TM 9-2320-279-20-3
Hydraulic System Maintenance Instructions (Cont)
19-4.
HYDRAULIC RELIEF VALVE REMOVAL/REPAIR/INSTALLATION (CONT).
b.
Disassembly.
NOTE
Heat may be required to remove two plugs,
(1)
Remove two plugs (1) from hydraulic
relief valve (2).
(2)
Remove plug (3) and preformed
packing (4).
(3)
Remove two adapters (5) and preformed
packings (6).
WARNING
Wear safety glasses when removing
retaining rings to prevent injury or
blindness.
NOTE
M1977-CBT has a different control valve
which is removed and installed the same
way. Refer to TM 9-2320-279-24P for
proper identification of parts.
(4)
Hold control valve (7) through port (8)
and remove retaining ring (9).
Spring is under pressure. Release control valve slowly or personal injury may result from
flying parts.
(5)
Remove control valve (7) and spring (10) from hydraulic relief valve (2).
c.
Cleaning/Inspection.
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 metal parts in drycleaning solvent.
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with
effective chip guarding and personal protective equipment, goggles, shield, and gloves.
(2) Dry metal parts with compressed air.
(3) Inspect each part for damage.
(4) Replace damaged parts.
19-8
Change 3
