Giant P450-5100, Инструкция по эксплуатации / Руководство по ремонту и обслуживанию

Страница: 6 / 12

6
REPAIR INSTRUCTIONS - P450-5100
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.
1) With a socket wrench,
remove the three dis-
charge valve plugs and
three inlet valve plugs
(32). Inspect the o-ring
(33) for wear and replace
if damaged.
2) Using needle nose pliers,
remove the inlet and dis-
charge valve assemblies
(27A). Note: It may be-
come neccesary to re-
move the valve seat (27)
from the valve casing us-
ing a slidehammer.
3) By inserting a small screw
driver between the valve
seat (27) and the valve
spring retainer (30), the
valve assembly can be
separated.
4) Remove the o-ring (31).
Inspect all parts for wear
and replace as necessary.
Apply one drop of loctite
243 to the valve plugs (32)
and tighten to 125 lb-ft (170
Nm)
5) Use a 8mm allen
wrench to remove the 8
socket head cap screws
(34). Carefully slide the
valve casing (26) out over
the plungers.
6) Remove seal adaptors
(20) and weep return
rings (25) from the valve
casing.
7) Remove the pressure
rings (24) and v-sleeves
(23) from the valve
casing (26).
8) Remove the weep
grooved seal (23) out of
the seal adaptor (20).
Check O-rings (21).
IMPORTANT! The grooved
seal (23) on the high-pressure
side is to be fitted carefully into
the valve casing (26) using a
screwdriver. Under no circum-
stances must the seal surface
in the valve casing or the seal
lip be damaged.