No air pressure on start up

[George Lowry]

Harold wrote:

> Curt,
> Upham is about 100mi north of Sacto.
>
> FYI, both Jacobs and Pac breaks are the same. Just that Jacobs was
> bought by Paccar.(Pac-Brake) I was mistaken about Cummins owning
> Jacobs. Jacobs makes various versions of braking devices. The one on
> my coach is a drive-line retarder.
> Harold
> '85WLFC35
> Upham,Ca.
>
Not true. The Original Jacobs Brake is an Engine brake utilizing the
valves and the Pac Brake is an Exhaust Brake utilizing a butterfly in
the exhaust system. Jacobs does make various types of braking systems
since the original patents have run out, but are the originator of the
Engine Brake only. The others they have copied. The end results of the
Pac Brake and the Jake Brake are basically the same in that they
slow the coach but the Jake is very noisy while the Pac is very quiet.
I have installed and used both and if given a choice today, would have
the Pac Brake. It is less complex and are not outlawed in many places
like the Jake Brake.

George Lowry
'95 WBDA 4203
Spearfish, SD