31
9 INCH CHIPPER
ENGLISH
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSES
REMEDY
Hard to feed chipper,
requires excessive
power to chip
Dull chipper blades
Flip, sharpen, or replace
Obstructed discharge
Use branch or similar object to clear
discharge tube
Improper blade clearance
Set blade/anvil clearance to recommended
distance
Excessive vibration
while running
Dull chipper blades
Flip, sharpen, or replace
Drive system vibration
Check drive belts, bearings, and pulleys for
bad or worn areas. Check for dull chipper
blades.
Rotor out of balance
Inspect rotor for damaged or missing
chipper blades, replace if needed
Chipper blade to anvil clearance is incorrect Set blade/anvil clearance to recommended
distance
Feed roller operation is
reversed
Wire harness connection at valve is
incorrect
Switch wire harness connection from A to
B and B to A. Green and white wire should
connect to A on valve. Orange and white
wires should connect to B on valve
Hose connection from valve to motor is
incorrect
Ensure that the hoses go from port A on
valve to port A on motor and B to B.
Cannot achieve solid
green for forward feed
Drive belts loose or worn
Inspect drive belts, adjust or replace if
needed
Engine/Tractor is not achieving full RPM
Confirm that engine is achieving full RPM.
Confirm that PTO is 540 RPM.
Knee bar sensor does
not stop feed roller
Knee bar linkage is not free to move
Check knee bar linkage for full range of
motion
Harness connection or sensor failure
Check harness connection. Adjust or
replace sensor.
Feed roller alternates
between forward and
reverse
Hydraulic motor is malfunctioning
Hydraulic motor needs to be replaced
Pressure switch fault
Unhook the pressure switch, test for
operation. If the forward feed works or the
feed roller stops “ratcheting,” replace the
pressure switch.
Feed roller will not
achieve Forward or
Reverse
Forward or Reverse coil on hydraulic valve
is malfunctioning or faulty wiring.
Plug wire from the faulty coil, as indicated
on the Diagnostic Screen, into the other coil.
Start chipper, engage belt, and achieve solid
green indicator. Push the button (Forward or
Reverse) for the faulty coil. If the feed roller
works opposite of the intended direction,
replace coil and reconnect wires: Green
and white to A (Forward), Orange and white
to B (Reverse). If the feed roller does not
operate in the opposite direction, look for a
fault in the wiring.
Faulty wiring
Check harness for: grounded wire, cut wire,
etc.
Trailer sways during
towing
Discharge tube and/or extension tray not in
correct towing position.
Before towing the machine, position and
lock the discharge tube to face the opposite
direction of the towing vehicle and raise the
extension tray.
Tire air pressure is not correct
Check tire sidewall for inflation limits
