Graco 2730B - Page 22

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Pump Service: 2730 Pressure Washers
6. Lightly grease the retaining screw and the outer end
of the plunger. Place the washer, O-ring, and
backup ring around the screw, and install the nut
through the plunger. Torque to 11 ft-lb (15 NSm).
NOTE: If you plan to replace the packings, see Serv-
icing the V-packings at right.
7. Lubricate the outside of each plunger. Slide the
manifold onto the crankcase, being careful not to
damage the seals.
8. Install the capscrews and washers finger tight.
Torque the screws to 8.8 ft-lb (12 NSm) following
the tightening pattern (Fig. 1). Uneven tightening
could cause the manifold to bind or jam.
14
2
3
5
8
7
6
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Fig. 1
Servicing the V-Packings
1. Remove the manifold as outlined in Pumping
Section on page 21.
2. Carefully pull the packing retainer from the manifold.
Examine the O-ring, and replace if cut or dam-
aged.
3. Remove the V-packing and head ring. Pull out the
intermediate retainer ring. Remove the second
V-packing and second head ring.
4. Inspect all parts, and replace as necessary.
5. Thoroughly clean the packing cavities, and examine
for debris or damage.
6. Lightly grease the packing cavities, and replace the
packings in the following order: head ring, V-pack-
ing, intermediate ring, head ring, V-packing, pack-
ing retainer. Install the O-ring in the retainer
groove.
CAUTION
Install the parts in the proper order and facing the
proper direction. Improperly installed parts will
cause a malfunction.
7. Reassemble the manifold as instructed in Servicing
the Plungers on page 21.