Echo 72620 - Manual (Page 18)

6 INCH CHIPPER 14
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
Rotor Housing
Chipper Anvil
Spacer
Figure 5.2, Chipping anvil bolts
5.6 adJusTing/rePlacing drive belT
Check the condition of the drive belt annually or after ev-
ery 25 hours of operating, whichever comes first. If the
belt is cracked, frayed, or worn, replace it. To replace or
adjust drive belt, proceed as follows:
Shut off engine and disconnect spark plugs. 1.
Remove belt guard. 2.
Remove the hydraulic pump belt by loosening the bolts 3.
on the hydraulic pump (for hydraulic feed units only).
Figure 5.3, Belt tension
Figure 5.4, Chipper pulley system
5.5 seTTing blade clearance
1. Lift rotor access cover and expose rotor. Loosen the
three 1/2 inch bolts that hold the chipper anvil to the
frame.
2. Measure the amount of clearance between chipping
blade and chipping anvil from inside of housing.
3. Adjust inward or outward to desired measurement.
4. Tighten bolts on chipping anvil to 75 ft-lbs. and resume
operation.
If the chipping anvil edge is damaged or worn unevenly,
remove the three bolts holding the anvil and use one of
the other three edges. Adjust for correct measurement.
The chipping blades should clear the anvil by 1/16 inch to
1/8 inch. Check the clearance every 8 hours of operation
and adjust if needed. The chipping anvil is reversible. All
four sides of the anvil can be used for chipping.
To adjust the anvil:
Take the tension off the drive belt by depressing the 4.
belt engagement pedal, loosening the engine bolts,
and sliding the engine back. then, remove the drive
belt from pulleys.
Install the new belt on pulleys. Slide engine back into
5.
place and tighten bolts to proper torque.
Check pulley alignment with a straight edge and adjust
6.
if needed.
Check belt tension and adjust if needed. The belt
7.
deflection at the center of the belt should be 7/16"
when a 20 lb. load is placed against the belt (see
Figure 5.3).
Replace hydraulic pump and hydraulic pump belt.
8.
Replace belt guard. 9.
depress belt engagement pedal, start engine, engage 10.
drive belt, and test unit. Readjust pulleys and belt
tension if needed.
SPAN LENGTH
FORCE
20 LBS
7/16" DEFLECTION