Dodge Sprinter 2006 Manual page 2041

VA
Fig. 1 A/C Compressor Clutch
1 - BOLT
2 - CLUTCH PLATE
3 - PULLEY AND BEARING
4 - FIELD COIL
5 - SNAP RING
6 - SNAP RING
7 - SHIM (2)
OPERA TION
Th e com pr essor clu t ch com pon en t s pr ovide t h e
m ea n s t o en ga ge a n d disen ga ge t h e com pr essor fr om
t h e en gin e ser pen t in e a ccessor y dr ive belt . Wh en t h e
clu t ch coil is en er gized, it m a gn et ica lly dr a ws t h e
clu t ch in t o con t a ct wit h t h e pu lley a n d dr ives t h e
com pr essor sh a ft . Wh en t h e coil is n ot en er gized, t h e
pu lley fr eewh eels on t h e clu t ch h u b bea r in g, wh ich is
pa r t of t h e pu lley.
Th e com pr essor clu t ch en ga gem en t is con t r olled by
sever a l com pon en t s:
• A/C swit ch on t h e A/C-h ea t er con t r ol pa n el
• E va por a t or t em per a t u r e sen sor
• A/C pr essu r e t r a n sdu cer
• Air t em per a t u r e sen sor
• CAN bu s m essa ges
Th e com pr essor clu t ch is de-en er gized u n der a n y of
t h e followin g con dit ion s:
• Blocked com pr essor (t h er m a l fu se in t h e pu lley)
• Low pr essu r e in t h e syst em
• Low eva por a t or t em per a t u r e
• H a r d a cceler a t ion (WOT)
• H igh coola n t t em per a t u r es
STAN DARD PROCEDU RE
A / C COMPRESSOR CLUTCH AIR GAP
If a n ew clu t ch pla t e a n d/or clu t ch pu lley a r e bein g
u sed, t h e a ir ga p bet ween t h e clu t ch pla t e a n d clu t ch
pu lley m u st be ch ecked u sin g t h e followin g pr oce-
du r e:
(1) Usin g feeler ga u ges, m ea su r e t h e a ir ga p
bet ween t h e clu t ch pla t e a n d t h e clu t ch pu lley fr ic-
t ion su r fa ces.
(2) If t h e a ir ga p is n ot bet ween specifica t ion s
(Refer t o 24 - H E ATING & AIR CONDITIONING -
SP E CIF ICATIONS), a dd or su bt r a ct sh im s u n t il t h e
desir ed a ir ga p is obt a in ed.
NOTE: The shims may compress after tightening
the compressor shaft bolt. Check the air gap in four
or more places on the clutch plate to verify that the
air gap is still correct. Spin the clutch pulley before
making the final air gap check.
A / C COMPRESSOR CLUTCH BREAK - IN
Aft er a n ew com pr essor clu t ch h a s been in st a lled,
cycle t h e com pr essor clu t ch a ppr oxim a t ely t wen t y
t im es (five secon ds on , t h en five secon ds off). Du r in g
t h is pr ocedu r e, set t h e h ea t er-A/C con t r ol in t h e
Recir cu la t ion Mode, t h e A/C bu t t on in t h e on posi-
t ion , t h e blower m ot or swit ch in t h e h igh est speed
posit ion , a n d t h e en gin e speed a t 1500 t o 2000 r pm .
Th is pr ocedu r e (bu r n ish in g) will sea t t h e opposin g
fr ict ion su r fa ces a n d pr ovide a h igh er com pr essor
clu t ch t or qu e ca pa bilit y.
REMOVAL
Th e r efr iger a n t syst em ca n r em a in fu lly-ch a r ged
du r in g com pr essor clu t ch , pu lley, or coil r epla cem en t .
Th e com pr essor clu t ch ca n be ser viced in t h e veh icle.
(1) Discon n ect a n d isola t e t h e ba t t er y n ega t ive
ca ble.
(2) Rem ove t h e ser pen t in e dr ive belt (Refer t o 7 -
COOLING/ACCE SSORY DRIVE /DRIVE
RE MOVAL).
(3) Discon n ect t h e en gin e wir e h a r n ess con n ect or
for t h e com pr essor clu t ch coil fr om t h e clu t ch coil
wir e h a r n ess con n ect or on t h e t op of t h e com pr essor.
(4) Rem ove t h e r et a in er secu r in g t h e com pr essor
clu t ch coil lea d on t h e t op of t h e com pr essor.
(5) Rem ove t h e bolt t h a t secu r es t h e com pr essor
clu t ch t o t h e com pr essor sh a ft (F ig. 2). If n ecessa r y, a
ba n d-t ype oil filt er wr en ch or st r a p wr en ch ca n be
pla ced a r ou n d t h e clu t ch pla t e t o a id in bolt
r em ova l.
CONTROLS-FRONT 24 - 9
BE LTS -