posted December 14, 2007 18:52               

Please can someone give me the length of the bolt that screws into the little black hole in the image just to the left above the proof meter cable connection. I am afraid to screw any bolt in as I don't know what damage I could do.

Kind regards
Mervyn

posted December 14, 2007 21:03               

That is a banjo bolt and has a "pigtail" pipe attached.I have done a quick check of the parts book and can not see it but I think you will find it is the same as the injector leak off ones that fit into the top of the injectors.

posted December 15, 2007 08:27               

Thanks for the speedy reply, you are really a "Fundi" on your "Blues". I had another look at my workshop manual and there it was banjo bolt and pipe. Strangely though my pump did not have the pipe so I have no idea what was there initially. Could it have just been a 5/16"bolt or plug of sort?

I also took the liberty of looking up in the Dexta Parts List which I down loaded some time ago and again strangely the leak off pipe is not shown.

I will make an effort to find a banjo unit complete and fit it.

Thanks again for your assistance.

posted December 21, 2007 00:42               

Sorry for the interuption

posted December 21, 2007 06:40               

Thank you very much for the compliment. I'm slowly getting there with my restoration, been slow but enjoyable. Hopefully I will be able to post a more complete picture soon.

Have a Merry Christmas and fun filled 2008.

posted December 26, 2007 16:38               

Thanks for the offer of the banjo bolt especially the Blue One. After sending off my last post I phoned up the repair shop that rebuilt my pump about two years ago and asked him if was important to have the leak off pipe at all, and his reply was no, as it is important to change the oil in the pump when you carry out a engine oil change. So what I did was screwed a short bolt with the correct thread in and let it be. Not sure if the boys with the know will agree with what I have done.

Kind regards
Mervyn

posted December 26, 2007 17:25               

I am afraid I would seriously disagree with your diesel shop. In fact I would question their knowledge of Simms/CAV pumps.

All Minimec pumps are lubricated by diesel which is allowed to leak into the cam box area. Some of this diesel bypasses the front seal, again it is allowed to, and enters the governer housing, mixing with the oil in there. This level will build up and dilute the oil and can slow down the operation of the governer weights. This is why you have to change the oil in the pump.This oil has nothing to do with cam box lubrication it is purely for the governer unit.

Diesel will also build up in the cam box and the cam box needs to breath. Both these functions are carried out through the leakoff tube and excess diesel is allowed down the tube and onto the ground.

The leakoff tube has been a feature of Simms pumps for many years prior to the Minimec and you may see tractors at rallies which drip a small amount of diesel through this tube. This is normal. To blank it off is not something I would advise or do.

posted December 27, 2007 21:25               

Rob
I might just have to take you up on your offer of that Pretty Blue banjo thingie. Should I not be able to find one I will email you. Thanks for the offer.

posted December 29, 2007 01:01               

Thanks for the help.

posted December 29, 2007 09:55               

I have the banjo here waiting,with the pigtail attached.
I will include the bolt,which is kinda special since it has a groove lengthwise.
Also i will include two copper washers.
You may only need one,mine was mounted with only a washer under the bolthead,but you never know...

posted December 29, 2007 09:59               

Like the Major,some Dexta's were fitted with the Simms Minimec pump. All Super Dexta's had the Minimec from day 1 and the Dexta changed to the Minimec around 1963.

The Minimec is the pump that needs oil in the mechanical governer housing to lubricate the governer weights.

posted December 29, 2007 11:11               

Thanks for the offer again, I will contact you on your email.

posted January 23, 2008 21:40               

Again I must thank Rob for sending me the leakoff pipe complete with bolt and washers at absolutely his own cost. so Rob one day when you visit South Africa or visa versa I owe you a couple of drinks.

Kind regards
Mervyn