Craftsman 79960 Owner's Manual page 34

TROUBLESHOOTING POINTS
PROBLEM
Loss of Vacuum
Unusual Vibrationor Noise
POSSIBLECAUSE
1 Vacuuminletor vacuumhosec_ogged, 1
2 Collectionbagfull 2
3 Discharge openingclogged 3
4 Processing chamber clogged 4
5. Enginenotreachingfull RPM 5
1. Solidobjectjammed in unit 1
2, Chipperbladelooseor damaged, 2,
3 Rotorassembly out of baiance, 3
4 Chipper b ladetoanvilclearance incorrect 4
5 Engine cylindershaftor crankshaftisbent 5
or damaged
6 Looseenginemountingbofts 6
7, Looseor m{ssingbolts on unit, 7
8, Engine shaftbearingsdamaged 8
CORRECTION
Checkfor and removeanyobstruction
(Page 26)
Remove and emptybag(Page12)
Remove collectionbagto clean
opening (Page12)
Check for andremove any obstruction
(Page26),
See"Engine RunsPoorly"at beginning
of chart,
Checkfor and remove anyobstruction
SeePage 26.
Tightenor replace(Page 30)
Contact S earsService Center
Contact S earsService Center(correct
clearance is 030"-,090")
ContactSearsService Center
Tightenbolts (Page29)
Tighten or replace bolts (Page29)
ContactSearsService Center
34