Displacement Pump Repair - Graco ULTRA 500 231-032 Instructions-Parts List Manual

Airless paint sprayer series c, series b, series d

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Table Of Contents

Table of Contents

3. Tighten the packing retaining nut (211) against the

piston valve (222) to 19 ft-lb (27 N.m).

Note the alignment of the piston (222) to the pack-

ing retainer nut (211). Maintain this alignment

through Steps 5, 6 and 7.

4. Place the ball (225) on the piston valve (222). See Fig

37–1.

CAUTION

Step 5 is critical. Follow the procedure carefully to

avoid damaging the packings by overtightening.

5. Apply one drop of adhesive, supplied, to the piston

valve threads. Then hand tighten the valve assembly

into the piston rod just until the nut (211) contacts the

rod. See Fig 37–1.

TORQUE TO

10.5 in-lb (1.2 N.m)

to seat the packing,

and then back off and

tighten finger tight.

211

*210

*212

POLY

LIPS FACE UP

222

Fig 37–1

6. Place the flats at the top of the rod in a vise.

7. Use a wrench to CAREFULLY tighten the nut (211)

onto the piston rod to 19 ft-lbs (25 N.m). See Fig

37–2.

Use two wrenches to maintain the alignment men-

tioned in Step 7, above.

211

TORQUE NUT

AGAINST ROD TO

19 ft–lb (27 N.m)

DO NOT ALLOW NUT

(211) TO MOVE WHEN

INSTALLING PISTON

ONTO ROD

Fig 37–2

8. Stack the male gland (208*), alternate packings

(213*,207*), and female gland (209*) into the top of

the cylinder (219). See Fig 37–3.