TM 9-2320-280-34
17-28. CONTROL VALVE AND ACCUMULATOR HOUSING REPAIR (4L80-E) (Cont'd)
c. Control Valve Disassembly
1.
Remove manual valve (30) from body (2).
2.
Remove screen filter (1) from body (2).
NOTE
A 5/64-in. (1.984-mm) drill bit may be used to remove spring pins.
While rotating drill bit lift and remove spring pins.
3.
Remove spring pin (9), plug (8), ball (7), bushing (6), preformed packing (5), 3-4 shift valve (4), and
spring (3) from body (2). Discard preformed packing (5).
4.
Remove capscrew (10), 2-3 shift solenoid (11), spring pin (12), 2-3 shift valve (13), and spring (14)
from body (2).
5.
Remove capscrew (18), 1-2 shift solenoid (19), spring pin (17), 1-2 shift valve (16), and spring (15)
from body (2).
6.
Remove spring pin (20), plug (21), and filter (22) from body (2).
7.
Remove sleeve (25), plug (24), and ball (23) from body (2).
8.
Remove capscrew (31), clamp (32), and pressure control solenoid (33) from body (2).
9.
Remove clip (37), PWM solenoid (38), spring pin (36), TCC valve (35), and spring (34) from body (2).
10.
Remove retainer plate (39), spring (40), and feed limit valve (41) from body (2).
11.
Remove spring pin (26), plug (27), spring (28), and accumulator valve (29) from body (2).
d. Control Valve Cleaning
Clean all parts in accordance with para. 2-13.
e. Control Valve Inspection
1.
Inspect valves (4), (13), (16), (29), (30), (35), (41), and bushing (6) for scoring, nicks and scratches.
Replace control valve assembly if damaged.
2.
Inspect shift solenoids (11) and (19) for O-ring damage. Replace if damaged.
3.
Inspect springs (3), (14), (15), (28), (34), and (40) for damage or distorted coils. Replace if damaged.
4.
Inspect body (2) for cracks, interconnected passages, and damaged machined surfaces. Replace
control valve if damaged.
5.
Inspect screen filter (1) for damage. Replace if damaged.
f. Control Valve Assembly
1.
Install accumulator valve (29), spring (28), and plug (27) in body (2) with spring pin (26).
2.
Install feed limit valve (41) and spring (40) in body (2) with retainer plate (39).
3.
Install spring (34) and TCC valve (35) in body (2) with spring pin (36). Install PWM solenoid (38)
with clip (37).
17-120
Change 2
