× 1-800-946-2642 Home My Account Social / Forum Articles Contact My Cart
Shop Now
Select Your Car Type Sale Items Clearance Items New Items
Save today on selected Deves piston rings
 

 Hydraulic Brake Light Switch Threads

 Created by: Cup Cake
   Forum Width:     Forum Type: 

 Posted: Nov 5, 2015 03:52PM
Total posts: 10330
Last post: Jan 27, 2021
Member since:Dec 3, 2002
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
US

The one for Innos that mounts up near the bulkhead is not the same as the one that mounts above the right front hose.

 Posted: Nov 5, 2015 03:41PM
Total posts: 440
Last post: May 2, 2017
Member since:Sep 24, 2013
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0

I ended up buying this from Amazon (our brake switch is very similar to some Harley bikes) //amzn.to/1Hv5rKO

Works like a charm.

'73 Innocenti Mini (non-export)

Morristown, NJ

 Posted: Nov 5, 2015 03:14PM
Total posts: 10335
Last post: Aug 19, 2016
Member since:May 13, 2001
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0

Thanks DR. I'm losing hydraulic fluid somewhere in the brake system and I suspect the switch because I just changed it. I'm reasonably sure the switch had pipe threads but if it didn't it would leak. I have another one that does not seem to be a pipe thread fitting ie its not tapered. If the switch bottoms out in the banjo bolt do you think I could seal it with a washer?

The power of accurate observation is commonly called cynicism by those who have not got it. G.B.S. Sarcasm is the lowest form of wit. Oscar Wilde

//www.cupcakecooper.ca/

 Posted: Nov 5, 2015 02:13PM
 Edited:  Nov 6, 2015 02:34AM
Total posts: 8645
Last post: Dec 16, 2020
Member since:Oct 27, 2000
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0

Nope, they are 1/8 BSP (British Standard Pipe, parallel). Which is slightly smaller and 1 tpi different to NPT.

Run a BSP dienut down an NPT one and it'll be fine.

BTW I bought a Mini one last month, in a Lucas box. No idea if better quality than the poor cheapo ones. It's now on my brother's Hillman Imp, if it dies soonish I'll say so.Foot in Mouth

[edited] for clarity

Kevin G

1360 power- Morris 1300 auto block, S crank & rods, Russell Engineering RE282 sprint cam, over 125HP at crank, 86.6HP at the wheels @7000+.

 Posted: Nov 5, 2015 12:39PM
Total posts: 10335
Last post: Aug 19, 2016
Member since:May 13, 2001
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0

Are the threads on a hydraulic brake light switch NPT? Could I get away with using a NF thread switch and a copper sealing washer. 

The power of accurate observation is commonly called cynicism by those who have not got it. G.B.S. Sarcasm is the lowest form of wit. Oscar Wilde

//www.cupcakecooper.ca/