18
IMPERIAL TRUCK MOUNTED VACUUM TANKER MANUAL
To operate the pressure water pump for the small
size wash-down system, make sure there is water in
the water tank, and then turn the pump switch on.
This pump does not require priming.
To operate pressure water pump on the large size
wash-down system, use the following procedure:
1. Open the ball valve attached to the pipe nipple
that comes out of your truck’s water tank.
2. Check to make sure the pump is primed by
opening the camlock-fitting cap attached to the
pump housing.
•
If water flows out from the camlock fitting, the
pump is primed and the cap can be replaced.
•
If no water flows out of the camlock fitting, add
water until the pump housing is full. Replace the
cap after filling the pump.
. Press the on/off switch positioned at the top of the
pump housing.
4. When the water tank is empty, promptly shut the
pump off. As water flows through the pump it
lubricates the pump seal. Running the pump dry
(without water flowing through it) will damage
the seal.
During cold weather (below 2
o
),
drain the liquid
from your pressure water pump to prevent freezing
and damage to the pump housing. This applies to
both types of systems. In addition, drain all water
lines and filters to protect them from freeze-up.
►
NOTICE: Do Not start the DC-10 water pump,
included with the large size system, until you are
sure it is primed with water. Starting or running
the pump dry will cause scoring of the mechanical
seal, resulting in damage to the pump.
►
NOTICE: Do Not allow water to freeze inside
the pump. Do not attempt to start the pump if
water has frozen inside it. Freezing water can
damage your pump. Take the truck into a warm
area and allow the pump the thaw out.
Cold Weather Operation
Use the following guidelines when operating your
vacuum tank in temperatures below 2°F.
Extremely cold weather can result in formation of ice
inside the vacuum pump, due to residual moisture. If
the pump freezes up due to ice, take the truck into a
warm area and allow the pump to thaw. Do Not use a
blowtorch or other similar device to attempt to thaw
a frozen vacuum pump.
Before starting your truck engine, make sure that
your pump is not frozen up inside with ice. This is
important because extremely cold weather can
cause power shift PTO-s to momentarily transmit
high torque, which can cause PTO output rotation in
the disengaged position. This type of PTO rotation
could have sufficient force to damage a pump that
is frozen.
In addition, Do Not engage the PTO driven equipment
until the vehicle has warmed up. If the PTO begins to
rotate in the disengaged position, the PTO gears may
not mesh when attempting to engage the PTO.
Extremely cold weather could also cause the dump
or load valves to freeze shut. Hot water poured over
a frozen valve should loosen the ice. DO NOT use a
blowtorch or similar device to thaw a frozen valve.
This method could damage the valve.
OPERA
TION
