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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