Hi all,
I'm new to the Forum, and indeed to Land Rovers, and no mechanical genius either. So please go easy on me. I checked through loads of threads here but haven't really found anything that would fit my scenario.
The problem I have is the rear drum brakes on my Ninety. I'm down here in Uganda, with spares and knowledgeable mechanics hard to come by, and Landies that are patched together from ten different models, which makes things rather difficult.
My 90 is (in theory, at least) a 1989 build (VIN FAxxxxxx) that keeps jamming the rear drum breaks, and everybody is at a loss as to why. There is a theory that it may have to do with wheel cylinders that are slightly too large. I have been googling my eyes out but can't seem to find any real evidence of a change in wheel cylinder size, even though spares sites differentiate between cylinders up to VIN VIN HA701009 and after, indicating that there was a change in design somewhere in 1991.
Trouble is that the pictures look pretty identical to me, and there are no dimensions/specifications given on any site.
I also can't be sure if my Landy indeed uses original-sized cylinders and drums from 1989, or has been retrofitted with some later Defender stuff.
Other details:
No original replacement shoes could be found anywhere in Kampala, so lining was bonded on to old worn shoes. Doesn't seem to be too high though.
Smaller wheel cylinders (if they exist) couldn't be found either, so mechanic shaved off 2 mm of the top bit of the shoe, where it slots into the cylinder. No jamming now when cold, but after 6 miles it all heated up, brakes jammed to the point that the engine almost overheated and you could fry eggs on the rims.
So:
1. Does anybody know what the difference, if any, is in size and/or design between pre-HA701009 wheel cylinders and post?
2. Does anybody know which is the drum diameter of Series and Defender models? Since my Landy is sitting with the mechanic and I stupidly forgot to check I can't be sure, but I think my drum diameter is 10.3 inches. Is that possible? Do later models use the same drum diameter or a larger one (which would go a long way)?
3. Any idea that may spring to mind is greatly appreciated.
Cheers!
I'm new to the Forum, and indeed to Land Rovers, and no mechanical genius either. So please go easy on me. I checked through loads of threads here but haven't really found anything that would fit my scenario.
The problem I have is the rear drum brakes on my Ninety. I'm down here in Uganda, with spares and knowledgeable mechanics hard to come by, and Landies that are patched together from ten different models, which makes things rather difficult.
My 90 is (in theory, at least) a 1989 build (VIN FAxxxxxx) that keeps jamming the rear drum breaks, and everybody is at a loss as to why. There is a theory that it may have to do with wheel cylinders that are slightly too large. I have been googling my eyes out but can't seem to find any real evidence of a change in wheel cylinder size, even though spares sites differentiate between cylinders up to VIN VIN HA701009 and after, indicating that there was a change in design somewhere in 1991.
Trouble is that the pictures look pretty identical to me, and there are no dimensions/specifications given on any site.
I also can't be sure if my Landy indeed uses original-sized cylinders and drums from 1989, or has been retrofitted with some later Defender stuff.
Other details:
No original replacement shoes could be found anywhere in Kampala, so lining was bonded on to old worn shoes. Doesn't seem to be too high though.
Smaller wheel cylinders (if they exist) couldn't be found either, so mechanic shaved off 2 mm of the top bit of the shoe, where it slots into the cylinder. No jamming now when cold, but after 6 miles it all heated up, brakes jammed to the point that the engine almost overheated and you could fry eggs on the rims.
So:
1. Does anybody know what the difference, if any, is in size and/or design between pre-HA701009 wheel cylinders and post?
2. Does anybody know which is the drum diameter of Series and Defender models? Since my Landy is sitting with the mechanic and I stupidly forgot to check I can't be sure, but I think my drum diameter is 10.3 inches. Is that possible? Do later models use the same drum diameter or a larger one (which would go a long way)?
3. Any idea that may spring to mind is greatly appreciated.
Cheers!