POWER SHIFT TRANSMISSION
TESTING AND ADJUSTING
TM 5-3805-263-14&P-2
TRANSMISSION CONTROL GROUP
1. Pilot valve group (first level). 2. Direction selector and pressure control valve group (second level). 3. Selec-
tor and pressure control group (third level). 4. Selector and pressure control group (fourth level). 5. Manifold.
B. Pressure tap for speed clutch (P1). C. Pressure tap for direction clutch (P2). E. Pressure tap for pilot
pressure.
PILOT VALVE GROUP (FIRST LEVEL)
1 . P i l o t v a l v e g r o u p . 6 . S p o o l . 7 . D r a i n c a v i t y . 8 . P i l o t
pressure cavity.
SELECTOR AND PRESSURE CONTROL GROUP
(THIRD LEVEL)
3. Selector and pressure control group.
14. Manual modula-
tion valve. 15. Differential, check, and safety valve. 16.
Speed selector spool.
17. Speed selector spool.
18. Passage
to No. 4 clutch.
19. Passage to No. 5 clutch.
DIRECTION SELECTOR AND PRESSURE CONTROL
VALVE GROUP (SECOND LEVEL)
2. Direction selector and pressure control valve group. 8.
P i l o t p r e s s u r e c a v i t y .
9 . S p o o l .
10. System pressure
cavity. 11. Priority reducing valve. 12. Passage to forward
(No. 1) clutch.
13. Passage to reverse (No. 2) clutch.
SELECTOR AND PRESSURE CONTROL GROUP
(FOURTH LEVEL)
4. Selector and pressure control group.
20. Load piston. 21.
Modulating reducing valve. 22. Spacers. 23. Speed selector
spool (three position).
24. Passage to No. 6 clutch. 25.
P a s s a g e t o N o . 7 c l u t c h . 2 6 . S p o o l s e l e c t o r s p o o l . 2 7 .
Passage to No. 3 clutch.
2-36
