Problem
| Action
|
Loose drive gear or pulley
|
Important: Do not back off the crankshaft nut in order to align the cotter pin and
the castellated nut. Some compressors do not use castellated nuts. Do not
use impact wrenches.
| • | The pulley on gear must be completely seated and the crankshaft
nut must be tight. |
| • | If the compressor crankshaft surface or the keyway is damaged,
the drive components are loose. |
| • | If damage to the compressor crankshaft is detected, replace the
compressor. |
| • | When installing the drive gear or pulley, torque the crankshaft
nut to the appropriate torque specifications. |
|
Excessively worn
drive couplings or gears
|
- Inspect drive gear and couplings and engine for excessive wear
.
- Replace as necessary.
Non-metallic gears should
be replaced when the compressor is changed.
|
Compressor cylinder head or discharge line restrictions
|
- Inspect the compressor discharge port and discharge line for carbon
build-up.
- If carbon is detected, check for proper cooling to the compressor.
- Inspect the discharge line for kinks and restrictions.
- Replace discharge line as necessary.
|
Worn or burned
out bearings
|
- Check for proper oil pressure in the compressor.
Specification
| • | The minimum required oil pressure with the engine idling is 103 kPa
(15 psi). |
| • | The minimum required oil pressure with the maximum governed engine
RPM is 103 kPa (15 psi). |
- Check for excessive oil temperature.
Specification
The temperature should not exceed 116°C (240°F).
|
Faulty compressor
| Replace or repair the compressor after determining none of the preceding
installation defects exist.
|