10
Section 5: TROUBLESHOOTING
5.10
Vacuum Problems
Leakage, contamination and unusual outgassing are the general causes of problems with poor vacuum.
To operate at maximum effi
ciency 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
(See Section 2.8).
5.11
Troubleshooting Guide
Poor
Pumping
Speed
Poor
Vacuum
Loud
Unit
Possible Cause
Corrective Action
X
X
X
Damaged valves
Replace fl apper valves
X
X
X
Debris in valves
Remove debris and check for valve damage
X
X
X
Damaged gasket
Replace gasket
X
X
X
Loose head screw
Tighten head screw
X
X
X
Loose fi tting
Tighten fi tting
X
X
X
Restricted Muffl
er
Clean/Replace Muffl
er
Summary of Contents for Welch 2580B-01
Page 12: ...12 6 11 Pumping Speed Curves...
