Drive Belt Adjustment - Echo 77412 Owner's Manual

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.

4.4 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:
4.4.1 engine modelS
1. place the chipper engagement lever in the START
position.
2. Shut engine off.
3. Disconnect battery cables (electric start models).
4. Remove the seven 5/16" x 3/4" bolts securing the
belt shield to the shield weldment. Remove the belt
shield.
5. To increase tension on the belt, do the following:
5a. Loosen the four carriage bolts attaching the
engine plate to the trailer.
5b. Locate the two 5/16" x 3" bolts and 5/16"
flange nuts located on the side of the chip-
per between the trailer and the engine plate
(Figure 27).
5c. Tighten both 5/16" bolts equally to move the
engine away from the chipper housing until
the belt deflection is 7/16" when a 20 lb. load
is placed against the belt (Figure 28).
5d. Tighten the four carriage bolts securing the
engine plate to the trailer.
5e. Tighten both 5/16" flange nuts to ensure the
proper deflection is maintained.
6. To loosen tension on the belt, do the following:
6a. Loosen the four carriage bolts attaching the
engine plate to the trailer.
6b. Loosen both 5/16" flange nuts.
6c. Loosen both 5/16" x 3" adjustment bolts
equally and push the engine plate against the
bolts. Loosen bolts until the belt deflection is
7/16" when a 20 lb. load is placed against the
belt (Figure 28).
6d. Tighten the four carriage bolts securing the
engine plate to the trailer.
6e. Tighten both 5/16" flange nuts to ensure the
proper deflection is maintained.
26
Warning
7. 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 deflection is achieved.
8. Replace the belt if no adjustment is left (Section
4.5).
9. Reinstall the belt shield.
4.4.2 PTo modelS
1. move the engagement lever to the RELEASE posi-
tion.
2. Disengage pTO and shut off tractor engine.
3. Remove the pTO shaft from the tractor and disconnect
from the 3 point hitch.
4. move the engagement lever to the CHIppING posi-
tion.
5. Remove the 5/16" bolts to take off either the front or
rear belt shield.
6. Either tighten or loosen the eyebolt at the base of the
idler until the belt deflection is 7/16" when a 20 lb. load
is placed against the bolt.
7. Reinstall belt shields.
4.5 INCH CHIPPER
Figure 27, adjustment bolts
Figure 28, belt tension