GROVE Published 1-20-2017, Control# 483-02 7-19
CD5515-2/YB5515-2 SERVICE MANUAL TRANSMISSION AND TORQUE CONVERTER
Example Only:
Readings should not vary between clutches by more than
0.7 bar (10 psi). In the example shown, we can see that
pressure is low when 2nd and 4th gear forward is selected,
indicating clutch leakage.
From the example you can see that the forward clutch high is
used for selection of both 2nd and 4th gear forward. We
know from the table that the mainshaft and layshaft clutches
are working normally (1st and 3rd gear selection shown
normal operating pressures). So it can be assumed that the
forward high clutch is leaking.
We can now confirm the forward reverse clutch is leaking by
completing an “Individual Clutch Leakage Test.”
NOTE: Repeat the above procedure using reverse ratios if
necessary.
Individual Clutch Leakage Test
In the following procedures the forward high clutch is tested,
therefore, in Step 2 a pressure gauge is connected to the
forward high clutch test point.
Gear
Selected
Ratio Clutch
Mainshaft
or
Layshaft
Clutch
PSI Bar
First Forward Low Layshaft 140 9.62
Second Forward High Layshaft 125 8.62
Third Forward Low Mainshaft 140 9.65
Fourth Forward High Mainshaft 125 8.62
Reference Only
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