Echo 72928 Owners Manual v.7 - Manual (Page 23)

9 INCH CHIPPER 19
SERVICE & MAINTENANCE
4.6 rePlaCing Drive belT
4.5 Clearing PluggeD roTor
Stop engine and wait for all moving parts to stop. 1.
Remove bolts and lift rotor access cover. 2.
Remove the lock pin from storage position (see 3.
Figure 4.3)
Turn check valve clockwise to engage the pump.
4.
Pump the handle to raise the feed roller until the lock pin 5.
position aligns with one of the support bracket holes.
Secure the position by putting the lock pin through the
6.
support bracket and lock pin position.
Clean the debris out of the feed roller housing. Turn
7.
the rotor by hand to be sure it is free to rotate.
Remove lock pin and put it back into its storage po-
8.
sition. leaving THe loCk Pin in anY oTHer
PoSiTion maY inTerfere WiTH feeD roller
oPeraTion.
Turn the check valve counterclockwise to disengage
9.
the pump and lower the jack.
Close rotor access cover and secure with bolts.
10.
Depress belt engagement pedal, start engine, and 11.
resume operation.
Warning
If the machine becomes plugged, shut off engine and
allow the machine to come to a complete stop before
cleaning debris.
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 4.4).
Take the tension off the drive belt by depressing the
4.
belt engagement pedal. Remove the drive belt from
pulleys.
SPAN LENGTH
FORCE
20 LBS
7/16" DEFLECTION
Figure 4.5, Belt tension
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 deflec-
7.
tion at the center of the belt should be 7/16" when a 20
lb. load is placed against the belt (see Figure 4.5).
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.
Tighten bolts on anvil to 75 ft-lbs. Make sure all blades 10.
clear the anvil by 1/16" to 3/16".
Remove lock pin and put it back into its storage po-
11.
sition. leaving THe loCk Pin in anY oTHer
PoSiTion maY inTerfere WiTH feeD roller
oPeraTion.
Turn the check valve counterclockwise to disengage
12.
the pump and lower the jack.
4.4 SeTTing blaDe ClearanCe (ConT.)
Figure 4.4, Drive belt
FEED
ROLLER
JACK
CHECK
VALVE
LOCK PIN
STORAGE
POSITION SUPPORT
BRACKET
LOCK PIN
POSITION
Figure 4.3, Feed roller jack