Jeep Cherokee 1999 Electronic Service Manual page 1292

X J
DESCRIPTION AND OPERATION
POWER STEERING GEAR . . . . . . . . . . . . . . . . . 11
DIAGNOSIS AND TESTING
POWER STEERING GEAR LEAKAGE
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
REMOVAL AND INSTALLATION
STEERING GEAR . . . . . . . . . . . . . . . . . . . . . . . . 13
DISASSEMBLY AND ASSEMBLY
HOUSING END PLUG . . . . . . . . . . . . . . . . . . . . 13
PITMAN SHAFT/SEALS/BEARING . . . . . . . . . . . 14
DESCRI PT I ON AN D OPERAT I ON
POWER STEERING GEAR
Th e power st eer in g gea r is a r ecir cu la t in g ba ll t ype
gea r (F ig. 1). Th e gea r a ct s a s a r ollin g t h r ea d
bet ween t h e wor m sh a ft a n d r a ck pist on . Th e wor m
sh a ft is su ppor t ed by a t h r u st bea r in g a t t h e lower
en d a n d a bea r in g a ssem bly a t t h e u pper en d. Wh en
t h e wor m sh a ft is t u r n ed t h e r a ck pist on m oves. Th e
POWER ST EERI N G GEAR
INDEX
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SPOOL VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . 15
RACK PISTON AND WORM SHAFT . . . . . . . . . . 17
ADJUSTMENTS
STEERING GEAR . . . . . . . . . . . . . . . . . . . . . . . . 19
SPECIFICATIONS
POWER STEERING GEAR . . . . . . . . . . . . . . . . . 21
TORQUE CHART . . . . . . . . . . . . . . . . . . . . . . . . 21
SPECIAL TOOLS
POWER STEERING GEAR . . . . . . . . . . . . . . . . . 22
r a ck pist on t eet h m esh wit h t h e pit m a n sh a ft . Tu r n -
in g t h e wor m sh a ft t u r n s t h e pit m a n sh a ft , wh ich
t u r n s t h e st eer in g lin ka ge.
CAUTION: Components attached with a nut and
cotter pin must be torqued to specification. Then if
the slot in the nut does not line up with the cotter
pin hole, tighten nut until it is aligned. Never loosen
the nut to align the cotter pin hole.
STEERING 19 - 11
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