SHD-138 Manual
8
Installation
Pump Assembly:
The pump assembly may either be installed
directly on the PTO or as an optional method,
may be driven by a driveline from the PTO.
Pump manufacturers provide specific installation
information for their products and should be
consulted if questions arise.
PTO Assembly:
Check with the PTO manufactures
representative for specific instructions regarding
your particular make, model, and year of
vehicle. As some trucks may require
modification of the transmission cross member
and the exhaust system, the manufacturer’s
instructions should be followed to insure proper
installation of the PTO.
Compressor Assembly:
Prepare the mounting location of the
compressor by locating and drilling four (4)
holes, 9/16” diameter as per the mounting
pattern of the air compressor base. Using four
(4) 1/2” x 1.50 GR-5 cap screws,1/2” flat
washer, and 1/2” nyloc nut, secure the
compressor in place. The compressor is air
cooled, and must have a clean supply of cooling
air to the fan with minimum restrictions.
Adequate space must be provided for proper
circulation of air.
Electrical Connections:
From the solenoid valve (located on the
hydraulic manifold) there are two (2) wires, red
and black, running to the compressor pressure
switch. Connect the black wire to the vehicle
frame or other suitable ground. The red wire
mounts to the pressure switch as shown. Install
a toggle switch in a convenient location.
Connect one terminal to the compressor
pressure switch and the other terminal to a 12-
volt power supply. Add a 20 amp fuse between
the battery and switch. A third wire is required
from the air compressor pressure switch when
connecting the speed control into the system.
(See drawing below)
Electric speed control:
An optional electric or electronic speed control
must be used to maintain proper operating
speed of the air compressor. The engine speed
control will automatically increase from idle to a
preset speed when engaged and decrease
when disengaged. The electric speed control
(American Eagle P/N C0873) is used on most
gasoline engines. The electronic speed controls
are used only on Ford 6.0 and 7.3L diesel
engines. Proper installation instructions are
provided with each system.
COMPONENT INSTALLATION
This section pertains to the installation of the air compressor, PTO, pump and other related items.
The instructions are intended as a guide to assist you with particular installation. These instructions
will provide only general information.