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

lTA-6.13A
Figure 5-22. Using a Shaft Sleeve to Install the Radial Shaft Seal into the Front End Plate (D2A Pump Model Shown)
Step F-6 k (Cont'd.)
REQUIRED ACTION: Install the radial shaft seal (45) into the front end plate (44) as follows:
(1) Insert the seal using one of the following methods.
Method (a) - Insert a shaft sleeve over the shaft (see Figure 5-22); slide the seal (45)
over the shaft sleeve and insert the seal into its slot in the front end plate; remove the
shaft sleeve from the shaft.
or
Method (b) - Place cellophane tape over the shaft to prevent the seal from being cut or
nicked; carefully slide the seal (45) over the shaft and insert the seal into its slot in the
front end plate; remove the tape from the shaft.
(2) Recess the seal (45) using one of the following methods.
Method (a) - Slide a seal driver over the shaft; using a hammer, strike the seal driver to
indent the seal into its slot in the front end plate; remove the seal driver from the shaft
(see Figure 5-22).
or
Method (b) - Slide the used seal over the shaft until it is against the new seal; using.a
hammer, tap evenly around the used seal to indent the new seal into its slot in the front
end plate; remove and discard the used seal.
F-7 NOTE: The end of the air inlet tube with the beveled tip and circumferential slots is the outside end (see Figure
5-4).
Install the air inlet tube (69) into the module as follows (see Figure 5-4):
a. Push the air inlet tube through the hole in the top of the front end plate (44). When installed
.. properly, two of the three circumferential slots in the end of the air inlet tube should extend out
of the outside surface of the front end plate (44).
b. Insert the retainer disk (71) into the second slot from the beveled tip of the air inlet tube (69).
NOTE: The other end of the air inlet tube (69) fits into the hole in the base of the intake portion of the high
vacuum pump cylinder (55) (see Figure 5-4).
F-8 CAUTION: USE CARE WHEN HANDLING THE MODULE TO AVOID BENDING THE LEVER (41) OR
CENTRIFUGAL SWITCH (39). (This CAUTION also applies to Steps F-9 through F-12.)
Repeat Steps C-9, C-6, C-5, C-4, and C-3, except assemble rather than disassemble.
40 TRIVAC "A" Manual, Edition L