Echo 73413S Owners Manual v.2 - Handbuch (Seite 14)

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3.4 Adjusting Drive Belt
Check the condition of the drive belt annually or after
every 25 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. Disengage PTO and shut
tractor engine off on PTO models.
2. Remove large belt guard (three 5/16 inch bolts).
3. Adjust the eyebolt that anchors the idler spring to
adjust the belt tension. Tighten the eyebolt until the
belt deflection at the center of the belt is 7/16"
when a 20 lb. load is placed against the belt (see
figure 5.7, pg. 17).
4. Replace belt guard.
5. Test belt for looseness. Replace the belt if no
adjustment is left.
3.5 Replacing Drive Belt
1. Remove large belt guard (three 5/16" bolts).
2. Loosen eye bolt and push 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. Check belt tension before start-up. Adjust the
eyebolt that anchors the idler spring to adjust the
belt tension. Tighten the eyebolt until the belt
deflection at the center of the belt is 7/16" when a
20 lb. load is placed against the belt (see figure 5.7,
pg. 17). If unable to attain proper tension, the
engine can be moved on the mounting stand.
5. Replace belt guard.
6. Test unit. Readjust pulleys and belt tension if
needed.
3.6 Clearing Plugged Rotor
If the machine becomes plugged, depress foot clutch
pedal, shut off the engine, and allow the machine to
come to a complete stop before clearing debris.
Warning: Do not operate the machine without
proper guards and screens in place.
Feeding too much chipable material at once may plug
the chipper. To clear plugged rotor, proceed as follows:
1. Depress foot clutch pedal and stop engine (Disen-
gage PTO and stop tractor engine on PTO models).
Release foot clutch pedal when engine is stopped.
2. Remove the one 3/8" retaining bolt holding the
access cover to the main frame assembly.
3. Lift up rotor access cover.
4. Clean the debris out of the chipper rotor. Release
idler and turn the rotor by hand to be sure it is free
to rotate.
5. Close rotor access cover and replace bolts.
6. Depress foot clutch pedal, and start engine. Release
foot clutch pedal when engine is running to engage
drive belt (engine models). Resume operation.
3.7 Repairing or Replacing Rotor
Bearings
1. Remove the 3/8 inch retaining bolt holding access
cover to main frame assembly. Tilt access cover
over to allow rotor access.
2. Remove large belt guard (three 5/16 inch bolts).
3. Lift belt idler pulley off drive belt and remove belt
from pulleys. Using the push bolts from the bushing,
remove the bushing and pulley from the rotor shaft.
4. Remove the two 1/2 inch bolts on each rotor
bearing. Pound 1/4" roll pin out of the rotor shaft on
front bearing.
5. Using an overhead hoist or lifting device, lift the
rotor assembly completely out of the frame. The
complete rotor assembly is 140 lbs.
6. Once the rotor assembly is out of the frame, remove
both bearings with a puller and place new bearings
on rotor shaft. Replace roll pin with a new 1/2 x 2"
pin (P/N 15137).
7. Use the overhead hoist or lifting device to return the
complete rotor assembly to the chipper frame.
8. Slide rotor back until front roll pin is tight against
the front bearing. Lock the front bearing and install
the four 1/2 inch bolts on each bearing to secure
them to the frame. Tighten bolts to 75 ft. lbs. Check
and adjust chipper anvil if needed. Lock rear
bearing.