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

.,
l1
§
()
:a;
~
§
~-
~
g:
:::s
,...
Symptoms
11. The pump will not
start. (cont'd.).
Trouble Area
c. Module is not
vented.
TABLE 6-1. TROUBLESHOOTING CHART ,"' .......... .
Probable Cause
Valve disk (67) and piston
(68) are stuck in place in
high vacuum pump
cylinder (55).
For D30A, D60A, and
D90A pump models only,
small hole in high vacuum
pump cylinder (55) just
below piston(68) isclogg
+ Clean disk and piston or install new ones.
+ Clean intake tube portion of high vacuum
pump cylinder (55).
+ Clean this small hole.
Repair ~.---.
B-1 thru B-7, C-1
& 0-5
B-1 thru B-7, C-1,
E-3d; if needed
C-2 thru Co?,
C-14, F-?, F-9,
F-11, & F-12
Centrifugal switch (39)/Iever
(41 )/spring (42) assembly
is excessively dirty.
+ Clean assembly (39/41142).
B-1 thru C-6, F-9,
F-11, & F-12
Air inlet tube (69) is
clogged.
+ Clean air inlet tube (69).
B-1 thru Co?,
C-14, F-?, F-9,
F-11,&F-12
Centrifugal switch (39) is
malfunctioning.
Install new centrifugal switch (39).
B-1 thru C-5, F-9,
F-11, & F-12
Lever (41) is bent.
Straighten or install new lever (41).
B-1 thru C-6, F-9,
F-11, & F-12
Spring (42) is not sitting
properly in its hole in the
front end plate (44).
Reinstall the spring (42) in its hole.
B-1 thru C-6, F-9,
F-11, & F-12
d. Friction occurs
between the rotors
(48/54) or vanes
(49/53), and the
module housing
(44/46/52/55/60) .
Module is not aligned
properly.
Align module.
B-1 thru B-10,
F-10, & F-12
e. Pump fluid is too
thick.
Room is too cold. (The
minimum ambient temperature
for easy startup is
50°F.)
Start pump at atmospheric pressure before
connecting it to your vacuum system.
Heat oil casing (12)
Drain pump fluid, heat it, and refill pump with
warm fluid.
(11
....
·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.