Land Rover Defender 90 Workshop 2nd Edition Nas Rover Manual

57STEERING
2
OVERHAUL
6.Remove set screw retaining rack pad adjuster.
7.Remove rack adjuster and pad.
8.Remove sector shaft adjuster locknut.
9.Remove four bolts from sector shaft cover.
10.Screw in sector shaft adjuster until cover is
removed.
NOTE: Sealant is applied to hexagon
socket to tamperproof sector shaft
adjuster.
11.Slide out sector shaft.12.Remove piston, a bolt screwed into piston will
assist removal.
13.Remove input shaft dirt excluder.
14.Remove worm adjuster locknut using C wrench...

STEERING
3
OVERHAUL Steering box seals
20.Remove circlip and seal from sector shaft
housing bore.
CAUTION: Do not remove sector shaft
bearings from casing. Replacement parts
are not available. If sector shaft bearings
are worn, fit a new steering box.
21.Remove dirt excluder, circlip and seal from input
shaft housing bore.
CAUTION: The use of a seal puller is
recommended to prevent damage to
casing, and possible oil leaks.INSPECTING
Piston
22.Discard all rubber seals and provide
replacements.
NOTE: A...

57STEERING
4
OVERHAUL Sector shaft assembly
26.Check there is no side play on roller.
27.If side play on roller exists fit a new sector shaft.
28.Check condition of adjuster screw threads.
Check adjuster end float. Fit new adjuster if end
float exceeds 0.15 mm, 0.006 in.
29.Examine bearing areas on shaft for excessive
wear.
30.Examine gear teeth for uneven or excessive
wear.
Sector shaft cover assembly
31.Inspect cover and bearing. If worn or damaged,
fit a new steering box.
Sector shaft adjuster...

STEERING
5
OVERHAUL 37.If required, replace all three rings, using ring
expanderLRT-57-019. The expander will not
pass over rings already fitted. Remove rings to
allow access without damaging seal grooves.
38.Warm rings and expander tool to aid assembly.
Fit rings to expander, slide expander over valve
and worm assembly. In turn fit rings to their
grooves. Remove expander, slide valve and
worm assembly into ring compressor
LRT-57-020and allow to cool.
Ball bearing and cage assemblies
39.Examine ball...

57STEERING
6
OVERHAUL Reassemble
NOTE: When fitting replacement oil seals
lubricate with recommended fluid and
ensure absolute cleanliness.
Sector shaft oil seal
52.Fit oil seal, lip side first.
53.Fit extrusion washer.
54.Fit dust seal, lipped side last.
55.Fit circlip.Fitting valve and worm assembly
56.Refit original shims and inner bearing cup. Use
Petroleum Jelly to aid assembly.
NOTE: If original shims are not used, fit
shims of 0.76 mm, 0.030 in thickness.
57.Fit inner cage and bearings assembly....

STEERING
7
OVERHAUL
62.Loosely screw adjuster into casing.
63.Fit locknut, do not tighten.
64.Turn in worm adjuster until end float is almost
eliminated. Ensure bearing cages are seated
correctly.
65.Measure maximum rolling torque of valve and
worm assembly, using a torque wrench and
spline socketLRT-57-025.
66.Turn in worm adjuster while rotating shaft to
increase figure measured in instruction 65. to
0.56 Nm, 0.41 lbf ft.
67.Back off worm adjuster 1/4 turn. Turn in worm
adjuster to increase reading at...

57STEERING
8
OVERHAUL Fitting rack adjuster
71.Fit rack adjuster and thrust pad to engage rack.
Back off half turn on adjuster.
72.Loosely fit new nylon pad and adjuster set screw
assembly.
Fitting sector shaft cover
73.Fit new sealing ring to cover.
74.Align cover with casing.
75.Screw cover assembly fully on to sector shaft
adjuster screw.76.If necessary back off sector shaft adjuster screw.
Tap cover in place to allow cover to joint fully
with casing.
NOTE: Before tightening fixings, rotate
input...

STEERING
9
OVERHAUL Adjusting sector shaft
NOTE: Refit drop arm and tighten nut
sufficiently to ensure that no backlash
exists between drop arm and sector shaft.
81.To set worm on centre, rotate input shaft to full
inner-lock full right lock for a left hand drive
vehicle, full left lock for a right hand drive
vehicle. Rotate input shaft back towards centre
two full turns.
82.The box is now on centre and can be adjusted.
83.Hold input shaft and rock drop arm to establish
backlash is present. Continue...

57STEERING
10
OVERHAUL Adjustments
91.Note where greatest figures are recorded
relative to steering position. If greatest figures
are not recorded across centre of travel (steering
straight-ahead), adjust as follows:
If torque peak occursbeforecentre position,addto
shim washer value; if torque peak occursaftercentre
position,subtractfrom shim washer value,
refer to
fitting valve and worm assembly
.
Shim washers are available as follows:
0.03mm, 0.07mm, 0.12mm and 0.24mm
0.001in, 0.003in, 0.004in and...

STEERING
1
SPECIFICATIONS, TORQUE TORQUE VALUES
Nm lbf ft
Drag link to drop arm 40........................................................ 30
Ball joint nuts 40.................................................................... 30
Clamp bolt nuts 14................................................................ 10
Steering column bracket nuts 22........................................... 16
Steering wheel nut 50........................................................... 37
Tie bar to mounting nut...