MAINTENANCE
21
TORQUE SPECIFICATIONS
For correct hardware tightening on the Chipper,
we suggest the use of a suitable torque wrench
and t he a pplicable t orque a s l isted i n t he
table.
M-THREADED SCREW / BOLTS
Bolt Grade
Thread
8.8
10.9
Nm
lb / ft
Nm
lb / ft
M6
11
8.5
17
12
M8
28
20
40
30
M10
55
40
80
60
M12
95
70
140
105
M14
150
110
225
165
M16
240
175
305
225
M18
330
250
475
350
PROBLEM
POSSIBLE CAUSE
REMEDY
Not chipping cleanly or f ywheel
plugging.
Dull knives.
Sharpen or reverse knives.
Bed knife dull or rounded.
Sharpen or reverse bed knife.
Bed knife not adjusted properly. Adjust to clearance of .063 to .126
Unit will not feed.
Limb forks too wide.
Remove from hopper and trim off
forks.
Chipper requires excessive
power or stalls.
Plugged f ywheel.
Clear f ywheel, then feed material
more evenly.
Obstructed discharge.
Clean out discharge chute.
Improper blade clearance.
Adjust clearance of bed knife.
Chipper vibrates.
Material balled up on f ywheel.
Clean f ywheel with putty knife or
other tool.
Broken or loose part.
Access f ywheel and repair what is
required.
Chipper RPM slows, but tractor
RPM does not.
Drive belts are slipping
Tighten belts.
Dull knives.
Sharpen or reverse knives.
Excessive belt wear.
Belt tension too loose.
Replace belts or spring.
Pulleys not in alignment.
Align pulleys with straight edge.
Pulleys damaged or worn.
Replace pulley or pulleys in
question.
Rotor will not turn.
Plugged rotor.
Clear rotor then feed material more
evenly.
Obstructed discharge.
Clean discharge chute.
Drive belts loose or broken.
Replace belts and/or spring.
TROUBLESHOOTING
