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STEERING
19-1 7
HOUSIGG
HEAD
N Y 1245A
&'
Fig. 1 1-Removing
the Reaction Seal from
the Worm Shaft Support
NOTE: To reinstall rollers, retain the rollers in the
cage with wheel bearing lubricant.
CAUTION: If the wormshaft oil seal is to be re-
placed, perform the operation with the housing
head assembled in the steering gear housing.
(13) Remove the large "0" ring from the groove in
the housing head.
(14) Remove the reaction seal from the groove in
the face of the housing head with air pressure directed
into the ferrule chamber (Fig. 11).
(15) Inspect all grooves for burrs. Make sure the
passage from the ferrule chamber
to
the upper reac-
tion chamber is unobstructed.
(16) Remove the reaction spring, reaction ring,
worm balancing ring and spacer.
(17) Hold the wormshaft from turning, then turn
the nut with sufficient force to release the staked por-
tions from the knurled section and remove the nut.
NOTE: Wire brush the knurled section to remove
/
REACTION "0" RING
'
FERRULE
KR
46
Fig. 12-Removing
the Reaction Ring from
the Cylinder Head
F E R R U L E
, e
1
WORM SLEEVE
F E R R U L E "0" RING
( 3 ,
KR47A
ACTION
"0'
RING
1
RETAINER
Fig. 13-Removing
the Cylinder Head Oil Seal
the chips, then blow out the nut and wormshaft
remove any metal particles.
to
(18) Remove the upper thrust bearing race (thin)
(19) Remove the center bearing race.
(20) Remove the lower thrust bearing and lower
(21) Remove the lower reaction ring and reaction
(22) Remove the cylinder head assembly.
(23) Remove the two "0" rings in the two outer
grooves in the cylinder head.
(24) Remove the reaction "0" ring from the
groove in the face of the cylinder head with air pres-
sure directed into the oil hole located between the two
"0" ring grooves (Fig. 12).
(25) Remove the snap ring, sleeve and rectangular
oil seal ring from the cylinder head counterbore (Fig.
13). Inspect the seal for possible damage and
re-
place the seal
if
necessary.
(26) Test the operation of the wormshaft. The
torque required to rotate the wormshaft throughout
its travel in or out of the piston must not exceed
2
inch-pounds with a
10
pound side load. The worm
should run in and out of the piston under its own
weight.
NOTE: The worm and piston is serviced as a com-
plete assembly and should not
be disassembled.
There must be
no
perceptible side play of the worm.
(27) Inspect the condition of the rubber sealing
ring located under the cast iron ring and replace it if
necessary. Install the cast iron piston ring as follows:
(a) Slide a new piston ring into place in the piston
groove, then place the piston and ring assembly in
Tool C-3676 with the lower part of the piston and ring
resting on the land of the Tool (Fig. 14).
(b) Press down on the piston to seat the ring in the
and upper thrust bearing.
thrust bearing race (thick).
spring.
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