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11. Inspect o-rings (#21 and 22)
and replace as necessary.
9. Remove the pressure rings
(#24) and grooved seals (#23)
from the valve casing (#26).
Inspect parts for wear and
replace if necessary.
For P318 only, the spacers
(#23A) can now be removed.
10. Remove the weep grooved
seals (23A for all pumps
except P318 & #23 for P318
only) from the seal case
(#20). For P316, P317, &
P319 pumps only, remove the
pressure rings (#24).
12. For all pumps (except P318),
use a flat screw driver to pry
the oil seals (#19) loose from
the seal case (#20) .
For P318 Pumps
Note: Occasionally, this
procedure can be carried out
for P318 pumps. However,
for P318 pumps which have
the oil seals that remain in the
crankcase, use a 6mm allen
wrench to first loosen and
remove the tension screw
(#16C) from the plunger
pipes (#16B). Use a flat
screwdriver to pry the oil
seals loose from the crank-
case (#1).
13. Check surfaces of the plunger
bases and plunger pipes
(#16B). A damaged surface
will cause accelerated wear on
the seals. Deposits of any kind
must be carefully removed
from the plunger surface. A
damaged plunger must be
replaced!
13A. P318 Only! Clean the old
sealant from the threads of the
tension screw and the plunger
base (16A). Place plunger pipes
over plunger base and secure
with tension screw to 220 in-lbs.
REPAIR INSTRUCTIONS - P300 SERIES