Main Valve - Wittke STARLIGHT Maintenance Manual

Main Valve

Pressurized oil is directed from the hydraulic pump to a bank of stack-type directional control valves
mounted either on the front header of the W
mid-section body wall (see Figure 7-28). Rubber gaskets seal each valve section.
N : The left-side mounted main valve is protected by a protective cover.
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Figure 7-27 Main valve (front mounted)
Figure 7-28 Main valve (left-side mounted)
Main valve
The main valve powers all body functions (tailgate, arms, packer, etc.).
The valve bank on a commercial unit is comprised of the following:
 The Inlet Section: The oil enters the valve bank through the top of the inlet section where it is
then directed to the work sections below. The pressure test port is located at the front of the inlet
section. Remove the cap on the quick coupler (see Figure 7-29) and install a pressure gauge to
read the system operating pressure.
™ body (see Figure 7-27) or on the left-hand side,
ITTKE
Air control box
Hydraulic System 109
Protective cover