Super Products MUD DOG, Operator'S Manual

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PRE-OPERATION
Super Products LLC Publication: 0004175 2
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5
2
Vacuum Pump Operation
1. The vacuum pump is driven through a transfer case.
For vacuum pump operation, the rear drive axle is
disengaged and the vacuum pump is engaged. The
transmission should be in neutral, parking brakes
engaged and wheel chocks properly positioned
before beginning the engagement process.

CAUTION
2. Start engine and allow it to idle. Let chassis air build
to the maximum 120psi.
3. The truck is equipped with a "throttle enable" switch
located on the chassis instrument panel. Move this
switch to the "on" position.
4. Transfer Case/Vacuum Pump Engagement
Methods of engagement vary with the chassis
transmission and transfer case equipment.
Select the section below that matches the
configuration of the unit being operated. The
standard configuration is manual transmission
with manual shift transfer case.
Manual Transmission with Manual Shift or Air
Shift Transfer Case.
a. Fully depress the clutch pedal.
b. Shift transmission into high range.
c. Put the gear shift in reverse.
d. Locate the lever between the driver's and
passenger seat labeled "Rear Axle". Pull up on
the lever until it is fully engaged. It may be
necessary to feather the clutch in order to get full
engagement. A green light will come on
indicating the rear axle is disengaged.
e. Locate the PTO control on dash for the hydraulic
pump. Move PTO control switch to the
engaged position. If the unit is equipped with an
optional air shift transfer case, locate the valve or
switch (respectively) labeled "Rear Axle" or
"Vacuum Pump" between the driver's and
passenger seats or on the instrument panel.
Move the valve or switch to the "engaged"
position.
f. Let out the clutch momentarily two (2) to three (3)
seconds.
g. Depress clutch again and select the proper
forward gear. The proper gear should be the
highest forward gear which will keep the engine
speed above 1000 RPM at the desired vacuum
pump speed.
h. Slowly release the clutch, the vacuum pump will
be turning at this time.

CAUTION
Failure to engage parking brakes and/or position
wheel chocks could result in unexpected chassis
movement which could cause bodily injury or
property damage.
Make sure no one is near the end of the vacuum
hose and that the vacuum relief door is open
before engaging the vacuum pump. Failure to do
so could cause personal injury.