Echo 74520 Owners Manual v.2 - Manual (Page 24)

Page 20 5" Chipper W/Hyd Feed Owners Manual
5.4 SETTING CHIPPING BLADE
CLEARANCE
The chipping blades should clear the chipper block
located directly under the chipper chute by 1/16 inch to
1/8 inch. To adjust the blade clearance, proceed as
follows:
Service and Maintenance
5.5 CLEANING PLUGGED ROTOR
1. Lift rotor access cover and expose rotor. Loosen the
two 1/2 inch bolts that hold the chipper anvil to the
frame.
2. Measure the amount of clearance between chipping
blade and chipper anvil from inside of housing. The
gap should be 1/16" to 1/8".
3. Adjust inward or outward to desired measurement.
Use the nuts on the adjustment bolt for PTO models
(See Fig. # 11).
4. Tighten bolts on chipping block to 75 ft. lbs. and
resume operation.
Remove the two bolts holding the anvil and use one of the
other three edges if the chipper anvil edge is damaged or
worn unevenly. Adjust for correct measurement.
Feeding too much chipable material at once can plug the
chipper. To clear plugged rotor, proceed as follows:
1. On towable models press foot clutch pedal and stop
engine. Release foot clutch pedal when engine is
stopped.
2. Remove the one 3/8" retaining bolt holding the access
cover to the main frame assembly.
3. Lift up rotor access cover.
4. Clean the debris from the chipper rotor. On towable
models, release idler and turn the rotor by hand to be
sure it is free to rotate.
5. Close rotor access cover and replace bolts.
Fig. # 11, Chipper blade and anvil clearance
1/16" - 1/8"
ROTOR
CHIPPER
BLADE
ANVIL
ADJUSTMENT
ANVIL