SDI-W
Feb ‘19
- 17 -
Trouble Shooting Guide (cont’d)
Condition:
Cause:
Suggested Correction:
C. Excessive Noise.
Loose Beltguard, Flywheel or Motor Pulley.
Loose Valve in the Cylinder Head.
If noisy only during start-up, check for loose
Belts.
Unit not installed level.
Improper level or grade of oil in Pump.
Carbon or other foreign material on Piston
head.
Normal sound amplified through floor or
carried through remote air intake, when
used.
If the Pump is knocking, and cannot be
attributed to any of the above, the Bearings
in the Pump may be worn.
Tighten as required.
Inspect the Valves. Ensure they are seated
properly in the Cylinder Head. Reinstall, making
sure that you re-torque as necessary.
Tighten Belts until no slippage is apparent.
Ensure the Unit is mounted level. Use Vibration
Pads.
Use correct DV Systems oil, and check that
level is correct.
Clean top of Piston. Check Cylinder walls for
scoring.
Mount Unit on Vibration Isolators. Insulate
remote intake piping from building.
Worn Main Bearings can usually be detected by
noticeable end play on the Flywheel. Replace
the Main Bearings.
Worn Connecting Rod Bearing Inserts can be
detected by removing a Valve and watching the
Piston while moving the Flywheel by hand. If the
Flywheel can be moved at mid-stroke without
the Piston moving, the Bearing Inserts or
Connecting Rod may need to be replaced.
D. Oil Passing Downstream
of Unit and Excessive
Carbon Build-up.
Ambient temperature is too high.
Little or no air circulation around and over
Unit.
High percentage of running time.
Obstructed Air Filter.
Too much oil in the Pump.
Using wrong type of compressor oil.
Worn Valves.
Worn Piston Rings.
Introduce cool air, better air flow, or move Unit
to cooler location.
Check the air circulation around the Unit.
Ensure Flywheel rotation is correct, and there is
18” minimum around Unit.
Check for air leaks. If no air leaks are present,
the Compressor may be too small for the
application.
Clean or replace as necessary.
Reduce the amount of oil in the Pump.
Change to the factory recommended oil.
Check and replace as necessary.
Replace Piston Rings as necessary.
