Echo CH911DH Owners Manual v.7 - Manual (Page 21)

9 INCH CHIPPER 17
ENGLISH
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
cauTion
Failure to maintain proper fastening torque on bolts
may result in damage to the chipper and/or personal
injury!
5.9 replacinG Drive BelT
Figure 5.4, Drive belt
Figure 5.5, Belt Tension
5.10 chanGe oil
Check the oil level before each use. Change oil as directed
in the engine owner's manual.
SPAN LENGTH
FORCE
20 LBS
7/16" DEFLECTION
Check the condition of the drive belt annually or after every
25 hours of operation, whichever comes first. If the belt is
cracked, worn, frayed, or stretched, replace it. Replace
belt with original banded belt type only. Do not use single
type belts.
To replace the belt:
1. Shut off engine.
2. Remove drive belt shield.
3. Remove the hydraulic pump belt by loosening the bolts
on the hydraulic pump (Figure 5.4).
4. Take the tension off the drive belt by depressing the belt
engagement pedal. Remove the drive belt from pulleys.
9. Slide belt side collar on shaft against belt side bearing.
Make sure the collar set screw lines up with the sensor.
Slide bushing onto shaft with flange against collar and
lock bushing to shaft. Attach large pulley to bushing by
inserting the bolts back into the non-threaded holes.
Tighten equally until snug. Torque bolts to 180 inch-
lbs.
10. Replace drive belts on pulleys.
11. Check pulley alignment with a straight edge and adjust
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. See Adjusting Belt
Tension
12. Replace hydraulic pump belt. Readjust hydraulic
pump belt tension by sliding the hydraulic pump in the
mounting slots. Tighten bolts. (Skip to step 13 if the VIN
number is 5VJAA00178W001015 and above.)
13. Check to make sure you knife to anvil gap is a 1/16”
to your closest blade and torque the anvil bolts to 75
ft-lbs..
14. Replace belt guides and belt guard and resume
operation.
15. Depress belt engagement pedal, start engine, engage
drive belt, and test unit. Readjust pulleys and belt
tension if needed.
5. Install the new drive belt on pulleys.
6. Check pulley alignment with a straight edge and adjust
engine if needed.
7. Check belt tension and adjust if needed. The belt
defelction at the center of the belt should be 7/16" when
a 20 lb. load is placed against the belt. See Figure 5.5.
8. Reinstall hydraulic pump belt. Readjust hydraulic
pump belt tension by sliding the hydraulic pump in the
mounting slots. Tighten bolts.
9. Replace belt guard.
10. Depress belt engagement pedal, start engine, engage
drive belt, and test unit. Readjust pulleys and belt
tension if needed.