Echo CH611DH Owners Manual v.5 - Manual (Page 26)

22 6 INCH CHIPPER
SERVICE & MAINTENANCE
Before inspecting or servicing any part of this machine, shut off power source,
disengage the hydraulics, and make sure all moving parts have come to a complete stop.
WARNING
Figure 5.9, Belt tension
5.10 replacinG The Drive BelT
Figure 5.8, Unscrew the bolt to remove the idler pulley
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. lift up the engine hood.
2. Remove idler pulley by loosening the 1/2” mounting
hardware.
3. lift belt idler pulley off the idler arm weldment.
4. Remove the drive belt from the pulleys and discard.
5. Inspect pulleys for wear. Replace the pulleys if they
are cracked or worn so that the belt contact area is not
smooth and flat.
IDLER PULLEY
HARDWARE
SPAN LENGTH
FORCE
20 LBS
7/16" DEFLECTION
5.11 replacinG hYDraulic Drive BelT
1. Remove drive belt according to instructions in Section
5.10.
2. loosen the two bolts under the pump. Access is from
underneath chipper (see figure).
3. Slide the pump up, remove the loosened hydraulic belt
and discard.
4. Install the new hydraulic belt.
5. Replace the drive belt according to directions in Section
5.10.
6. Tighten the nuts on the adjusting bolt to move the
pump mounting bracket. Check belt tension and adjust
if needed. The belt deflection at the center of the belt
should be 7/16" with a 20 lb. load.
7. tighten the mounting bolts on the pump mounting
bracket to the proper torque.
The condition of the hydraulic drive belt should be checked
annually, or after every 25 hours of operation. Replace the
belt if it is cracked, worn, frayed, or stretched.
to replace the belt:
Figure 5.10, Guide for routing belts
6. Install new belt on pulleys and lower belt idler.
7. Reinstall the belt idler pulley into the idler arm weldment
using the 1/2” hardware. Tighten bolt to proper
torque.
8. Check pulley alignment by placing a straight edge across
the face of both pulleys. Adjust the lower (engine) pulley
if necessary to bring them into alignment.
9. Check belt tension and adjust if needed. The belt
deflection at the center of the belt should be 7/16" with
a 20 lb. load. If necessary, adjust spring tension.
10. Shut engine hood.