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Allison Transmission AT 540 - Page 45

Allison Transmission AT 540
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38
PROPER TORQUE (cont’d)
Neutral start switch to transmission housing — 50–60 lb ft (68–81 N·m)
Reverse signal switch to transmission housing — 4–5 lb ft (5–7 N·m)
Modulator retaining bolt — 10–16 lb ft (14–22 N·m)
Retarder low speed cutoff switch in transmission housing — 4–5 lb ft
(5–7 N·m)
Retarder temperature sensor fitting in retarder valve body — 15–20 lb ft
(22–27 N·m)
Retarder main pressure tap fitting in transmission housing and in retarder
valve body — 4–5 lb ft (5–7 N·m)
COOLER, AIR, AND VACUUM LINES
Check for leaks
Check for tightness of connections
Check routing
LINKAGE
Shift selector
Adjustment (at all positions)
Ease of movement
Neutral safety switch (start only in neutral)
Shift tower (for freedom of operation)
Mechanical modulator control
Adjustment (proper shift points)
Ease of operation
Routing
Parking brake
Adjust for proper clearance
Adjust for full apply
Check for full release

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