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SERVICE
Pump
(Refer to Parts Drawing, Page 11)
NOTE:
Three .sizes of metric wrenches are
necessary for servicing the pump; M13,
M30.
and M10.
Valves:
1.
Remove the hex plug (1 6) from manifold (1 7) using
M30 wrench.
2.
Examine o-ring
(1
5)
under plug and replace if cuts
or distortion exist.
3. Remove valve unit and o-ring (14) from cavity.
NOTE:
Valve
unit
may come apart during
removal.
4.
Replace valves with Kit
No.
801
-472 if necessary.
5.
Replace hex plug and torque to 75
ft.
Ibs.
(10.3
K/m).
NOTE:
Hex plug should be re-torqued after
5
hours operation.
Pumping Section:
1.
Removethe16capscrews(l2)fromthemanifolds
using the M13 wrench.
2. Carefully separate the manifolds from the
crankcase.
NOTE:
It
may
be
necessary to tap manifold
lightly
with
mallet to loosen.
r-CAuT'oN7
plungers when removing
to
avoid damage
to
Keep manifold properly aligned with ceramic
plungers or seals.
3.
Carefully examine each plunger (27) for any
scoring and replace if necessary.
Servicing Plungers:
1. Loosen plunger retaining screw
(23)
5-6 turns,
using
"10
wrench.
Push
plunger towards
crankcase. This
'
will
separate plunger and
retaining screw.
2.
Remove retaining screw from plunger and
examine o-ring (29) back-up ring (28) and copper
bearing/gasket washer (24). Replace if necessary
using plunger repair kit P/N 801-474.
3. Remove plunger from plunger rod and remove
copper flinger (26). Clean or replace if necessary.
4.
Lightly grease flingerand replace
it
on plungerrod.
5. Replace plunger.
6.
Lightly grease retaining screw assembly to avoid
cutting o-ring;Lightlygrease outer endof plunger.
16
801-765
7.
Install retaining screw assembly into plunger and
torque to 14.4 ft. Ibs. (2 K/m).
8.
Lubricate each plunger and carefully slide
manifolds onto crankcase.
9.
Replace the 16 capscrews and snug them up.
Torque to 21.7
ft.
Ibs. (3 K/m).
NOTE:
The eight capscrews on each manifold
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 manifold first and then
working out from those bolts.
Servicing V-Packings:
NOTE:
Use
packing repair 'kit
P/N
801
-769.
1.
After removing the 16 capscrews and the
the manifold. Examine o-ring (21) and replace if
manifolds carefully pull packing retainer (30)from
necessary.
2. Rem'ove low pressure packing (19) and head ring
(1
8).
3.
Pull
intermediate retainer ring (31
1
from manifold.
(1 9) and head ring (1 8).
Remove long life ring
(20).
high pressure packing
4.
Inspect all parts and replace if necessary.
NOTE:
If just the packings are needed
use
kit
801-769. If rings or retainers need
replacement use kit 801-770.
5.
Thoroughly clean packing cavity
in
manifold and
examine. Lightly grease packing cavity.
6:Replace packing assembly
in
the following order:
head ring
(18).
packing
(19).
long life ring
(20).
packing retainer (30) and o-ring (21).
intermediate ring (31
),
head ring (1 8). packing(19).
CAUTION
Carefully study the location of each part and the
position of the seals to assure proper
reassembly and operation.
7.
Lubricate each plunger and carefully slide
manifold onto crankcase.
NOTE:
When replacing the manifold onto .. .
plungers, extreme caution should be
exercised to avoid damage to the seals. .~
I
8.
Replace the 16 capscrews
in
the manifolds and
servicing plungers).
tighten as previously described (step 9 under