Echo 74520 Owners Manual v.2 - Manual (Page 26)

Page 22 5" Chipper W/Hyd Feed Owners Manual
Service and Maintenance
5.8 REMOVING ROTOR 5.9 TRAILER SERVICE TIPS
5.10 ADDITIONAL SERVICE AND
MAINTENANCE TIPS
1. Service engine according to engine owners manual.
2. Every 10 hours of operation, all bolts and other
fasteners should be checked for correct torque.
3. Remove the discharge screen (all models) daily to
avoid material buildup under normal mounting sur-
faces. Clean away material and reinstall screen.
4. The chipper has greaseable bearings and pivots that
require grease every 50 hours:
A. Two bearings on the rotor shaft (All models).
B. One grease zerk on the discharge chute (All
models).
C. One pivot on the clutch pedal (Model 74520).
D. Two bearings on the jack shaft (Model 74554).
E. Two bearings on the PTO shaft shield (Model
74554).
F. One grease zerk on the idler pivot (Model 74554).
1. Remove the one 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 or five 5/16 inch bolts).
3. Lift belt idler pulley off drive belt and remove belt from
pulleys.
4. Remove the bushing and pulley from the rotor shaft
using the push bolts from the bushing.
5. Remove the two 1/2 inch bolts on each rotor bearing.
6. Pound 1/4" roll pin out of the rotor shaft on front
bearing.
7. Lift the rotor assembly completely out of the frame
with an overhead hoist or lifting device. The complete
rotor assembly is 140 lbs.
8. Remove both bearings with a puller when the rotor
assembly is out of the frame and place new bearings
on rotor shaft.
9. Replace roll pin with a new 1/2" x 2" pin, P/N 15137.
10. Return the complete rotor assembly to the chipper
frame with an overhead hoist or lifting device.
11. Slide rotor back until front roll pin is tight against the
front bearing.
12. 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.
13. Check and adjust chipper anvil if needed. Lock rear
bearing.
14. Slide bushing onto shaft with flange against bearing
and lock bushing to shaft.
15. Attach large pulley to bushing.
16. Replace drive belt on pulleys and lower belt idler.
Check alignment of pulleys and adjust engine if
needed.
17. 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 Fig. #11).
18. Close cover and replace bolts.
19. Replace belt guard and resume operation.
20. Depress foot clutch pedal, start engine, release foot
clutch pedal to engage belt, and test unit. Readjust
pulleys and belt tension if needed.
1. Check wheel bolt torque every 10 hours of towing use.
2. Check air pressure in tires every 10 hours of towing.
3. Check and repack wheel bearings with grease every 12
months.
4. Connect safety chains when towing.
5. Tighten and secure trailer hitch bolts.
6. Check trailer lights.