These calipers are a direct bolt onto the mk1 hub. the disc used is a 280x28 celica 185 vented. The discs need a p.c.d of 4x100 driling only, otherwise, a direct fitting kit.
ok, anyone needs the info on a caliper build, its a very simple task to do, ive written it to cast any doubts away; easy & and quite cheap supringly using oem toyota parts. here is what you need:
single piston rebuild kit (boots and gators / clips / bits) :
04479-20160 £31.76
and if needed: pads; optifit pads (toyota crossbreed) # 04465-YZZAG £ 28.36
caliper laquer around half litre (small) tin, halfords. £10
excluding paint, a total of £60.12 for a smooth working set including new pads, not bad atall.
the calipers I cleaned and painted previously, using normal stuff, wire wheels in a drill, angle grinder for tuff stuff, clean with brake cleaner, sand exterior only, wash bores, buff bores with soft cloth only, paint exterior. The piston and guide pins, i stuck on the lathe and hit them with polishing compound, although just a thourough clean & polish with old pair pants needed etc. job done. they will get a further paint touch up when fitted for good, but paint this before building, otherwise you'll paint your gators.
all this stuff bar the calipers & pistons & runners comes with the kit:
make sure bore is clean, wip with brake fluid. take piston seal, wipe all over with brake fuild, insert in groove in bore:
take piston, wipe all over with brake fluid, insert in bore squarely:
push the piston right back:
fit piston gator into top groove of caliper bore, and push gently over top of piston until it sits in the groove. Then take retaining ring and insert onto piston gator , it will pop into caliper groove easily, retaining the rubber gator.
take guide pins (runners) make sure they are shiny clean, and lubricate with pink stuff (grease) provided, smear liberally over all the pins, avoiding any large amount in the grooves.
stick some pink stuff down the guide bores followed by small finger and spread over all of bore:
take new boots, and grease the ends which go into the caliper, these boots pop into the caliper holes easy, stick finger inside to make sure through hole is clear, and rubber from boot is not blocking guide hole.
lubricate front entrance to gator, stick guide pin in front ways and through the caliper, then out other side. bit tricky getting the pin in, no big bother, stretch hole round pin first, grease etc.
make sure holes in caliper bridge (part of caliper which holds pads) has clean threads. for reference these threads are :
M10x1.25 for the guide pin retaining bolts
and M12 x 1.25 for the caliper to hub mounting holes.
i ran a tap thru the holes just to clean the crap out. (picture, pre tap)
take caliper bridge and put into position
take guide pin bolts, smear with copper slip grease or similar, insert bolts and do up.
put pad spring clips into caliper bridge & caliper:
mount new pads:
copper crush washers forcaliper banjo fitting left to fit and caliper bleed screw caps left to fit after bleeding. job done.
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