Jeep Cherokee 1999 Electronic Service Manual page 1136

X J
REM OVAL AN D I N STALLAT I ON (Cont inue d)
HYDRAULIC TAPPETS
REMOVAL
Fig. 27 Tappet And Rocker Arm Assembly
(1) Discon n ect t h e n ega t ive ba t t er y ca ble.
(2) Disch a r ge t h e
equ ipped. Refer t o Gr ou p 24, H ea t in g a n d Air Con di-
t ion in g for pr ocedu r e.
(3) If equ ipped wit h a ir con dit ion in g, r em ove t h e
A/C lin es a t t h e com pr essor a n d ca p.
(4) Rem ove t h e A/C lin e br a cket a t t a ch ed t o t h e
cylin der h ea d cover a n d m ove t h e lin es a wa y fr om
t h e cylin der h ea d.
(5) Rem ove cylin der h ea d cover. Refer t o cylin der
h ea d cover r em ova l a n d in st a lla t ion pr ocedu r e in t h is
sect ion .
(6) Rem ove t h e r ocker a ssem blies a n d pu sh r ods.
Refer t o r ocker a r m s a n d pu sh r od r em ova l a n d
in st a lla t ion pr ocedu r e in t h is sect ion . Iden t ify pu sh
r ods t o en su r e in st a lla t ion in or igin a l loca t ion .
(7) Rem ove cylin der h ea d, in t a ke m a n ifold, a n d
exh a u st m a n ifold. Refer t o cylin der h ea d r em ova l
a n d in st a lla t ion in t h is sect ion .
(8) Rem ove t h e t a ppet r et a in er s (F ig. 28).
(9) Slide H ydr a u lic Ta ppet Rem over /In st a ller Tool
t h r ou gh open in g in block a n d sea t t ool fir m ly in t h e
h ea d of t a ppet .
(10) P u ll t h e t a ppet ou t of t h e bor e wit h a t wist in g
m ot ion . If a ll t a ppet s a r e t o be r em oved, iden t ify t a p-
pet s t o en su r e in st a lla t ion in or igin a l loca t ion .
a ir con dit ion in g syst em , if
Fig. 28 Tappet And Retainer
CAUTION: The plunger and tappet bodies are not
interchangeable. The plunger and valve must
always be fitted to the original body. It is advisable
to work on one tappet at a time to avoid mixing of
parts. Mixed parts are not compatible. DO NOT dis-
assemble a tappet on a dirty work bench.
INSTALLA TION
(1) Lu br ica t e t h e t a ppet s.
(2) In st a ll t h e t a ppet s a n d r et a in er s in t h eir or igi-
n a l posit ion s. E n su r e t h a t t h e oil feed h ole in t h e
side of t h e t a ppet body fa ces u p (a wa y fr om t h e
cr a n ksh a ft ).
(3) In st a ll t h e cylin der h ea d, in t a ke m a n ifold, a n d
exh a u st m a n ifold. Refer t o cylin der h ea d r em ova l
a n d in st a lla t ion in t h is sect ion .
(4) In st a ll t h e pu sh r ods.
(5) In st a ll t h e r ocker a r m s. Refer t o r ocker a r m s
a n d pu sh r od r em ova l a n d in st a lla t ion in t h is sect ion .
(6) In st a ll t h e cylin der h ea d cover. Refer t o cylin -
der h ea d cover r em ova l a n d in st a lla t ion in t h is sec-
t ion .
(7) Con n ect t h e n ega t ive ba t t er y ca ble.
CAUTION: To prevent damage to valve mechanism,
engine must not be run above fast idle until all
hydraulic tappets have filled with oil and have
become quiet.
(8) St a r t a n d oper a t e en gin e. Wa r m u p t o n or m a l
oper a t in g t em per a t u r e.
ENGINE 9 - 23