Page 697 of 1681

Power Steering Gearbox
Disassembly (cont'd)
25. Using a cutter or an equivalent tool, cut and remove
the four seal rings from the sleeve.
CAUTION: 86 caroful not to damage the edgos of
the 3leeve grooves whon removing the scal rings
and O-ring.
Using I cutter or an equivalent tool, cut the valve
seal ring and O-ring at the groove the pinion shaft.
Remove the valve seal ring and O-ring.
CAUTION: 86 careful not to d.mago the sdges ol
lhe pinion shaft groove whgn removing the valvo
seal ring and O-ring.
SLEEVE
Cutting slot position.
17 -48
t"fRemove the valve oil seal and wave washer ring
from the pinion shaft.
NOTE:
. Inspect the ball besring by rotating the outer
race slowly. lf there is excessive play, replace the
pinion shaft and sleeve as an assembly.
. The pinion shaft and sleeve are a precise fit; do
not intermix old and new pinion shafts and
steeves.
VALVE OII- SEALReplace.
Press the valve oil seal and bushing out of the valve
housing using a hydraulic press and special tool
shown below.
ATTACHMENT, 23 x 25 mm
07NAD - SB3020A
VALVE OIL SEALReplace.
28.
BALL EEARING
BUSHING
Page 698 of 1681
ra
NOTE:
. Clean the disassembled parts with a solvent and dry them with compressed air. Do not dip the rubber parts in a sol-
venr,
. Always replace the O-rings and rubber seals with new ones before assembly,
. Apply recommended power steering fluid to the parts indicated in the assembly procedures.
. Do not allow dust, dirt, or other foreign materials to enter the power steering system.
. Use the appropriate specialtools where necessary.
FLANGE BOLT20 N.m 12.0 kgf.m, 14 lbl.ftl
VALVE HOUSING
CYLINDER LINE B26 N.m 12.7 kgf.m, 20
VALVE OIL SEALReplace.
SLEEVE SEAL RINGSReplace.st"cEvE
VALVE SEALReplace.
WAVE WASHER
VALVC SEAL RINGReplace.
O-RINGReplace.
PINION SHAFT
RACK GUIDE SCREW
LOCKNUT \
cEARBoxHousrNc \b
SPRING
f,ACK GUIDE
BACKUP RING
Replace.
GEAR HOUSINGCYLINDER ENDReplace.
CYLINDER END SEALReplace.O.RINGReplace.
I
o0'
STEERING RACK
PISTON SEAL RINGReplace.
CYLINDER END69 N.m {7.0 kgtm,51 lbtftl
{cont'd}
Page 699 of 1681

Power Steering Gearbox
Reassembly (cont'dl
i
valv6 Body Reasrombly
1. Apply vinyl tape to the stepped portion of the pin-
ion shaft, and coat the surface of the vinyl tspe with
the power steering fluid.
Vinyl tlp€lst.ppcd ponionl
Groov€ side.
Install the wave washer,
Coat the inside surface of the new valve oil seal
with power steering fluid.
Slide the valve oil sesl over the pinion shaft, being
careful not to damage the sealing lip.
CAUTIONT ln3tall the v8lve oil 3eal whh itr groovod
side facing oppositc thc braring.
Fit the new O-ring in the groovo of the pinion shaft.
Then slide the new valve sesl ring over the shaft
and groove in on the pinion shaft.
Remove the vinyl tape from the pinion shaft.
NOTE: Do not over - expand the valve seal ring.
Sr.lino
E
lip
VALVE SEAL RINGReplace.Do not over-expand.
17-50
7. Apply power steering fluid to the surJace of the
valve seal ring that was installed on the pinion
shaft,
Apply power steering fluid to the inside of the spe-
cial tool, Set the larger diameter end of the special
tool over the valve seal ring.
Move the sDecial tool uo and down several times to
make the valve seal ring fit in the pinion shaft.
11.
(w(ffi \
Use the wider diameter Make th6 valve seal ringend of the special snugly fit in the pinion
tool first to make shaft using the other endthe valve seal ring (smaller diameter end) ofIit in the pinion the special tool.shalt.
Remove the special tool,
Turn the special tool over and set the smaller diam-
eter end of the special tool over the valve seal ring,
Move the special tool up and down several times to
make the vslve seal ring snugly fit in the pinion
shaft.
Page 700 of 1681

12.Apply power steering fluid to the surface of the spe-
cial tool. Set the new seal rings over the special tool
from the smaller diameter end of the tool, and
expand the seal rings. Do two rings at a time from
each end of the sleeve.
NOTE:
. Do not over-expand the seal ring. Install the resin
seal rings with care so as not to damage them.
After installation, be sure to contract the seal
rings using the specialtool (sizing tool).
. There are two types of sleeve seal rings: black
and brown. Oo not mix the different types of
sleeve seal rings as they are not compstible.
Align the special toolwith each groove in the sleeve.
and slide a sleeve seal ring into each groove.
NOTE: After installation, compress the seal rings
with your fingers temporarily.
BALL JOINT B(X)? CUP GUIDE07MAG - SLdrlrx,
Apply power steering fluid to the seal rings on the
sleeve and to the entire inside surface of the soecial
tool.
SLEEVE SEAL NINGSIZING TOOL0r9?a - sat02n0
Insert the sleeve into the special tool slowly.
Move the sleeve each direction several times to
make the seal rings snugly fit in the sleeve.
NOTE: Be sure that the seal ringsare notturned up.
13.
14.
to.
17-51
Cutout.
17.Apply power steering fluid to the surface of the pin-
ion shaft, assemble the sleeve over the pinion shaft
by aligning the locating pin on the inside of the
sleeve with the cutout in the shaft. Then install the
new circlip securely in the pinion shaft groove.
NOTE:
. Be careful not to damage the valve seal ring
when inserting the sleeve.
. Install the circlip with its radiused side facing in,
18. Installthe circlip securely in the pinion shaft groove.
Apply power steering fluid to the seal ring lip of the
valve oil seal. Then install the seal in the valve
housing using a hydraulic press and special tools as
snown.
CAUnON: Instsll tho valvo oil s€.| with its groovcs
side facing th. tool.
19.
ATTACHMET{T,32x35mm077i15 - (xll01lX,
VALVE OIL SEALReplace.Make sure thespring in theoilseal.
(cont'd)
Page 701 of 1681
Power Steering Gearbox
Reassembly (cont'dl
20. Press the bushing into the valve housing using a
hydraulic press and speciai tool as shown.
DRIVER07749 - U)l 0000
ATTACHMENT,32x35mmPress
I07746 - fi)l01(x)
sUSHING
21.Apply vinyl tape to the pinion shaft, then coat the
vinyl tape with power steering fluid.
I
i
I
VALVE OIL SEALReplace.
VALVE HOUSING
Vinyltape
PINION
E
SITEVE SEAL RINGSReplace.8e sure that theseal rings are notturned up, theninstall.
Insert the pinion shaft into the valve housing.
CAUTION: Be careful not to damage the valve seal
rings.
Remove the vinyl tape from the pinion shaft.
Seding lip lrce.
17-52
24. Press the pi.ion shafvsleeve into the valve housing
using a hydraulic press as shown.
NOTE: Check that the pinion shaft/sleeve turns
smoothly by turning the pinion shaft with your
hand.
Page 702 of 1681

Strsring Rack Roarssmbly
25. Coat the special tool with power steering fluid, and
slide it onto the rack, big end first.
26. Position the new O-ring and new piston seal ring on
the special tool, then slide them down towards big
end of the tool.
NOTE:
. Do not over expand resin seal rings. Install the
resin seal ring with care so as not to damage
them. After installation. be sure to contract the
seal ring using the specialtool (sizing tool).
. Replace piston's O-ring and sesl ring as a set.
27. Pull the O-ring off into the piston groove, then pull
the piston seal ring off into the piston groove on top
of the O-ring as shown.
Coat the piston seal ring and inside of the special
tool with power steering fluid.
Carefullv slide the tool onto the rack and over the
piston seal ring.
30. Move the special tool back and forth several times
to make the piston seal ring fit snugly in the piston.
28.
29.
PISTON
Replace.
31.Coat the sliding surface of the special tool and new
cylinder end seal with power steering fluid,
Place the seal on the special tool with its grooved
side facing opposite the special tool.
Grooved side.
CYLINOER END SEALReplace. 0797,t - 68D8OA
Apply a thin coat of grease to the inside of the spe-
cial tool, and install it on the steering rack.
CAUTION: Make sure the rack tecth do not lace
the 3lot in the special tool.
CYLINDER END SEALReplace.
CYLINDERSEAL SLIDER07974 - 6890800ot(cont'd)07974 - 6A1080A
17-5 3
Page 703 of 1681

Power Steering Gearbox
Reassembly {cont'd}
34. Separate the cylinder end seal from the special tool,
then remove the tool from the steerino rack.
CYLINDER END SEALReplace.
lnstall the backup ring on the steering rack. then
place the cylinder end seal to piston.
Grease the steering rack teeth, then insert the steer-
ing rack into the gearbox housing.
CAUTION: Be carelul not to damage to inner sur-
tace of the gearbox housing with the rack edges.
BACKUP BING
CYLINDER END SEAL
17-54
37.
38.
Set the gearbox in a press with the cylinder housing
facing upward.
Install the flange bolt into the end of the steering
rack until it bottoms in the hole. then back the
tlange bolt out 1/4 turn. Hold the flange bolt and
tighten the flange nut against the rack by hand.
Install the cylinder end seal into the bottom of the
cylinder by pressing on the bolt with a press as
shown.
CAUTION: Do not push on th€ boh with excossive
lorce; as it may damage thecylinder end seal.
Press
I
12 x 170 mm FLANGE BOLT
12 mm FLANGE NUT
Wrap vinyl tape around the rack end edges, and
coat the surface of the tape with the power steering
flu id.
NOTE: Make sure that the vinyl tape is wrapped care-
fully so that there is no stepped ponion.
Coat the inside surface of the new cvlinder end seal
with power steering fluid.
Install the cylinder end seal onto the steering rack
with its grooved side toward the piston.
CAUTION: When installing the cylinder end seal,
be careful not to damage the sealing lip face of the
seal with the edges of the steering rack,
Stak6d oosition.
39.
41.
Make sure the springis in the cylinder end
Page 704 of 1681

Remove the vinyl tape from the steering rack, then
push in the cylinder end seal with your finger.
NOTE:
. Remove any resideue of tape adhesive.
. Take care not to damage the cylinder end seal
with the threads and burrs at the staked position
of the gearbox.
Install a puller yoke to the steering gearbox, then
clamp the puller yoke in a vise wjth soft jaws as
shown.
PULLER YOKEI{Commcrci.lly .vailablelSn.p-On@ T/N c.r123-1oTc€ T/N 7372or equivalent
Grease the inside surface of the cylinder end. then
install the cylinder end by screwing it into the cylin
der,
After tightening the cylinder end, stake the point of
the cylinder housing shown below.
NOTE: Stake in the cylinder in the position opposite
from where the stake was removed during disas-
semory.
Stake point. Dopth: 1.0 mm (0.04 inl
4.0 mm (0.16 inl
CYLINOER END
46.
\
47.
49.
coat the new o-ring with grease and install it in the
groove in the gearbox housing.
Apply grease to the needle bearing in the gearbox
ho using.
Install the valve body unit on the gearbox housing
by engaging the gears. Tighten the flange bolts to
the specified torque.
NOTE: Note the valve body unit installation posi-
tion (direction of pipe connection).
VALVE BODY UNIT
(cont'd)
O.RINGReplace.
-611
NEEDLE AEARING
-Grl
17-55