Echo CH45540 Owners Manual v.5 - Manual (Page 17)

4.5 INCH CHIPPER
13
ENGLISH
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
REAR DRIVE BELT
1. Move the engagement lever to the RELEASE
position.
2. Disengage PTO and shut off tractor engine.
3. Remove the PTO shaft from the tractor and disconnect
from the 3 point hitch.
4. Remove the forward belt shield by removing the eight
5/16 x 3/4" bolts and washers securing the shield to
the chipper housing.
5. Loosen the eye bolt to release tension on the belt
(Figure 5.6).
6. Remove the 3/8 x 3-1/2" hex bolt, washer and nut
securing the idler pulley to the idler weldment. Remove
the idler pulley.
7. Remove the 3/8 x 4" hex bolt, washers, spacers and
nylock nut securing the idler weldment to the chipper
housing. Move the idler weldment out of the way.
8. Remove the old belt and install the new belt.
9. Reattach the idler weldment to the chipper housing.
10. Reattach the idler pulley to the idler weldment.
11. Tighten the eye bolt until the belt deflection is about
7/16" when a 20 lb. load is placed against the belt.
12. Reinstall the forward belt shield using eight 5/16 x 3/4"
bolts and washers.
Figure 5.6, Rear belt drive replacement
REMOVING THE OLD ROTOR BEARINGS
1. Move the engagement lever to the RELEASE
position.
2. Disengage PTO and shut off tractor engine.
3. Remove the front belt shield.
4. Remove the front bearing snap ring. Then, remove the
1/2 x 1-1/2" hex bolts that connect the front bearing to
the bearing support weldment.
5. Take off the bearing support weldment by removing
four 3/8" nylock nuts.
6. Remove the front bearing snap rings and loosen the
bearing set screw.
7. Slide the front bearing off the rotor shaft.
8. Remove the 3/8 x 3-3/4" hex bolt, washers and nylock
nut securing the idler pulley to the idler bracket. Remove
the idler pulley.
9. Remove the drive belt from the pulleys.
10. Using the push bolts from the bushing, remove the
sheave and bushing from the rotor shaft.
11. Remove the 1/2" centerlock nuts holding the rear
bearing to the chipper frame.
12. Remove the bearing snap rings and loosen the set
screw. Slide the bearing off the shaft.
5.9 DRIVE BELT REPLACEMENT (CONT.)
5.10 REPLACING THE ROTOR BEARINGS
10. Reattach the idler pulley to the idler bracket.
11. Tighten the eye bolt until belt deflection is 7/16" when a
20 lb. load is placed against the belt (Figure 5.4).
12. Slide the bearing support weldment onto the rotor
shaft. Secure the weldment to the chipper housing
with four 3/8" x 1" carriage bolts, washers and nylock
nuts. Attach the front bearing to the weldment with two
1/2 x 1-1/2" bolts, washers and nuts. Tighten bearing
bolts to 120 ft-lbs.
13. Reinstall bearing snap ring.
14. Reinstall the front belt shield using four 5/16 x 5/8"
hex bolts, four 5/16 x 3/4" hex bolts and eight 5/16"
flat washers.