Workshop
Manual
Rolls Royce Silver
Shadow
h
Bentley
T
Ser~es
Chapter
IY
Steering box-To assemble
1. Position the steering box housing in a protected
vice with the adjuster plug end facing upwards.
2. Lubricate the worm shaft, lower thrust bearing,
and races with the approved power steering fluid then
position the thrust bearing and races on the worm
shaft.
3.
Align
the valve body drive pin on the worm shaft
with the narrow pin slot on the valve body. Ensure
that the
'0'
ring seal is fitted between the valve body
and the worm head.
4. Position the valve assembly and worm shaft in
the housing as an integral unit.
Note Do not push against the stub shaft as
this may cause the stub shaft and cap to
pull out the valve body, allowing the
spool seal to slip into the valve body
fluid grooves.
The valve assembly can
be
installed by pushing on the outer
diameter of the valve body housing with
the fingers of both hands. Ensure that
the white plastic rings are not binding on
the inside of the housing.
The valve
assembly is correctly seated when the
fluid return in the housing is fully visible.
5. Place the adjuster plug seal protector (RH 7782)
over the end of the stub shaft.
FIG.
N36
INSTALLING RACK-PISTON SEAL
COMPRESSOR
1
Seal compressor
2
Rack-piston arbor
6.
Fit the adjuster plug assembly over the end of the
stub shaft (see
Fig.
N35).
and tighten just sufficiently
to make certain that all parts are correctly seated in
the housing. Remove the seal protector (RH 7782).
Note If the seal protector
(RH 7782) is re-
moved too soon, the stub shaft seal will
be damaged by the shaft splines.
7. Fit the adjuster plug lock-nut loosely on the
adjuster plug.
Note Do not adjust the thrust bearing pre-
load at this time.
8.
Insert rack-piston seal compressor (RH 7785) into
the steering box housing (see
Fig.
N36),
holding it
tightly against the shoulder in the housing.
9.
Insert the rack-piston into the housing until the
arbor engages with the worm. Turn the stub shaft
clockwise using a
2
in. (19,05
mm.)
socket or box span-
0
ner to draw the rack-piston into the housing.
When
the piston ring is in the housing piston bore the rack-
piston arbor (RH 7787) and the seal compressor
(RH 7785) can be removed.
10. Turn the stub shaft as necessary until the middle
rack groove in the rack-piston is aligned with the
centre of the rocking shaft needle bearing.
Lubricate
the new side cover
'0'
ring seal and fit it into the groove
in the face of the side cover.
11. Secure the rocking shaft cover to the rocking
shaft by screwing the cover to rocking shaft adjuster
screw until the rocking shaft cover bottoms on the
rocking shaft, then back off
)
a turn.
12. Install the rocking shaft so that the centre tooth
in the sector meshes with the centre groove of the
rack-piston.
Ensure that the rocking shaft cover
'0'
ring is in place before pushing the side cover down on
the steering box housing.
0
13. Fit the rocking shaft cover screws and lock
washers and torque tighten to
30
lb. ft. (4,148 kg.m.).
Hold the adjuster screw with an Allen key and fit the
adjuster lock-nut halfway on to the adjuster screw.
14. Insert the rack-piston end plug into the rack-
piston.
15. Torque tighten the end plug to 50 lb. ft.
(6,91
kg.m.).
16. Lubricate the new end plug
'0'
ring seal and
insert it into the groove in the end plug.
17. Insert the end plug into the steering box housing
and seat it against the
'0'
ring seal. Light tapping
with a mallet may be necessary to seat the end plug
correctly.
18. Snap the
aid
plug retainer ring into place by
hand. Light tapping may be required to bottom the
retainer ring securely in the steering box housing.
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