15” DRUM TROUBLESHOOTING GUIDE
61
ONLY USE QUALIFIED PERSONNEL TO WORK ON HYDRAULIC SYSTEMS
FOR REPAIRS OR REPLACEMENT OF PARTS!!
COMPLAINT CAUSE CORRECTION
Engine won’t turn over • Battery is dead
• Clutch is engaged
• Cutter drum hood safety
switch is not in position
• Recharge or replace battery
• Disengage the clutch
• Cutter drum hood lock pin
and safety switch must be in
position for the engine to
start
Hydraulic oil overheating and
causing chipper to operate
slower than normal
• Hydraulic pump has
excessive wear or not
working properly
• Hose crimped or leaking
• Relief valve opens too easily
or stuck open
• Feed wheels binding
• Hydraulic tank oil level is
too low, hydraulic oil is
contaminated, or hydraulic
filter is dirty
• Hydraulic oil viscosity is
wrong for atmospheric
temperature
• Check & replace pump, if
necessary
• Replace (see Servicing
Hydraulics section)
• Valve needs to be cleaned or
replaced; reset pressure
• Check feed wheel bearings,
lubricate properly
• Keep oil tank about 7/8 full;
follow proper maintenance
schedule and change oil and
filter as suggested (see
Servicing Hydraulics
section)
• Contact JP Carlton or local
dealer for recommended oil
type for the situation
Hydraulic pump making loud
noise or a lot of noise (pump is
cavitated)
• Hydraulic oil viscosity is
wrong for atmospheric
temperature
• Oil operating temperature
too low
• Pump has excessive wear
• Contact JP Carlton or local
dealer for recommended oil
type for the situation
• Allow system to warm up
• Replace pump
Any other problems, please contact your local dealer or J. P. Carlton Co.
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