Vanair RC40 User manual

RC40 Vanair
Air Compressor

Air system overview
Maintainer Corp. of Iowa installs air systems per the customer’s requirements. They
range from small gas powered air compressors to large hydraulic driven rotary screw air
compressors.
Maintainer Corp. of Iowa designs and installs most hydraulic systems that run the air
compressors. The systems are designed using the air compressor manufacturer’s
specifications for each unit. Horsepower requirements, R.P.M. and duty cycle are the
determining factors when designing the systems.
The air system components are matched to the air compressor output. The air hose size,
air storage capacity, Filter Lubricator Regulator and hose reel are matched to the air
compressor output.
The hydraulic system used on the air compressor may be an open or closed center
hydraulic system. A solenoid valve and oil flow control valve control the hydraulic flow
to the hydraulic motor. An electric pressure switch controls the solenoid valve. The
pressure switch will energize the solenoid valve when the air system lowers to a set
pressure. This pressure is approximately 120 P.S.I. The pressure switch will de-energize
the solenoid valve when the air system reaches a higher set pressure. This pressure is
approximately 150 P.S.I.
The air reservoir tank is equipped with a 165 P.S.I. pop off valve to prevent the tank from
over pressurizing. There is a drain in the tank. The tank should be drained at the end of
each shift. The air is directed out of the air tank to air system components.

Created by Kbeltman
12/19/11
J:\Sales\_Customer Service\Service Body Manual\Compressors
How to set the Van Air RC 40 Compressor
Start by making sure the main hydraulic system pressures are at correct settings.
Have the truck running, the hydraulic system engaged, and the system at normal
operating temperature.
The compressor’s rpm’s are factory set at 840 to 865 RPM (Do not exceed 865
RPM). Begin by letting the air compressor run for fifteen minutes to warm up while
venting to the atmosphere. Now stop venting the air and let pressure build up to check at
what PSI the compressor shuts off. You will get the PSI reading from the FLR (Filter-
Lubricator-Regulator) gauge that is in-line with the air reel. To adjust the pressure
settings, access the pressure switch through the removable service panel. Remove the
cover from the pressure switch and adjust by turning the screw between the four
terminals. Turning in will increase pressure and turning out will decrease pressure. The
small adjuster will affect the differential level only. Set the shut-off pressure at 150psi.
The start-up pressure will normally be set 30psi lower.
Note: The Max air pressure of the system is 165psi.
Set Max RPM with 0-60psi with air venting to atmosphere.
Hydraulic motor requirements: 14 GPM @ 1700 PSI
Maintenance tips:
Change the oil once a year or 500 hours.
Change the oil more often under harsher conditions.
Van Air recommends Synthetic 10W-30 or 5W-30 or Van Air Kit 1091