Nissin Kogyo brake servo on GT6/ 2500

[bob5513]

Hello!

I have a leaky brake servo. I took it out and it is made by 'NISSIN KOGYO'

Type: NM 165V-1 There seems to be no information on the web. I contacted Nissin Kogyo Ohio but I got a generic email back and can't find any dealers in the UK.

My query is, I obviously need to repair or replace it with something similar. My car isn't standard and I have just got back from travelling the world for 2 and a half years (and am yet to find a job again) so buying a complete new system would be my last option.

Car is a 1972 GT6 with Spitfire soft-top conversion. It also has a 2500 Triumph engine with a few other differences like a Celica gearbox. The brake master cylinder is a dual type and works well. The studs on the servo to join it to the master cyclinder are 60mm apart.

Whoever made this concersion had to cut away part of the bulkhead and extend the operating arm from the brake. To be honest it is a bit of a pain having all these 'modifications' when they need fixing! The studs on the back are 60mm apart vertically and 100mm apart horizontally (4 studs) to fix to the bulkhead and there is one vacuum inlet pipe (no check valve?).

However, if possible I would like to keep the dual brake system. Can I politely ask...

1) are there any replacement servos that I could just switch over that would fit my master cyclinder (2 holes 60mm apart)? This would be the easiest. It looks a bit like some of the triumph servos but the measurements may be different.

2) Can an unknown brake servo like Nissin Kogyo be repaired if there is no 'off the shelf' repair kit (I would find a garage to do this around Bedfordshire area if so).

3) Should I go back to another plan - all welcome - that is as cheap as possible to do but will give the best braking (I have read a few options on the forums like one or two remote brake servos etc. - I assume I would then need a new master cylinder too??)

I will try to take a photo perhaps.

thanks so much!!

Rob Larman

This will be my first major 'brake challenge' so please ask for any information that I may have missed or that doesnt make sense. I'd really appreciate your input as I am a little stuck as what to do next.

[Jason]

The chances of you identifying a non-Triumph servo on a Triumph forum are pretty slim, you might get lucky so don't stop trying :-)

If I were you I would find a friendly motor factors and take the servo to them and see if they can identify it's origins. Meanwhile you could try researching the manufacturers annual reports and public documents to see if they mention which vehicle manufacturers they supply to.  A quick Google shows up that they were at one time associated with Honda.

Everything can be repaired but at what cost? Often it's more economical to start again from a known source.

[Tim Bancroft]

Any photos?

[rustbuckit2011]

Yeah, like Jason points out, the prefix NM appears to be Honda.
I'd be tempted to take it down to the local honda wreckers and see how close of a match you could get. It's just a hunch, but I would guess that less science and more "she'll be right" went into the decision to use that particular booster- so another the same size and mounting would probably work about the same.
May be worth a try anyway

[Bainzy]

Could you just ditch the servo? New Triumph type tandem master cylinders are about £50 on ebay which would let you keep the dual brakes.

All the servo does is make the pedal softer to push, it doesn't actually increase braking effectiveness. It adds complexity and things to go wrong, and adds extra weight to the car.

Having recently rebuilt my rear brakes and front brakes, all with new standard parts apart from Mintex pads, I can't fathom at all why people would want a servo. The brake pedal on mine starts to work immediately after pressing, and it hardly takes any pressure at all to get the car to slow down and stop. I'm not sure I'd want to feel less resistance on it as the feedback from the pedal enhances the driving feel, but then again that's just my preference.