Bandit
88
Copyright 9/18
MODEL 15XP/1390
HYDRAULICS
HYDRAULIC SYSTEM TROUBLE SHOOTING
Before attempting any type of maintenance, disengage clutch, wait for the disc/drum to come to a complete
stop, turn off engine, remove the ignition key, make sure the ignition key is in your possession, install the
disc/drum lock pin, and disconnect the battery.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Feedwheel(s) turn
at normal speed but
does not chip wood
properly.
Dull knives.
Replace knives
Worn feed teeth
Replace
Low feedwheel relief valve setting
Readjust to specifi ed PSI (bar)
Pump is worn
Replace
Motor is weak
Replace
Feedwheel springs too loose
Adjust
Clutch / belts out of adjustment
Adjust
Engine not running at full RPMs
Adjust
Feedwheel(s)
slow or stop when
feeding
Dull knives
Replace knives
Relief valve is worn or dirty
Clean, reset, or replace
Pump is worn
Replace
Motor is worn
Replace
Feedwheel springs too tight
Adjust
Feedwheel slide box sticking or hanging
up
Lubricate
Feedwheel(s) turn
slowly or not at all
Relief valve stuck open
Clean or replace
Worn hydraulic motor
Replace
Pump is worn
Replace
Feedwheel relief pressure not correct
Reset to specifi ed PSI (bar)
Pinched or damaged hydraulic hose
Replace
Feedwheel valve (control valve) worn &
leaking internally
Replace
Autofeed dump valve stuck open
Lightly tap on dump block, remove &
clean, or replace
Low hydraulic oil level
Fill to 3/4” to 7/8” full minimum
Plugged oil screen
Replace
Binding such as worn bearings, etc.
Repair
Control lever improperly shifting valve
Readjust, valve must open completely
Hydraulic oil very
hot, causing system
to operate slowly
Dull knives
Replace knives
Low oil level
Fill 3/4” to 7/8” full minimum
Pump is worn
Replace
Relief valve stuck open or opens easily
Clean, reset, or replace
Damaged hose
Replace
Oil suction screen or fi lter plugged
Clean or replace
Oil cooler plugged (if equipped)
Clean
Motor is worn
Replace
Binding
Repair
Operator running oil over relief too much DO NOT DO THIS
Flow control is on for too long
Open fl ow control
MAINTAIN FEEDWHEEL HYDRAULIC PRESSURE AT SPECIFIED PSI (bar)
Follow typical hydraulic flow and relief settings on pages 81 ‑ 87.
Follow proper hydraulic oil requirements on pages 79 - 80.