10
1. With a 22mm socket, remove
the three discharge (43) and
three inlet (41) manifold plugs.
Check o-ring (44) for wear and
replace as necessary.
P55W / P56W / P56W-HK REPAIR INSTRUCTIONS
NOTE: Always take time to lubricate all metal and nonmetal parts with a light film of oil before reassembly.
This step will ensure proper fit, at the same time protecting the pump nonmetal parts (i.e., the elastomers)
from cutting and scoring.
3. Use a small slide hammer to
remove valve seats (37) from
manifold (29). Inspect valve
plates (36) and valve seats (37)
for wear. If excessive pitting is
seen, replace the worn parts.
Check valve seat o-ring (38) for
wear and replace as necessary.
Tighten manifold plugs (41 and
43) to 50 ft.-lbs.
2. Remove the discharge spring
retainer (34), valve spring (35),
and valve plate (36).
8. Inspect and clean the manifold and pressure ring.
Reinstall the pressure ring (30) with the groved side
pointed towards the front. Insert v-sleeve (31) high
temperature seals ( 31A for P56W-HK &P56HT
pumps), support ring (32), and pressure spring (33) into
the manifold (29).
30
32
33
4. Drain the oil from the pump.
Turn the pump over to remove
the four manifold stud nuts (46)
with a 17mm wrench.
7. Turn the manifold (29) over.
Using a 15mm socket, tap out
the v-sleeves, Insert v-sleeve
(31) high temperature seals
( 31A for P56W-HK &P56HT
pumps), support rings (32), and
pressure rings (30) through
back of manifold.
5. Tap the back of the manifold
(29) with a rubber mallet to
dislodge, and slide off the
pump.
6. From the front inlet valve ports,
remove the inlet valve assembly
(34-40) and pressure springs
(33).
31
31A
(P56W-HK & P56HT)
