Improved Power Train Software and Controllers Now Used on AD55B Underground Articulated Trucks {1408, 4800, 4808, 7490, 7610, 7620} Caterpillar


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Improved Power Train Software and Controllers Now Used on AD55B Underground Articulated Trucks {1408, 4800, 4808, 7490, 7610, 7620} [M0064382]
ELECTRICAL AND STARTING SYSTEM
ELECTRONICS GP-POWER TRAIN
Underground Art Truck
AD55B (S/N: JNW1-UP)

Description Of Change: Improved power train software and controllers are now used. The improved power train software and controllers reduce system voltage to the parking brake solenoids, correcting a problem of the coils overheating.

Adaptable To: The improved power train software and controllers are effective in production with, and adaptable to the following machines.

Table 1
Model  Effective With  Adaptable To 
AD55B  S/N:JNW276-UP  S/N:JNW1-246,248-269,271-275 
Refer to the following procedure to install the improved power train software and controllers.

Parts Required

Table 2
Qty  Part Number  Description 
130-5300  Clip 
3S-2093  Cable Strap 
473-9758 (1)  Power Train Software Gp 
459-4958  Controller 
459-7577  Harness As 
459-7578  Harness As 
7C-8246  Spacer 
(1) Go to SIS Web, "Service Software Files" to obtain the new power train software.


    Illustration 1g03724042
    View of the parking brake control valve

  1. Disconnect machine harness connector (1) from parking brake solenoid valve connector (3).

  2. Disconnect machine harness connector (4) from parking brake solenoid valve connector (5).

  3. Remove and discard bolt (2). Retain the nut and washers.


    Illustration 2g03724037
    View of the parking brake control valve
    (6) 459-4958 Controller
    (7) 7C-8246 Spacer
    (8) 130-5300 Clip
    (9) 8T-4185 Bolt
    (10) 459-7578 Harness As
    (11) 459-7577 Harness As


    Illustration 3g03724728
    View of the parking brake control valve
    (3) Parking brake solenoid valve connector
    (5) Parking brake solenoid valve connector
    (10) 459-7578 Harness As
    (11) 459-7577 Harness As

  4. Install Item (6) through Item (11). Refer to Illustration 2 and Illustration 3.

    Note: Use the nut and washers removed in Step 3.

  5. Connect machine harness connector (1), disconnected in Step 1, to 459-7578 Harness As (10). Refer to Illustration 1 and Illustration 2.

  6. Connect machine harness connector (4), disconnected in Step 2, to 459-7577 Harness As (11). Refer to Illustration 1 and Illustration 2.

  7. Connect parking brake solenoid valve connector (3), disconnected in Step 1, to 459-7578 Harness As (10). Refer to Illustration 1 and Illustration 3.

  8. Connect parking brake solenoid valve connector (5), disconnected in Step 2, to 459-7577 Harness As (11). Refer to Illustration 1 and Illustration 3.

  9. Install the connectors on 130-5300 Clips (8) and secure all harnesses using 3S-2093 Cable Straps as required.

  10. Install 473-9758 Power Train Software Gp. Go to SIS Web, "Service Software Files" to obtain the new power train software.

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