17MAINTENANCE continued
17.1IMPELLER REMOVAL continued
18. If chipper blade properly clears anvil surface, proceed to step . If not, return to (step 14) and add or subtract shim washers as needed to obtain a correct gap.
19.Reinstall engine and impeller onto housing in reverse order of removal.
20.Before connecting spark plug wire, slowly pull engine starting rope to insure that impeller rotates freely.
21. Reinstall spark plug wire.
| fig. 6 |
| fig. 7 |
17.2 |
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| Maintenance Schedule |
| Follow these hourly |
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| maintenance intervals. | |
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| Maintenance Operation | Every | Every 5 hrs |
| Use | or (Daily) | |
Engine (See Engine Manual)
Check for excessive vibration
Clean Debris Bag
Check bag strap tightness
Inspect for loose parts
Inspect for worn or damaged parts
17.3DRIVE
Chains are normal replaceable wear items. A new chain should not be used on worn sprockets. Sprockets should be replaced when replacing chains.
Stop engine and disconnect spark plug wire before making adjustments.
INSPECTING DRIVE
1.Remove chain guard
2.Inspect chains, sprockets, belt, and pulleys for wear and replace as required
3.Inspect chains for lubrication and lubricate as required
4.Check chain tension. A properly tensioned chain will deflect about 1/8” midway between the sprockets when light and pressure is applied. If adjustment is required see Replacing and adjusting chairs.
5.Check clutch adjustment. When properly adjusted, operating the clutch at the handle will move the idler pulley down such that a gap of
6.Replace guard after inspection.
CHAIN REPLACEMENT
When replacing always replace both chains even if only one appears worn.
1.Remove chain guard
2.Loosen (4) carriage bolts that hold the jackshaft bearings in place.
3.Slide the jackshaft down and back toward the engine to loosen the chains.
4.Remove nuts that hold the front wheels.
5.Slip chains off the small sprockets on the jackshaft and slide the wheel and chain off each side.
6.Replace the chains on the wheels and reinstall them on the axles.
7.Slip chains over the small sprockets on the jackshaft.
8.Adjust chains for proper tension (see below)
9.Check clutch for proper operation and adjust if required.
CHAIN ADJUSTMENTS
1.Loosen (4) carriage bolts that hold jackshaft bearing on place.
2.Pull up on jackshaft to draw chains tight
3.While holding chains tight rotate the jackshaft back toward the engine slightly so that there is no tension on the belt. NOTE: If the jackshaft is set too far forward the belt will not clutch or release properly during use.
4.With jackshaft properly positioned tighten (4) carriage bolts to lock it in place.
5.Rotate wheels by hand and check chain tension and align- ment.
6.Readjust as required.
7.Replace guard.
CLUTCH ADJUSTMENT
1.Remove guard.
2.To increase belt tension (drive will not engage) loosen jam nuts that hold the treaded adjuster on the clutch cable.
3.Slide the adjuster toward the rear of the unit about ¼” and retighten the jam nuts, to secure it in place.
4.Test clutch operation and readjust as required
5.To decrease belt tension (drive will not disengage or free wheel) loosen jam nuts that hold the treaded adjuster on the clutch cable.
6.Slide the adjuster toward the front of the machine about ¼” and retighten the jam nuts to secure the cable in place.
7.Test clutch operation and readjust as required.
8.If unit will not free wheel with clutch disengaged loosen (4) carriage bolts and slide the jackshaft back 1/8” and retighten
carriage bolts.
Threaded | Idler | Carriage | |
Pulley | Bolt | ||
Adjuster | |||
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Part No. 890604 | Page 9 of 12 | Form No. F021602C |
