Graco Dyna-Star 77X000 Instructions Manual page 24

Repair
Reassembly
NOTE:
• Before reassembly carefully clean and inspect all
parts and pump surfaces for scratches and damage.
A pump with damaged parts will not hold pressure
or operate efficiently.
• Use all new parts included in kit for reassembly.
1. Apply a thin layer of grease to the packing u-cup
(202).
2. Use a flat, blunt-end tool to seat u-cup (202), with
the lips facing down, into the pump adapter (2) (F
34).
NOTE: Do not damage u-cup seal on threads during
installation.
202
2
2
F . 34
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3. Install hex nut (201) inside pump adapter (2). Use a
wrench to tighten nut securely (F
18-22 ft lbs (24 - 30 N.m)
4. Apply a thin layer of grease to the surface of dis-
placement rod (212). Slide rod into the pump
adapter (2) in the direction shown in F
24
202
201
lips
down
. 34). Torque to
IG
. 35 only.
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Sliding displacement rod (212) into the pump adapter
from the other side of the pump adapter (2) could
damage the throat seal (201), resulting in a poor seal
and fluid leakage during operation.
.
IG
F . 35
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5. Slide together piston rod (213) and piston seal (214)
(F . 36).
IG
213
F . 36
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6. Thread piston rod (213) into end of displacement
rod (212). Hand tighten the two pieces together
securely, ending with hole (213a) (F
with hole (212a) (F
NOTICE
212
2
214
213a
. 36) aligned
IG
. 37).
IG
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