Mm Mm Mm Mm; Transmission - Kalmar DRF420-60S5 Maintenance Manual

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mm mm mm mm

Multi-function lever (S162)

2 Transmission – 2 Transmission

Maintenance manual DRF 400–450

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Transmission, function description

The transmission converts the engine power to the drive wheels

(drive axle) via the propeller shaft and also power to drive the hy-

draulic oil pumps for hydraulics and the brake system.

The transmission is fully automatic with torque converter. It has four

forward gears and four reverse gears.

The torque converter and the transmission work together via a com-

mon hydraulic system. The torque converter is a hydraulic clutch

placed between the engine's output shaft and the transmission's in-

put shaft. The hydraulic oil pumps as well as the oil pump for the

transmission's control and lubrication are connected to the torque

converter via power take-offs on the transmission.

Gear positions are selected by pressure modulation with electrical

valves that are controlled by Control unit transmission (D793). The

control unit uses sensors for pressure, temperature and speeds to

determine which gear position shall be activated as well as solenoid

valves to activate the gear.

Sensor engine speed and oil temperature (B758/766)

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