Graco 2900 psi - Manual (Page 9)

308524 9
Pump Service
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
screw through the plunger. Torque to 14.4 ft-lb
(19.5 N
Sm).
NOTE: If you plan to replace the packings, See
Servicing 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 21.7 ft-lb (29 N
Sm) following
the tightening pattern in Fig. 3. Uneven tightening
can cause the manifold to bind or jam.
1 4
2 3
5
8
7
6
Fig. 3
Servicing the V-Packings
NOTE: There are two types of packing kits:
801486 contains packings only.
801487 contains packings, rings, and retainers.
1. Remove the manifold as outlined in Pumping
Section on page 8.
2. Carefully pull the packing retainer (43) from the
manifold. Examine the o-ring (42), and replace if
cut or damaged.
3. Remove intermediate ring (46). Pull out restop
v-packing (47). Remove the second V-packing (44)
and ring head (45).
4. Inspect all parts, and replace as necessary.
5. Thoroughly clean the packing cavities, and
examine for debris or damage.
6. Lightly grease packing cavities, and replace packings
in following order: ring head (45), V-packing (44),
restop packing (47), intermediate ring (46). Install
o-ring (42) in retainer groove and then install retainer
ring (43) with low pressure seal (57).
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 8.