1999 HONDA CIVIC pan

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4. lnsert the driveshaft into the outboard joint until the
stop ring is close on the ioint.
DRIVESHAFT
To completely seat the outboard joint, pick up the
driveshaft and joint, and drop them from about 10
cm (4 to 5 inches) onto a hard surface. Do not use a
hammer as excessive force may damage the drive-
shaft.
16-15
J
6. Check the alignment of the paint mark with the out-
board joint end.
Pack the outboard joint with the joint grease includsd
in th€ new ioint boot set.
Gleaso quanlity
U.S., canada, and Brazil'Ploducod:
115 - 135 g {4.0 - 4.8 oz}
Japan-Producod:
161X, DOHC VTEC angino:
Rubbor boot: 90 - 100 g 13.2 - 3.5 oz)
TPE boot: 1tl6 - 115 I {3'7 - tl'l oz}
Excapt 1000 DOHC VTEC engine:
Rubbel boot: 70 - 80 g l.2.5 - 2.8 ozl
TPE boot: 95 - 105 g {3.4- 3.7 oz}
7.
DRIVESHAFT
(cont'd)

System Description
Steering Pump (cont'dl
The flow control valve and sub-valve in the pump per-
forms the following steps @ through @ to control the
flow of fluid, that is to increase the discharge volume
when engine speed is low, and to decrease it when the
engine speed increases. The assistance thrust of the
steering gearbox changes in compliance with the
change in the discharge volume.
When the engine starts, fluid discharged from the
discharge port starts to flow through oil passage A,
the fixed orifice and the variable orifice to the steer-
ing gearbox. When the engine speed is extremely
low, the return port is closed by the flow control
Fluid pressure discharged from the discharge port
is applied to the top of the sub-valve, and the fluid
pressure that passed through oil passage A is applied
to the bottom of the sub-valve. When this happens,
the pressure difference between the ends of oil pas-
sage A, which is caused by the resistance oil passage
A when the fluid flows through the passage. is
applied to the sub-valve, However, the pressure dif-
ference applied to the sub-valve. that is the force
that pushes the sub-valve down, is too small to
overcome the spring force, and the variable orifice is
fully open when the engine speed is extremely low.
Because the fluid volume flowing through the fixed
orifice and variable orifice increases, a pressure dif-
terence is created between the ends of these ori-
fices, and it increases in proportion to the engine
speed. As the fluid pressure that passed the fixed
orifice and variable orifice is directed to the bottom
of the flow control valve. a pressure difference is
created between the top and bottom of the valve,
which pushes down the flow control valve and
opens the return port. As a result, pan of the fluid
discharged from the discharge port feturns to the
pump suction port, keeping the discharge volume
constant.
In this condition, the sub-valve does not move. and
the variable orifice stays fully open.
lo
trrtrrlo3
J
o
PUMP R.P.M.
To STEERING GEARBOXSUB.VALVE
To STEEnING GEARBOX
FLOW CURVE
!rs+/f/ffih\
o,,-i^"l^tKzYt)91y ul3Yl
FLOW CONTNOL VALVE
su8-vALvE
ORIFICE
ToP
17-18
FLOW CONTROL VALVE

t
To STEERING GEARBOX
To STEERING GEAREOx
@ The fluid volume that flows thorough oil passage A
and the pressure djfference applied to the sub-valve
increase in proportion to the engine speed. The
sub-valve lowers overcoming the spring force, and
it stans to close the variable orifice to regulate the
discharge volume, When this happens, the fluid vol-
ume flowing to the steering gearbox decreases as
the engine speed increases. At the same time, the
flow control valve continues to control the fluid vol-
ume to the return Port,
@ As the engine speed increases funher, the pressure
difference at the sub-valve increases further as well.
The sub-valve then closes the variable orifice com-
pletely, regulating the discharge volume further.
When this happens, the fluid volume discharged
from the pump to the steering gearbox is regulated
and maintained at a given level until the engine
speed reaches the high speed range The flow con-
trol valve functions continues to control the fluid
volume to the return Port.
Pressure Relief
Pressure at the discharge side of the fixed orifice is
directed to the bottom of the flow control valve. When
the pressure builds up, the relief valve in the flow con-
trol valve opens to release the pressure at the bottom of
the valve. This allows the flow control valve to be
pushed back by the pressure difference, and the fluid
volume to the pump return port increases.
As explained above. the system keeps the pump dis-
charge pressure (relief pressure) from exceeding the
given level by controlling the volume of the fluid to the
pump relurn pon,
1.,DAMPING ORIFICE{Docreases excessiv€vibration in the valv6.)
17-19
)
RELIEF VALVE {Opan)
SUB.VALVE
FLOW CONTROL VALVE
/F ft>..\
'-€/K\A/A
o'.'to"5lo'#2"n af11\D7
FLOW CONTROL VALVE

Steering Gearbox
Reassembly (cont'd)
Valve Body Unit Reassembly
1. Apply vinyl tape to the stepped portion of the pin-
ion shaft, and coat the surface of the vinyl taoe with
the power steering fluid.
2. Install the backup ring ('96 -'97 models) or wavewasher ('98 -'00 models) with its tapered side as
shown below.
3. Coat the inside surface of the new valve oil sealwith power steering fluid.
4. Slide the valve oil seal over the pinion shaft, being
careful not to damage the sealing lip.
Vinyl t.po{Stepped ponion}
Tap6red position.
BACKUPGroove side.
sure the spring isseatod in the oil seal.
'98 - '00 mod.b:
CAUTION: InstEll ihe valve oil seal whh its groov.d
3ide tacing opposite tho boaring.
Apply vinyl tape to the splines and stepped portion
of the shaft, and coat the surface of the vinyl tapewith the power steering fluid.
Fit the new O-ring in the groove of the pinion shaft.Then slide the new valve seal ring over the shaft
and the groove in on the pinion shaft.
Remove the vinyl tape from the pinion shaft,
'96 - '97 models:
lip
7.
VALVE SEAL RIiIGReplace.Do not over-expand.
17-56
8. Apply power steering fluid to the surface of the
valve seal ring that was installed on the pinion
shaft.
9. Apply power steering fluid to the inside of the spe-cial tool. Set the larger diameter end of the specialtool over the valve seal ring.
10. Move the special tool up and down several times tomake the valve seal ring fit in the pinion shaft.11, Remove the soecial tool.
12. 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 tomake the valve seal ring fit snugly in the pinion
shaft.
PISTON SEAL BINGSIZING TOOL07NAG - SR:togoAol07NAG - SR3|X)00
(g(m
Use the larger diameterend of the specialtool first to makethe valve seal ringfit in the pinionshaft.
Make the valve seal ringfit snugly in the pinionshaft using the other end(smaller diameter end) ofthe specialtool.

I
14.
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. Installthe 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. Do not mix the different types of
sleeve seal rings as they are not compatible
Set the special tool in the grooves in the sleeve, and
set each ring in each groove securely.
NOTE: After installation, compress the seal rings
with your fingers temPorarilY
BALL JOINT BOOI CLIP GUIDE
07S7,1- SA50800
SLEEVE
15. Apply power steering fluid to the seal rings on the
sleeve, and to the entire inside surface of the spe-
cial tool.
16. lnsert the sleeve into the specialtool slowly'
17. Move the sleeve each direction several times to
make the seal rings snugly fit in the sleeve'
NOTE: Be surerings are not turned uP.
SITEVE SEAL RINGSIZING TOOL0797a - SA5020A or07974 - SA50200
that the seal
fr
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17-57
18. Apply power steering fluid to the surface o{ 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.
Installthe circlip with its radiused side toward the
sleeve.
Apply power steering fluid to the seal ring lip of the
valve oil seal. then install the seal in the valve hous-
ing using a hydraulic press and special tools as
shown.
CAUTION: Install the valve oil seal with its grooved
side facing the tool.
'19.
ATTACHMENT.32x35mm0774.6 - q)101(x)Pre3s
IDRIVER07749 - 0010000
VALVE OIL SEALReplace.Make sure thespring is in the
oil seal. (cont'd)

)
Steering Rack Reassembly
25. Coat the piston seal ring guide with power steering
fluid, then slide it onto the rack, big end first'
26. Position the new O-ring and new piston seal rlng on
the special tool, then slide them down toward the
big end of the tool
NOTE:
. Do not over expand the resin seal rings lnstali
the resin ;eal rings with care so as not to dam-
age them. After installation, be sure to contract
the seal ring using the specialtool (sizing tool)
. Replace the piston's O-ring and seal 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
ol the O-ring
PISTON SEAL RINGGUIDE07GAG - SD4O10A ol
07GAG - SD,ol(xt
Coat the piston seal ring and the inside of the spe-
cial toolwith power steering fluid.
Carefully slide the tool onto the rack and over the
piston seal ring.
Move the special tool back and forth several times
to make the piston seal ring fit snugly in the piston'
PISTONReplace.
E
PISTON
31. Wrap vinyl tape around the rack teeth and rack end
edges, then coat the surface of the tape with the
power steering fluid
NOTE: Make sure that the vinyl tape is wrapped
carefully so that there is no stepped portion
Coat the inside surface of the new cylinder 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 caieful not damage the sealing lip face of tho
seal with the edgss or teeth of th€ ste€ring rack'
CYLINDER END SEAL
Make sure thesPring is in the cylinder
end soal
Remove the vinyl tape from the steering rack
NOTE: Remove any residue oftape adhesive(cont'dl
17-59

)
1.Loosen the wheel nuts slightlY.
Raise the front of the vehicle, and support it with safe-
ty stands in the proper locations (see section 1).
Remove the wheel nuts and wheel.3.
l)
WHEEL NUT'108 N.m
18'l N.m 118.5 kgf m, 134lblfti
Replace.NOTEI Before installing the spandle nut, apply
engine oil to the seating surface of the nut After
tightening, use a drift to stake the spindle nut
shoulder againsl the driveshaft
Raise the locking tab on the spindle nut, then remove
the nut.
Remove the brake hose mounting bolts.
BRAKE HOSE MOUNTING BOLT
I x 1.25 mm12 N.m (1,2 kgtm,8,7 lbf'ftl
6. Remove the caliper mounting bolts and hang the
caliper assembiy to one side
CAUTTON: To prevent accidental damage to the
caliper assembly or brake hoso' use a short piece of
wire to hang the caliPer tlom lhe undelcarriage.
{11 kgf m, 80 lbl.ft)
CALIPER MOUNTING BOLTS12 x 1.25 mm108 N.m {'11.0 kgtm, 80 lbt.ft)
7. Remove the 6 mm brake disc retaining screws.
8.
I x 1.25 mm BOLTS
Screw two 8 x 1.25 mm bolts into the disc to push it
away from the hub,
NOTE: Turn each bolt two turns at a tame to prevent
cocking the disc excessivelY.
Remove the brake disc from the knuckle.
Check the front hub for damage and cracks.
Remove the wheel sensor from the knuckle (for
vehicles with ABS).
NOTE: Do not disconnect the wheel sensor connec-
tor.
N.m
6 mm BRAKE OISCRETAINING SCREWS9.8 N.m t1.0 kgf.m, 7 lbf'ft)
{'1.0 kgf m,
7 tbf.ft)
10.
11.
MOUNTING
WHEEL
BOLTS9.8 N.m11.0 kgf,m, 7 lbf'ft)(cont'd)

)
20, Remove the cotter pin from the lower arm ball joint
castle nut. and remove the nut.
COTTER.PINReplace.On reassembly,bend the cotter Pan
lr
CASTLE NUT12 x 1.25 mm49 - 59 N.m (5.0 - 6.0 kgl m,36-,13 lbf'ft|
BALL JOINT REMOVER, 28 mm
07MAC - SL00200
21. lnstall a 12 mm hex nut onto the ball joint. Be sure
that the hex nut is flush with the ball joint pin end'
or the threaded section of the ball joint pin might be
damaged by the ball joint remover.
22. Use the special tool as shown on page l8-12 to sep-
arate the ball ioint and lower arm.
NOTE; lf necessary, apply penetrating type lubri-
cant to loosen the ball joint.
lJ
18-13
25.
26.
Remove the cotter pin from the upper ball joint cas-
tle nut, and remove the nut.
12 mm HEX NUT 07MAC - SL00200
lnstall the 12 mm hex nut onto the ball joint
Be sure that the hex nut is flush with the ball joint
pin end, or the threaded section of the ball joint pin
mlght be damaged by the ball joint remover'
Use the special tool as shown on page l8-12 to sep-
arate the ball joint and knuckle.
NOTE: lf necessary, apply penetrating type lubri
cant to loosen the ball joint.
Putl the knuckte outward and remove the driveshaft
outboard joint from the knuckle by tapping the drive-
shaft end with a plastic hammer, then remove the
knuckle.KNUCKLE
'12 x 1.25 mm39 - 47 N.m
14.0 - 4.8 kgf m,29 - 35 tbf.ft)
Check for damage.