Vacuum tank mystery

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Rolo

New Member
Posts
2
Hi everyone,
New to LandyZone so here goes.

I have recently purchased my first land rover, 1968 2a 109 with full canvas roof, with the intention of returning it to something like its former glory. It is in daily use and appears to be all original with the exception of some additional vacuum equipment.:confused:

The inlet manifold has been drilled, and presumably threaded, to accept a fitting which is connected to a 1" rubber pipe which passes through the nearside inner wing and is connected to a 20" X 8" diameter cylindrical steel tank mounted in the wing above the front wheel.
A second 1" rubber pipe connected to this tank runs to the rear of the vehicle and terminates in a fitting/connector mounted on a bracket near the tow hitch. This fitting has a centre plug which I can rotate through 360 degrees but I can achieve no other movement, I suspect this is some kind of bayonet type fitting but being unsure I do not want to force it.
A third rubber pipe 3/8" diameter comes form the tank to a Feeny & Johnson ( Wembley ) vacuum guage on the dash calibrated in [ in/Hg], which I believe is inches of Mercury as used in old barometers.

The whole installation has been done very professionally and the fixings, fittings, brackets and clips appear to match as if the whole apparatus were supplied a kit also I believe it to be still in working order as the guage shows between 20 in/Hg to 25 in/Hg depending on engine speed. I think this was fitted some considerable time ago as all fittings are clearly imperial sizes and given the accumulation of solidified grease oil and dirt around everything it is possible that it could have been fitted when the vehicle was new.
Can anyone shed any light on what this is and what it might have been used for?
Cheers :)
Rolo





 
Thanks for replies.
Fair comment about pics will put some on, don't know if it is ex-military, no history except tax discs form 1986 and all details correct on V5
Thought it might be for trailer brakes so will try to find out if I can adapt my trailer to use it.
 
Would doubt it, if you don't have a trailer with grossweight>3.5 tonnes. No need to, either.
I'd love such a system for mine, as it's registered as Lorry in Krautland anyway. Would boost me max trailer weight from 3.5t to somewhere the engine can't cope with even at 20mph.
 
one of the dairies used to run some landrovers as recovery vehicles in the 70's. they would send out a landy and trailer to recover broken down electric milk floats. because of the weight with the batteries etc, the trailer had to be braked, and they had air brakes.
 
Rolo,
I've just bought the servo (on ebay)that you may still have somewhere on your LR.... So I'm interested in how, what you have, is fitted... The arrangement was for vacuum brakes, as I've found an article describing the bits, but not how it was fitted or operated,
Regards,
2b or not 2b
 
if it was vacuum brakes for a trailer it would need some sort of valve connected to the landrover brakes. to regulate the vacuum from the tank to the tailpipe . if it was designed for recovering something that just needed the brakes releasing to move it it could work on a constant vacuum at the tailpipe.

as an aside 15 inches of mercury is about half atmospheric pressure
 
Rolo,
I recently bought a Feeny & Johnson trailer brake servo thingy (Nov 2010) on eBay..... Found out a lot about it, I know who took over from F&J etc, If your still interested I can update you..??
Regards, 2b or not 2b
 
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