TRANSMISSION AND TORQUE CONVERTER CD5515-2/YB5515-2 SERVICE MANUAL
7-6 Published 1-20-2017, Control# 483-02
Hydraulic Operation - Four- Wheel Drive
The solenoid adapter block also houses a solenoid valve K
for the four-wheel drive clutch Figure 7-5. Oil under pressure
is directed to the solenoid where it stopped. The purpose of
the solenoid is to change the transmission from four-wheel
drive mode to two-wheel drive mode. In four-wheel drive
mode the solenoid valve is not actuated and the clutch pack
J is spring applied. In two-wheel drive mode the solenoid is
actuated and hydraulic oil is directed to the clutch pack
releasing the clutch. Although the solenoid is furnished
with the cranes with four-wheel drive, the two-wheel
drive option is not available and the transmission is always
in four-wheel drive.
FIGURE 7-4
a0233
Four-Wheel Drive Transmission Hydraulic Circuits - Typical
Reference Only
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