785G IV Off-Highway Truck Field Assembly Caterpillar


Fuel Tank - Install

Usage:

785G RTL

Parts and Specification Information



Illustration 1g06162133


Illustration 2g06162137

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.

Table 1
Item  Part Number  Part Description  Qty  Specification  Approximate Weight 
379-8226 Fuel Tank Ar, 422-4975 Fuel Lines Gp 
379-8335  Fuel Tank Ar    1530 kg (3373 lb) 
8T-4185  Bolt     
198-4777  Hard Washer     
Fuel Filter Sub-Assembly     
6v-9853  Elbow     
228-7092  O-Ring Seal     
9T-3752  Check Valve     
238-5082  O-Ring Seal     
422-4974  Tube As     
10  367-5985  Ball Valve     
11  238-5084  O-Ring Seal     

Installation Procedure

Table 2
Required Tools 
Tool  Part Number  Part Description  Qty 
1U-9200  Lever Puller Hoist Gp 

Start By:

  1. Install Left-Hand Walkway


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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.

Dispose of all fluids according to local regulations and mandates.


------ WARNING! ------

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.


------ WARNING! ------

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.



    Illustration 3g06162284

  1. Clean the mounting bores on the frame free of wax, dirt, debris, paint, and grease.


    Illustration 4g06162261
    (1) 379-8335 Fuel Tank Ar

  2. Clean three mounting surfaces of fuel tank assembly (1) free of wax, dirt, debris, paint, and grease.


    Illustration 5g06162241
    (12) 8T-4187 Bolt
    (13) 8T-4123 Washer
    (14) 6G-5294 Cap
    (15) 8X-2232 Shim Pack
    (16) 8C-8478 Bolt
    (17) 198-4781 Hard Washer
    (18) 8T-4131 Nut
    (19) 8N-1214 Mount As

  3. Remove four bolts (12), four washers (13), two caps (14), four shim packs (15).

  4. Remove two bolts (16), four washers (17), two nuts (18), and four mount assemblies (19).


    Illustration 6g06162312
    (1) 379-8335 Fuel Tank Ar
    (2) 8T-4185 Bolt
    (3) 198-4777 Hard Washer
    (4) Fuel Filter Sub-Assembly
    (5) 6V-9853 Elbow
    (6) 228-7092 O-Ring Seal
    (7) 9T-3752 Check Valve
    (8) 238-5082 O-Ring Seal
    (9) 422-4974 Tube As
    (10) 367-5985 Ball Valve
    (11) 238-5084 O-Ring Seal

  5. Install fuel filter sub-assembly (4), four washers (3), four bolts (2) one O-ring seal (8), one check valve (7), two O-ring seals (6), one elbow assembly (5), one O-ring seal (11) and one ball valve (10) onto fuel tank assembly (1).


    Illustration 7g06162432
    (1) 379-8335 Fuel Tank Ar
    (A) 1U-9200 Lever Puller Hoist Gp

  6. Use Tooling (A) and the suitable lifting device to install fuel tank assembly (1) onto the frame. The weight of fuel tank assembly (1) is approximately 1530 kg (3373 lb). Check to ensure the mounting lugs are positioned into the fuel tank mounting brackets on both sides


    Illustration 8g06162451
    (12) 8T-4187 Bolt
    (13) 8T-4123 Washer
    (14) 6G-5294 Cap
    (15) 8X-2232 Shim Pack

  7. Install cap (14), two washers (13), and two bolts (12). Repeat this step for the opposite side.

  8. Measure the two gaps between the bottom edges of the caps and the top edges of the mounting brackets. Repeat this step for the opposite side.

  9. Average the four measurements and record as Dimension (X).

  10. Remove two bolts (12), two washers (13), and cap (14). Retain the hardware. Repeat this step for the opposite side.


    Illustration 9g06162459
    (12) 8T-4187 Bolt
    (13) 8T-4123 Washer
    (14) 6G-5294 Cap
    (15) 8X-2232 Shim Pack

  11. Install a thickness of shims from shim pack (15) that is equal to dimension (X) +0.00 / -0.12 mm (+0.0000 / -0.005 in) at four places. Install cap (14), two washers (13), and two bolts (12). Repeat this step for the opposite side.


    Illustration 10g06162470
    (16) 8C-8478 Bolt
    (17) 198-4781 Hard Washer
    (18) 8T-4131 Nut
    (19) 8N-1214 Mount As

  12. Install four mount assemblies (19), four washers (17), two bolts (16), and two nuts (18)


    Illustration 11g06163263
    ( 22) 8T-4179 Bolt
    (23) 8T-4223 Hard Washer
    (24) 479-2171 Bolt As
    (25) 424-2347 Plate
    (26) 424-2340 Block
    (27) 424-2322 Block
    (28) 424-2312 Block
    (29) 479-2171 Bolt As

  13. Remove and discard one cap (20) and one plug (21)

  14. Remove and retain one bolt (22) and one washer (23), two bolts (24), one plate (25), one blocks (26), one blocks (27), two blocks (28) and one bolt (29).


    Illustration 12g06163340
    (22) 8T-4179 Bolt
    (23) 8T-4223 Hard Washer
    (24) 479-2171 Bolt As
    (25) 424-2347 Plate
    (26) 424-2340 Block
    (27) 424-2322 Block
    (28) 424-2312 Block
    (29) 479-2171 Bolt As
    (30) 492-6101 Fuel Tank Harness As
    (31) 492-6083 Cable As
    (32) 492-6102 Fuel Tank Harness As
    (33) 492-6082 Cable As

  15. Connect fuel tank harness assembly (30), fuel tank harness assembly (32), cable assembly (31), and cable assembly (33). Install one washer (23), one bolt (22), one bolt assembly (29), one block (26), one block (27), two blocks (28), one plate (25), and two bolts assemblies (24).


    Illustration 13g06163345
    (34) 467-2622 Hose As
    (35) 507-6928 Hose As

  16. Connect hose assembly (34) and hose assembly (35).

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