Power Steering Pump Cleaning And Inspection; Power Steering Pump Assembly - Jeep 1979 CJ-5 Technical & Service Manual

POWER STEERING GEAR AND PUMP 2L-41
(13) Remove pump shaft snap ring and remove pres-
sure plate, pump ring, rotor and vanes, and thrust plate
from shaft. ' "' .
(14) Remove end plate O-rings from pump body bore.
Discard O-rings.
(15) Remove pump shaft seal from pump shaft bore
using tool J-8842.
Cleaning aid Inspection
Clean all parts in solvent and dry them using filtered
compressed air.
Inspect the flow control valve and valve bore for pit-
ting, scoring, or wear and inspect the valve spring for
distortion or loss of tension. Insert the valve in the valve
bore and check for free movement. The valve must not
stick or bind. Replace the valve and spring as an assem-
bly only if either part exhibits any of the above condi-
tions. Replace the pump body if the valve bore is
damaged. '
Check the capscrew located in the end of the' flow
control valve. If loose, tighten it but take care to avoid
scratching or scoring the valve surfaces. Minor surface
irregularities can be removed using crocus cloth (only).
N O T E : The flow control valve and spring are serviced
as an assembly only: Do not attempt to disassemble the
flow control valve at any time.
Inspect the pressure plate, pump ring, and thrust
plate surfaces for wear, cracks, scoring, or pitting. Also
check the surfaces for flatness and for being parallel
with the pump ring. Replace any part that is worn or
damaged.
N O T E : A high polish will always be present on the
pressure plate surfaces as a result of normal operating
contact with the rotor. Do not confuse this polish with
wear or scoring.
Inspect the rotor surfaces for pitting, wear, cracks, or
scoring and check all the rotor vanes for free movement
in the rotor slots. The vanes must not stick or bind.
Replace the rotor if damaged or worn and replace the
vanes if scored, worn, cracked, chipped, or if they stick
or bind.
Inspect the pump shaft for nicks, scoring, wear,
cracks, or worn splines. Replace the shaft if it exhibits
any of these conditions.
Inspect the pump body and reservoir for cracks, po-
rosity, or distortion and check the pump body bores and
O-ring counterbores for damage. Replace either part if
any these conditions are noted.
PUMP ASSEMBLY
CAUTION: Do not allow dirt to enter the pump during
assembly. All parts must be clean and lubricated before
installation. Perform all assembly operations on a clean
work surface or a surface covered with clean, lint free
C O U N T E R S U N K
H O L E (FOR U N I O N S E A L )
C O U N T E R S U N K
H O L E (FOR
M O U N T I N G STUD
SEAL)
\
HOUSING
CORE PLUGS
RESERVOIR
// v . A C—RING SEAL
GROOVE
G R O O V E 1
(FOR END P L A T E GROOVE 2
R E T A I N I N G RING) < F O R S E A L >
^ GHOOVE 3
(FOR SEAL)
A 4 2 1 3 2
Fig. 2L-55 Pump
0-iing Sea! Locations
PIN (2)
A R R O W
TOWARDS
REAR
S H A F T
R E T A I N I N G
RING
6 0 1 9 8
Fig. 21-56 Pump
Shaft Assembly Sequence
shop towels only. Install replacement O-rings, seals, and
snap rings only during assembly. Used or worn seals
will cause leaks, noise and rapid wear after assembly.
(1) Lubricate pressure plate, end plate, and all re-
placement O-ring seals with petroleum jelly. Lubricate
all other parts with power steering fluid.
(2) Install one end plate O-ring seal in third (bot-
tom) groove in pump body bore (fig. 2L-55).
(3) Install dowel pins in thrust plate (fig. 2L-56).