PAR 30-31
DESCRIPTION AND OPERATION OF
CHAP 2, SEC IV
RIGHT- AND LEFT-OUTPUT DRIVE ASSEMBLIES
lubrication regulator valve. The pressure
maintained at this point is sufficient to
b a l a n c e t h e c o m p r e s s i o n o f t h e s p r i ng
pushing the valve upward. This pressure
forces oil through the lubrication passages.
Oil flow in excess of lubrication require -
ments returns to the sump through an ex-
haust port at the right side of the valve
bore.
31. HYDRAULIC SYSTEM FUNCTION –
FIRST GEAR (fig. 7)
N o t e : Refer to par. 47 and fig. 23
for the torque path through the
power train.
a . F u n c t i o n s i n f i r s t g e a r a r e t he
same as those described for neutral in par.
3 0 , a b o v e,
e x c e p t t h a t t h e l o w - r a n ge
c l u t c h i s e n g a g e d a n d t h e v e h i c l e i s
moving.
b . When the manual selector valve is
moved to first gear position, a port is un-
covered which directs main pressure to
t h e l o w - r a n g e c l u t c h M o v e m e n t o f t he
manual selector valve lever puts a lug on
the lever in a position which will allow the
s h i f t i n h i b i t o r p l u n g e r t o e x t e n d a n d
prevent shifting to neutral or reverse at
higher speeds.
c . W h e n t h e v e h i c l e i s m o v i n g f o r-
ward with the brakes released, the brake
a i r v a l v e s ( t e x t c o n t i n u e s o n p a g e 3 1)
Change 2 28.1/(28.2 blank)
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