Echo 77412 Owners Manual v.3 - Manual (Page 22)

Crary Bear Cat Owners Manual 20
SERVICE & MAINTENANCE
BEFORE INSPECTING OR SERVICING ANY PART OF THIS MACHINE, SHUT OFF POWER SOURCE,
DISCONNECT SPARK PLUG WIRE FROM SPARK PLUG AND MAKE SURE ALL MOVING PARTS HAVE COME TO A COMPLETE STOP.
WARNING
5.5 DRIVE BELT ADJUSTMENT
Check the condition of the drive belt(s) annually or after every 25
hours of operation, whichever comes first. Replace a cracked,
frayed, worn or stretched drive belt. Only replace drive belt with
original banded type belt. Do not use single type belts. To adjust
the drive belt(s), proceed as follows:
ELECTRIC/RECOIL MODELS
Move the engagement lever to the START position.
Shut engine off.
Disconnect battery cables.
Remove the seven 5/16" x 3/4" bolts securing the belt shield
to the shield weldment. Remove the belt shield.
Loosen the 5/16" bolt attaching the belt guide to the en-
gine.
To increase tension on the belt, do the following:
6a. Loosen the four carriage bolts attaching the engine
plate to the trailer.
6b. Locate the two 5/16" x 2" bolts and 5/16" flange
nuts located on the side of the chipper between the
trailer and the engine plate.
6c. Loosen both 5/16" flange nuts.
6d. Tighten both 5/16" bolts equally to move the engine
away from the chipper housing until the belt deflec-
tion is 7/16" when a 20 lb. load is placed against
the belt (Figure 5.5).
6e. Tighten the four carriage bolts securing the engine
plate to the trailer.
6f. Once the proper deflection is achieved, tighten both
5/16" flange nuts to ensure the proper deflection is
maintained.
If the bolts and nuts between the engine plate and the trailer
cannot be adjusted any further and the tension needs further
adjustment, tighten the eyebolt until the appropriate deflec-
tion is achieved.
Replace the belt if no adjustment is left (Section 5.6).
Tighten the belt guide and reinstall the belt shield.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Figure 5.5 - Belt Tension
Span Length
Force
20 lbs
7/16" Deflection
5.6 DRIVE BELT RELACEMENT
Check the condition of the drive belt(s) annually or after every 25
hours of operation, whichever comes first. Replace a drive belt
that is cracked, frayed, worn, or stretched. Only replace the drive
belt with original banded type belts, do not use single type belts.
To replace the drive belt(s), proceed as follows:
5.6.1 ELECTRIC/RECOIL MODELS
1. Move the engagement lever to the START position.
2. Shut engine off.
3. Disconnect battery cables.
4. Remove the belt guard. Two 5/16" x 1" bolts are located on
each side of the belt guard.
5. Remove the idler pulley.
6. Move the engagement lever to the RUN position.
7. Loosen the two 3/8" x 4-1/2" bolts located in the middle of
the belt guide.
8. Remove the 5/16" bolt attaching the belt guide to the en-
gine.
9. Loosen the bolt attaching the belt guide to the front rotor
bearing. The belt guide should be able to slide up and down
in the slot on the belt guide.
10. Loosen the four carriage bolts attaching the engine plate to
the trailer.
11. Locate the two 5/16" x 2" bolts and 5/16" nuts located on
the side of the chipper between the trailer and the engine
plate.
12. Loosen both 5/16" flange nuts.
13. To release the tension on the belt, loosen both 5/16" x 2" bolts
equally and slide the engine towards the chipper housing.
14. Lift the belt guide away from the belt; remove the old belt
and install the new belt.
15. Adjust the drive belt (Section 5.5).
16. Lower the belt guide and reinstall. The bolt attaching the belt
guide to the front rotor bearing must be torqued to 75 Ft-lb.
17. Move the engagement lever to the START position and
reinstall the idler pulley.
18. Reinstall the belt guard.