TEST OR INSPECTION
1. SLOW PUMPING OR INSUFFICIENT PRESSURE
Step 1. Check for leaks in air lines and fittings.
Tighten fittings or replace leaking parts.
Reduce air use to less than 5 cfm.
Step 3. Check for wrong adjustment of pressure switch.
Adjus t pressure switch to cut in at 160 psi and to cut out at 180 psi. (para 6-14)
Step 1. If unit is new, oil consumption may be high until rings seat.
Wait for rings to seat, then recheck oil consumption.
Step 2. Check for worn or stuck piston rings.
Rings can be replaced by removing head and cylinder.
The pump can stay
mounted on the air tank.
3. COMPRESSOR RUNS NOISY
Step 1. Check for loose mounting bolts or flywheel.
Step 2. Check for foreign matter such as carbon, metal chips, etc. in cylinder.
Step 3. Check if piston extends above cylinder at top of stroke and hits cylinder head.
Add gaskets between crankcase and cylinder. Do not add gaskets between cylin-
der and head since air leaks may occur if more than one gasket is used.
Step 4. Check for end play in crankshaft.
Remove one end cover gasket and reinstall end cover. Do not remove too many