TM-5-3805-254-34

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

MARCH 1993

TM-5-3805-254-34 - Page 561 of 727

TM 5-3805-254-34

15-4.

CAB ASSEMBLY MAINTENANCE.

This Task Covers:

a. Removal

b. Disassembly

Initial Setup:

Equipment Conditions:

• Dump body raised (see TM 5-3805-254-10).

• Preheater primer pump removed (see TM 5-

3805-254-20).

• Preheater primer pump fuel lines and fittings

removed (see TM 5-3805-254-20).

• Accelerator control pivot arm removed (see TM

5-3805-254-20).

• Accelerator control pedal removed (see TM 5-

3805-254-20).

• Hand throttle control removed (see TM 5-3805-

254-20).

• Exhaust diverter removed (see TM 5-3805-254-

20).

• Muffler and raincap removed (see TM 5-3805-

254-20).

• Left brake light switch removed (see TM 5-3805-

254-20).

• Right brake light switch removed (see TM 5-

3805-254-20).

• Low air pressure warning light switch removed

(see TM 5-3805-254-20).

• Low air pressure warning buzzer switch removed

(see TM 5-3805-254-20).

• Secondary magnetic switch removed (see TM 5-

3805-254-20).

• Horn relay removed (see TM 5-3805-254-20).

• Low air pressure warning buzzer removed (see

TM 5-3805-254-20).

• Turn signal and hazard flasher removed (see TM

5-3805-254-20).

• Alarm bell removed (see TM 5-3805-254-20).

• Domelight removed (see TM 5-3805-254-20).

• Engine compression brake 15 amp circuit

breaker removed (see TM 5-3805-254-20).

• Backup light 20 amp circuit breaker removed

(see TM 5-3805-254-20).

• Heater 40 amp circuit breaker removed (see TM

5-3805-254-20).

• Horn 20 amp circuit breaker removed (see TM 5-

3805-254-20).

• Glow plug and cigar lighter 40 amp circuit

breaker removed (see TM 5-3805-254-20).

• Stop and domelight 30 amp circuit breaker

removed (see TM 5-3805-254-20).

c. Assembly

d. Installation

Equipment Conditions (Con’t):

• Tail and panel light 20 amp circuit breaker

removed (see TM 5-3805-254-20).

• Headlight 20 amp circuit breaker removed (see

TM 5- 3805-254-20).

• Marker light 30 amp circuit breaker removed

(see TM 5-3805-254-20).

• Fuse block removed (see TM 5-3805-254-20).

• Ignition system starter circuit breaker removed

(see TM 5- 3805-254-20).

• Center engine side of firewall junction box

removed (see TM 5-3805-254-20).

• Right engine side of firewall junction box

removed (see TM 5-3805-254-20).

• Left side of firewall junction box removed (see

TM 5-3805-254-20).

• Front-rear of cab junction box removed (see TM

5-3805-254-20).

• Rear-rear of cab junction box removed (see TM

5-3805-254-20).

• Cab roof marker light and clearance light

removed (see TM 5-3805-254-20).

• Automatic override module removed (see TM 5-

3805-254-20).

• Transmission shift control stand removed (see

TM 5-3805-254-20).

• Transmission shift cable removed (see TM 5-

3805-254-20).

• Brake pedal removed (see TM 5-3805-254-20).

• Parking brake lines removed (see TM 5-3805-

254-20).

• Cab floor through connector to double check

valve hose removed (see TM 5-3805-254-20).

• Driver's seat removed (see TM 5-3805-254-20).

• Passenger's seat removed (see TM 5-3805-254-

20).

• Heater core hoses removed (see TM 5-3805-

254-20).

• Windshield wiper motor removed (see TM 5-

3805-254-20).

• Air horn removed (see TM 5-3805-254-20).

• Air horn control valve removed (see TM 5-3805-

254-20).

• Dump body control lever switch removed (see

TM 5-

3805-254-20).

15-13