Figure 4-5. Transmission Power Flow

TM 10-3930-623-12

4-48. TRANSMISSION (see figures 1-7 and 1-8).

4-49. Control Oil. Oil is directed from the transmission

Engine power is delivered to the transmission through a

oil pump to a regulating valve which regulates main

torque converter between the engine flywheel and the

pressure and bypasses excess oil to the lubrication

transmission input shaft. Refer to paragraphs 1-24

circuit. Oil under main pressure then flows to the inching

through 1-27 for a description of the mechanical

valve which is controlled through linkage by the brake

arrangement of the transmission. Figure 4-5 shows how

pedal in the operator's compartment. Depressing the

engagement of either the forward or reverse clutch

brake pedal allows the inching control valve to move

directs the power flow through the transmission to drive

outward, gradually blocking main pressure feed to the

the truck.

Hydraulic control of the transmission is

pump valve located in the main valve body adjacent to

accomplished as follows:

the inching valve. The end

Figure 4-5. Transmission Power Flow

4-7