PRE-OPERATION
Publication: 0028607
2-3
2
Vacuum System
The vacuum system utilizes a positive displacement type
of vacuum pump that is mechanically driven from the
truck’s engine. The vacuum system has the capability of
transferring materials using two methods — Pure
Vacuum and Air Conveyance.
CAUTION
Pure Vacuum
As a general rule, pure vacuum would be used for
removing sludge from beneath a liquid or for rapid liquid
loading. In this mode, the suction tube is totally
submersed in the liquid, and only material (no air) travels
through the tube. For materials with a greater density
than water, the distance must be reduced. Consult the
factory for additional information. The vacuum pump
should be operated at the minimum speed required to
perform the work. Operating the vacuum pump too fast
will decrease performance. Loading rates up to 1,000
gallons per minute (GPM) through a six-inch tube can be
accomplished.
Air Conveyance
The air conveyance method requires enough air velocity
going past the material for it to be picked up and
transferred. The material travels through the vacuum tube
and is deposited into the debris body. This requires the
vacuum pump to be operating at a fast enough speed to
produce the required airflow to pick up and transfer the
material.
NOTE
The most efficient and highest loading rate occurs
when the pump is run as slow as permissible and still
picks up the material.
IMPORTANT
There are applications in which a vacuum fluidizing
tube should be used. See Figure 2-3. A fluidizing
tube is a tube with air holes. This combines the
benefits of pure vacuum and air conveyance. The
fluidizing tube has the ability to remove sludge from
beneath liquids where the distance exceeds the
limitation of pure vacuum. These holes must be one
foot to four feet above the surface of the water.
NOTE
For maximum efficiency, all vacuum line connection
points must be airtight. This is accomplished by
installing the O-ring gasket over the male end of the
tube. Refer to “Operation Instructions” and
“Maintenance Schedule” for more information.
Figure 2-3
The vacuum system is designed for liquids,
slurries, and damp materials. Dry or dusty
materials must be wet down before vacuuming to
limit the carryover of debris into the separator
and final filter. This can be accomplished with the
handgun attachment or by injecting water into the
vacuum line with the liquid ring accessory.
Air Conveyance
Fluidizing
Holes
1 to 4 ft
20 to 100 ft
Water
Debris
Summary of Contents for Camel 1200 (Dump Body)
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Page 62: ...1 52 Publication 0028607 SAFETY 1...
Page 64: ...2 2 Publication 0028607 PRE OPERATION 2 Figure 2 1 Figure 2 2 1 3 2 5 6 4 7...
Page 106: ...4 18 Publication 0028607 SEWER CLEANING TYPICAL SEQUENCE 4...
Page 118: ...5 12 Publication 0028607 WATER RECYCLING SYSTEM 5...
Page 132: ...6 14 Publication 0028607 LUBRICATION AND MAINTENANCE 6...
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