Product Manual

51
Problem Possible Cause Possible Solution
Piston rings damaged or worn
(broken, rough, or scratched).
Excessive end gap or side
clearance. Piston rings not
seated, are stuck in grooves or end
gaps not staggered.
Install new rings.
Cylinder or piston scratched, worn,
or scored.
Repair or replace as required.
Connecting rod, piston pin, or
crank wrist pin bearings worn or
scored.
Inspect all. Repair or replace as
required.
Crankshaft seal worn or crankshaft
scored.
Replace seal or crankshaft
assembly.
Worn cylinder fi nish. Deglaze cylinder with 180 grit fl ex-
hone.
Fittings not tight enough or leaking. Warning drain air before tightening:
tighten fi ttings where air can not be
heard escaping. Check joint with
soap solution. Do not overtighten.
Possible defective reed valve.
(Hand Carry Units)
Remove pump head and inspect
valve plate and (reed) valve. Clear
or replace valves as required.
Air compressor on unlevel surface. Do not incline the air compressor
more than 10° in any direction
while running.
Crankcase overfi lled with oil. Drain oil. Refi ll to proper level with
Jenny Ultimate Blue Synthetic Oil.
Moisture in discharge air. Condensation in air tank caused by
high level of atmospheric humidity.
Drain air tank after every use.
Drain air tank more often in humid
weather and use an air line fi lter.
Unit located in damp or humid
location.
Relocate unit.
Moisture in crankcase or “milky”
appearance in petroleum lubricant
or rusting in cylinders.
Extremely light duty cycles. Run unit for longer duty cycles
Compressor check valve leaky,
broken, carbonized or loose.
Clean or replace as required.
Inspect valves.
Piston rings damaged or worn
(broken, rough, or scratched).
Excessive end gap or side
clearance. Piston rings not
seated, are stuck in grooves or end
gaps not staggered.
Install new rings.
Cylinder or piston scratched, worn,
or scored.
Repair or replace as required.
Worn cylinder fi nish. Deglaze cylinder with 180 grit fl ex-
hone.