Echo 71854 - Manual (Page 20)

PTO CHIPPERS 18
SERVICE & MAINTENANCE
6.3 adJusTing/rePlacing drive belT
6.4 clearing Plugged roTor
if too large of material or too much material is fed into the
chipper, it may become plugged. To clear a plugged rotor,
proceed as follows:
1. disengage PTO and shut off tractor engine.
2. lift 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. replace rotor access cover.
5. Start tractor, engage PTO, and resume operation.
6.5 greaseable bearings
The PTO model has ten grease zerks on it. Minimal periodic
greasing is needed on these points every 50 hours:
four grease zerks on the PTO shaft itself. •
Two greaseable bearings on the rotor shaft. •
Warning
if the machine becomes plugged, shut off the tractor
engine, and allow the machine to come to a complete
stop before cleaning debris. do not operate the ma-
chine without proper guards and screens in place.
check the condition of the drive belt annually or after every
30 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:
disengage PTO and shut off tractor engine. 1.
remove PTO shaft from tractor; disconnect machine 2.
from 3 pt. hitch.
remove round shield connected to belt guard that
3.
covers PTO shaft by removing two 5/16" nuts.
remove belt guard covering pulleys and belts.
4.
remove spring loaded idler pulley off of belts and 5.
remove belt.
install new belt and reverse above instructions to
6.
complete belt replacement.
6.6 rePlacing bearings
1. remove the two 3/8 inch retaining bolts holding access
cover to main frame assembly. Tilt access cover over
to allow rotor access.
2. remove large belt guard (three 5/16 inch bolts).
3. loosen bolts on hydraulic pump and remove hydraulic
pump belt. using the push bolts from the bushing,
remove the bushing and pulley from the rotor shaft.
4. remove idler pulley and belts. using the push bolts
from the bushing, remove the bushing and pulley from
the rotor shaft.
5. remove the four 1/2 inch bolts on each rotor bearing
and remove the punch used to lock the rotor.
6. using an overhead hoist or lifting device, lift the rotor
assembly completely out of the frame. The complete
rotor assembly is 275 lbs.
7. Once the rotor assembly is out of the frame, remove
3/8" bolt and collar from front. remove both bearings
and place new bearings on rotor shaft. replace col-
lar.
8. use the overhead hoist or lifting device to return the
complete rotor assembly to the chipper frame.
9. Slide rotor back until front collar is tight against the
front bearing. lock the front bearing and install the
four 1/2 inch bolts on each bearing to secure them to
the frame. Tighten bolts to 75 ft-lbs. Check and adjust
chipper anvil if needed. lock rear bearing.
10. Slide rear collar on shaft against rear bearing. Slide
bushing onto shaft with flange against collar and
lock bushing to shaft. attach large pulley to bushing.
replace drive belts on pulleys and install idler pulley.
check alignment of pulleys with straight edge and
adjust if needed.
11. close cover and replace bolts.
12. replace hydraulic pump bushing and pulley. replace
hydraulic pump belt. Readjust hydraulic pump belt
tension by sliding the hydraulic pump in the mounting
slots. Tighten bolts.
13. replace belt guard and resume operation.
14. Start tractor engine and engage PTO drive clutch (see
tractor owner's manual). increase engine speed to
rated PTO RPM Position. Test unit; readjust pulleys
and belt tension 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.
6.2 seTTing blade clearance (conT.)
Two greaseable bearings on the bottom jack shaft. •
One on idler arm pivot. •
One on discharge chute. •