(lo)
(11)
(12)
TM 9-2320-279-34-3
Hydraulic System Maintenance Instructions (Cont)
Remove rod scraper (19), seal
housing (20), backup ring (21),
preformed packing (22),
backup ring (23), and
preformed packing (24) from
piston rod (18).
Using valve seat tool, remove
valve seat (25), preformed
packing (26), valve
poppet (27), preformed
packing (28), and spring (29).
Remove backup ring (30),
preformed packing (31), and
backup ring (32).
b. Cleaning/lnspection.
WARNING
Adhesives, solvents, and
sealing compounds can burn
easily, can give off harmful
vapors, and are harmful to
skin and clothing. To avoid
injury or death, keep away
from open fire and use in
well-ventilated area. If
adhesive, solvent, or sealing
compound gets on skin or
clothing, wash immediately
with soap and water.
(1) Clean all metal parts with dry cleaning solvent.
(2) Inspect pump body for cracks and stripped threads.
(3) Inspect pump body ports for scratched valve seating areas.
(4) Inspect poppet valve seats for scratches and grooves.
(5) Inspect seal retainer for stripped threads.
(6) Inspect valve seats for scratches and grooves.
(7) Inspect springs for breaks.
(8) Inspect inside of bushings for out-of-round condition.
c. Assembly.
(1)
(2)
(3)
Install backup ring (1),
preformed packing (2), and
backup ring (3) on piston
rod (4).
Install spring (5), preformed
packing (6), valve poppet (7),
preformed packing (8), and
valve seat (9). Using valve seat
tool, tighten valve seat to
90 to 100 lb-in. (10 to 11 N m).
Install preformed packing (10),
backup ring (11), preformed
packing (12), backup ring (13), seal housing (14), and rod scraper (15).
20-3
