| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,010 Posts1,055,308 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Apr 2000 Posts: 179 Shop Shark | | Shop Shark Joined: Apr 2000 Posts: 179 | Could have an obstruction in the vent on the hydro or a problem with spring on the small diaphragm(sp?). I had bug nests clog the vent on my '49 (PO left the screen off) and had similar problems. After cleaning it I put the spring back in on the the wrong side of the small diaphragm, making the problem worse. After puting the spring back in right, it worked perfectly. I have a IH shop manual that came with my '68 Load Star. It covers several of the IH hydrovac systems. When I get back after the weekend, I could scan any pages that cover your system (is this an IH your working on?).
Joe McNeel
http://mcneelnet.com/~jmcneel/59.html
| | |
|
|
| |
