Craftsman 919.157251 Owner's Manual page 16

PROBLEM
Excessive belt wear.
CAUSE
Loose belt.
Pulley misalignment.
Loose pulley.
Squealing sound. Loose belt.
There is no oil in the compressor.
Engine will not run The stop switch is in the "stop" position.
The gasoline tank is empty.
The choke is not set properly.
Excessive vibration.
Improper fuel mixture,
Air tank pressure is too high,
The unloading valve toggle lever is in a
horizontal position.
Stiffener bar or engine and compressor
mounting screws are loose.
CORRECTION
Adjust tension per instruction on page 12, step 5.
Adjust pulleys per instructions on page 13.
Check for worn keyway or pulley bore. Also check
for bent motor shaft. Replace parts if necessary.
Adjust belt tension per instructions on page 12,
step 5.
Add oil to top of fill hole in base.
Move the stop switch away from the spark plug.
Fill the tank with gas.
Re-set the choke. Remember, a warm engine
requires less choking that a cold engine.
Adjust the fuel mixture,
Open the ball valve and reduce tank pressure to less
than 40 psig.
Place unloading valve toggle lever in a vertical
3osition.
EXCESSIVE VIBRATION COULD
WEAKEN THE AIR TANK AND CAUSE IT
TO RUPTURE OR EXPLODE. STIFFENER
BAR NUTS AND MOUNTING SCREWS
MUST BE KEPT TIGHTENED. NEVER
OPERATE THE OUTFIT UNLESS
EQUIPPED WITH THE STIFFENER BAR
AND RUBBER FEET.
16 - ENG
D20396 Rev 0 2/16/00