POWERSTEERING GEARANDLINKAGE (ModelPR24AC)
Assembly (Cont'd)
14. Ensure thattherack iscentered. Installrearcover capso
that itsprotrusion ispositioned asshown infigure.
Be careful nottodamage wormringandoilseal.
88T507C
15.Install diaphragm springintogear housing.
• Always installretainer, springwasher anddiaphragm
spring inthat order.
• Make sureconvex end(painted white)ofdiaphragm spring
faces outward wheninstalling.
16. Install retainer springandadjusting screwtemporarily.
88T0878
17.Install newlockplate.
a. Attach lockplate
@
toside rodinner socket
(!).
b. Insert steering gearspacer
CID
torack
@.
c. Apply locking sealant toinner socket threads
CID.
Screw innersocket intorack
@
and tighten tospecified
torque.
d. Stake lockplate attwo places.
CAUTION:
To prevent scratching theboot, remove burrsfromlockplate.
18. Tighten outersocket locknut.
Tie-rod length
"L":
Refer toSOS (ST-35).
88T0938
19.Measure rackstroke.
Rack stroke
"5":
Refer to50S (ST-35).
s
88T0868A ST-26
POWERSTEERING GEARANDLINKAGE (ModelPR24AC)
Assembly (Cont'd)
20. Before installing boot,coatthecontact surfaces between
boot andtie-rod withgrease.
88T967A
21.Install bootclamps.
• Toinstall, wrapbootclamp around bootgroove twice.To
tighten clamp,placeascrewdriver throughbothrings. Twist
rings 4to 4-1/2 turns while pulling withaforce ofapprox. 98
N (10 kg,22Ib).
• Twist bootclamp inthe direction showninfigure atleft.
88T440A
•Locate twisted endofboot clamp inthe range shown. (This
will prevent interference withother parts.)
88TS09C
88T1268
•
After twisting bootclamp, bendtwisted anddiagonally soit •
does notcontact boot.
Adjusting screw
88T0898Adjustment
Adjust pinionrotating torqueasfollows:
1. Set rack tothe neutral position withoutfluidinthe gear.
2. Coat theadjusting screwwithlocking sealant andscrew it
in.
3. Lightly tighten locknut.
4. Tighten adjusting screwtoatorque of4.9 to5.9 N'm (50to
60 kg-em, 43to52 in-Ib).
5. Loosen adjusting screw,thenretighten itto 0.2 N'm (2
kg-em, 1.7in-Ib).
ST-27
POWERSTEERING GEARANDLINKAGE (ModelPR24AC)
Adjustment (Cont'd)
6. Move rackover itsentire stroke several times.
7. Measure pinionrotating torquewithintherange of180° from
neutral position.
Stop thegear atthe point ofmaximum torque.
8. Loosen adjusting screw,thenretighten itto 4.9 N'm (50
kg-em, 43in-Ib).
9. Loosen adjusting screwby70° to110°.
SST072BA
10.Prevent adjusting screwfromturning, andtighten locknut
to specified torque.
SST557A
SST090B
11.
Check racksliding forceonvehicle asfollows:
a. Install steering gearontovehicle, butdonot connect tie-rod
to knuckle arm.
b. Connect allpiping andfillwith steering fluid.
c. Start engine andbleed aircompletely.
d. Disconnect steeringcolumnlowerjointfrom thegear.
e. Keep engine atidle and make suresteering fluidhas
reached normaloperating temperature.
f. Pull tie-rod slowlytomove itfrom neutral position to
:l:
11.5
mm
(:l:
0.453 in)atspeed of3.5 mm (0.138 in)/s.Check that
rack sliding forceiswithin specification.
Average racksliding force:
152.0 -240.3 N(15.5 .24.5 kg,34.2.54.0 Ib)
Maximum forcedeviation:
98 N(10 kg,22Ib)
g. Check sliding forceoutside aboverangeatrack speed of40
mm (1.57 in)/s.
Maximum racksliding force:
294 N(30 kg, 66Ib)
Maximum forcedeviation:
147 N(15 kg, 33Ib)
• Ifrack sliding forceisnot within specification, readjustby
repeating adjustment procedurefromthebeginning.
• If
rack sliding forceisstill outofspecification after
readjustment, gearassembly needstobe replaced.
ST-28
SERVICEDATAANDSPECIFICATIONS (50S)
Inspection andAdjustment (Cont'd)
STEERING GEARANDLINKAGE
CDand
Applied model GA
engine model SRengine
models
Steering geartype R24NPR24AC
Tie-rod outerballjoint
Swinging forceat
6.9-64.7
cotter pinhole: "A"
(0.7-6.6, 1.5-14.6)
N (kg, Ib)
Rotating torque:"B" 0.29
-294
N'm (kg-em, in-Ib) (30
-30.0, 26-260)
Axial endplay: "C"
0.5(0.020) orless
mm (in)
Tie-rod innerballjoint
.
Swinging force":"A" 3.9
-53.0
6.9-569
(0.4 -5.4,
N (kg, Ib)
0.9-11.9) (07
-58,1.5 -12.8)
Axial endplay: "C"
0.4(0.016)
a
(0)
mm (in)
Tie-rod standard length"L"
187(7.36)
mm (in)
". Measuring point
[f:
137 mm (5.39 in)]
SST488C
Retainer adjustment
Adjusting screw
Initial tightening
984.9
-5.9
torque (100,87)(50-60, 43-52)
Nm (kg-em, in-Ib)
Retightening torque
after loosening
-
02
(2,1.7)
N'm (kg-em, in-Ib)
Tightening torque
after gear has
-
49(50, 43)
settled
N'm (kg-em, in-Ib)
Lessthan
60'
[Within
Returning angle play
of0.1
70'-110'
degree mm
(0.004
in)/15 N'm
(1.5 kg-m,
11 ft-Ib)] CD
and
Applied model GAengine model SRengine
models
Steering geartype R24N
PR24AC
Rack stroke "S" mm(in) 70(2.76) 65(2.56)
POWER STEERING
Applied model All
Steering geartype PR24AC
Rack sliding force
N(kg, Ib)
Under normal operating oil
pressure
Range within ~.115 mm
(:1:0.453 in)
from theneutral
position atrack speed of
3.5 mm (0.138 in)/s
Average force 1520
-2403
(15.5 -24.5, 34.2-54.0)
Maximum forcedeviation 98(10, 22)
Except forthe above range
Maximum slidingforce 294(30, 66)
Maximum forcedeviation 147
(15, 33)
Steering wheelturning force
(Measured atone fullturn from the
39(4, 9)or less
neutral position)
N(kg, Ib)
Fluid capacity (Approximate)
0.9(3/4)
f
(Imp qt)
7,649-8,238
Oil pump maximum pressure (76.5
-82.4,
kPa (bar, kg/em?, psi) 78-84,
1,109 -1,194)
•
ST-35
