1998 HONDA CR-V Rear wheel hub

2.
L
E Position
The power flow when decelerating is as follows:
Rolling resistance trom the road surface goes through the tront wheels (and rear wheels: 4WD) to the final drive gear.
then to the sub-shaft lst gear via the 4th gear. and 1st-hold clutch which is applied during deceleration.
The one-way clutch is free because the application of torque is reversed.
The counterforce conveyed to the countershaft 4th gear turns the sub-shaft 4th gear via the mainshaft 4th gear. Since
hydraulic pressure is also applied to the 1st clutch. counterforce is also transmitted to the mainshaft. As a result,
engine braking can be obtained with'lst gear.
NOTE: The illustration shows the 4WD automatic transmission; power flow of the 2WD automatic transmission is identi-
cal to the 4WD except tor parts related to the transfer assembly.
J.
SUB.SHAFT 1ST GEAR
TOROUE CONVERTER
FINAL DRIVE GEAR
SUB.SHAFT{TH GEAR
MAINSHAFTlST GEAR
lST CLUTCH
MAINSHAFT
COUNTERSHAFT
REVERSE SELECTOR HUB
REVERSE SELECTOR
COUNTERSHAFTIITH GEAR
FINAL ORIVEN GEAR
TRANSFER SHAFT DRIVE GEAR {4WDI
TRANSFEB SHAFT {{WD){cont'd}
lST.HOLD CLUTCH
TRANSFER DRIVEN GEAR SHAFT {,lWDl
14-9
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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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Rear Driveshafts
't.
Removal
Loosen the rear wh€el nuts slightly.
Raise the rear of the vehicle, and support it withsafety stands in the proper locations (see section 1),
Remove the wheel nuts and rear wheets.
SPINDLE NUT22 x 1.5 mmReplace.
WHEEL NUT12 x 1.5 mm
4.Lift up the locking tab on the spindle nut. thenremove the nut.
Remove the rear driveshafts from the rear differen-tial assembly (see section 15),
Remove the rear driveshaft outboard joint from thetrailing arm and rear hub using a plastic hammer ora puller if necessary.
TRAILING ARMOUTBOARD JOINT
16-22
Disassembly
NOTE:
a Due to the amount of work required to replace onedamaged boot, it is best to replace both boots at thesame time.
. These instructions are for the inboard joint. The sameprocedure applies to the outboard joint.
1, Remove the set ring from the inboard joint,
BOOT BANDReplace.
INBOARD JOINT
2. Remove the boot band.
- lf the boot band is a double loop type, raise theband bend as shown,
DOUSLE LOOP BANDReplace.
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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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Wheel/Hub lnspection
Bearing End Play
1.Raise the vehicle off the ground, and make sure it is
securely supported.
Remove the wheels, then reinstall the wheel nuts.
Attach the dial gauge as shown.
Measure the bearing end play by moving the disc or
drum inward or outward.
Front/Rear;
Standard: 0 - 0.05 mm (0 - 0.002 in)
Measure end play at thehub flange.
Rear:
Measure end play at center ofthe hub flange.108 N.m{11.0 kgf.m, q} lbf.ftl
It the bearing end play measurement is more than
the standard, replace the wheel bearing.
1.
Wheel Runout
Raise the vehicle off the ground, and make sure it is
securely supported,
Check for bent or deformed wheels.
Attach the dial gauge as shown.
Measure the wheel runout by turning the wheel.
Front and Rear Whoel Axial Runout:
Standard:
Steel Wheel: 0 - 1.0 mm {0 - 0.0i[ in]
Aluminum Wheel: 0 - 0.7 mm l0 - 0.03 in)
Service Limit:2.0 mm 10.08 inl
Front and Rear Wheel Radial Runout:
Standard:
Steel Whoal: 0 - 1.0 mm (0 - 0.04 inl
Aluminum Whoel: 0 - 0.7 mm {0 - 0.03 in}
Servics Limit:1.5 mm (0.06 inl
lf the wheel runout is more than the service limit,
reolace the wheel.
18-7
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Rear Suspension
Hub Bearing Unit Replacement
Note these items during replacement:
. Use only genuine Honda wheel weights for aluminum wheels. Non-genuine wheel weights may corrode and damage
the aluminum wheels.
. Before installing the brake drum, clean the mating surfaces of the rear hub and the brake drum.
. Before installing the wheel, clean the mating surfaces of the brake drum and wheel.
FLANGE BOLI12 x 1,25 mm103 N.m 110.5 kgf.m,76 tbtfr)
BACKING PLATE
SPINDI-E NUT22 x'1.5 mm181 N.m {18.5 kgf.m, 134 lbf.ftlReplace.NOTE: Alter tightening, use a driftpunch to lock the spindle nut shoulderinto the spindle.
BRAKE SHOE
TRAILING ARMCheck {or crackingano oamage.
FLANGE BOLT10 x 1.25 mm64 N'm 16.5 kgf.m, 4? lbt.ft)
Check for crackingano oamage.
BRAKE DRUMCheck for wearano oamage,
WHEEL NUT12 x 1.5 mm108 N.m {11.0 kgt m,80lbtftl
1A-20
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Raise the rear of the vehicle, and make sure it is
securely supponed.
Remove the rear wheel.
Remove the brake drum from the hub by threading
8 x,r.25 mm bolts into the drum to push it away
from the hub bearing unit. Turn each bolt two turns
at a time to prevent cocking the drum excessively.
SPINDLE NUTWHEEL NUT
r81 N.m t18.5 kgt m, 134 lbt'ftl 12 x 1.5 mm
Replace. 108 N m 111.0 kgf'm, 80 lbf ftl
't.
4.
8 x 1.25 mm BOLTS
i+/3 /',1
"@,1 /
.'--7 J-->-
5.
6.
Raise the locking tab on the spindle nut, then
remove the nut.
Remove the brake shoes.
Remove the parking brake cable from the backing
plate using a 12 mm offset wrench as shown.
BACKING PLATE
PARKING ARAKE CABLE
1a-21
7.
6.
Disconnect the brake line from the wheel cylinder.
Remove the wheel sensor from the backing plate
(for vehicles with ABS). Do not disconnect the
wheel sensor connector.
Remove the 12 mm flange bolts.
PULLERlCommercially available)
4WD; Remove the backing plate/hub bearing unit
from the rear axle with a puller if necessary.
Separate the rear hub from the hub bearing unit
using the specialtools and a press.
Note the following items during disassembly:
. Take care not to distort the backing plate.
. Hold on to the hub to keep it from falling when
a
10.
11.
DRIVER ATTACHMENT,37 x ilo mm07746 - 0010200
(cont'd)
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Rear Suspension
Hub Bearing Unit Replacement (cont'd)
12, Press the wheel bearing inner race from the hub
using the tools, a bearing separator, and a press.
HUB DIS/ASSEMBLY TOOL07965 - SA50100
BEARINGSEPARATOR0 -,t 1/2 in {0 - 11i1.3 mml(Commercially qvailable)
13. Remove the 12 mm flange bolts.
HUB BEARING UN]T O.RING
14. Remove the hub bearing unit from the backing
plate.
15. Install a new O-ring on the hub bearing unit.
FLANGE BOLTS10 x 1.25 mm64 N.m (6.5 kgf.m, 47 lbf.ftl
16. Install the hub bearing unit on the backing plate.
18-22
't7.Install the hub bearing unit onto the rear hub using
the special tools and a press.
DRIVERATTACHMENT,60 mm07LAO - SM40100
Prcss
+
DRIVER07749 - 0010000
BEARING
18. Install the backing plate/hub
trailing arm.
FLANGE BOLTS12 x 1.25 mm103 N.m 110.5 kgf'm,75lbfft)
bearing unit on the
19. Install the hub bearing unit in the reverse order of
removal, and pay particular attention to the follow-
ing items:
. Before installing the spindle nut, apply a small
amount of engine oil to the seating surface of the
nut, After tightening, use a drift to stake the spin-
dle nut shoulder against the driveshaft.
. Avoid twisting the sensor wires when installing
the wheel sensor,
. Fill the brake reservoir and bleed the brake sys-
tem {see section 19).
. Adjust the parking brake (see section 191.
. Check the rear wheel alignment, and adjust it if
necessary (see page 18-4).
REAR HUB
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