Thomas PROTOUGH 900 - 2.2 Hydraulic Controls; 2.3 Pneumatic Controls; 2.4 Axle Stop Controls

11
A
B
T90017
D
C
2. CONTROLS
2.2 HYDRAULIC CONTROLS
(fig. T90017)
A. Hydraulic lift for fifth-wheel hitch.
Pull lever towards you to raise the front of the
unit for fifth wheel engagement. Push away
from you to lower the front of the unit after
the tow vehicle is clear.
B. Hydraulic shaker head control. Push
to engage shaker head. Pull to stop shaker
head.
2.3 PNEUMATIC CONTROLS
C. Push the emergency brake valve to
release the parking brakes. The air tank must
still have pressure for the brakes to release
fully (T90017).
D. Turn the suspension dump valve to the
"Lower Position" or CCW (counter clock-
wise) 1/4 of a turn to release the air from the
suspension and lower the unit. This must be
done prior to engaging the Shakerhead.
(T90017).
If Toggle switch is used on unit; switch
suspension dump valve to the "Down
Position" or to the right, to release the air
from the suspension and lower the unit
(T90103). This must be done prior to engag-
ing the Shakerhead.
2.4 AXLE STOP CONTROLS
A. With the unit raised (air bags inflated),
remove the pin retaining the rear axle stop
handle. Move the axle stop handle to the ver-
tical or travel position (T90057). Install the
pin so the axle stop is locked (T90011).
Rear suspension
stop lock
T90011
The axle stop must be in the vertical posi-
tion before moving the unit.
IMPORTANT
T90057
Axle stop
travel position
T90103