Hello again.
Today I am trouble-shooting a limp brake pedal and have identified the problem as adjustment in the rear brakes (thanks John for this informative post from some years ago:
Urgent help needed bleeding series 3 brakes.).
I am fully expecting that the previous owner has not used the correct parts and am seeking clarification.
For starters, the wheel cylinders don't come up in a Google search - Protex AR-80 and AR-81.
Protext AR-81.jpg
This looks like very early Series II which used a Rover car slave cylinder, the cutout is for the handbrake mechanism on the Rover.
Protex has its own recommendations for my vehicle (although I am confused why they have listed options for both 31.75mm and 25.40mm?).
Next are the shoes. The workshop manual diagram shows far more lining on the shoes. These shoes don't have much at all. And, according to this website -
Land Rover FAQ - 109 rear brakes - they are on the wrong way around – with the leading shoe supposed to have a larger gap between the tapered top and the start of the lining.
This is important because the pins in the shoes for the adjusters used on the later models are in different positions for leading & training shoes. Not so relevant because your adjuster is at the end of the shoes.
Linings on shoes.jpg
According to this website, if that are on the wrong way, they won't adjust.
Trailing shoe.jpg
The adjustment is strange insofar as turning the screw in an out will adjust out and then in again (rather than a steady rate of adjustment).
The later Series II's use individual adjusters for each shoe. It's not a steady rate of adjustment as there are a series of flats on the 'cam', as you turn it moves the shoes out, then back a bit as it settles on a flat.
Adjuster.jpg
And then there are the drums themselves - deeply scored. Can I have them machined? Or do I need new ones?
Depends if they have been machined before, there is a maximum diameter they can be machined out to.
Drum.jpg
Advice on all these issues would be appreciate before I go any further.
What can I salvage, what new bits do I need?
Thanks.
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