The GMC CCKW

Hi all just wanted to ask What Hydrovac do you have on your Chevy ??? are there 3 types like the GMC ?? Where are the model numbers located on the hydrovac so i know which model i have ?? all i know mine is a Bendix

I found during my restoration that there were 3 models for the G506 series as well with the same spotting differences as the CCKW.( do you know what they are ? )
I went with the 3rd series single diaphram model. Purchased from a vendor in Oregon USA
I'm certain you should be able to locate a suitable replacement "closer" to home

Hope this helps
John

Thanks John
i'm not sure but i think i have series 1 ???? how can i tell the difference ?? between 1 & 2 ??? it has straight tube one end with Bendix facing the front and other end with a larger chamber and air intake the other ... will try and post pic

My understanding of the series one is , a dual diaphram with the "tie rods" fastening thru a triangular plate on each end , second model again dual diaphram but with the tie rod going thru cast "J " hooks on either end, and the 3rd series single diaphram with wire/rod J hooks ( Avail thru most brake equipment jobbers )today.

Hope this helps
John

Look here:

http://tm9-801.com/hydrovacid/index.htm

Many thanks for link ... Yes i have series one model .... is there anyway of testing this vac if engine not running and does anyone know how easy they are to rebuild ???? the pros and cons
thanks in advance
Kevin

State side the re-build kits for dual diaphram Chevy or even CCKW Hydro-vac are non-existant.....But on your side of the pond I'm sure Ward, or Leegwater(sp) has them avail.
They need a vac. source to function.
John