HydraMaster Corporation
10/24/02
Vacuum System
MAXX 450D/470D/450 Diesel
Section 8-1
T
he vacuum blower in this machine is a positive displacement lobe type.
The performance and life of this unit is greatly dependent on the care and proper
maintenance it receives.
Because of the close tolerances between the lobes and housing of the vacuum blower,
solid objects entering the inlet will damage the internal lobes, gears,bearings or drive
system.
To prevent this, a stainless steel filter screen has been placed at the vacuum inlet
inside the vacuum recovery tank. This stainless steel screen is finger tight and should
be removed for cleaning weekly.
When machine is being run for test purposes and the vacuum inlet on top of the
machine is open, caution should be used.
To protect the vacuum blower from overloading and damaging itself, there is a vacuum
relief system installed on the vac tank. When the vacuum tank inlet is completely
sealed off, a maximum of 14 HG will be attained. At the end of each day, an oil based
lubricant should be sprayed into the blower lubrication port before shutting down the
machine. If you fail to lubricate the vacuum blower daily, rust deposits and moisture
will decrease the life of the vacuum blower.
Foam passing through the blower could lead to serious problems. Therefore, it is
important to keep the vacuum tank foam free.
Read the vacuum blower manual carefully for proper oil change and grease applica-
tion. The maintenance log may differ slightly from the manual, but the truck-mounted
carpet cleaning machine application is very demanding of the vacuum blower and
therefore it should be maintained more regularly.
CAUTION
!
CAUTION
!
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