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

Figure 5-5.
Removing the Cylindrical Pins From the
Module (D2A Pump Model Shown)
Figure 5-6.
Rear End of Module Minus the Disk
(D2A Pump Model Shown)
C·12 Remove the high vacuum stage pump cylinder (55) to expose the high vacuum rotor (54) and the center bearing
(52). Remove the O-rings (47) from both sides of this pump cylinder (see Figure 5.7).
C-13 Remove the front end plate (44) from the motor side of the shaft (see Figure 5-8).
C-14 Pull the air inlet tube (69) from the front end plate (44) or high vacuum stage pump cylinder (55).
5-3 and 5-8.)
C-15 Remove the second stage pump cylinder (46) to expose the second stage rotor (48).
from both sides of this cylinder (see Figure 5-8).
C-16 Repeat Step C-", except remove the vanes (49) from the second stage rotor (48). (See Figure 5-8).
C-17 CAUTION: BE CAREFUL TO AVOID SCRATCHING THE END OF THE ROTOR OR THE CENTER BEA
ING. SCRATCHES TO THESE SURFACES RESULT IN POOR PUMP PERFORMANCE.
REQUIRED ACTION: Using a puller or a prying device, remove the high vacuum stage rotor (54) from the
NOTE: Two threaded metric pulling holes are located in the outside end of the high vacuum rotor (54) for
with a puller (see Figure 5-7).
NOTE; The second stage rotor (48) and the shaft are permanently attached to each other on the D2A. D4A.
and D16A pump models.
C-18 Using small diagonal cutting pliers, pull the high-vacuum-stage rotor key (57) from the slot in the shaft
Figure 5-9).
C-19 Slide the center bearing (52) off of the shaft (see Figure 5-9).
20 TRIVAC "A" Manual, Ed'iti(jtn