Eagle RECIPROCATING, Owner'S Manual

10

Air Leaks

Air leaks are costly, your compressor uses a lot of energy to ensure that a constant storage of high-pressure air is available 

to perform work.

•  If air leaks are detected, rectify the problem as soon as possible.

•  If a detected air leak is potentially dangerous, isolate the area and attend to it immediately.

Vibration

Vibration is a characteristic of all reciprocating machines. It can be held to a minimum by keeping the compressor securely 

fastened to a solid level foundation. Isolating vibration pads should only be used with Engineering approval.

•  Maintain proper belt alignment

•  Keep nuts and bolts tight

Overheating

The compression of air generates heat, much of which is dissipated as cooling air passes over the cylinders, heads and 

intercoolers. Improper rotation and dirt accumulation on compressors are the most common causes of overheating.

•  Make sure that the compressor is rotating as per the directional arrow indicated on the flywheel.

•  Keep your compressor cooling fins clean at all times. Cooling fins are found on intercooler tubes, cylinder heads, 

cylinders etc.

•  Make sure room ventilation is proper; the radiant heat created by the compressor will cause the room temperature to 

rise.

CONTROL ADJUSTMENTS

Electric Stop/Start Operation

Electric powered compressors are equipped with a pressure switch type control. Pressure switches are electrical devices and 

should be adjusted by a qualified electrician or compressor technician.

•  The pressure switches provided by Eagle are pre-set at the factory and usually do not require any adjustment.

•  Most pressure switches supplied by Eagle will have adjustment instructions printed under the switch cover.

Constant Speed Control Operation

All gas engine driven compressors are equipped with a constant speed control pilot valve which activates a compressor 

unloading  device.  Various  types  of  compressor  unloaders  are  used,  they  could  be  inlet  valve  unloaders  (located  on 

compressor heads), or air outlet vent unloaders (located on compressor delivery line before the check valve.)

The  control  pilot  valve  is  connected  directly  to  the  air  receiver  tank  and  on  its  output  signal  side  to  the  compressor 

unloading  device.  When  the  air  signal  from  the  pilot  valve  is  sent  to  the  unloading  device;  the  compressor  stops 

compressing.

•  To adjust the pilot valve simply loosen the barrel locknut and rotate the barrel. Clockwise rotation will increase the 

pressure while counter clockwise will decrease the pressure. Lock the barrel when proper pressure is achieved.

•  Gas engine driven compressors are also equipped with a air bleed off vent valve located on the check valve. To provide 

for easy starting when pressure is present in the receiver tank, Simply open this vent valve allowing the compressor 

discharge line to vent to atmosphere. When you are satisfied that the engine is operating at speed, close the vent valve 

and the compressor will operate normally.