793C Off-Highway Truck/Tractor Power Train Caterpillar


Transmission Hydraulic Control - Remove

Usage:

793C 4AR

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
138-7575  Link Bracket 

Start By:

  1. Install the truck body retaining cable. Refer to Disassembly and Assembly, "Truck Body Retaining Cable - Remove and Install".


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! ------

At operating temperature, the hydraulic tank is hot and under pressure.

Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin.

Remove the filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. Remove the filler cap slowly in order to relieve pressure.


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

The space between the body and the frame becomes a zero clearance area when the body is lowered. Failure to install the retaining cable can result in injury or death to personnel working in this area.



NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.




    Illustration 1g00514589

  1. Remove bolt (10), the washer, and clip (11) from harness (4).

  2. Remove two bolts (2), two washers, and clip (3) from guard (1) and harness (4).

  3. Disconnect harness (12) from the transmission gear switch of the EPTC II.

  4. Disconnect hose assembly (8). If necessary, remove O-ring seal (5), elbow (6), and O-ring seal (7).


    Illustration 2g00514590

  5. Remove remaining two bolts (2), two washers, clip (3), and guard (1).

  6. Disconnect three harness connections (13) from the transmission solenoids.

  7. Remove 21 bolts (14) from cover (15).

  8. Remove cover (15).


    Illustration 3g00514591

  9. Remove gasket (16).


    Illustration 4g00514593


    Illustration 5g00514595

  10. Remove four bolts (17), four washers, and transmission valve (9).

  11. Place the transmission valve (9) on a suitable bench.

  12. Remove coupler assembly (19), tube assembly (18), tube (20), and two tubes (21) with transmission valve (9).


    Illustration 6g00514596

  13. Remove four bolts (22) and four washers.

    Note: Identify the locations of four bolts (22) for installation purposes.



    Illustration 7g00514597

  14. Remove bolt (24). Position Tool (A). Reinstall bolt (24).

  15. Use a suitable hoist to remove transmission valve (23). Transmission valve (23) weighs approximately 61 kg (134.5 lb).

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