Home | Gallery | Forum | Ads YESTERDAYSTRUCK.COM 
The Classic Truck Resource Page
Vintage Truck Headquarters

Featured Photo

Classified Ads
Photo Ads

Discussion Forum
Forum Archives

Misc Truck Photos
Ford Truck Photos
Picture List

Research & Info
Model Profiles
Ford F-Series
Truck Links

Contact Us

Related Sites
Antique Tractors
Kountry Life
Tractor Parts
Tractor Manuals

Classic Truck Discussion Forum

loadstar w/ 345 stalling when brakes applied

Welcome [Log out]
Author  [Modern View]

06-18-2017 17:20:59

Report to Moderator

when i step on the brakes the intake loses vacuum and stalls. pulled the hose to the brake booster at the oil bath air cleaner on top of engine. plugged the hose with my palm, engine doesnt stall when brakes applied. seemed like pretty strong vacuum on my skin through the booster. perhaps too much, interferring with air flow through the carb? is this a booster failure, or something else??

[Reply]   [No Email]

06-19-2017 09:56:05

Report to Moderator
 Re: loadstar w/ 345 stalling when brakes applied in reply to Kell, 06-18-2017 17:20:59  
thinking it's probably a vacuum leak in the booster through one of the diaphragms or a seal. when i wait a moment before plugging the air inlet hose for the booster, and the block it, there's still strong vacuum. without a leak, i would think the air would fill the booster and there would be no vacuum on the inlet hose and air side of the booster. gonna pull it.

[Reply]  [No Email]
Jon Hagen

09-14-2017 21:04:35

Report to Moderator
 Re: loadstar w/ 345 stalling when brakes applied in reply to Kell, 06-19-2017 09:56:05  
When you step on the brake, that air hose from booster to air cleaner should flow air for a second then stop as the diaphragm hits it"s travel limit.

If that hose sucks air as long as you step on the brake, then a diaphragm has failed and booster needs to be rebuilt or replaced.

[Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Add a Reply]

Hop to:


Copyright © 2002-2013 YesterdaysTruck.com
Antique Truck Headquarters