Rolair FC2002 Manuel D'instruction page 7

7. AIR INTAKE FILTER
compressor pump. Check intake elements on a regular basis and either clean or replace as needed. Warm
soapy water or low compressed air may be used to clean the elements. Check intake canisters or elbow
components for cracks or broken seals and replace if structural problems are found.
8. PILOT-UNLOADER VALVE A pilot-unloader valve is used on all gas-powered units and can be used on
electric air compressors to operate in a continuous manner. When the storage tank reaches the top
pressure setting of the pilot valve, the air being compressed is discharged to atmosphere instead of into the
storage tank. When the tank pressure drops to the low pressure setting of the pilot valve, the compressed
air will be redirected to the air tank. Do not attempt to replace the pilot valve without first draining the tank
pressure completely. See Figure 3 for adjustment and fine-tuning instructions. Do not adjust above the
following factory recommendations.
9. SIGHT GAUGE/DIPSTICK
compressor pump and engine (if compressor is gas powered). Every direct-drive hand-carry air compressor
has a dipstick to help check and maintain the proper oil level. The dipstick also functions as a crankcase
vent. Never operate a direct-drive unit without the factory supplied dipstick. Our belt-driven air
compressors are equipped with a sight gauge to make the daily task of checking the oil level easier. Always
maintain the oil level to read 2/3 full on the sight gauge.
10. CHECK VALVE Every ROLAIR
pressure after the top end pressure setting of pilot valve or pressure switch is reached. The check valve
works in conjunction with the pressure switch relief valve to provide a
system. A quick burst of air escaping from the pressure switch relief valve after an electric unit reaches top
end indicates the check valve is working properly. If the compressor has a mysterious leak after stopping
that cannot be traced elsewhere, the check valve may require servicing/replacing.
11. BREATHER/OIL FILL PLUG
relieve the pressure that is created by the downward movement of the piston in the pump cylinder. Our
direct-drive air compressors vent the crankcase pressure through special ports in the dipstick. Our belt-
drive units vent through the oil-fill plug. Never operate the air compressor without the dipstick or oil-fill
plug.
12. AUTOMATIC-IDLE CONTROL
control kit that automatically decreases the engine speed when the top end pressure setting of the pilot
unloader valve is reached. The top RPM setting of the engine is factory set for maximum performance and
service life. Do not alter the factory top RPM setting. The engine idle speed is factory set and controlled by a
black plastic Philips head screw on the carburetor. A slight increase to the idle speed setting may be
required when operating in colder temperatures. Turn screw clockwise in 1/4 turn increments to increase
the idle speed. If the idle speed setting is too low, premature fouling of spark plug will occur.
13. COLD-START VALVE
valve that allows the motor/pump to warm up before being subjected to tank pressure. Our belt-driven
portable units have a manual drain valve installed on the pump aftercooler to assist with cold weather
starting. Open drain valve and allow the motor and pump to run
the drain and repeat the procedure if the motor or engine continue to struggle.
SYSTEM CONTROLS (con't)
Air intake filters are installed to prevent foreign matter from entering the engine or
Classification
Direct Drive Compressor
I-Stage Compressor
II-Stage Compressor
Prior to daily operation, make a habit of checking the oil level of the
air compressor is built with a check valve to seal off and maintain tank
®
All reciprocating air compressor pumps are built with a crankcase vent to
Every ROLAIR
Most ROLAIR direct-drive air compressors are built with an automatic cold-start
®
Pressure Setting
105-130 PSI
110-135 PSI
130-150 PSI
gas-powered air compressor is built with an engine idle
®
unloaded
- 7 -
loadless
start for the compressor
for a minute to warm up. Close