Repair
7-14
E1999 Nordson Corporation
All rights reserved
104 330H
Issued 8/99
Manual 1-8
Standard Type F and optional Type A and Type U packing glands should
be removed and replaced as an assembly. Kits are available for
replacement which include new packing glands and O-rings. A kit is
available to rebuild optional Type G packing glands. Refer to the
Parts
section for partnumbers.
Clean all components of the hydraulic section. Inspect and replace worn
or damaged parts. Check the plunger for scoring, cracking, or pitting. If
the plunger surface is not smooth, replace the plunger. Ball checks can
be tested by placing the seat on top of the ball, or ball on seat, and filling
with water. If water leaks around the ball, replace the ball and seat.
NOTE: Lubricate all O-rings with O-ring grease before installation.
1.See Figure 7-4. Place the flats at the top of the plunger between the
jaws of a vise. Place the ball (19) into the bore at the bottom of the
plunger (5).
2.Install the lower seal assembly onto the plunger (5).
SType A and Type F Packings: Install the upper back-up washer
(6) onto the plunger. The upper back-up washer (6) has a smaller
diameter than the lower backup washer(8) and a thinner
cross-section. Place the U-cup (7) on top of the upper backup
washer, with the lip facing downward, towards the upper backup
washer. Place the lower backup washer (8) on top of the U-cup.
SType U Packings in 4:1 Hydraulic Sections: See Figure 7-5.
Install the spacer (6) onto the plunger (1). Place the wave spring
(5) on top of the back-up washer. Place the male adapter (2) on
top of the wave spring with the flat side down. Place the V-rings
(3) over the male adapter with the lips of the V-rings facing down.
Place the female adapter (4) over the V-rings with the flat side
facing up.
3.See Figure 7-4. Install a new O-ring (18) on the pressure ball
seat(17). Thread the pressure ball seat into the plunger. Tighten
securely.
Packing Glands
Cleaning and Inspection
Assembly
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