wheel cylinder HONDA CR-V 2000 RD1-RD3 / 1.G User Guide

Forward Deceleration l2WDl
During forward deceleration, the dual pump system functions in two wheel drive mode.
Because of braking characteristics, the speed of the rear wheels may exceed the speed ol the front wheels during deceler-
ation. lf so, the rear oil pump spins faster than the front oil pump.
Fluid discharged by the rear oil pump is simply drawn in again by the rear pump and recirculated. Because there is no
pressure built up at the clutch piston. the clutch piston does not engage, and the vehicle remains in 2WD (front wheel
drive).
Reverse Start and Acceleration (4WD)
During reverse start and reverse acceleration, the dual pump system can engage four wheel drive.
lf the front wheels spin faster than the rear wheels, the front oil pump spins faster than the rear oil pump. The front oil
pump draws in fluid through check valve A and discharges it. {Note that in reverse, the direction of the pumps is the oppo-
site of that during forward driving.)
Some of the fluid that is discharged by the front oil pump is drawn in by the rear oil pump. The remaining fluid passes
through check valve F into the cylinder of the clutch piston, where it is regulated by two orifices.
The regulated hydraulic pressure at the clutch piston may force the plates and discs of the clutch together to form a con-
nectlon. The engaged clutch passes driving force from the transfer assembly to the rear wheels, producing 4WD.
oRtFtcEsFRONT OIL PUMP
{cont'd)
15-7
REAR OIL PUMP
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Abnormal
Not deformed
Deformed
Faulty cylinder lines
Readjust the rack guide(see page 17-15)
Bent
IFaulty steering gearbox
Compair the steering to anotheralike vehicle.
(cont'd)
17-5
Adjustment OK
Check the force required to turnthe wheel lsee page 17 12).Start the engine and measure theforce required to turn the wheelto the right and left. Difference ofthe force required to turn thewheel to the right and to the leftshould be 2.9 N (0.3 kgf,0.7 lbt)or less,
Normal
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Troubleshooting
General Troubleshooting (cont'dl
Assist (excessively light steering) athigh speed.
Shock or vibration when wheel isturned to full lock.
Steering wheel will not returnsmoothly.
lf the problem is not corrected byadjusting the rack guide, adjustthe front wheel alignment (see
section 18).
Check the rack guide for proper
adjustment (see page 17-15).
Check the rack guide for properadjustment (see page 17'15).
Adjust the rack guide.
Rack guide is adiusted properly.
lf the problem is not corrected byadjusting the rack guide, replacethe gearbox.Check the belt for slippage andadjust as necessary (see page 17-14).
A and B cylinder lines are normal, check wheel alignment (see
section 18).
Wheel alignment is abnormal,adjust as needed.
Wheel alignment is normal.Check the steering wheel opera-tion and power assist check (seepage 17-121.
lf the measurements are out ofspecifacations, adjust the rackguade.
lf the problem is not corrected byadjusting the rack guide, replacethe gearbox,
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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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Brakes
Special Tools ............. 19-2
Component Locations
lndex ................ ...... 19-3
Inspection and Adlustment
Brake System Rubber Parts
and Brake Booster ..........,,,.......... 19-4
Brake Pedal ............ 19-5
Parking Brake ........ 19-6
Bleeding ................. 19'7
Brake System Indicator ................... 19-8
Front Brake Pads
Inspection and Replacement .......... 19-9
Front Brake Disc
Disc Runout Inspection ................... 19-11
Disc Thickness and
Parallelism Inspection ........,........ 19-1 1
Front Brake Caliper
Disassembly/Reassembly ............... 19-12
Master Cylinder/Brake Booster
Removal/lnstallation ....................... 19-13
Master Cylinder
Inspection/Disassembly .............. 19-14
Pushrod Clearance Adiustment ...... 19-14
Brake Booster Inspection ...,.,,,,....... 1 9-1 5
Rear Drum Brakes
Inspection .............. 19-15
Brake Shoes
Replacement ..... 19-r 8
Wheel Cylinder Replacement ......... 19-20
Brake Hoses/Lines
Inspection/Torque Specifications ... 19-21
Hose Replacement ....,...,............. ..,,, 19-22
Parking Brake Cable
Inspection and Replacement .......... 19-23
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Gomponent Locations
lndex
ERAKE SYSTEM INOICATORCircuit Diagram, page't9-8
PARKING BRAKEAdjustment, page 19-6Parking Brake Switch Test, page '19-8
PARKING BRAKE CABI..EInspection and Replacement,page 19-23
BRAKE BOOSTERBrake Booster Inspection, page 19-15
Removal/lnstallation, page 19 13
MASTER CYLINDER
Inspection, pago 19-16Brake Shoes Replacement,page 19-18Wheel CylinderReplacement, page 19-20
REAR DRUM BRAKE
Removal/lnstallation, page 19-13lnspection/Disassembly.page 19-14Pushrod Clearance Adjustment,page 19 ldBrake Fluid LevelSwitch Test,page 19-8
Inspection/Torque Specification, pag€'19-21
Hose Replacement, Page 19-22
Front Brake Pads, page 19-9Front Brake Disc. page 19-11Front Brake Caliper, page 19-12
)i't ' -"''
/'"''t,'..,1 ...,. , \,,,.
i ,.'
'a.,
I
.) ..)
t ^fl)
19-3
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Inspection and Adjustment
Brake System Rubber Parts and Brake Booster
@-Brake Booster
Check brake operation by applying the brakes.
lf the brakes do not work properly, check the brake
booster. Replace the brake booster as an assembly ifit does not work properly or if there are signs of leak-
age.
@-Piston Cup and Pressure Cup Inspection. Check brake operation by applying the brakes.
Visually check for damage or signs of tluid leakage.Replace the master cylinder as an assembly if thepedal does not work properly or if there is damage orsigns of fluid leakage.
. Check for a difference in brake pedal stroke betweenquick and slow brake applications. Replace the mas-.
ter cylinder if there is a difference in pedal stroke.
(9-Brake Hoses
Visually check for damage or signs of fluid leakage.
Replace the brake hose with a new one if it is dam-
aged or leaking.
O-Caliper Piston S€al and Piston Boots
Check brake operation by applying the brakes.
Visually check for damage or signs of fluid leakage. lf
the pedal does not operate properly, the brakes drag,
or there is damage or signs of fluid leakage, disas-
semble and inspect the brake caliper. Replace the
boots and seals with new ones whenever the brake
caliper is disassembled.
@-Wheel Cylinder Piston Cup and Dust Cover
Check brake operation by applying the brakes.
Visually check for damage or signs of fluid leakage. lf
the pedal does not operate properly, the brakes drag,
or there is damage or signs of fluid leakage, replace
the wheel cvlinder.
19-4
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Bleeding
CAUNON:
. Do not spill brake tluid on the vehicle. it may damage
the paint; if brake fluid does contaqt th€ paint, wash
it otf immodiately with water.
. Maks sure no dirt oy other forsign matter is allowsd
to contaminate the brake fluid.
NOTE:
. Do not reuse the drained fluid.
. Always use Genuine Honda DOT 3 Brake Fluid. Using
a non-Honda brake fluid can cause corrosion and
decrease the life of the svstem.
. The reservoir on the master cylinder must be at the
MAX (upper) level mark at the start of bleeding pro-
cedure and checked after bleeding each brake caliper
and wheel cylinder. Add fluid as required.
1, Make sure the brake fluid level in the reservoir is at
the MAX (uDDer) level line.
MAX {UPPER) LEVELLINE
RESERVOIR
MASTER CYLINDER
2.
3.
Have someone slowly pump the brake pedal several
times, then apply steady pressu.e.
Loosen the brake bleed screw to allow air to escape
from the system. Then tighten the bleed screw
securely.
Repeat the procedure for each wheel in the sequence
shown below until air bubbles no longer appear in
the tluid.
Refill the reservoir on the master cvlinder to the
MAX (upper) level line.
ALEEDING SEOUENCE:
O Front RightGt Rear Right
O Front LeflO Rear Left
NOTE: Bleed the front calipers first in the bleeding
procedure.
4.
FRONT:
BLEEO SCREW7 N.m (0.? kgf.m, 5 lbf.ftl
19-7
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Check the wheel cylinder for leakage.
Check the brake linings for cracking, glazing, wear,
and contamination.
Measure the brake lining thickness. Measurement
does not include brako shoe thickness.
Brake Lining Thicknoss:
Standard: 3.9 -,1.5 mm {0.15 - 0.18 inl
Sorvice Limil: 2.0 mm {0.08 in}
lf the brake lining thickness is less than the service
limit, replace the brake shoes as a set.
Check the bearings in the hub unit for smooth oper-
ation; if the bearing require servicing. refer to sec-
tion 18.
7.
WHEEL CYLINOER
LININGS
8. Measure the inside diameter of the brake drum
with inside vernier calioers,
Drum Insido Diamoter:
Standard: 219.9 - 220.0 mm (8.657 - 8.661 in)
Service Limit: 221.0 mm {8.700 inl
lf the inside diameter of the brake drum is more
than the service limit, replaca the brake drum.
Check the brake drum for scoring, grooves, and
cracKs.
10.
BRAKE DRUM
19-17
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Rear Drum Brakes
Brake Shoes Replacement
1. Remove the upper return spring with the tool.
l@ w€ar eye protestion when using the
brske spring wrench.
RETAINER SPRINGBRAKE SPRING WBENCH{Commerciallv available)
Remove the tension pins by pushing the retainer
spring and turning them.
Lower the brake shoe assembly, and remove the
lower return spring, Make sure not to damage the
dust cover on the wheel cylinder,
Disconnect the parking brake cable from the parking
brake lever.
Remove the brake shoe assembly,
Remove the upper return spring, self-adjuster lever,
and self-adjuster spring, and separate the brake
shoes.
TENSION PIN
5.
o.
SELF.ADJUSTER LEVER UPPER RETURN SPRING
19-18
7. Remove the wave washer, parking brake lever. and
pivot pin from the brake shoe by removing the U-
cliD.
BRAKE SHOE
Apply brake cylinder grease (P/N: 08733 - 80202) or
equivalent rubber grease to the sliding surface of
the pivot pin, 8nd insert the pin into the brake shoe.
Install the parking brake lever and wave washer on
the pivot pin, and secure them with a new U-clip.
. lnstall the wave washer with its convex side fac-
Ing our.
. Pinch the U-clip securely to prevent the pivot pin
from coming out of the brake shoe.
U.CLIPReplace.
\\
w

U-CLIPReplace.WAVE WASHERReplace.
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