Dodge Sprinter 2006 Manual page 1869

VA
FLU I D AN D FI LT ER
DESCRIPTION
Fig. 147 Fluid Level Control
1 - GEARSET CHAMBER
2 - OIL GALLERY
3 - SHELL OF ELECTROHYDRAULIC UNIT
4 - ELECTROHYDRAULIC UNIT
5 - FLOAT
6 - OPENING
Th e oil level con t r ol (F ig. 147) is loca t ed on t h e
elect r oh ydr a u lic u n it (4) a n d con sist s of t h e floa t (5)
wh ich is in t egr a t ed in t o t h e elect r oh ydr a u lic u n it .
Th e floa t is posit ion ed t o plu g t h e open in g (6)
bet ween t h e oil ga ller y (2) a n d gea r set ch a m ber (1) so
t h a t t h e r ot a t in g gea r set s do n ot spla sh a bou t in oil
a s t h e oil level r ises. Th e oil level con t r ol r edu ces
power loss a n d pr even t s oil fr om bein g t h r own ou t of
t h e t r a n sm ission h ou sin g a t h igh oil t em per a t u r es.
AUTOMA TIC TRANSMISSION NAG1 - SERVICE INFORMA TION 21 - 131
OPERA TION
Fig. 148 Fluid Level Control
1 - GEARSET CHAMBER
2 - OIL GALLERY
3 - SHELL OF ELECTROHYDRAULIC UNIT
4 - ELECTROHYDRAULIC UNIT
5 - FLOAT
6 - OPENING
Wit h low oil levels, t h e lu br ica t in g oil wh ich flows
con st a n t ly ou t of t h e gea r set , flows ba ck t o oil ga ller y
(2) t h ou gh t h e open in g (6). (F ig. 148) If t h e oil level
r ises, t h e oil pr esses t h e floa t (5) a ga in st t h e h ou sin g
open in g (6). Th e floa t (5) t h er efor e sepa r a t es t h e oil
ga ller y (2) fr om t h e gea r set ch a m ber (1). Th e lu br i-
ca t in g oil wh ich con t in u es t o flow ou t of t h e gea r set s
is t h r own a ga in st t h e h ou sin g wa ll, in cor por a t ed by
t h e r ot a t in g pa r t s a n d flows ba ck in t o t h e oil ga ller y
(2) t h r ou gh t h e u pper open in g (a r r ow).
DI AGN OSI S AN D T EST I N G
EFFECTS OF INCORRECT FLUID LEVEL
A low flu id level a llows t h e pu m p t o t a ke in a ir
a lon g wit h t h e flu id. Air in t h e flu id will ca u se flu id
pr essu r es t o be low a n d develop slower t h a n n or m a l.
If t h e t r a n sm ission is over filled, t h e gea r s ch u r n t h e
flu id in t o foa m . Th is a er a t es t h e flu id a n d ca u sin g
t h e sa m e con dit ion s occu r r in g wit h a low level. In
eit h er ca se, a ir bu bbles ca u se flu id over h ea t in g, oxi-
da t ion , a n d va r n ish bu ildu p wh ich in t er fer es wit h
va lve a n d clu t ch oper a t ion . F oa m in g a lso ca u ses flu id
expa n sion wh ich ca n r esu lt in flu id over flow fr om t h e
t r a n sm ission ven t or fill t u be. F lu id over flow ca n ea s-
ily be m ist a ken for a lea k if in spect ion is n ot ca r efu l.