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SERVICE
pump
(Refer to Parts drawing, Page 11)
NOTE:
Two sizes
of
metric wrenchesare necessary
for servicing the pump;
M13
and
M30.
Valves:
1. Remove the hex plug (5)from manifold(6)using
M30
wrench.
2. Examine O-ring
(4)
under plug and replace if cuts or
distortion exist.
3. Remove valve unit and O-ring
(3)
from cavity
NOTE:
Valve unit may comeapartduring removal.
4. Replace valve unit with P/N 801 -472.
5.
Replace hex plug
and
torque to75ft.
lbs.(10.3
Wm).
NOTE:
Hex plug .should be re-torqued after
5
. ~
hours operation.
Pumping Section:
1, Remove the eight cap screws (1) from the manifold
using the M13 wrench.
2. Carefully separate the manifold from
the
crankcase.
NOTE:
It may be necessary to tap manifold lightly
with mallet to loosen.
CAUTION
Keep manifold properly aligned witli ceramic
plungers when removing to avoid damage to
plungers or seals.
3.
Carefully examine each plunger (1
6)
for any scoring
and replace if necessary.
Servicing Plungers:
1. Loosen plunger retaining screw(l.2)5-6turns, using
"10 wrench. Push plunger towards crankcase.
This
will
separate plunger and retaining screw.
2. Remove retaining screw from plunger and examine
O-ring (18). back-up ring
(17),
and copper
bearing/gasket washer (13). Replace if necessary
using plunger repair kit P/N 801474.
3.
Remove plunger from plunger
rod
and remove
copper flinger
(1
5). Clean or replace if necessary.
4. Lightly grease flinger and replace it
on
plunger rod.
5.
Replace plunger
6. Lightly grease retaining screw assembly to avoid
cutting O-ring. tightly grease outer end
'of
plunger,
7. Install retaining screw assembly into plunger and
torque to 14.4
ft.
Ibs. (2 K/m).
8.
Lubricate each plunger and carefully slide manifold
onto crankcase.
9. Replace the eight capscrews and snug them up.
Torque to 21.7
ft.
Ibs.
(3
Wm).
.
.NOTE:
The eight capscrews must be torqued
evenly to apply equal pressure on- the
manifold
so
that
it
seats properly and
doesn't bind or jam. This is best done by
torquing bolts closest to the center of the
those bolts.
manifold first and then working out from
Servicing V-Packings:
NOTE
Use packing repair kit P/N 801 -486.
1. After removing the eight capscrews and the
!
manifold carefully pull packing retainer (19)from the
manifold. Examine O-ring
(10)
and replace if
necessary.
2.
Remove low pressure packing
(8)
and head ring (7).
3.
Pull intermediate retainer ring (20) from manifold.
and head ring (7).
Remove long life ring
(9).
high pressure packing (8)
4.
lnvpecr all parts and replace if necessary.
NOTE:
If just the packings are needed use
kit
801
-
486. If rings or retainers need replacement
use kit
801
-487.
5. Thoroughly clean packing cavity in manifold and
examine. Lightly grease packing cavity.
6.
Replace packing assembly
in
the following order:
head ring (7). packing (8). long life ring (9).
packing retainer (19). and O-ring (10).
intermediate ring
(20).
head ring
(7).
packing
(8).
CAUTION
Carefully study the location of each part and the
and operation.
position of the seals to assure proper reassembly
7.
Lubricate each plunger and carefully slide manifold
onto crankcase.
NOTE:
When replacing the manifold onto
exercised to avoid damage to the seals.
plungers, extreme caution should be
8. Replace the eight capscrews in the manifold and
tighten
as
previously described (step 9 under
servicing plungers).
10
801-644