I took my truck to the shop and some idiot mixed up the brake lines. I'm in desperate need of some sort of blue print/instruction sheet to properly connect the lines to my boosters. Each time when I'm driving and I use the brakes, it's as though I'm engaging the hand brake. The vechile can go from 70mph to 30mph as though I'm slamming on breaks. Also when I disengage my hand brake it engages the spring brake.
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M923 Air Brake Lines Accidentialy Switched
- Thread starter Chitangi
- Start date
- 12,195
- 326
- 0
- Location
- gainesville, ga.
This makes NO sense, what "boosters" are you talking about, was the lines switched at the axles or each wheel,
ALSO why are you driving the truck with he brakes in this condition, after it warms up, give me a call (703-389-6705) and I will go and put eyes on a 939 rear air line connections so we can get your truck safe to drive,
- 3,871
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- Gray Court SC
Ron maybe he's calling the cans boosters.
But I don't see how you could reverse the lines on the cans are they not different sizes.
But I don't see how you could reverse the lines on the cans are they not different sizes.
dawico
Member
- 728
- 1
- 18
- Location
- Lampasas,TX
Why didn't you immediately take it back to the shop?
I assume they did brake work for you. Have them make it right.
The spring brake lines and the foot brake lines have all been switched up. I'm not driving the truck, just a road test to see if the problem is fixed and this is what happened. The original problem was an air leak from one of the spring brake lines and then after taking it in for repairs this is the resulting problem.
- 12,195
- 326
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- Location
- gainesville, ga.
Are you calling the service brakes foot brakes, it help if things are called the right name, I am slowly training a friend this very principle.
Take it to a DIFFERENT TRUCK shop, then charge the first one for the fix since the first one had NO IDEA what they were doing, AND next time call me.
Refer back to post #3
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- Tonopah, AZ
The p2p software will help, it is in the TM part of S/S.
http://www.steelsoldiers.com/showthread.php?79228-TM-s-for-the-939-series-trucks
http://www.steelsoldiers.com/showthread.php?79228-TM-s-for-the-939-series-trucks
Messed up Air Brake System M923 with Abs system.
Ok guys ..will be specific and straight to the point.My brake air lines have been switched on all the 4 Cans including the fittings somebody was trying to diagnise some brake air leaks and pulled all .Basically each time I apply the spring brake i get a continuos air loss from the spring brake control valve and a buzzing sound beneath the driver door,and only stops buzzing
When the hand brake is applied..which basically means they are working in opposite and also the hand brakes seems to be applied each time I apply the foot brake after driving a distance and almost brings the truck to a stop...sorry guys long explanation just need to pictures or specific diagrams to fix this mess..its giving me ****...thanks for all you do
Ok guys ..will be specific and straight to the point.My brake air lines have been switched on all the 4 Cans including the fittings somebody was trying to diagnise some brake air leaks and pulled all .Basically each time I apply the spring brake i get a continuos air loss from the spring brake control valve and a buzzing sound beneath the driver door,and only stops buzzing
When the hand brake is applied..which basically means they are working in opposite and also the hand brakes seems to be applied each time I apply the foot brake after driving a distance and almost brings the truck to a stop...sorry guys long explanation just need to pictures or specific diagrams to fix this mess..its giving me ****...thanks for all you do
dawico
Member
- 728
- 1
- 18
- Location
- Lampasas,TX
Have you downloaded all the TMs? There are three or four different sets covering your truck, including operation, maintenance, and parts.
I believe the diagrams are in the -24 or -34 set but I can't say for sure. There is also a trouble shooting section.
Many of them are available here in the TM section on this site.
On a side note, I would guess your problem isn't as bad as you think. Just find the diagrams and trace your lines and see if that tells you anything.
Good luck.
I believe the diagrams are in the -24 or -34 set but I can't say for sure. There is also a trouble shooting section.
Many of them are available here in the TM section on this site.
On a side note, I would guess your problem isn't as bad as you think. Just find the diagrams and trace your lines and see if that tells you anything.
Good luck.
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- Orlando, FL
You really should get the air system diagram from the TM and diagnose your problem. Using the wrong terminology to try and describe your problems won't help anyone figure it out for you. If someone does come up with the solution, you may not understand what they are telling you.
- 3,224
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- Tonopah, AZ
They are at the back of the TM9-2320-272-24-4
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- NY
Yup.