SECTION 88 - ACCESSORIES
88-17
PROBLEM
POSSIBLE CAUSE CORRECTION
No increase in hydraulic oil flow
when switch is in the “ON” position
No switch operation
No selector valve operation
Selector valve spool binding
Drive belt slipping or broken
Check power supply circuit
Check power supply from switch
Check for spool binding and repair
Check drive belt adjustment or
replace
Low hydraulic power Low high flow relief valve pressure
setting
Low main system relief valve
setting
Leaking control valve plugs,
leaking oil to return
Inefficient gear pump (main)
Inefficient gear pump (high flow)
Check and replace relief valve
Check and replace relief valve
Check O ring and backup washer
on plugs
Check pump efficiency, repair or
replace
Check pump efficiency, repair or
replace
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