2
IMPERIAL TRUCK MOUNTED VACUUM TANKER MANUAL
Captured Mounting Bracket Springs
Check the tension on the spring mounts monthly.
Examine the spring mounts to make sure they have
not loosened up due to vibration. Adjust the springs
on the captured mounting brackets to a compressed
length of ½” (Figure 4.5).
Standoff Wear-plate
A standoff assembly, for increasing air-fl ow while gravity
dumping, is an available option for Imperial Vacuum
Tankers. If your vacuum tanker is equipped with a
standoff assembly, the attached wear-plate requires
periodic inspection and replacement. The abrasion
resistant wear-plate protects the interior of your tank
barrel from eroding due to abrasive substances in the
material being pumped (Figure 4.6).
Maintenance intervals for wear-plate inspection
and replacement vary depending on what material
is pumped. For example, car wash sludge contains
much sand, which is highly abrasive. This type of
material will cause the wear-plate to wear out much
more quickly than pumping septage or sewage.
Inspect the wear-plate at an interval based upon
comparing your usage to these examples:
•
When pumping car wash sludge, check the wear-
plate at least once a week.
•
When pumping septage or sewage, check the
wear-plate at least every three months.
It is important to maintain a regular schedule of
inspecting the wear-plate so that it can be replaced
promptly when worn through - before damage to
the tank occurs. Continued operation after the wear-
plate is worn through will result in erosion of the
tank wall; this is especially signifi cant for aluminum
tanks.
►
NOTICE: Replace the standoff wear-plate
promptly after it becomes worn through.
Prolonging operation of your vacuum tanker
after the wear-plate is worn out will damage the
tank.
To inspect the wear-plate, stand outside the tank
and look up through the rear hatch with the aid of
a fl ashlight. When the wear-plate wears through, a
large hole will develop. This will be readily apparent
with a visual inspection. Replace the wear-plate at
this point in time.
Replacing the wear-plate requires that you enter the
tank, and this requires that you use all appropriate
precautions. The precautions listed below must be
rigidly followed because of the inherent hazards of
entering a tank that is used for holding septage or
sewage. These effl uents, and the residue from them,
give off deadly gasses that can paralyze the olfactory
system (a persons sense of smell), and thus strike
without warning.
DANGER:
DO NOT enter a transport, septic, or
holding tank without fi rst cleaning and providing
adequate ventilation to the interior of the tank.
Sewer gas is deadly if inhaled; in addition, it depletes
the oxygen in a confi ned space, which can cause
asphyxiation.
DANGER:
DO NOT enter a transport, septic, or
holding tank without using a respirator that supplies
grade D breathing air or a self-contained breathing
apparatus. In addition, DO NOT use this equipment
without training and familiarity with it. Entering a
tank exposed to sewage effl uent without a correct
breathing apparatus, or with improper use of it, can
cause death.
DANGER:
DO NOT enter a transport, septic, or
holding tank without protective clothing. Sewer gas
can be absorbed through the skin causing serious
injury or death.
Figure 4.5 Mounting Bracket Assembly
Spring compression
adjusted to 3
1
/
2
"
Rubber Sill
Tank Skid
Truck frame
MAINTENANCE
�����������������������������������������������������������
����������������������������������������������������
������������������������������������������������������
������������������������������������������������������
DANGER
������������������������
����������������������
����������������������
