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Part No 840186 18 Form No F030409A
MV650H PUSH Vacuum Owner’s Manual
MAINTENANCE
PERIODIC MAINTENANCE
Periodic maintenance should be performed at the following intervals:
Maintenance Operation Every Use Daily or Every 5
Hours
Every 25 Hours Every 50
Hours
Every 100-150
Hours
Inspect for worn or damaged parts.
z
Check for excessive vibration
z
Inspect for loose parts.
z
Clean Debris Bag
z
Lubricate throttle control cable and linkage.
NOTE: Use white lithium grease or equivalent
z
IMPELLER REMOVAL
READ all safety instructions before servicing unit.
DISCONNECT spark plug wire before servicing unit.
Tools required:
- 1/2” socket, 3/8” drive and 3/8” ratchet
- drive extension, 3/8” drive
- universal joint, 3/8” drive
- pry bar or long screwdriver
- jack stands or similar device adequate to support weight of machine.
1. Wait for engine to cool and disconnect spark plug.
2. Drain fuel and oil from the engine.
3. Remove engine, impeller and mounting plate by removing bolts around outside of housing.
4. Leaving engine fastened to plate, remove impeller bolt and lock washer and slide impeller off crankshaft
(A puller may be required). CAUTION: Do not drop impeller.
5. If impeller does not slide off crankshaft, place two crowbars between impeller and housing on opposite
sides. Pry impeller away from engine until it loosens. Using a penetrating oil can help loosen a stuck
impeller.
6. If the impeller cannot be loosened, obtain a 3/8-24x3 ¾” longer bolt of the same diameter and thread type
as the impeller bolt. Invert engine and impeller and support engine above ground to prevent recoil
damage. Thread longer bolt by hand into the crankshaft until bolt bottoms. Using a suitable gear or
wheel puller against the bolt head and the impeller back-plate (near the blades), remove impeller from
shaft.
7. To reinstall impeller, use a new impeller bolt and lockwasher
8. Tighten impeller bolt. Torque impeller bolt to 33-38 Ft. Lbs. (45-51 N.m).
9. Reinstall engine, impeller, and mounting plate onto housing in reverse order of removal.
10. Before connecting spark plug wire, slowly pull engine starting rope to insure that impeller rotates freely.
11. Reconnect spark plug wire.