Groth 1660A - Manual (Page 10)

Page 10 of 16
recheck the film seat gap. Remove this sub-
assembly and store on a clean surface.
O-RING SEAT PALLET
Remove the retaining ring [28], the retainer
plate [30] and two O-Rings [29 & 31]. Inspect
and clean the O-Ring groove and the bore in
the pallet. Install new O-Rings, and replace
the retainer plate [30] and retaining ring [28].
Do not expand the retaining ring
excessively.
Figure 5: O-Ring Pallet Assembly
BODY SEAT INSERT
The seating surface is a thin stainless steel
insert [27] bonded into the body. The flat top
surface contacts the O-Ring in the standard
pallet assembly. The corner radius contacts
the tensioned film of the optional pallet
assembly.
Inspect the appropriate surface to be sure it is
clean, smooth and flat. Press and twist the
insert manually to verify that it firmly bonded
into the body.
If the O-Ring pallet is used, the flat sealing
surface of the insert may be lapped, using a
flat lapping block.
If the film pallet is used, the sealing radius
may be hand polished, very carefully. The
radius must be uniform and not exceeding
.030”.
ASSEMBLY
Model 1660A: This model has one support
plate riveted [3] to the spindle cap. Screw the
jam nut [47] onto the spindle rod [13] and
screw the rod into the spindle cap [22] until it
is flush with the top surface of the support
plate [4]. Then tighten the jam nut securely.
Figure 6: Spindle Assembly-Model 1660A
Models 1661A+1662A: The actuator
diaphragm is mounted between the upper
(vacuum) [4.1] support plate and the lower
(pressure) [4] support plate. Thread the
spindle rod [13] through the upper spindle cap
[22].
Temporarily seat the spindle tube against the
cap and adjust the rod until it extends 3/16”
beyond the lower end of the tube. Remove
the tube and install the O-Ring [48], pressure
support plate [4], diaphragm [15],
Fluoropolymer washer [50], vacuum support
plate [4.1], and flat washer [49]. Install the
jam nut [47] and tighten securely.
Figure 7: Spindle Assembly-Model 1661A-62