Echo 71825 - Manual (Page 13)

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The four edged chipping blades should clear the chipping anvil located directly
under the chipper chute by 1/16 inch to 1/8 inch. The chipping anvil is
adjustable and reversible.
1. Lift rotor access cover and expose rotor (see figure 7). 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 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.
Check the condition of the drive belt annually or after every 30 hours of
operation, whichever comes first. If the belt is cracked, frayed, worn, or
stretched, replace it. Only replace belt with original banded type belt, do not
use single type belts. To adjust the belt, proceed as follows:
1. Depress foot clutch pedal. Shut engine off and disconnect battery cables.
2. Remove large belt guard (three 5/16 inch bolts).
3. Adjust the eyebolt that anchors the idler spring to adjust belt tension.
Tighten the eyebolt until the belt deflection at the center of the belt is
7/16" when a 20 lb. load is place against the belt (see figure 8).
4. Replace belt guard.
5. Start engine and test belt for looseness. Replace the belt if no adjustment
is left.
1. Remove large belt guard (three 5/16" bolts).
2. Lift belt idler pulley off drive belt and remove drive belt from pulleys.
3. Install new belt on pulleys and lower belt idler. Check alignment of pulleys
and adjust if needed.
4. Adjust the eyebolt that anchors the idler spring to adjust belt tension.
Tighten the eyebolt until the belt deflection at the center of the belt is
7/16" when a 20 lb load is place against the belt (see figure 8).
5. Replace belt guard.
6. Depress foot clutch pedal, start engine, release foot clutch pedal to
engage belt, and test unit. Readjust pulleys and belt tension if needed.
Setting Chipping
Blade Clearance
To Adjust:
Adjusting Drive
Belts
Replacing Drive
Belt
7/16" Deflection
Figure 8