Service
3A6584A 5
Repair When Pump is Separated
From Sprayer
Disassembling the Pump
1. Remove packing nut (202) and o-ring (228).
2. Unscrew intake valve from cylinder.
3. Disassemble intake valve. Clean and inspect o-ring
(227).
NOTE: A pick may be required to remove o-ring.
NOTE: Spring (233) only used on 17H830, 16X423, and
17H831
4. Tap piston rod out of cylinder with a hammer or flip
over and tap piston rod out against a bench. Sleeve
may come out of cylinder with piston rod.
5. Remove piston rod from sleeve, or remove sleeve
from cylinder. Mark IV and Mark VII models:
Remove sleeve spacer (230) from sleeve.
NOTE: All Mark
and HD pumps
NOTICE
To reduce the risk of damaging sealing surfaces, never use
sharp or pointed tools to remove sleeve. If the sleeve cannot
be removed easily, return the sleeve and cylinder to a Graco
distributor for removal.
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