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

Step F-l (b) (2) (Cont'd.) (m) CAUTION: FAILURE TO EVENLY DRIVE THE ROTATIONAL LOCK
BEARING DOWN THE SHAFT COULD RESULT IN GALLING OF THE
BEARING ID.
REQUIRED ACTION: Apply Loctite 609 to the area of the shaft where the
bearing will fit and to the 10 of the new rotational lock bearing. USing a hammer and
a pipe that has an 10 greater than the shaft 00, gently tap the rotational lock bearing
down over the shaft until it bottom$, out. Wipe off any excess Loctite.
(n)
CAUTION: It takes about 5 minutes for loctite 609 to begin setting. For
D30A pump models, Steps (0) and (p) should be completed before the Loctite
has time to set, in case the end plate must be removed.
Apply Loctite 609 to the 00 of the new rotational lock bearing and to the 10
of the mating bearing well in the end plate.
(0) Repeat Steps (f), (c), and (b), except assemble rather than disassemble.
(p)
(q)
(r)
(s)
For D30A pump models only, spin the fan to check if the motor rotates
freely. If there is a lot of friction, immediately remove the fan and the fan
end-plate before the Loctite has time to set; then remove and discard one of
the spacer rings and reassemble the motor.
Using the four screws, attach the fan cover to the motor.
Spin the shaft to check if the fan contacts the fan cover or fan end-plate.
If it does, remove the fan cover and adjust the position of the fan on the
shaft; then reassemble.
NOTE: Allow the motor to sit for at least 1 Y:, hours prior to testing. This
will allow the locktite time to cure and firmly bind the surfaces.
REQUIRED ACTIONS: Use the instructions at the beginning of Step b(2) to
determine if the rotational lock bearing is installed correctly and to correct
the problem if the lock bearing is installed backwards or is malfunctioning.
If the lock bearing is installed correctly, repeat Steps b(l) (a) through b(l)
(d) to check the wiring of the motor.
F-2 NOTE: When reassembling the valve plate (50) to the second stage pump cylinder (46), ensure that the bent
tabs that cover the exhaust holes are facing down. If the tabs are not bent, it does not matter which side is faCing
down.
Repeat Steps 0-15 through 0-11, 0-9, and D-7 through 0-2, except assemble rather than disassemble.
F-3 CAUTION: NICKS OR TEARS IN THE RADIAL SHAFT SEAL COULD RESULT IN A LUBRICATING
FLUID LEAK AND POOR PUMP PERFORMANCE.
CAUTION: FAILURE TO RECESS THE RADIAL SHAFT SEAL (45) IN ITS SLOT IN THE REAR END
PLATE (60) WILL RESULT IN THE VANES (53) RUBBING AGAINST THE SEAL (45) DURING PUMP
OPERATION.
NOTE: The side of the seal that has a small circular spring around the 10 faces the bronze bushing in the rear
end plate (60).
REQUIRED ACTION: Use one of the following methods to install a new radial shaft seal (45) in the rear end
plate (60) (see Figure 5-12).
Method (1) - Insert the new seal into its slot in the rear end plate. Using a hammer and a seal driver (see Figure
5-22), recess the seal in the slot.
or
Method (2) - Insert the new seal into its slot in the rear end plate. Place the used seal over the new seal. Use a
hammer to tap the used seal until it indents the new seal in its slot in the rear end plate. Remove and discard the
used seal.
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TRIVAC "A II Manual, Edition L