. For illustrative purposes, the pin is being installed from the outboard side in.

   Note: Center the truck body on the chassis by installing shim plates (3) , as required, on the body pivot pins between the body frame rails and the outside surface of the chassis frame rails only. Do not install the shim plates on the inboard sides of the chassis frame rails.

5. Ensure that the pin bores are aligned. Apply Tooling (B) onto pivot pin assembly (2). Use a suitable lifting device to position one pivot pin assembly (2) into the pin bore. The weight of one pivot pin assembly (2) is approximately 57 kg (125 lb). Position the required number of shim plates (3) to center the truck body on the chassis and install one pivot pin assembly (2). Repeat this step for the opposite side of the truck body.
   Show/hide table

   Illustration 12	g03860479
   (4) 295-6901 Plate (5) 9X-8257 Washer (6) 7X-2553 Bolt

6. install two retainer plates (4), eight hard washers (5), and eight bolts (6). Repeat this step for the remaining pin assembly on the opposite side of the truck body.
   Show/hide table

   Illustration 13	g03861510

   Show/hide table

   Illustration 14	g03861521
   (7) 295-4144 Pin As (9) 151-0888 Spacer

7. Position the hoist cylinder to align the pin bores. Apply Tooling (B) onto pin assembly (7). Install pin assembly (7) and two spacers (9). The weight of pin assembly (7) is approximately 47 kg (104 lb)
   Show/hide table

   Illustration 15	g03860618
   (5) 9X-8257 Washer (8) 295-6881 Plate (10) 8T-4193 Bolt

8. Install two plates (8), eight hard washers (5), and eight bolts (10). Repeat Step 7 and Step 8 for the hoist cylinder pin assembly on the opposite side of the truck body.

Mud Guards Install

Note: The mud guards can be installed at ground level.

Show/hide table

Illustration 16	g06358349
(12) 480-8667 Mud Flap (14) 5T-7352 Strip (15) 8T-4121 Hard Washer (16) 8T-4196 Bolt (17) 6V-7744 Nut

1. Use two people to position mud flap (12). The weight of mud flap (12) is approximately 22 kg (49 lb). Install strip (14), twelve bolts (16), twenty-four washers (15), and twelve nuts (17).

Retaining Cable Install

Note: The retaining cables can be installed at ground level.

Show/hide table

Illustration 17	g03862029
(18) 219-6071 Pin Kit (19) 219-5893 Clevis (20) 336-0743 Cable As

1. Install two cable assemblies (20), two clevises (19), and two pin kits (18).

Rock Ejector install

Show/hide table

Illustration 18	g03862202
(21) 195-5952 Plate As

1. Attach a string and a plumb bob to the center of one plate assembly (21) for the mounting pin of rock ejector. Use a suitable fork truck to position one plate assembly (21) onto the bottom of the truck body. The weight of one plate assembly (21) is approximately 103 kg (227 lb). Center the string between the two rear tires. Once the string is centered, mark the location of plate assembly (21) on the truck body.
   Show/hide table

   Illustration 19	g03862366

   Show/hide table

   Illustration 20	g03862372
   (21) 195-5952 Plate As

2. Clean the contact and mating surfaces of plate assembly (21) and the truck body free of wax, dirt, debris, paint, and grease.
   Show/hide table

   Illustration 21	g03862202

   Show/hide table

   Illustration 22	g03862514
   (21) 195-5952 Plate As (W1) 8 mm (0.32 inch) Fillet weld with 1.5 mm (0.06 inch) Root penetration

3. Position plate assembly (21) onto the bottom of the body and tack weld plate assembly (21) onto the truck body. The weight of one plate assembly (21) is approximately 103 kg (227 lb).

4. Weld plate assembly (21). Weld around the entire perimeter of plate assembly (21) in order to secure plate assembly (21) to the truck body. Use a grinder in order to remove any slag or debris from the affected area. Repaint the welded area.
   Show/hide table

   Illustration 23	g03862544

   Show/hide table

   Illustration 24	g03862545
   (21) 195-5952 Plate As (22) 175-4935 Ejector (23) 3B-4647 Cotter Pin (24) 185-6715 Pin (25) 3D-0404 Washer

5. Use a suitable fork lift or a suitable lifting device to position ejector (22) to plate assembly (21). The weight of ejector (22) is approximately 112 kg (247 lb).

6. Install one pin (24), one washer (25), and two cotter pins (23).

7. 1 and Step 6 for the opposite side of the truck body.

Rocker Install

Show/hide table

Illustration 25	g03862602
(32) 507-1577 Shoe (33) 8T-4192 Bolt (34) 149-1926 Plate (35) 518-9364 Pin (36) 236-5558 Plate As

1. Install shoe (32) onto plate assembly (36). Lubricate pin (35) with Tooling (B). install pin (35), two plates (34), and four bolts (33).
   Show/hide table

   Illustration 26	g03862604
   (27) 7D-1649 Hard Washer (28) 8T-4184 Bolt (29) 147-5075 Pad As (30) 147-5073 Shim 2 mm (0.08 inch) (31) 147-5072 Plate 8 mm (0.32 inch) (56) Rocker Sub Assembly

2. Install two shims (30) and one plate (31) onto rocker subassembly (56). Install one pad assembly (29), three hard washers (27), and three bolts (28).

   Note: Plate (31) should be used in place of four shims (30). Use plate (31) when the gap between the truck body and pad assembly (29) is larger than 8 mm (0.32 inch).

3. Repeat Step 1 through Step 2 for the remaining rocker assembly.

4. Raise the truck body and connect the truck body retaining cables. Refer to Operation and Maintenance Manual, "Cable (Truck Body Retaining)".
   Show/hide table

   Illustration 27	g03862820

   Show/hide table

   Illustration 28	g03862859
   (56) Rocker Sub Assembly

5. Use a suitable lifting device to position one rocker subassembly (56) onto the crossbeam of the truck frame. The weight of rocker assembly (56) is approximately 150 kg (330 lb).
   Show/hide table

   Illustration 29	g03888685
   (56) Rocker Sub Assembly (A) 1550 mm (61 inch)

6. Disconnect the truck body retaining cables and Lower the body. Refer to Operation and Maintenance Manual, "Cable (Truck Body Retaining)".

7. Locate rocker subassembly (56) on the crossbeam according to Dimension (A) from the centerline of the chassis. Also, position rocker subassembly (56) as far rearward on the crossbeam as possible without welding on the radius of the crossbeam.

   Note: Dimension (A) from the centerline of the chassis to the center of the rocker assembly pin is 1550 mm (61 inch)

8. Tack weld rocker subassembly (56) onto the crossbeam of the truck frame.

9. Repeat Step 5 through Step 8 for the remaining rocker subassembly.

10. Raise the truck body and connect the truck body retaining cables. Refer to Operation and Maintenance Manual, "Cable (Truck Body Retaining)".
    Show/hide table

    Illustration 30	g03863047

    Show/hide table

    Illustration 31	g03863108
    Grind as needed for clearance (56) Rocker Sub Assembly (W2) 25 mm (1.0 inch) Fillet weld with 1.5 mm (0.06 inch) Root penetration (W3) 10 x 35 mm (0.4 x 1.4 inch) Fillet weld with 14 mm (0.6 inch) Bevel Groove weld (W4) 10 x 27 mm (0.4 x 1.1 inch) Fillet weld with 14 mm (0.6 inch) Bevel Groove weld (N1) Grind both corners (N2) No weld from A to B

11. Weld rocker subassembly (56) to the crossbeam.

    Note: Avoid starting and stopping the weld on the corners.

    Show/hide table

    Illustration 32	g01652994

    Show/hide table

    Illustration 33	g01652998

12. Create additional fillet welds in order to provide a tapered transition between the original fillet weld and the main beam. Use a grinder in order to blend the additional welding area.

    Note: Perform the additional welding on the two corners of the rocker assembly that are located toward the outside edge of the chassis.

    Show/hide table

    Illustration 34	g03863355
    (56) Rocker Sub Assembly

13. Use a grinder to blend any weld that is located by the drain opening in rocker assembly (56).

    Note: Ensure that the drain opening is free of obstructions.

    Show/hide table

    Illustration 35	g01653036

14. Check for interference after finish welding and grinding of rocker subassemblies (56). Ensure that there is no interference between the upper rocker pad and the fillet weld on the base. If interference occurs, use a grinder to remove the excess material. Paint all affected weld areas.

15. Repeat Step 5 through Step 15 for the opposite side.

Body Pad Install

Show/hide table

Illustration 36	g03891843
(30) 147-5073 Shim 2 mm (0.08 inch) (37) 8T-4244 Nut (38) 173-5403 Pad As (39) 7D-1649 Hard Washer (40) 8T-4910 Bolt

1. Raise the truck body to the RAISED position and connect the truck body retaining cables. Refer to Operation and Maintenance Manual, "Cable (Truck Body Retaining)".

2. Loosely install all ten pad assemblies (38) using 30 bolts (40), 30 hard washers (39), and 30 nuts (37) to the body rails (no shims, and bolts loose).

3. Lower the body slowly until the first pad assembly fully contacts the rails. This pad assembly establishes neutral body down position and requires no additional shims.

   Note: Raise the truck body and connect the truck body retaining cables. Refer to Operation and Maintenance Manual, "Cable (Truck Body Retaining)". Or, safely block the body in position while the shims are installed.

4. As required, assemble shims (30) on the remaining pad assemblies (38) to minimize the gap between the frame rail and the body rail and maximize the contact area of pad assemblies. Use the shims to fill the gaps.

   Note: When lowering the body to establish the neutral down position, if the body landing pads contact the rocker assemblies before the body pads contact the frame rails, then add required shims to the body pad with closest clearance to minimize the gap. With this neutral position established, continue to add shims to the remaining body rail mounting pads.

5. Remove the safety device or blocks and lower the body to the DOWN position to visually check for proper shimming along the frame rails.

   Note: Check for even contact of mounting pads to frame rails, the following paint/grease transfer procedure can be used. Paint/grease the chassis frame rail body pad contact areas. While the paint/grease is wet, lower the body. Raise the body and examine the contact pattern transferred to the body pads. If needed, reshim the pads one pad at a time to achieve the most complete contact pattern possible.

6. Refer to the rocker Install section for welding rocker assemblies to position.

7. With the body in the DOWN position, finish shim the rocker assemblies.

8. Install one 8 mm (0.32 inch) shim and two 2 mm (0.08 inch) shims between pad and rocker, tighten the bolts ( this will give field adjustment for pedestals as the body pads compress during operation).

9. Place two 2 mm (0.08 inch) shims on top of the rocker pads ( this will establish initial running clearance).

10. Remove safety device or blocks. Raise and lower the body in order to ensure proper alignment and that all mounted pad assemblies have even contact with the frame.

11. At this point, remove the two shims setting on top of rocker pads from the right hand and left-hand rocker shoe and pad assemblies. Removing the shim ensure minimal load transferring to the front tower landing pads after the truck is in service.

12. Evenly tighten the rocker mounting pad assembly bolts to a torque of 100 ± 20 N·m (74 ± 15 lb ft).

13. Evenly tighten the truck body pad assembly bolts to a torque of 105 ± 20 N·m (77 ± 15 lb ft).

14. Ensure that there is adequate clearance to the cab.

15. Inspect pad wear (footprint of pads on the frame rails) at first periodical maintenance, and reshim if required.

    Note: Verify the body frame rail to body pad contact patterns using the paint/grease transfer method at the first scheduled service interval after the truck has been in service. Reshim pads one pad at a time as needed to achieve the most complete contact pattern possible.

Truck Body Guides Install

Note: Do not install the truck body guides until the body pads have been installed.

Show/hide table

Illustration 37	g03871377

Show/hide table

Illustration 38	g03862932
(26) 149-4621 Guide (B) 8 ± 1 mm (0.32 ± 0.04 inch) (C) 92 mm (3.6 inch)

Show/hide table

Illustration 39	g03863112

Show/hide table

Illustration 40	g03863046
(26) 149-4621 Guide (W5) 8 mm (0.32 inch) Fillet weld (W6) 10 mm (0.4 inch) Fillet weld with 10 mm (0.4 inch) Bevel Groove weld (W7) 6 mm (0.24 inch) Bevel Groove weld

1. Weld guide (26) to the crossbeam. The weight of one guide (26) is approximately 21 kg (47 lb).

2. Repeat Step 1 for the remaining guide on the opposite side.

Body Position Linkage Connect

Note: The body position linkage is calibrated during the commissioning of the truck.

Show/hide table

Illustration 41	g03863459

Show/hide table

Illustration 42	g03863467
(57) 8T-4195 Bolt (58) 8T-4121 Hard Washer (59) 344-5675 Nut (60) 158-0488 Rod As

1. Remove one bolt (57), two washers (58), and one nut (59) from linkage (60). Retain the hardware.

2. Position linkage (60) and install one washer (58) and one bolt (57).

3. The body position linkage is calibrated during the commissioning of the truck. Refer to Special Instruction, REHS6122, "Commissioning Procedure for the 797F and the 797F XQ Off-Highway Truck" after the truck has been assembled.

Lubrication Lines Connect

Show/hide table

Illustration 43	g03876116
(53) 148-8389 Elbow As

1. Install one elbow assembly (53) onto the hoist cylinder.
   Show/hide table

   Illustration 44	g03876133
   Hoist Cylinder (61) 216-9206 Plug As (62) 8X-8474 Hose As

2. Remove one plug assembly (61) from grease hose assembly (62).
   Show/hide table

   Illustration 45	g03876135
   (15) 8T-4121 Hard Washer (54) 4K-8864 Clip (55) 8T-4137 Bolt (62) 8X-8474 Hose As

3. Connect grease hose assembly (62). Install one clip (54), one hard washer (15), and one bolt (55).
   Show/hide table

   Illustration 46	g03876137
   (15) 8T-4121 Hard Washer (54) 4K-8864 Clip (55) 8T-4137 Bolt

4. Install five clips (54), five hard washers (15), and five bolts (55).

5. Repeat Step 1 through Step 4 for the opposite side of the truck body.

Commission the Truck

1. After the truck has been assembled, commission the truck. Refer to Special Instruction, REHS6122, "Commissioning Procedure for the 797F and the 797F XQ Off-Highway Truck" for the correct procedure.