SIII Brake Hoses. Metric or Imperial (UNF)

[Lotz-A-Landies]

Hi guys :TakeABow:

Does anyone know if the brake hoses on a SIII have metric fittings or are they still UNF?

Diana

[JDNSW]

The part number is different from the S2a, but perhaps more significantly, the part number changed again from July 1980, which seems to be likely to be a change to metric, although the change could have been from 2a to 3.

Sorry this doesn't really help that much!

John

[Lotz-A-Landies]

Yukky isn't it! :(

I hate the way that the double leading shoes on the front brakes are difficult to bleed. My plan is to use the very early S2a FC system where there is a bracket on the swivel housing and the brake pipe goes to the bottom cylinder and the bleed nipple is on the top. The problem is that the only brake hoses with the correct ends are the SIII ones.

Diana

[Lotz-A-Landies]

So no-one knows whether SIII brake fittings are UNF or were they always metric?

[Phoenix]

I can't honestly say that i've ever checked!

[MarknDeb]

Diana give Dwayne at MR Automotives a call or email, iam sure he will give the answer you want.

mrautomotive - Home (http://mrautomotive.com.au/index.php?option=com_frontpage&Itemid=1)

[dandlandyman]

I knew this'd come in handy one day! Not so long ago I looked at my friend's old 1974 PBR parts catalogue. It listed all the brake hose p/n's and dimensions.

Series 2,2a brake and clutch hoses all 3/8" UNF: H638 - 15-1/8" long; H572 - 15-1/2"; H718 - 16-1/8". One flared end to fit pipe, one end to fit cylinder with copper washer.

Series 3 use a different brake hose on the front wheels 3/8"UNF: H586 - 17-3/8" long; H744 - 14-3/8". Both ends flared to fit pipe. Rear brake hose same as 2as.

Series 3 clutch hose H851 - 7/16"UNF x 10-7/8" long. Flared both ends.

FC brake hoses also include:
- H574 - 2a type, 3/8"UNF x 17" long;
- H847 - 2a type, 3/8"UNF x 15" long;
- H810 - 3 type, 3/8"UNF x 11-3/8" long.

I realize this might be a bit confusing, but I hope it helps.

Dan.
69 2a 88" pet4, 74 3 109" pet4, 68 2b FC pet6.

[rovercare]

They'll be UNF, Rangies changed to Metric brake line fittings in 82, so One would assume likewise for Land rover

[Lotz-A-Landies]

I knew this'd come in handy one day! Not so long ago I looked at my friend's old 1974 PBR parts catalogue. It listed all the brake hose p/n's and dimensions. ....

... Series 3 use a different brake hose on the front wheels 3/8"UNF: H586 - 17-3/8" long; H744 - 14-3/8". Both ends flared to fit pipe. Rear brake hose same as 2as.

FC brake hoses also include:
- H574 - 2a type, 3/8"UNF x 17" long;
- H847 - 2a type, 3/8"UNF x 15" long;

... I realize this might be a bit confusing, but I hope it helps.

Dan.
69 2a 88" pet4, 74 3 109" pet4, 68 2b FC pet6.
Dan

Have beel looking and investigating and even looked at a ex-mil SIII But didn't measure (How stupid). Did you happen to write down the Rover part number that matched the PBR book?
In the SIII do you know if the H586 was for the front of the military extended shackles/chassis?
In the S2a F/C, was the H574 3/8 UNF flares at each end?

I got some SIII hoses from the Kotara place but they didn't know if they were Mil Spec. so am thinking that they are the H744 and am worried on full articulation I may part the hose. :(

I may have to jack up the vehicle so I can get full articulation and measure!

Diana

[UncleHo]

G'day Lotz-A-Landies :)

The current rover Part No. for the front & rear hoses on a series 2a /3 landy is RTC-3353 ,or that was it a couple of months ago :)


cheers

[Lotz-A-Landies]

Thanks Uncle Ho but that confuses the matter even further.

The late SIII & stage 1 at least had fittings for flare nuts at each end while the IIB (and the original fitting on my IIB) had a straight thread and washer arrangement at one end.

Having just braved the mild weather to get one out of the car, the ones I have (marked part number MBH 4503) are the 14 3/8" so the standard chassis type.

I might have to do some algebra and work out the length from the originals. (Would this be the formula: =SQRT((A1*A1)+(B1*B1)) where A1 = SIII length and B1 = the 2" wider track ?)

Dan

From the SIIA F/C ones, can you tell which ones had the copper washer and which had the flare nuts at each end?

[dandlandyman]

I've compared a Series 2 ex-mil 109" to a civvy 109 and my 88" 2a. The hoses are mounted to the chassis in the same places, but the military hoses are about 1 inch longer or so (just rough measuring). The front hose brackets on my 2b are mounted closer to the axle on the bump-stop extensions, which might go some way to make up for the increased ride height and axle width. I found the standard length hose too short for the rear axle, but had another with about 25mm extra length. The Series 3 chassis brackets are differently placed, but about the same distance from the axle as the 2a. I couldn't tell you how the S3 military ones fit, though.

Dan.
69 2a 88" pet4, 74 3 109" pet4, 68 2b FC pet6.

[Lotz-A-Landies]

Thanks Dan

I took a long look at your information particularly the SIII and the FC data and have bitten the bullet.

The standard SIII hoses I bought were 14 3/8" just as you said, so have to assume that the mil chassis ones must be the 17 3/8".

When I look at the SIIA FC info I am hoping that the 17" ones are the front ones for the bracket on the swivel (same as SIII).

Taking all that info and with my calculation that the extra 2" the swivel sits outboard of the chassis adds less than 1/8" to the length I had ENZED make up hoses 18" long which should give me an element of safety. I also had the hoses made with springs to shield the rubber from rubbing. When I fit them this weekend all truth will come to light. :) :)

Once again, thanks to everyone for their assistance! :D

Diana

PS: Slunnie, if you are listening, I did go out and buy a double flaring tool to make brake pipes. Gee it is easy, I always thought it would be two processes. No longer = :confused: