b. Remove stripper bolt (33), spring guides (31)
CLEAN PARTS IN SOLVENT P-D-680 AND
and spring (32).
BLOW DRY WITH COMPRESSED AIR.
c. Remove two screws (25) and retainer plates
INSPECT SPOOL BORE FOR CRACKS,
d. Remove preformed packings (28), back-up rings
PITTING SCORING AND WEAR. REPLACE AS
(29) and spool (27) from valve body.
e. Remove check cap (37), preformed packing
INSPECT SPOOL FOR SCORING AND WEAR.
(38), check spring (39) and poppet (40).
REPLACE AS NECESSARY.
f. Remove plugs and preformed packings (24)
from unused ports.
Install new packings and seals on or
in all component parts.
packings and seals with clean
Dry cleaning solvent P-D-680 is toxic
hydraulic fluid prior to assembly.
goggles and gloves and use only in a
REMOVE ANY BURRS FROM FACES OF
well ventilated area. Avoid contact
VALVE SECTIONS AND ENSURE ALL MATING
with skin, eyes, and clothes and do
SURFACES ARE CLEAN.
not breathe vapors. Do not use near
REASSEMBLE VALVE SECTION (30).
open flame or excessive heat. The
flash point is 100F-138F (38-59C).
a. Install new packings onto plugs.
If you become dizzy while using
cleaning solvent, get fresh air
b. Install poppet (40), spring (39), new preformed
immediately and get medical aid. If
packing (38) and check cap (37).
contact with eyes is made, wash your
eyes with water and get medical aid
c. Install spool (27).
d. Install new preformed packings (28) and back-up
Compressed air used for cleaning
rings (29) on both sides of spool. Retain on
purposes will not exceed 30 psi. Use
clevis end of spool with retainer plate (26) and
only with effective chip guarding and
(goggles/ shield, gloves, etc.).
e. Install retainer plate (26), spring guides (31) and
spring (32). Secure with stripper bolt (33).
f. Install valve cap (34) and screws (35).