Acura RL (1996-2004 year). Manual — part 497
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Front Brake Pads
Inspection and Replacement
• Never use an air hose or dry brush to clean brake
assemblies.
• Use an OSHA-approved vacuum cleaner to avoid
breathing brake dust.
1. Loosen the front wheel nuts slightly, then raise the
vehicle, and support it on safety stands. Remove
the front wheels.
2. Remove the brake hose bracket from the knuckle.
BRAKE HOSE BRACKET
CALIPER BOLT
CALIPER BODY
3. Hold the caliper pin with a wrench, being careful
not to damage the pin boot. Remove the caliper bolt
with another wrench, and pivot the caliper up out of
the way.
NOTE: Check the hoses and pin boots for damage
and deterioration.
4. Remove the pad shims, pad retainers, and pads.
NOTE: '96, '97, '99, '00 and 01 models shown.
PAD RETAINERS
INNER PAD SHIMS
Check for weakness.
OUTER PAD
Check for wear.
OUTER PAD SHIM
Check for weakness.
NOTE: Replace the shims together with the pads as a set.
5. Using vernier calipers, measure the thickness of
each brake pad lining.
Brake Pad Thickness:
Standard: 10.5 - 11.5 mm (0.41 - 0.45 in)
Service Limit: 1.6 mm (0.06 in)
'96, '97, '99, '00 and 01 models:
BACKING PLATE
NOTE: Measurement does not include pad backing
plate thickness.
6. If the brake pad thickness is less than the service
limit, replace the front pads as a set.
7. Clean the caliper thoroughly; remove any rust, and
check for grooves and cracks.
8. Check the brake disc for damage and cracks.
9. Install the pad retainers.
PAD RETAINERS
BACKING PLATE
'98 model only
INNER PAD
Check for wear.
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10. Apply grease to the points indicated by the arrows
in the following illustration:
Piston end and inner shim B contact surface
Inner shim A contact surface (both sides)
Pads and caliper bracket contact surface
Outer pad and caliper body contact surface
Outer pad shim and outer pad contact surface
Outer pad shim and caliper body contact surface
NOTE:
Use the pad grease included in the pad set or
Molykote M77 grease, and apply a thin coat of
grease evenly to the designated points.
'96, '97, '99, '00 and 01 models shown.
PISTON
INNER PAD
Apply Molykote M77
to both sides of shims.
INNER
SHIM B
(Stainless)
INNER
SHIM A
WEAR
INDICATOR
OUTER PAD
OUTER
PAD SHIM
Apply Molykote M77
to both sides of shim.
11. Install the brake pads and pad shims correctly.
When reusing the pads, always reinstall the
brake pads in their original positions to prevent
loss of braking efficiency.
Contaminated brake discs or pads reduce stop-
ping ability. Keep grease off the discs and pads.
NOTE: Install the pad with the wear indicator on
the inside.
12. Push in the piston so the caliper will fit over the
pads. Make sure the piston boot is in position to
prevent damaging it when pivoting the caliper
down.
CALIPER BOLT
49 N-m (5.0 kgf-m, 36 Ibf-ft)
PISTON
13. Pivot the caliper down into position. Hold the caliper
pin with a wrench, being careful not to damage the
pin boot. Install the caliper bolt with another wrench,
and tighten it.
CAUTION: Be careful not damage the pin boot
when pivoting the caliper down.
14. Install the brake hose bracket on the knuckle.
NOTE: Inspect the brake hose for interference and
twisting.
15. Press the brake pedal several times to make sure
the brakes work, then test-drive.
NOTE: Engagement of the brake may require a
greater pedal stroke immediately after the brake
pads have been replaced as a set. Several applica-
tions of the brake pedal will restore the normal
pedal stroke.
16. After installation, check for leaks at hose and line
joints and connections, and retighten if necessary.
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Front Brake Disc
Disc Runout Inspection
1. Loosen the front wheel nuts slightly, then raise the
vehicle, and make sure it is securely supported.
Remove the front wheels.
2. Remove the brake pads (see page
).
3.
4.
5.
Inspect the disc surface for damage and cracks.
Clean the disc thoroughly, and remove all rust.
Use wheel nuts and suitable plain washers to hold
the disc securely against the hub, then mount a dial
indicator as shown, and measure the runout at
10 mm (0.4 in) from the outer edge of the disc.
Brake Disc Runout:
Service Limit: 0.10 mm (0.004 in)
10 mm
(0.4 in)
WHEEL NUT AND
PLAIN WASHER
108 N-m
(11 kgf-m, 80 Ibf-ft)
If the disc is beyond the service limit, refinish the
brake disc with an on-car brake lathe. The Kwik-
Lathe produced by Kwik-way Manufacturing Co.
and the "Front Brake Disc Lathe" offered by Snap-
on Tools Co. are approved for this operation.
Max. Refinish Limit:
'96 - 98 models:
21.0 mm (0.83 in)
'99 - 01 models:
26.0 mm (1.02 in)
NOTE: A new disc should be refinished if its runout
is greater than 0.10 mm (0.004 in)
Disc Thickness and Parallelism
Inspection
1. Loosen the front wheel nuts slightly, then raise the
vehicle, and make sure it is securely supported.
Remove the front wheels.
2. Remove the brake pads (see page
).
3.
4.
Using a micrometer, measure disc thickness at
eight points, approximately 45° apart and 10 mm
(0.4 in) in from the outer edge of the disc.
MICROMETER
Brake Disc Thickness:
'96 - 98 models:
Standard: 22.9 - 23.1 mm (0.90 - 0.91 in)
Max. Refinishing Limit: 21.0 mm (0.83 in)
'99 - 01 models:
Standard: 27.9 - 28.1 mm (1.10 - 1.11 in)
Max. Refinishing Limit: 26.0 mm (1.02 in)
NOTE: Replace the brake disc if the smallest mea-
surement is less than the max. refinishing limit.
Brake Disc Parallelism: 0.015 mm (0.0006 in) max.
NOTE: This is the maximum allowable difference
between the thickness measurements.
If the disc is beyond the service limit for parallelism,
refinish the brake disc with an on-car brake lathe.
The Kwik-Lathe produced by Kwik-Way Manufac-
turing Co. and the "Front Brake Disc Lathe" offered
by Snap-on Tools Co. are approved for this opera-
tion.
for brake disc replacement.
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Front Brake Caliper
Disassembly/Reassembly
Never use an air hose or dry brush to clean brake assemblies.
Use an OSHA-approved vacuum cleaner to avoid breathing brake dust.
Contaminated brake discs or pads reduce stopping ability.
When reusing the pads, always reinstall the brake pads in their original positions to prevent loss of braking efficiency.
CAUTION:
Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid does contact the paint, wash it off imme-
diately with water.
To prevent spills, cover the hose joints with rags or shop towels.
Clean all parts in brake fluid and air dry; blow out all passages with compressed air.
Before reassembling, check that all parts are free of dust and other foreign particles.
Replace parts with new ones whenever specified to do so.
Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid.
Always use Genuine Honda DOT 3 Brake Fluid. Using a non-Honda brake fluid can cause corrosion and decrease the
life of the system.
INNER PAD SHIM A
INNER PAD SHIM B
(STAINLESS)
'96, '97, '99, '00 and
01 models:
INNER PAD
WEAR INDICATOR
Install inner pad with its
wear indicator downward.
PISTON SEAL
Replace.
OUTER PAD
PIN BOOTS
Replace.
'98 model only
CALIPER PIN A
CALIPER PIN B
CALIPER BRACKET
CALIPER PIN
PIN BOOT
Replace.
PISTON BOOT
Replace.
PAD RETAINERS
OUTER PAD SHIM
CALIPER BRACKET
Check for cracks.
CALIPER BRACKET MOUNTING BOLT
108 N-m (11 kgf-m, 80 Ibf-ft)
Brake cylinder grease
or equivalent rubber grease.
Silicone grease (Use
recommended grease in the caliper set).
NOTE:
Coat the piston, piston seal, and caliper bore with clean brake fluid.
Replace all rubber parts with new ones whenever disassembled.
After installing the front brake caliper:
— Check for leaks at hose and line joints and connections, and retighten if necessary.
— Check the brake hoses for interference and twisting.
BANJO BOLT
34 N-m (3.5 kgf-m,
25 Ibf-ft)
CALIPER BOLT
49 N-m (5.0 kgf-m,
36 Ibf-ft)
SEALING WASHERS
Replace.
BLEED SCREW
9 N-m (0.9 kgf-m,
6.5 Ibf-ft)
CALIPER BODY
Check for scoring on
cylinder wall.
PAD SPRING
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