Jeep Cherokee 1999 Electronic Service Manual page 1202

X J
SERV I CE PROCEDU RES (Cont inue d)
h igh er fu el pr essu r es a n d t h e possibilit y of con t a m i-
n a t ed fu el in t h is syst em . If it is n ecessa r y t o r epla ce
t h ese lin es/t u bes/h oses, on ly t h ose m a r ked E F M/E F I
m a y be u sed.
If e qu ip p e d : Th e h ose cla m ps u sed t o secu r e r u b-
ber h oses on fu el in ject ed veh icles a r e of a specia l
r olled edge con st r u ct ion . Th is con st r u ct ion is u sed t o
pr even t t h e edge of t h e cla m p fr om cu t t in g in t o t h e
h ose. On ly t h ese r olled edge t ype cla m ps m a y be
u sed in t h is syst em . All ot h er t ypes of cla m ps m a y
cu t in t o t h e h oses a n d ca u se h igh -pr essu r e fu el lea ks.
Use n ew or igin a l equ ipm en t t ype h ose cla m ps.
Tigh t en h ose cla m ps t o 3 N·m (25 in . lbs.) t or qu e.
QUICK-CONNECT FITTINGS
Also r efer t o F u el Tu bes/Lin es/H oses a n d Cla m ps.
Differ en t t ypes of qu ick-con n ect fit t in gs a r e u sed t o
a t t a ch va r iou s fu el syst em com pon en t s, lin es a n d
t u bes. Th ese a r e: a sin gle-t a b t ype, a t wo-t a b t ype or
a pla st ic r et a in er r in g t ype. Sa fet y la t ch clips a r e
u sed on cer t a in com pon en t s/lin es. Cer t a in fit t in gs
m a y r equ ir e u se of a specia l t ool for discon n ect ion .
DISCONNECTING
WARNING: THE FUEL SYSTEM IS UNDER A CON-
STANT PRESSURE (EVEN WITH ENGINE OFF).
BEFORE SERVICING ANY FUEL SYSTEM HOSE,
FITTING OR LINE, FUEL SYSTEM PRESSURE MUST
BE RELEASED. REFER TO FUEL SYSTEM PRES-
SURE RELEASE PROCEDURE.
CAUTION: The interior components (o-rings, spac-
ers) of some types of quick-connect fitting are not
serviced separately. If service parts are not avail-
able, do not attempt to repair a damaged fitting or
fuel line. If repair is necessary, replace complete
fuel line assembly.
(1) P er for m fu el pr essu r e r elea se pr ocedu r e. Refer
t o F u el P r essu r e Relea se P r ocedu r e in t h is gr ou p.
(2) Discon n ect n ega t ive ba t t er y ca ble fr om ba t t er y.
(3) Clea n fit t in g of a n y for eign m a t er ia l befor e dis-
a ssem bly.
(4) S in g le -Ta b Ty p e F ittin g : Th is t ype of fit t in g
is equ ipped wit h a sin gle pu ll t a b (F ig. 13). Th e t a b
is r em ova ble. Aft er t a b is r em oved, qu ick-con n ect fit -
t in g ca n be sepa r a t ed fr om fu el syst em com pon en t .
(a ) P r ess r elea se t a b on side of fit t in g t o r elea se
pu ll t a b (F ig. 14). If re le a s e ta b is n o t p re s s e d
p rio r to re le a s in g p u ll ta b, p u ll ta b w ill be
d a m a g e d .
(b) Wh ile pr essin g r elea se t a b on side of fit t in g,
u se scr ewdr iver t o pr y u p pu ll t a b (F ig. 14).
(c) Ra ise pu ll t a b u n t il it sepa r a t es fr om qu ick-
con n ect fit t in g (F ig. 15).
(5) Tw o -Ta b Ty p e F ittin g : Th is t ype of fit t in g is
equ ipped wit h t a bs loca t ed on bot h sides of fit t in g
(F ig. 16). Th e t a bs a r e su pplied for discon n ect in g
qu ick-con n ect fit t in g fr om com pon en t bein g ser viced.
Fig. 13 Single-Tab Type Fitting
Fig. 14 Disconnecting Single-Tab Type Fitting
(a ) To discon n ect qu ick-con n ect fit t in g, squ eeze
pla st ic r et a in er t a bs (F ig. 16) a ga in st sides of
qu ick-con n ect fit t in g wit h you r fin ger s. Tool u se is
n ot r equ ir ed for r em ova l a n d m a y da m a ge pla st ic
r et a in er.
(b) P u ll fit t in g fr om fu el syst em com pon en t
bein g ser viced.
(c) Th e pla st ic r et a in er will r em a in on com po-
n en t bein g ser viced a ft er fit t in g is discon n ect ed.
Th e o-r in gs a n d spa cer will r em a in in qu ick-con -
n ect fit t in g con n ect or body.
(6) P la s tic Re ta in e r Rin g Ty p e F ittin g : Th is
t ype of fit t in g ca n be iden t ified by t h e u se of a fu ll-
r ou n d pla st ic r et a in er r in g (F ig. 17) u su a lly bla ck in
color.
(a ) To r elea se fu el syst em com pon en t fr om qu ick-
con n ect fit t in g, fir m ly pu sh fit t in g t owa r ds com po-
FUEL SYSTEM 14 - 11