22
IMPERIAL TRUCK MOUNTED VACUUM TANKER MANUAL
MAINTENANCE
★
IMPORTANT: Check the primary shutoff
regularly for the condition of the ball seat and
fastener tightness. Improper maintenance of
the primary shutoff may allow liquid to flow into
the vacuum pump, which will result in damage
to the unit.
PTO
After installation, the PTO becomes an integral part
of the transmission on the vehicle’s motor, and is
lubricated by the transmission oil. Maintain the
transmission oil per the vehicle manufacturer’s
recommendation for severe service.
PTO Driveline
Grease the PTO driveline weekly during the spring,
summer, and fall. Grease the PTO driveline daily when
operating during winter conditions (such as when
there is salt on the roads).
There is a grease fitting on each of the universal
joints and a grease fitting for the telescoping shaft
(see Figure 4.1).
Right Angle Gear Box
Check the gear lube level in the right angle gearbox
weekly. Add gear lube if the level drops below the
bottom of the gearbox shaft. Use EP 80/90 gear lube
in the gearbox. Fill the gearbox to 1/2 full maximum
(half way up the shaft).
The gearbox is located under the truck and is
mounted to the inside of the vacuum pump on the
vacuum pump mounting stand (see figure .1 page
9 and figure 4.1, page 20). Depending on the style of
truck frame and the size of vacuum tank, there may
be very little clearance to access the fill plug on top of
the gearbox. To check the oil level, use an improvised
dipstick (a drinking straw works well) inserted into
the fill plug opening. Before removing the dipstick,
place your finger on it to mark the top surface of the
gearbox housing.
Optimally, the oil level should be 1/ the way up the
shaft, which is centered vertically in the gearbox
housing. Overfilling the gearbox with oil can create
the potential to damage the seals due to an excess
buildup of pressure.
►
NOTICE: Do Not overfill the right angle
gearbox with oil. Overfilling the gearbox can
cause seal damage, resulting in gearbox failure.
Figure 4.3 Primary shutoff for external air-line tanks.
Rubber Ball Seat
Remove float
cage to access
rubber ball seat
for cleaning or
replacement.
Loosen band
clamp to replace
rubber ball seat.
Primary shutoff
access lid
Portal gasket
Float ball
Rubber
Ball Seat
Float cage fastens
to inside of portal
base.
Loosen band
clamp to remove
rubber ball seat.
Primary shutoff
access lid
Portal gasket
Figure 4.4 Primary shutoff for through the tank air-line systems.
Float ball
When replacing ball
seat, remove the elbow
by disassembling the
two bolt flange.
