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8474488
Twin Tank Wheelbarrow Portable Air Compressor
6. Pilot-Unloader Valve
A pilot-unloader valve is used on all gas-powered units.
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 Pilot Valve Adjustment for
adjustment and fine-tuning instructions. Do not adjust above
the following factory recommendations.
Classification
I-Stage Compressor
II-Stage Compressor
7. Sight Gauge
Prior to daily operation, make a habit of checking the oil
level of the compressor pump and engine. 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.
8. Check Valve
The air compressor is built with a check valve to seal off and
maintain tank 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 loadless start for the compressor 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.
Visit www.princessauto.com for more information
Pressure Setting
110 to 135 PSI
130 to 150 PSI
V 3.03
11
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