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
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