Grobet dry pressure\vacuum units are 100% oil-free. The pump employs a
non-lube piston and cylinder. No maintenance is necessary for the
bearings. All bearings are sealed and permanently lubricated. Lubrication
should not be attempted. The units are built for continuous duty operation
with the quietness and durability of a diaphragm, but with piston
performance.
VACUUM PROBLEMS
Leakage, contamination and unusual outgassing are the general causes of
problems with poor vacuum. To operate at maximum efficiency a system
must be thoroughly clean. If the system is completely clean and free from
leaks, and unwarranted vacuum problems still exist, the pump should be
checked. A simple criterion for the condition of the pump is the
determination of its maximum vacuum capability. This can be
accomplished by blocking of the intake and reading the vacuum level on
the gauge.
TROUBLESHOOTING GUIDE
Poor Pumping
Poor
Loud
Speed
Vacuum
Unit
Possible Cause
Corrective Action
X
X
X
Damaged Valves
Replace flapper valves
X
X
X
Debris in Valves
Remove debris and
check for valve damage
X
X
X
Damaged Gaskets
Replace gaskets
X
X
X
Loose Head Screws
Tighten head Screws
X
X
Loose Fittings
Tighten fittings
TROUBLESHOOTING
MAINTENANCE
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