1997 HONDA CR-V Front hub assembly

Description
Rear Differential
Outline
The Real-time 4WD-Dual Pump System model has a hydraulic clutch and a differential mechanism in the rear differential
assembly. Under normal conditions, the vehicle is driven by the front wheels. However, depending on to the driving force
of the front wheels and the road conditions. the system instantly transmits appropriate driving force to the rear wheels
without requiring the driver to switch between 2WD (tront wheel drive) and 4WD (four wheel drive). The switching mecha-
nism between 2WD and 4WD is integrated into the rear differential assembly to make the system light and compact.
ln addition, the dual-pump system switches off the rear-wheel-drive force when braking in a forward gear. This allows the
braking system to work properly on models equipped with an Anti-lock Braking System (ABS).
Construction
The rear differential assembly consists of the torque control differential case assembly and the rear differential carrier
assembly. The torque control differential case assembly consists of the differential clutch assembly, the companion
flange, and the oil pump body assembly. The rear differential carrier assembly consists of the differential mechanism. The
differential drive and driven gears are hypoid gears.
The oil pump body assembly consists of the front oil pump, the rear oil pump, the hydraulic control mechanism, and the
clutch piston. The clutch piston has a disc spring that constantly provides the differential clutch assembly with a preset
torque to Drevent abnormal sound.
The clutch guide in the differential clutch assembly is connected to the propeller shaft via the companion flange, and it
receives the driving force lrom the transfer assembly. The clutch guide rotates the clutch plate and the front oil pump in
the oil pump body.
The clutch hub in the differential clutch assembly has a clutch disc that is splined with the hypoid drive pinion gear. The
hypoid drive gear drives the rear oil pump.
The front and rear oil pumps are trochoidal pumps. The rear oil pump capacity is 2.5 percent larger that the front oil pump
to handle the rotation difference between the front and rear wheels caused by worn front tires and tight corner braking.
The oil pumps are designed so the fluid intake works as a fluid discharge when the oil pumps rotate in reverse. Genuine
Honda CVT fluid is used instead of differential fluid.
Operation
When there is a difference in rotation speed between the front wheels (clutch guide) and rear wheels (hypoid driven gear),
hydraulic pressure from the front and rear oil pumps engages the differential clutch, and drive force from the transler
assembly is applied to the rear wheels.
The hydraulic pressure control mechanism in the oil pump body selects 4WD mode when the vehicle is started abruptly,
or when accelerating in a forward or reverse gear (causing rotation difference between the front and rear wheels). or
when braking in reverse gear {when decelerating). lt switches to 2WD mode when the vehicle is driven at a constant speed
in forwar! or reverse gear (when there is no rotation difference between the front and rear wheels), or when braking in a
fo rwa rd gear (when decelerating).
To protect the system, the differential clutch assembly is lubricated by hydraulic pressure generated by the oil pumps in
both 4WD and 2WD modes. Also, the thermal switch relieves the hydraulic pressure on the clutch piston and cancels 4WD
mode if the temDerature of the differential fluid rises above normal.
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TOROUE CONTROL OIFFERENTIAL
REAR DIFFERENTIAL ASSEMBLY
OIL PUMP BODY
OIFFERENTIAL CLUTCHHYPOID DRIVEPINION GEAR
OIFFERENTIAL CARRIER
DIFFERENTIAL
HYPOID RING GEAR
DIFFERENTIAI- HOUSING
REAR OII- PUMP
ASSEMBLY
CLUTCH GUIDE
COMPANION FLANG€
CLUTCH HUB
CLUTCH PLATE
HYDRAULIC CONTROL SYSTEM
CLUTCH PISTON
CLUTCH DISC
REAR OIL PUMP
FRONT OIL PUMP
DISC SPRINGFRONT OIL PUMP
DIFFEREMT|AL CLUTCHASSEMBI-Y
THERMAL SWITCHRELIEF VALVEOIL STRAINER
15-5
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13, Pull the knuckle outward, and remove the driveshaft
inboard joint from the differential case or bearing
suoDort.
KNUCKLE
Remove the driveshaft outboard joint from the front
wheel hub using a plastic hammer.
PLASTIC HAMMER
14.
DRIVESHAFT
DRIVESHAFT
Disassembly
Inboard Joint Sid€:
1, Carefully clamp the driveshaft in a vise with softjaws, then remove the set ring from the inboardjoint.
2. Remove the boot bands. Take care not to damage
the boot,
. lf the boot band is a locking tab type, pry up the
locking tabs with a screwdriver, and lift up the
end of the band.
. lf the boot band isawelded typeora low profile
type, carefully cut the boot band with a pair of
diagonal cutters.
. lf the boot band is a double loop type. lift up the
band bend.
Locking Tab
SET BINGReplace.
Welded
{cont'd)
16-5
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Steering
Special Toofs ............. 17-2
Component Locations
Index ................ ....... 17-3
Troubleshooting
General Troubleshooting ................ 1 7-4
Noise and Vibration ......................... 17-8
Fluid Leaks ............. 17-10
Inspection and Adiustment
Steering Operation .......................... 17-12
Power Assist Check
With Vehicle Parked ....................
Steering Linkage and Gearbox .......
Pump Belt
Rack Guide Adjustment ...................
Fluid Rep|acement ...................,,.,....
Pump Pressure Check .................,,...
*Steering Wheel
Removal ................. 17-18
*Steering Column
Removal/lnstallation ................ ....... 17 -2O
lnspection .............. 17-21
Steering Lock Replacement ............ 17 -22
Power Steering Hoses, Lines
Ffuid Leakage Inspection ................. 17 -23
Repfacement .......... 17-23
Power Steering Pump
Repfacement .......... 17-24
Disassembly ...........17-25
fnspection .............. 17-26
Reassembly ............ 17-28
Power Steering Gearbox
Removal ................. 17-31
Disassembly ........... 17-34
Reassembly ............ 17-40
Ball Joint Boot Replacement .......... 17-50
Installation ............. 17-51
17-12
17-13
17-14
l7-15
17-15
17-16
Disassembly/Reassembly............... 17-18
4'%/b.......... -r'-7--a/
SUPPLEN\EN AL RES\RA(N SYSTES{ (SRS\
This model has an SRS which includes a driver's airbag in the steering wheel hub. a passenger's airbag in the dashboardabove the glove box ('97 - 00 models), and seat belt tensioners in the seat belt retractors ('98 - 00 models). Informationnecessary to safely service the SRS is included in this Service Manual. ltems marked with an asterisk (*) on the contentspage include, or are located near, SBS components. Servicing. disassembling or replacing these items will require specialprecautions and tools, and should only be done by an authorized Honda oearer.
To avoid rendering the SRS inoperative, which could lead to peFonal iniury or death in the event of a sevore trontalcollision. allSRS service work must be performod by an authorized Honda dealer.lmproper service procedurgs, including incorrect removal and installalion of the SRS, could lead to personal iniurycaused by unintontional deployment of th€ airbags {'97 - 00 models), and seat belt tensioners ('98 - 00 modelsl.Do not bump the SRS unit. Otherwise, the system may lail in case ot a collision, or the airbags may deploy when theignition switch is ON (lll.
SRS electrical wiring harnesses are identitied by yellow colof coding. Ralated components are located in the steeringcolumn, front console, dashboard, dashboard lower panel, and in the dashboard above the glove box. Do not use elec-trical test equipment on these cilcuits,
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Steering Wheel
Removal
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section (24) before performing repairs or ser-
vice.
1. Align the front wheels straight ahead. then remove
the driver's airbag assembly (see section 24) from
the steering wheel.
2. Disconnect the horn connector and cruise control
switch connectors.
CONTROLSWITCHES CONNECTOR
3. Loosen the steering wheel bolt, then install a steering
wheel puller on the steering wheel and remove it.
Note these items when removing the steering wheel:
. Do not tap on the steering wheel or the steering
column shaft when removing the steering wheel.
. lf you thread the puller bolts into the wheel hub
more than five threads, the bolts will hit the cable
reel and damage it. To prevent this, install a pair
of jam nuts five threads up on each puller bolt.
STEERING WHEEL BOLT39 N.m 14.0 kgt.m,29 lbtftl
STEERING WHEEL EOLT
Disassembly/Reassembly
EOSS COVER PLATE
_^M
STEERING WHEEL
WHEEL BODY COVER
17-18
@,
ACCESS PANEL
h"\
BODYCOVER CAP
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Suspension
Special Tools ............. 18-2
Component Locations
lndex ................ ...... 18-3
Wheel Alignment
Service lnformation ......................,.. 18-4
Camber .................. 18-4
Caster ............... ...... 18-5
Front Toe Inspection/
Adiustment ........ 18-5
Rear Toe Inspection/
Adiustment ........ 18-6
Turning Angle Inspection/
Adiustment ........ 18-6
Wheel/Hub Inspection
Bearing End Play .......................,...... 18-7
Wheel Runout ....... 18-7
Front Suspension
Suspension Arms Replacement ..... 18-8
Knuckle/Hub Replacement ............. 18-9
Lower Ball Joint Replacement ....... 18-15
Ball Joint Boot Replacement .......... 18-16
Front Damper
Removal ................. 18-16
Disassembly/lnspection .................. 18-1 7
Reassembly ........... 18-18
lnstallation ............. 18-18
Rear Suspension
Suspension Arms Replacement ..... 18-19
Hub Bearing Unit Replacement ...... 18-20
Upper Arm Bushing
Replacement ..... 18-23
Rear Damper
Removal ................. 18-23
Disassembly/1nspection .................. 18-24
Reassembly ........... 18-25
lnstallation ............. 18-25
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Front Suspension
Knuckle/Hub Replacement (cont'dl
1.Loosen the wheel nuts slightly.
Raise the front of the vehicle, and make sure it is
secu.ely supported.
Remove the wheel nuts and wheel.
SPINDLE NUT24 x 1,5 mm245 N.m (25.0 kgf.m, 181 lbtft)Replace.
Raise the locking tab on the spindle nut, then remove
the nut.
Remove the brake hose mounting bolts.
BRAKE HOSE MOUNTING BOLT8 x 1.25 mm22 N.m {2.2 kgt m, 16 lbtft)
CALIPER MOUNTING BOLTS12 x 1.25 mm108 N.m (11.0 kgl.m, 80 lbl.ft)
Remove the caliper mounting bolts, and hang the
caliper assembly to ona side. To prevent damagg to
the caliper assembly or brake hose, use a shortpiece of wire to hang the caliper from the undercar-
riage.
18-10
7. Remove the 6 mm brake disc retaining screws,
6 mm BRAKE DISCRETAINING SCREWS9.8 N.m(1.0 kgl.m,7.2 lbf.ftl
8.
8 x 1.25 mm BOLTS
Screw two 8 x 1.25 mm bolts into the disc to push it
awav from the hub. Turn each bolt two turns at a
time to prevent cocking the disc excessively,
Remove the brake disc from the knuckle.
Check the front hub for damage and cracks.
11. Remove the wheel sensor from the knuckle (for
vehicles with ABS). Do not disconnect the wheel
sensor connector.
9.8 N.m(1.0 kgf.m,7.2 tbttrl
MOUNTINGBOLTS9.8 N.mlr.0 kgf.m, ?.2lbf.ftl
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Front Suspension
Knuckle/Hub Replacement (cont'd)
20. Remove the cotter pin from the lower arm ball joint
castle nut, and remove the nut.
COTTER PINReplace.On ra6ssembly,bend the cofter pin
CASTI.E NUT12 x 1.25 mmilg - 59 N.m (5.0 - 6.0 kgf.m, 36 - a3 lbf.ftl
CASTLE NUT12 x 1.25 mm
COITER PINReplace.
BALL JOINT REMOVER, 28 mm07MAC - Sl(xr2(x,
Install a 12 mm hex nut on the ball joint. Make sure
the hex nut is flush with the ball joint pin end, or the
threaded section of the ball joint pin might be dam-
aged by the ball joint remover.
Use the special tool as shown on page 18-11 to sep-
arate the ball joint and lower arm. lf necessary,
apply penetrating type lubricant to loosen the balljoint.
18-12
23. Remove the cotter pin from the upper ball joint cas-
tle nut, and remove the nut.
COTTER PINReplace.On reassembly, bendthe cotter pin as shown.
CASTLE NUT10 x 1.25 mm39 - 47 N.m14.0 - ,4.8 kgt m,29 - 35 tbt.ftl
24.
25.
26.
10 mmnEMOVER, 28 mm07MAC _ SLtD2(xl
Install the 10 mm hex nut on the ball joint.
Make sure 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.
Use the special tool as shown on page 18-11 to sep-
arate the ball joint and knuckle. lf necessary, apply
penetrating type lubricant to loosen the ball joint.
Pull the knuckle outward, and remove the driveshaft
outboard joint from the knuckle by tapping the driv+
shaft end with a pl8stic hammer, then remove the
knuckle.
KNUCKI.ECheck lor damage.
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