Chapter One in Kansas City area has one of these units.
I've just got it all vleaned up but have not started on the box of special tools as of yet.
Bill Walter

Seems the pics I put in posts 2&3 have dissapeared so will repost them.They were there when I put in post 4!
These are S/M April 28 1961. To get bigger pics in Windows I can enlarge them by going to the Page Icon in the lower right end of the top boxes and go to Zoom function and up size to 200%, hope you can do this too.
Cheers
Eddie B.

S/M April 03 1953

Hi Bill Walter,
Did you recently acquire the test unit, say in the last six months? Maybe you were the lucky bidder.

Hi edb,
Like that $17.00 price....
The last time I checked...in Dec. /05 the 3H1690 was still available @@@@@$$$$$$$334.28

yes OM the old prices are enticing at today's rates but it was all relative to the weekly wage then as now. I recall paying $20 for my 1 1/2" open end/ ring spanner way back when and it was half a weeks wage! My Cat tool box was one weeks wages, $78!, special reduced price.

Will go to Dealer and look in the Special Instruction Sheet for test specs for capsule nozzles.

What data do you require for pintle/flat seat nozzles?, the SI covers O/H of these also. I used to do all of these up to when I retired. The Diesel 50 I am helping on has 2 pintle nozzles in it!!! these are the only Cat ones I have encounterd.

The curvature of the nozzle to valve body and needle tip concave, I determined to be the same convex/concave of a sphere (ball) of 5" diameter. For this I cut pieces of cardboard at various radii (2 1/2") until I got a match to the Dealers reconditioning kit laps, which I believe is no longer serviced by Cat.
Will start another thread for these in due course.
Cheers
Eddie B.

OM, that test stand is the same as the one at a dealer I worked for a few years ago. It was an antique then, but we still used it once in a while. It was different!

This is the specs we went by at the dealer for them & new is 700 lb. & used when they got much below 500 lb. we usually replaced them with new nozzles.

Thanks all for your responses:)
edb,
I don't have a specific need for the pintle/flat-seat injectors. I have plenty of info on the flat seat type but nothing on the pintle version and have never even seen one. Was just curious to see what they looked like and what they were all about.
Also the info I have is strictly from books and manuals and never had the opportunity to hear about them from someone that actually worked with them.

Hi OM,
the pintle nozzle is like any CAV-Bosch pintle, but in the same "Flat Seat" body etc.. From external you would not tell it from a standard unit except for the Pintle needle tip protruding the seat plate. I believe looking at the early Cat Fuel System parts they seem to be of Bosch origin.
Leffingwell in his book, CATERPILLAR "Farm Tractors, Bulldozers & Heavy Equipment", pages 101-2, also mentions this and Cat went on to build their own systems for many years.
Attached :- VOP specs. The needle lift adjustment for all Cat pintle and flat seat nozzles is 0.007".
Attached :- Pintle type nozzle scan.

Hope this helps,
Cheers,
Eddie B.