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MAINTENANCE
P
M
ERIODIC
AINTENANCE
Periodic maintenance should be performed at the following intervals:
Maintenance Operation
Inspect for loose, worn or damaged parts.
Clean Debris bag
Check bag strap tightness
Engine (See Engine Manual)
Check for excessive vibration
IMPELLER REMOVAL
1. Wait for engine to cool and disconnect spark plug.
2. Drain fuel and oil from engine.
3. Remove bag and remove upper handle.
4. Invert and support machine without engine touching to prevent damage to recoil starter.
5. Remove rear wheels (item 11), and bolt axle bracket (item 48), [one each side, closest to middle inlet
plate (item 3)], washer (item 57) and nut (item 49).
6. Remove intake wrapper (item 2), assembly and middle inlet plate (item 3), eight screws and eight nuts.
7. Remove impeller bolt (item 37) and lock washer (item 36).
8. Lift impeller free of engine.
9. If impeller does not remove easily, obtain a 1" (25.4mm) longer bolt of the same diameter and thread
type as the impeller bolt. Thread longer bolt by hand into crankshaft until bolt bottoms. Using a suitable
gear or wheel puller against the bolt head and impeller back-plate (near the blades), remove impeller from
shaft.
10. Reinstall new impeller, impeller bolt and lock washer in reverse order. Torque impeller bolt to 33-38
ft-lbs (45-52 N.m).
Troubleshooting
Problem
Abnormal vibration.
Will not vacuum or has poor
vacuum performance
Engine will not start.
Engine is locked, will not pull
over.
Nozzle scrapes ground in
lowest height setting.
Part No 901015
LB Owner's Manual
Possible Cause
· Loose or out of balance impeller or
loose engine
· Dirty debris bag. Nozzle height set too
high or low. Hose kit cap missing.
Clogged nozzle or exhaust. Excessive
quantity of debris.
· Throttle in off position. Out of gasoline.
Bad or old gasoline. Sparkplug wire
disconnected. Dirty air cleaner
· Debris locked in impeller. Engine
problem.
Nozzle height out of adjustment
Every Use (daily)
Every 5 hrs (daily)
· Check impeller and replace if required.
Check engine
· Clean debris bag. Shake bag clean or
wash. Adjust nozzle height. Check for
hose kit cap. Unclog nozzle or exhaust.
Allow air to feed with debris
· Check throttle, Connect spark plug wire.
Clean or replace air filter. Or contact a
qualified service person.
· See page 10. Contact a engine service
dealer for engine problems
Adjust nozzle height (See Nozzle height
fine adjustment for hard surfaces on
page 10
7
Solution
Form No F051513A
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