Fitting a Servo to a diesel 2.25 ?

[dsj1979]

Hi,

I've just bought a diesel landrover. This doesn't have a servo fitted and I would like to give the brakes a little bit more stopping power. How easy is it to fit a servo and find a way for the vacum? I have been searching the forums, I also see some people suggesting that a peugeot alternator driven vacum pump has been fitted before???

Hopefully you can help

Thanks,

Daniel

 

[TEMPL4R]

Go down a breakers and have a look at some Diesel cars and vans.

Some have the pump at the rear of the alternator, so it's pretty much a straight swap. Some have the pump at the front, so the mounting is too far forward and the pulley is out of line.

Try a Transit, Peugeot 504, Sherpa, any older stuff and look for a Bosch.

A lot of modern Diesels use the pump drive off the end of the cam shaft.

Chris

 

[Daz800]

If you can find a rover p6 servo then grab it.
The p6 servo can be fitted anywhere you like and i have fitted these brake servo to various cars, never to a derv (fitted one to each wheel to a mini once).
Very easy to plum in.

Darryl

 

[dsj1979]

Go down a breakers and have a look at some Diesel cars and vans.

Some have the pump at the rear of the alternator, so it's pretty much a straight swap. Some have the pump at the front, so the mounting is too far forward and the pulley is out of line.

Try a Transit, Peugeot 504, Sherpa, any older stuff and look for a Bosch.

A lot of modern Diesels use the pump drive off the end of the cam shaft.

Chris

Thanks for the replies. Do the transit, peugeot 504 or sherpa require an oil feed that you know of?

I used to live half a mile from a breakers yard....... now the nearest is probably about 30 miles away, it was nice when I could pop down whenever I wanted to have a look around.

 

[glenanderson]

Some Sherpas and Peugeots use a Pierburg vacuum pump that is belt driven and requires no oil feed. That.s the one you're looking for. Best way to describe it is it looks a bit like a gas bottle regulator - round and flattened diaphragm housing - with a pulley and inlet/outlet pipes.

Doesn't matter which way you rotate them - I got a couple,with brackets, from the scrappy. Modified the bracket to fit on the timing cover - there are two cast in "lugs" on the cover that are ideal mounts - and used a P6 servo. Use a military double pulley on either the crank or waterpump (or both) to drive it.

P6's are a bit thin on the ground in breakers these days though... Might be better to source a complete pedal/servo/master-cylinder unit from a scrap series III, or a new remote servo from a mini or MGB specialist. Don't bother with boost ratios above 2:1 as it makes the brakes very on/off. MGB place on ebay is offering 1.9:1 remote servos for under £100 which is good value.

Whatever you do, don't waste your time with the factory system for generating the vacuum - the butterfly on the inlet plenuim and remote reservoir. It's hideously over-complicated, akward to set up, can badly affect crank-case pressures and cause smoking and high oil consumption if badly set up. Much easier to use a pump.

 

[TEMPL4R]

A lot do, but it's easy enough to tap a feed from the oil gallery and put a drain in.

As Glen says, you can get a diaphragm type pump. Have a look at the various vehicles and see what you can find.

Chris

 

[bob86]

This is what a diaphragm pump looks like. I got this one from either a 504 or a 400 series sherpa.

 

[dsj1979]

Great, at least I know what I'm looking for now. I'll have a search around for some sherpas.....

What scrapyard did you goto Glen the only ones I've heard of is in Sandwich or Deal? I only live in Beltinge. And... do you know any green lanes around here?

 

[glenanderson]

Hi, I'm afraid Sandwich or Deal are the only ones left locally. I got mine in the yard in Canterbury before it closed.

Don't know of any local lanes as it's not my thing, sorry.

All the best with your scrapyard search, Glen.

 

[rusty_wingnut]

don't some 2.25 have vaccumes on them for the later series that have vaccum brakes?

 

[dsj1979]

Whatever you do, don't waste your time with the factory system for generating the vacuum - the butterfly on the inlet plenuim and remote reservoir. It's hideously over-complicated, akward to set up, can badly affect crank-case pressures and cause smoking and high oil consumption if badly set up. Much easier to use a pump.

Yep, that's what this was referring to. I've heard lots of problems regarding the factory system for diesels as well.

 

[theBaptist]

here dsj have a look at my set up for some inspiration

my '77 SIII did not come out with power brakes, a friend of mine had a later model (i believe '81 but not sure) he was taking apart and i bought the servo / pump off him. putting it in place was a piece of cake.

off came my unit including brake pedal and in went the servo uit complete with reservoir, pedal and all ... but fiddly getting it in place, you need help.

i am not sure if the pump (belt driven, no butterfly vacuum here hehe) came of a LR or from a donor car (well it was on HIS LR but i assumed, after seeing this thread maybe incorrectly, that it was from a LR).

pump came with a special bracket that just replaced the bracket where engine can be lifted from.

one pipe goes to servo and the other (exhaust ? ) is directed vertically down.

new bigger fan belt and ready massive difference, i could finally use just one foot to brake instead of both feet and right hand haha ..