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Graco 563918 Manual page 3

Mvb pump piston and seal repair kit

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Reassembly
Reference numbers used in the following instructions
refer to Parts, page 4.
NOTE: Lubricate all o-rings and retaining rings (7 and 8)
with grease prior to installation
1. Reassemble o-rings, retaining rings (7) and
indicator port adapter (a) on piston valve assembly
(5). Refer to parts illustration provided on 4 for
proper orientation when reassembling these parts.
2. Place pump cylinder in soft-jaw vise right side up.
Install check ball (8a) and spring (3) in pump.
3. Install piston valve assembly (5) in pump cylinder.
4. Install pipe plug (8h).
NOTE:
Hold (a) (F
. 2) with a 13/16 wrench when
IG
installing pipe plug.
5. Remove pump cylinder from vise and turn it over.
Replace pump in soft-jaw vise.
6. Install retention spring (4), spring retainer (1), ring
retainer, piston guide (6) and self locking ring (8e)
through bottom of pump cylinder.
7. Press on the piston guide (6) to assure free
movement of the piston.
8. Reinstall the pump on the MVB Gearbox.
9. Remove the pipe plug (8h) from the top of the
indicator adapter.
10. Bleed the pump of all air by cycling the pump until
oil flows from the port.
11. Re-install the plug (8h).
12. Set the adjustment to the desired output (page 4).
13. Tighten the cylinder retaining screw.
3A2603D
Installation
3

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