1964-74
Javelin Rebel AMX American Rambler Ambassador Front Disc brake conversion
1.
Safety first.
Use all normal safety precautions.
2.
Crack front wheel nuts loose,
chock up rear wheels.
3.
Jack up front end of car,
support with jackstands. Remove
front wheels, drum assembly.
4.
Disconnect brake flexible line
at frame by unscrewing hardline nut, then removing clip.
Undo drum backing plate nuts and remove drum backing plate and all drum
hardware in one assembly. Clean off spindle assembly
5.
Place adapter plate on outside
of spindle stub, with caliper opening to the rear and caliper mount nut welds
facing inwards. Check to make sure
bracket fits flat against stub. On
1-1/4 thick base stubs, rotate stub 180 degrees so it fits inside bracket.
Tighten nuts to spec.
6.
Place machined spacer on
spindle stub with taper inwards to clear spindle fillet.
If it fits loose, use LockTite Red to retain if tight fit, heat
spacer in oven to 450 degrees and place on stub.
7.
Dry fit rotor onto spindle
stub. Check for interference of
rotor with lower ball joint. Some
OEM pieces have a little tongue that hits the rotor; this must be ground
back approximately 1/8. If
all is well, clean and repack wheel bearings, install inner bearing in rotor.
Install new seal. Assemble rotor onto spindle, tighten outer nut to spec, then
secure with keeper, new cotter pin and Ranger dustcap.
Install larger rings on rotor, these center the rims.

8.
Wipe down rotor with alcohol,
lacquer thinner or other cleaner to remove grease and oils.
9.
Wash hands! Rotor must be squeaky clean
10.
Assemble pads into caliper,
lube contact points with silicone grease and slide assembly into caliper
bracket, then screw in slide pins, tighten to 35 foot-pounds.
Check fitment and rotate rotor to check clearance.
11.
Measure optimal hose length
with a piece of fuel line. We found
routing the hose down from the caliper then up to the hardline, forming a
J worked best. We used 1979
Seville front hydraulic hoses which are 15, but 12 may work better. Install hose with new copper crush washers.
12.
Master cylinder and
proportioning valve specs are quite varied.
I would recommend 1968-74 Javelin or similar disc master cylinder for
best performance match available in power and manual flavors.
Try with original junction block first.
If rears lock up excessively, install an adjustable proportioning valve
in the line going to the rear. The large rings are for centering the stock rims
on the rotors.
13.
Bench bleed disc master
cylinders, mount on car,
then gravity bleed entire system first, and then pump bleed and test.
Bed in pads by 30 slow stops from 30 MPH, with 30 seconds cooling between
stops.
Part
Application
NAPA
Wagner
Raybestos
Rotor
1995-97 2WDRanger w/2 wheel ABS
(48)86672
BD125469
66559(RGS)
Caliper,
LH
1990 Celebrity front
442-2066
TQM25006
RC4233
Caliper,
RH
1990 Celebrity front
442-2067
TQM25007
RC4234
Hoses
12 long 1979-90 Caprice front
36846
F106887
BH36846
Hoses
15 long 1979 Seville front
36845
F98912
BH36845
Oil
Seal
1995-7 2WDRanger front
19223
BCA #9150S
Banjo
Bolt
1990 Celebrity front
82703
DORMAN Part # 13940
Inner
Bearing
1995-97 2WDRanger w/2 wheel ABS
BR5
BCA A5
Outer
Bearing
1969 Javelin
BR2
BCA A2
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