DR 18 HP Safety & Operating Instructions Manual page 53

BEFORE PERFORMING ANY MAINTENANCE PROCEDURE OR INSPECTION, STOP THE ENGINE, WAIT
FIVE (5) MINUTES TO ALLOW ALL MOVING PARTS TO COME TO A COMPLETE STOP AND COOL.
DISCONNECT THE SPARK PLUG WIRES, KEEPING THEM AWAY FROM THE SPARK PLUGS.
S P
YMPTOM OSSIBLE
⇒ Check for a dull or damaged Knife; sharpen or replace the Knife. See page 38.
The machine has
excessive vibration.
⇒ The Knife may not be properly seated on the flywheel. Loosen the Knife mounting
⇒
⇒ The Knife is dull; sharpen or replace it. See page 38.
When chipping,
the log seems to
⇒
vibrate excessively
and "hammers"
my hands.
Chipper Knife is ⇒ The gap between the Knife and the Wear Plate is set incorrectly; adjust the Wear
hitting the Wear
Plate.
⇒ The inner Shoes of the Clutch are worn and/or the Clutch Shoe Retaining Springs
Engine runs but
the flywheel
doesn't rotate.
⇒ Loose Drive Belt; adjust the Drive Belt tension. See page 35.
⇒ Remove any built-up debris from the Chipper Hopper Inlet and Discharge Chute.
The machine's ⇒ Check the tire pressure. There should be 60 psi in each tire.
wheels track left or
right while being
towed.
C
AUSE
screws, reset the Knife and tighten the screws. Also, check the Wear Plate Gap. See
page 40.
If the machine still exhibits excessive vibration, call 1(800) DR-OWNER (376-9637)
for assistance.
The gap between the Knife and Wear Plate is too great; adjust the Gap. See page 40.
Plate Gap. See page 40.
are weak or broken. Replace worn or broken Clutch parts. See page 41.
CALL TOLL FREE 1-800-DR-OWNER
49