27
IMPERIAL TRUCK MOUNTED VACUUM TANKER MANUAL
fl uid at least every three months.
In addition, clean the inside of your pump any
time that water shows up in the oil catch muffl er
or if excess moisture begins to accumulate in the
moisture trap. Pay attention to periodic cleaning
because it will increase the life of your pump.
DANGER: Stop the truck motor, remove all
persons from the truck cab, and chock the truck
tires before servicing the vacuum pump. Contact
with a rotating mechanism can cause entanglement
that can lead to death. A truck that begins to roll is
a crushing hazard that can lead to death.
Use the following procedure to clean your vacuum pump:
1. Disengage the PTO and make sure your pump is
in the non-operating mode.
2. Remove the pump intake or exhaust inlet hose, or
the inlet access plug (Figure 4.11). Use the most
accessible inlet to clean your pump.
. Create a fl ushing fl uid with a 50/50 mixture of
diesel fuel and vacuum pump oil. Pour 1/2 pint
of this mixture directly into the pump inlet.
• When adding fl ushing fl uid to the intake inlet,
place the control handle in the vacuum mode.
• When adding fl ushing fl uid to the exhaust inlet,
place the control handle in the pressure mode.
4. Next, turn the control handle to the neutral
position to close the changeover valve.
5. Replace the inlet plug or inlet hose.
6. Engage the PTO and run the pump at operating
speed for about one minute.
7. Next, disengage the PTO, and then use the control
handle to switch the pump to vacuum mode.
★
IMPORTANT: Be sure to replace the inlet
plug or inlet hose before placing the pump in
the vacuum mode to expel the fl ushing fl uid.
CAUTION: Do Not position the control handle
to the pressure mode, which would expel the fuel
through the pump inlet. Incorrectly expelling
the fl ushing fl uid through an open inlet (without
the inlet plug or inlet hose replaced) could cause
it to spew out at the operator.
8. Re-engage the PTO, and run the pump at
operating speed for about ten seconds.
9. After completing the above cleaning sequence,
use the correct safety procedures and then rotate
the driveline slowly by hand. Listen for a clicking
sound as each rotor vane drops in its slot. If not all
of the vanes are sliding freely in the pump rotor
slots, repeat the above procedure until they do
pump.
•
Grease the pump bearings every 4 hours of
operation or daily.
It is important not to over grease the pump bearings.
Use only one or two pumps on the grease gun when
greasing.
►
NOTICE: Check the oil level in the rear housing
at regular intervals. Allowing the pump to run low
on oil during operation will result in damage to
the pump.
►
NOTICE: Follow the manufac turers
recommended lubricants for your specific
vacuum pump. Because of differing oil pump
types and heat generation characteristics among
vacuum pumps, using the incorrect oil can lead
to overheating and mechanical failure.
★
IMPORTANT: Do Not over grease the pump
bearings. Over greasing can cause damage to
the seals.
Periodic Vacuum Pump Maintenance
Other maintenance for your vacuum pump includes
cleaning the exterior of the pump, cleaning of
the pump interior, checking rotor vane wear, and
replacing worn rotor vanes.
Cleaning the Exterior of the Vacuum Pump
Clean the mud and dirt off the exterior of your
vacuum pump on a regular basis. This is especially
important for air-cooled pumps that need to be clean
to allow heat to radiate from them.
Cleaning the Inside of the Vacuum Pump
Occasionally a small amount of liquid, dirt, or other
contaminate may enter the pump, restricting the
ability of the vanes to glide in the rotor slots. To
prevent vane-restricting buildup in your vacuum
pump, clean the inside of your pump with a fl ushing
MAINTENANCE
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