Leybold Vacuum Products, TRIVAC A, Dual Stage, Rotary Vane ...

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Symptoms
Trouble Area
TABLE 6-1. TROUBLESHOOTING CHART (Continued)
Recommended
Probable Cause
Corrective Action
Repair Steps*
3. The pump will not
achieve its ultimate
pressure (cont'd.).
h. Anti·suck back Centrifugal switch (39) is Install new centrifugal switch (39). B-1 thru C-5, F-9,
assembly (cont'd.) malfunctioning. F-ll & F-12
Centrifugal switch (39)/lever +Clean assembly (39)/41/42). B-1 th ru C-6, F-9,
(41 )/spring (42) assembly F-l1, & F-12
is excessively dirty.
Lever seal (43) is worn. Reverse seal (43) or install new seal. B-1 thru B-7, & 0-7
Level (41) is bent. Straighten lever (41) or install new lever. B-l thru C-6, F-9,
F-ll, & F-12
The spring (42) is not Reinstall the spring (42) in its hole. B-l thru C-6, F-9,
sitting properly in its hole F-ll, & F-12
in the front end plate (44).
The a·ring (70) on HV·pump· Install new a·ring (70). B-l thru C-7, C-14,
cylinder end of the air inlet
0-2, E-9, F-7, F-9,
tube (69) is worn. F-l1, & F-12
i. Radial shaft seal Worn seal (45) is allowing Install new seal (45). Inspect the shaft where it See worn seal in
(45) is worn. venting of module. rides in the seal for wear. Install new shaft, if Symptom 8b. If
necessary.
replacing shaft, do
B-l thru F-17.
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j .. Vane (49/53) is Dirt has accumulated in +Clean rotor slots and change lubricating fluid. B-l th ru F-17
stuck in rotor rotor slot.
(48/54) slot.
Vanes are installed with Clean vane slots and install vape with chamfered B-l thru F-17
chamfered edge out.
edge facing center of rotor.
k. Vanes (49/53) One or more of these parts Replace worn part with new part. B·l thru F-17
rotors (48/54), contain gouging or wear.
pump cylinders
(46/55), shaft,
inside surface of
plates (52/60/441.
or bronze bushing
in plates (60/44/52)
*This column contains the disassembly steps required to perform the corrective action. Some critical assembly steps are also listed.
If the section is not specified, the steps are located in Section 5.
+Use the general cleaning instructions at the beginning of Section 5-E.