Fuel pumps for Ranger engines

[cliffmccluney@webtv.net]

'I have a "used" pump off of a run out Ranger engine that has no data
plate. There are two sets of numbers stamped on the casting: 1. RB
4360-4B and 2. F-1772-A

It has 4 main ports, 2 plugged, and 2 shaft drain ports, plugged.

The shaft has 11 splines and has an internal flex joint of some type.

It is of sliding vain design with small pin type vane ends which are
flat on one side to mate with the outer elliptical case.


The PT spec sheet lists approved pumps to be: Pesco 227-D and an F-10
(unmentioned mfg.)

Questions:

1. Since this is a positive displacement pump how was regulation and
bypass accomplished?

2. Did any of these type pumps have built in regulators? If so, was
there a diaphragm that could rupture?

3. Did Ranger ever use any type of diaphragm pumps like our modern
engines use?

Would appreciate any comments. I am working up a training session for a
group of interested PT-19 folks.

Thanks,

Cliff McCluney
Kerens, TX.'