Dodge Sprinter 2006 Manual page 801

VA
NOTE: The pressure gauge, connected at the ALB
controller must indicate the outlet pressure which
is assigned on the ALB plate to the rear axle load
determined.
NOTE: If the rear axle load determined is between
two figures indicated on the ALB plate, the outlet
pressure should be determined accordingly.
(8) If t h e pr essu r e m ea su r ed differ s fr om t h e spec-
ifica t ion , a dju st t h e ALB con t r oller (F ig. 16).
(9) Loosen t h e br a ke peda l win ch .
(10) Adju st t h e ou t let pr essu r e by t u r n in g t h e
a dju st in g n u t (F ig. 16) To in c re a s e p re s s u re -
tig h te n th e a d ju s tin g n u t. To re d u c e p re s s u re -
lo o s e n th e a d ju s tin g n u t.
(11) Aft er a dju st m en t r ein st a ll t h e br a ke peda l
win ch a n d r ech eck t h e pr essu r es a n d r ea dju st if
n eeded.
(12) Tigh t en t h e lock a dju st in g n u t .
Fig. 16 ALB CONTROLLER ADJUSTER NUT
1 - ALB ADJUSTER NUT
2 - SPRING
M AST ER CY LI N DER
DIAGNOSIS AND TESTING - MASTER CYLIN-
DER / POWER BOOSTER
(1) St a r t en gin e a n d ch eck boost er va cu u m h ose
con n ect ion s. A h issin g n oise in dica t es va cu u m lea k.
Cor r ect a n y va cu u m lea k befor e pr oceedin g.
(2) St op en gin e a n d sh ift t r a n sm ission in t o Neu -
t r a l.
(3) P u m p br a ke peda l u n t il a ll va cu u m r eser ve in
boost er is deplet ed.
(4) P r ess a n d h old br a ke peda l u n der ligh t foot
pr essu r e. Th e peda l sh ou ld h old fir m , if t h e peda l
fa lls a wa y m a st er cylin der is fa u lt y (in t er n a l lea k-
a ge).
(5) St a r t en gin e a n d n ot e peda l a ct ion . It sh ou ld
fa ll a wa y sligh t ly u n der ligh t foot pr essu r e t h en h old
fir m . If n o peda l a ct ion is discer n ible, power boost er,
va cu u m su pply, or va cu u m ch eck va lve is fa u lt y. P r o-
ceed t o t h e P OWE R BOOSTE R VACUUM TE ST.
(6) If t h e P OWE R BOOSTE R VACUUM TE ST
pa sses, r ebu ild boost er va cu u m r eser ve a s follows:
Relea se br a ke peda l. In cr ea se en gin e speed t o 1500
r pm , close t h e t h r ot t le a n d im m edia t ely t u r n off ign i-
t ion t o st op en gin e.
(7) Wa it a m in im u m of 90 secon ds a n d t r y br a ke
a ct ion a ga in . Boost er sh ou ld pr ovide t wo or m or e va c-
u u m a ssist ed peda l a pplica t ion s. If va cu u m a ssist is
n ot pr ovided, boost er is fa u lt y.
POWER BOOSTER VACUUM TEST
(1) Con n ect va cu u m ga u ge t o boost er ch eck va lve
wit h sh or t len gt h of h ose a n d T-fit t in g (F ig. 17).
(2) St a r t a n d r u n en gin e a t cu r b idle speed for on e
m in u t e.
(3) Obser ve t h e va cu u m su pply. If va cu u m su pply
is n ot a dequ a t e, r epa ir va cu u m su pply.
(4) Cla m p h ose sh u t bet ween va cu u m sou r ce a n d
ch eck va lve.
(5) St op en gin e a n d obser ve va cu u m ga u ge.
(6) If va cu u m dr ops m or e t h a n on e in ch H G (33
m illiba r s) wit h in 15 secon ds, boost er dia ph r a gm or
ch eck va lve is fa u lt y.
Fig. 17 Typical Booster Vacuum Test Connections
1 - TEE FITTING
2 - SHORT CONNECTING HOSE
3 - CHECK VALVE
4 - CHECK VALVE HOSE
5 - CLAMP TOOL
6 - INTAKE MANIFOLD
7 - VACUUM GAUGE
POWER BOOSTER CHECK VALVE TEST
(1) Discon n ect va cu u m h ose fr om ch eck va lve.
(2) Rem ove ch eck va lve a n d va lve sea l fr om
boost er.
BRAKES - BASE 5 - 17