GMC chevrolet camaro 2000 Service Manual page 554

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Brakes
Rear Rotor Finish Cut
Spindle Speed
Depth of c.ut
Cross Feed (per rev.)
Vibration Dampener
Rotor Mounting Adapter
Tools Required
105 rpm
As necessary
0.08 mm (0.003 in)
Yes
..
• J37160-A Rotor Mounting Adapter
" J 37160-50 Rotor Mounting Adapter Sleeve
Important: Verify that the mounting surfaces of these
components are clean arid free from nicks, burrs
or rust.
1. Inspect all of the mounting hardware for the
following conditions: ·
• Rust
• Nicks
• Dirt
• Abnormal wear
For proper results, ensure t.hat all components ·
are in good condition and clean.
2. Inspect the rotor:
• Measure the lateral runout. Refer to Brake
Rotor Lateral Runout Check.
• Measure the thickness variation. Refer to
Brake Rotor Thickness Variation Check.
Ensure that the mounting surface of the rotor
is clean and free from rust and nicks.
3. Mount the J 37160-Aon a spindle arbor.
O
Use a suitable combination of spacers or
collets in order to tighten the J37160-A
to the arbor.
O
When using lathes with a 7 /8-inch spindle
arbor, use the J 37160-50 with the J 37160-A.
e
The J 37160-50 is not required with lathes
using a· 1.,-inch spindle arbor.
Notice:
Refer to Fastener Notice in Cautions and
Notices.
4. Mount the rotor onto the J 37160-A
• Mount the clamp plate to the rotor using the
enclosed bolts/screws.
• The rotor may be installed and removed while
the J 37160-A is mounted on the machine
spindle.
Tighten
Tighten the rotor mounting adapter nuts in
a cross pattern to 34 N-m (23 lb ft).
Disc Brakes
5-81
5. Install the anti-chatter silencer onto the rotor.
6. Set the spindle speed to approximately 150 RPM
(or mid-range).
7. While the machine is running, bring the tool bit up
and touch off.
" Stop the machine .
• Inspect the witne.ss mark. If the witness mark
goes% oft.he way around, the rotor is
mounted properly. · · ··
• Continue turning the rotor using normal
methods in order to resurface the rotor.
8. If the witness mark does not go % of the way
around, repeat the above steps.
Nondirecticmal Finishing
Ensure that the rotor surface is nondirectional by
dressing the rotor surfaces. Use a non-directional rotor
finisher such as the
54-433179
Non-Directional
Rotor Refinisher listed in the GM Dealer Equipment
Catalog, or a suitable equivalent.
If the brake lathe is not equipped with an adequate
nondirectional finishing tool, use a sanding block with
150 grit aluminum oxide sandpaper.
After the rotor has been sanded, clean each surface
with denatured alcohol or a suitable brake cleaner.
With the rotor turning atthe equipment manufacturer's
highest recommended cutting speed, sand each
rotor surface for a minimum of 60 seconds using
moderate pressure.
Important: Replace any rotor that does not meet the
minimum thickness specification recommended by
the manufacturer. Do not resurface new brake rotors.
New brake rotors are manufactured with the proper
surface finish.
The finished rotor surface should be as close as
possible to that of a new rotor. Failure to obtain the
best possible rotor finish may affect braking
performance.