Echo 74520 Owners Manual v.1 - Manual (Page 24)

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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 figure 4, page 19).
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.
The chipper has greaseable bearings and pivots that require grease every 50 hours:
• Two bearings on the rotor shaft (All models).
• One grease zerk on the discharge chute (All models).
• One pivot on the clutch pedal (Model 74520).
• Two bearings on the jack shaft (Model 74554).
• Two bearings on the PTO shaft shield (Model 74554).
• One grease zerk on the idler pivot (Model 74554).
• Check wheel bolt torque every 10 hours of towing use.
• Check air pressure in tires every 10 hours of towing.
• Check and repack wheel bearings with grease every 12 months.
• Connect safety chains when towing.
• Tighten and secure trailer hitch bolts.
• Check trailer lights.
Service and Maintenance-Cont
Greaseable Bearings and Pivots
Trailer Service Tips