Echo 72928 Owners Manual v.5 - Manual (Page 25)

9 INCH CHIPPER 23
SERVICE & MAINTENANCE
4.5 rePlacing drive belT
4.6 clearing Plugged roTor
1. Stop engine and wait for all moving parts to stop.
2. Remove rotor access cover.
3. Clean the debris out of the chipping rotor. Turn the
rotor by hand to be sure it is free to rotate.
4. Close rotor access cover and replace bolts.
5. Depress belt engagement pedal, start engine, and
resume operation.
Warning
If the machine becomes plugged, shut off engine and
allow the machine to come to a complete stop before
cleaning debris. Do not operate the machine without
proper guards and screens in place.
Check the condition of the drive belt annually or after every
25 hours of operating, whichever comes first. If the belt is
cracked, frayed, or worn, replace it. To replace or adjust
drive belt, proceed as follows:
Shut off engine. 1.
Remove large belt guard. 2.
Remove the hydraulic pump belt by loosening the bolts 3.
on the hydraulic pump (Figure 4.3).
SPAN LENGTH
FORCE
20 LBS
7/16" DEFLECTION
Figure 4.4, Belt tension
CHIPPER
ANVIL
SPACER
ROTOR
HOUSING
Figure 4.2, Chipping anvil location
Take the tension off the drive belt by depressing the 4.
belt engagement pedal. Remove the drive belt from
pulleys.
Install the new drive belt on pulleys.
5.
Check pulley alignment with a straight edge and adjust 6.
engine if needed.
Check belt tension and adjust if needed. The belt de-
7.
flection at the center of the belt should be 7/16" when
a 20 lb. load is placed against the belt (see Figure
4.4).
Reinstall hydraulic pump belt. Readjust hydraulic pump
8.
belt tension by sliding the hydraulic pump in the mount-
ing slots. Tighten bolts.
Replace belt guard.
9.
Depress belt engagement pedal, start engine, engage 10.
drive belt, and test unit. Readjust pulleys and belt ten-
sion if needed.
If the chipping anvil edge is damaged or worn unevenly,
remove the three bolts holding the anvil and use one of the
other three edges. Adjust for correct measurement.
4.4 SeTTing blade clearance (conT.)
Figure 4.3, Drive belt