Install new packings and seals on or
Dry cleaning solvent P-D-680 is toxic
in all component parts.
packings and seals with clean
goggles and gloves and use only in a
hydraulic fluid prior to assembly.
well ventilated area. Avoid contact
with skin, eyes, and clothes and do
REMOVE ANY BURRS FROM FACES OF
not breathe vapors. Do not use near
VALVE SECTIONS AND ENSURE ALL MATING
open flame or excessive heat. The
SURFACES ARE CLEAN.
flash point is 100F-138F (38-59C).
If you become dizzy while using
REASSEMBLE VALVE SECTION (26).
cleaning solvent, get fresh air
immediately and get medical aid. If
a. Install new packing onto plug (20).
contact with eyes is made, wash your
eyes with water and get medical aid
b. Install spool (23).
c. Install new preformed packings (31) and back-up
Compressed air used for cleaning
rings (32) on both sides of spool. Retain on
purposes will not exceed 30 psi. Use
clevis end of spool with retainer plate (22) and
only with effective chip guarding and
(goggles/ shield, gloves, etc.).
d. Install retainer plate (22), spring guides (27) and
spring (28). Secure with stripper bolt (29).
CLEAN PARTS IN SOLVENT P-D-680 AND
BLOW DRY WITH COMPRESSED AIR.
e. Install valve cap (30) and screws (31).
REASSEMBLE RELIEF VALVE (5).
INSPECT SPOOL BORE FOR CRACKS,
a. Install seat (9).
PITTING SCORING AND WEAR. REPLACE AS
b. Install new preformed packing (10) and back-up
ring (11) on plunger (12).
INSPECT SPOOL FOR SCORING AND WEAR.
REPLACE AS NECESSARY.
c. Install plunger (12), spring (13), adjusting screw
(14) with new preformed packing (6) into
cartridge (8). Secure with locknut (15).