HydraMaster MAXX 450D - Page 143

MAXX 450D/470D/Diesel Page 6-3
HydraMaster Corporation
10/24/02
2. Removing the High Pressure Manifold
A. Using an M6 allen wrench, remove all eight of the socket head bolts.
B. Rotate the crankshaft by hand to start separation of the manifold head
from the crankshaft.
C. Insert two flat-head screwdrivers on opposite sides to further separate the
manifold from the crankshaft.
To avoid damage to either plunger or seal, keep the manifold properly aligned
with the ceramic plungers when removing it.
D. Remove the seal retainer from the manifold and inspect for wear.
E. Examine the ceramic plunger for cracks or scoring (refer to Servicing
the Plungers for replacement)
3. Servicing the Low Pressure Seals and High Pressure Seals
(See illustrations above.)
A. Remove the low pressure seal from the seal retainer using a 90 degree
pick tool.
B. Remove the high pressure seal from the manifold.
C. Inspect the low pressure seal and high pressure seal for wear and
replace if necessary.
D. Reinstall the low pressure seal:
1. Install the low pressure seal into the seal retainers with the garter
spring down.
E. Reinstall the high pressure seal:
1. Lubricate the seal chamber in the manifold.
2. Carefully square the high pressure seal into position by hand with
the grooved side down (metal back facing out).
CAUTION
!