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[Datsun 1200 encyclopedia]

R31 Rear Disc Brake Swap

From Datsun 1200 Club

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Category: Rear Axle And Rear Suspension

You can add rear disc brakes to H145 with a Australia-built R31 Skyline/Pintara setup. Fits over 13" steel wheels.

Contents

H145

It will also fit H150 as H145/H150 housing ends are the same.

Overview

Click each photo to read the comments and find more detail.

Use a Brake Proportioning valve to set the balance. These are large rear brakes.

R31 Caliper bracket modified to fit H145
22645.jpgAlbum 22645
Holes re-drilled for H145 housing pattern

Remove the axles. Cut the axle bearing retainers and remove the axle bearings. Now you can remove the drum backing plate, and but more importantly will be able to fit the adapter over the axles. New bearings can then be fitted.

Lay H145 drum brake backing plate over Adapter, mark the holes to drill
22672.jpgAlbum 22672

Finned R31 caliper bolts to the adapter
22618.jpgAlbum 22618 22620.jpgAlbum 22620

Fit over 13" steel wheels
22619.jpgAlbum 22619

The factory adapter is thin, but adequately strong
10076_4cf2aefa484bb.jpgPost 347550

Fitted to 1200 Coupe
10076_4cf2acdd6c123.jpgPost 347549

10076_4cf2acec2d865.jpgPost 347549

Consider use appropriate shims inside of the caliper bracket to prevent the bearing from moving. The stock H145 setup using shims between backing plate and housing.

Rear Caliper
18391.jpgAlbum 18391

Handbrake Considerations

Not this:
9665_4cf0ca67db5f0.jpgPost 347474

Fit the calipers facing forward so you can run the cables back and loop around and utilise the existing hand brake bracket and cabling on the diff.
9665_4cf1f6a57c85e.jpgPost 347499

You can use one of the R31 cables to do the RH side but the LH side is not the correct length. Have a brake shop make a new cable or mix-match at the wreckers
10076_4cf2acfc5bda1.jpgPost 347549

10076_4cf2ad1229ff3.jpgPost 347549

10076_4cf2aecee320d.jpgPost 347550

10076_4cf2aee4a208c.jpgPost 347550

10076_4cf2af0f01464.jpgPost 347550

H165

R31 rotors on H165 ute axle housing
P3290804.jpgPost click for topic

GM calipers fitted (for a handbrake-less setup). Commodore VK rear calipers are same as Australia-assembled Skyline R31 calipers -- but without the external fins of the R31 caliper which limit rim selection.
P3290803.jpgPost click for topic

R31 brakes to H165? Mockups:
10951.jpgAlbum 10951 11018.jpgAlbum 11018 11019.jpgAlbum 11019 11020.jpgAlbum 11020 

¤

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This page has been accessed 13,329 times. This page was last modified 23:54, 31 July 2018. Content is available under Datsun 1200 Club.