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11.3 TABLE 3 TROUBLE SHOOTING GUIDE FOR AIR MOTORS
SYMPTOM
REASON LOW TORQUE LOW SPEED
WON’T RUN
AT ALL
RUNS HOT
RUNS GOOD THEN
SLOWS DOWN
DIRT OR FOREIGN MATERIAL X X X
INTERNAL RUST X X X
MISALIGNMENT X X X X X
INSUFFICIENT AIR PRESSURE X X
AIR SUPPLY LINE TOO SMALL
X
RESTRICTED EXHAUST
X
X
POOR LUBRICATION X X X X
JAMMED MACHINE
X
X X
X
AIR COMPRESSOR TOO SMALL
X
X
AIR COMPRESSOR TOO FAR FROM UNIT
X
X
11.4 ADDITIONAL TROUBLE SHOOT INFORMATION
11.4.1. Reduced cooling capacity
1) Check fan rotation. Air motors and some electric motors are reversible rotation. Confirm
correct fan rotation.
2) Check fan speed. Adjust air pressure as shown in Section 11.2.
3) Check Aftercooler heat exchanger cooling surface. Accumulated dirt and grime will reduce
air flow. Clean surface as detailed in Section 8.5.3.
11.4.1. Reduced air flow
1) Clogged aftercooler radiator. Clean internally as detailed in Section 8.5.3.
2) ADS Systems only. Fused deliquescent tablets can reduce air flow through separator tank.
Break apart fused tablets using long rod (see Section 8.6).
3) ADS Systems only. Desiccant tablet particles can collect within the marble bed and restrict
flow. Clean out small particles from marble bed.
4) ADS Systems only. Too small of desiccant or deliquescent tablet size can collect within
marble bed (#10) and restrict air flow. Minimum tablet size is 5/8” x 3/4".
5) Reduced port ball valves will lessen air flow capacity in and out.
11.4.2. Excessive vibration
1) Damaged cooling fan such as bent or broke blade can cause vibration from imbalance and
may result in further equipment damage. Inspect fan and replace if damaged.
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