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Problem
Unable to move feed rate
knob.
Feed rollers does not move
when machine is running.
Workpiece does not feed
smoothly.
Machine vibrates
excessively or makes
unexpected noise.
Uneven depth of cut side to
side.
Board thickness does not
match the scale's
measurement.
52 | Page
Possible Cause
Machine is not running.
Gear box is in neutral.
Low feed roller
pressure.
Incorrect feed roller
height setting.
Dirty planer table /
rollers.
Belt slipping
Stuck planer bed roller.
Damaged cutter
inserts.
Machine stands on
uneven floor.
Chip deflector is hitting
the cutterhead.
V-belt worn, slipping or
hitting belt cover.
Feed roller bushing
needs lubrication.
Bent pulley
Improper motor
mounting.
Loose components.
Worn bearings
Cutterhead is not
parallel with planer
table.
Cutterhead height scale
is mispositioned.
Oliver Machinery
Possible Solution
Only move feed rate knob while the
machine is running idle at full speed.
Shift feed rate control knob to set feed rate
to 16/20 FPM while machine is running idle
at full speed.
Adjust feed roller spring tension.
Adjust feed rollers height so the bottom of
the rollers is below the lowest point of the
cutterhead.
Infeed Roller: 0.020" - 0.027" below.
Outfeed Roller: 0.059" - 0.079" below.
Clean table and rollers. Apply paste wax on
the table to reduce drag. Do not use silicon
lubrications on table top.
Clean belt and the pulleys. Adjust belt
tension.
Clean and lubricate roller.
Replace cutter inserts.
Reposition on flat, level surface.
Move chip deflector 1/16"- 1/8" away from
cutterhead.
Clean belt and pulleys. Adjust belt tension.
Replace V-belt if it shows signs of aging.
Lubricate bushings.
Replace pulley.
Check and adjust motor mounting.
Tighten fasteners of the component.
Contact customer service for assistance.
Adjust cutterhead-table parallelism.
Tolerance: Less than 0.005" side-to-side.
Adjust the scale.
4420 Planer
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