Controls - Midland SIDE DUMP GRAVEL TRAILER Operator's Manual

4.4

CONTROLS

Before starting to work, all operators
should familiarize themselves with the
location and function of all controls.
1. Hydraulic System:
Each customer must provide controls
in the tractor cab for operating the
trailer.
a. Requirements:
The trailer requires a 30 gpm oil
supply at 2500 psi to operate
the tub cylinders. Normally the
oil supply is provided by PTO
powered pump on the tractor.
The oil is routed through a
manual or electric valve to direct the oil to
the required side of the cylinders. Review the
tractor manual for details on PTO operation
before starting.
b. Couplers:
Connect the oil supply lines from the tractor
to the couplers on the front of the trailer when
hooking up the unit. Always check to be sure
the couplers are tight and not leaking. Do not
operate if couplers are leaking.
c. Manual System:
In the manual system, a two way valve
is mounted on the tractor or trailer
frame to direct the flow of oil to the
cylinder. Refer to schematic here and
in Section 7 for a typical installation
circuit.
d. Electrical System:
With a electrically controlled system, a
control box is provided that mounts in
the cab. This control box is equipped
with a 2 push button switch to control
the raising and lowering of the hoist. It
is recommended that a toggle switch be
installed in the power line to the control
box to turn system off when not in use.
Refer to the schematic here and in
Section 7 for a typical hydraulic system.
Refer to Section 7 for the electric
control circuit wiring and plugs.
e. Electric Hydraulic Valve:
The electric hydraulic control valve that
directs the flow of oil is mounted in the
trailer frame.
14
Fig. 2 HYDRAULIC COUPLER
Hydraulic valve with air-shift control TW2500/2000/3000
Fig. 3 HYDRAULIC SYSTEM