TM 5-4310-379-14
4-27.
Compressor Hydraulic Unloader Assembly (Cont).
b.
Repair. (figure 4-38)
(1)
Remove retaining ring (1) securing spring retainer (2) and spring (3) to body (4) and remove spring retainer and
spring.
(2)
Remove v-ring (5) from piston (6).
(3)
Remove roll pin (7) securing piston (6) to body (4) and remove piston.
(4)
Remove piston (8), ball (9), and push rod (10) from body (4).
(5)
Remove quad ring (11) from body (4).
(6)
Remove three screens (12) and two filters (13) from body (4).
(7)
Remove cap (14) securing spring (15) and outer valve (16) to body (4) and remove spring and outer valve.
(8)
Clean hydraulic unloader assembly using TPS ultrasonic cleaner w/heater following cleaning instructions in
Chapter 3. Clean components soft goods in accordance with Chapter 3.
(9)
Inspect hydraulic unloader assembly components for cracks, bent or broken parts, worn or other signs of
damage.
(10)
Replace any component that is worn, bent, broken, cracked or otherwise damaged.
(11)
Install outer valve (16), spring (15), and secure with cap (14).
(12)
Install three screens (12) and two filters (13) in body (4).
(13)
Install quad ring (11) on body (4).
(14)
Install push rod (10), ball (9) and piston (8) in body (4).
(15)
Install piston (6) on body (4) and secure with roll pin (7).
(16)
Install v-ring (5) on body (4).
(17)
Install spring (3), spring retainer (2) and secure with retaining ring (1).
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