Echo CH911DH Owners Manual v.4 - Manual (Page 20)

9 INCH CHIPPER 16
SERVICE & MAINTENANCE
BEFORE INSPECTINg OR SERVICINg ANy PART OF THIS MACHINE, SHuT OFF POWER SOuRCE,
AND MAkE SuRE All MOVINg PARTS HAVE COME TO A COMPlETE STOP.
Warning
5.7 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 Figure 3.
5.3)
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 the
7.
rotor by hand to be sure it is free to rotate.
Remove lock pin and put it back into its storage position.
8.
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.
FEED
ROLLER
JACK
CHECK
VALVE
LOCK PIN
STORAGE
POSITION SUPPORT
BRACKET
LOCK PIN
POSITION
Figure 5.3, Feed roller jack
5.8 rePlaCing roTor bearings
Remove the two retaining bolts holding the access 1.
cover to main frame assembly. Tilt access cover over
to allow rotor access.
Remove large belt guard.
2.
loosen bolts on hydraulic pump and remove hydraulic 3.
pump belt.
Take the tension off the drive belt by depressing the belt
4.
engagement pedal. Then, remove the drive belt from
pulleys. using the push bolts from the bushing, remove
the bushing and pulley from the rotor shaft.
Remove the four 1/2" bolts on each rotor bearing and
5.
take off the sensor bracket.
using an overhead hoist or lifting device, lift the rotor
6.
assembly completely out of the frame. The complete
rotor assembly is 275 lbs.
Once the rotor assembly is out of the frame, remove
7.
both collars and bearings. Place new bearings on rotor
shaft. Reinstall front collar onto shaft.
use the overhead hoist or lifting device to return the
8.
complete rotor assembly to the chipper frame.
Slide rotor back until the front collar is tight against the
9.
front bearing. Attach the front bearing to the frame with
four 1/2" bolts. Tighten bolts to 75 ft-lbs. Check and
adjust chipper anvil if needed. Bolt the rear bearing to
chipper frame. Reattach sensor bracket to rear bearing
using a top bearing bolt.
Slide rear collar on shaft against rear bearing. Make
10.
sure the collar bolt lines up with the sensor. Slide
bushing onto shaft with flange against collar and
lock bushing to shaft. Attach large pulley to bushing.
Replace drive belts on pulleys.
Check pulley alignment with a straight edge and adjust
11.
engine if needed. Check belt tension. Belt deflection
at the center of the belt should be 7/16" when a 20 lb.
load is placed against the belt (Figure 5.5).
Replace hydraulic pump belt. Readjust hydraulic
12.
pump belt tension by sliding the hydraulic pump in the
mounting slots. Tighten bolts.
Replace belt guard and resume operation.
13.
Depress belt engagement pedal, start engine, engage 14.
drive belt, and test unit. Readjust pulleys and belt
tension if needed.
CauTion
Failure to maintain proper fastening torque on bolts
may result in damage to the chipper and/or personal
injury!