GROVE Published 1-20-2017, Control# 483-02 7-7
CD5515-2/YB5515-2 SERVICE MANUAL TRANSMISSION AND TORQUE CONVERTER
Clutch Operation
The transmission reverse high and reverse low clutch
assemblies (Figure 7-5) are operated by the double solenoid
valve.
In neutral, the solenoid valve blocks the flow of pressurized
oil to the clutches.
When energized, the solenoid valve, depending on which
coil is energized, diverts pressurized oil by way of the shaft to
the appropriate clutch in the unit. Pressure from the other
clutch is vented to the sump by way of the solenoid valve
spool.
NOTE: The forward high and forward low clutch unit
operates in a similar manner.
The mainshaft and layshaft assemblies each have a single
clutch. The principle of operation similar to the forward/
reverse, high/low clutch assemblies i.e., the mainshaft/
layshaft solenoid valve diverts oil to either the mainshaft
clutch or the layshaft clutch.
FIGURE 7-5
a2277
Forward High and Low Clutch Operation - Typical
Reference Only
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