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M151--brake question

gem1410

gem1410

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The jeep I am working on is an M718 ambulance and I have to replace all the brake wheel cylinders----the front wheel cylinders are 3/4 inch and the rears are 1 inch --I understand the m151a2 has 1 inch wheel cylinders in the front and 3/4 inch in the rear--would I be better off using the A2 configuration--I never have any weight in the vehical--thanks George
 
Last edited:
cstaup

cstaup

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If you have an A1, stick with the original, simply for the next probable owner. It gets kinda confusing when there are mods done that aren't IAW thw TM.

Just my 2 cents
 
rickf

rickf

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I don't generally post on the 151 board over here but I just happened by. I am usually on the G503 or G838. You have to get those cylinders OUT of that configuration!! NOW!! You can go with 3/4 all around or 1" in front and 3/4 in rear but what you have there is a prelude to a crash since the rear wheels will lock long before the fronts. That is why they went to 1" in front and 3/4 in the rear to prevent the rears from locking before the front.

Rick
 
poof

poof

Dirty Hippie
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rickf said:
I don't generally post on the 151 board over here but I just happened by. I am usually on the G503 or G838. You have to get those cylinders OUT of that configuration!! NOW!! You can go with 3/4 all around or 1" in front and 3/4 in rear but what you have there is a prelude to a crash since the rear wheels will lock long before the fronts. That is why they went to 1" in front and 3/4 in the rear to prevent the rears from locking before the front.

Rick
Click to expand...

Please stop by more often... your vast Knowlage is very welcome here too..you know
J.P.
 
rickf

rickf

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I would love to JP but I already post on 2 M-151 forums, 1 automotive master technician forum, 1 Diesel truck forum plus all the normal stuff associated with a house plus a full time job. There are so many hours in a day!

Feel free to send anyone over but don't run afoul of the others on here.



Rick
 
gem1410

gem1410

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Thanks for the info--The m151 came from the military that way--I guess who ever put the 1 inch cylinder on just did not care as the other rear was a 3/4 inch--thanks George
 
rickf

rickf

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What you experienced is exactly why there were so many TB's put out and papers written on how the wheel cylinders MUST be installed correctly. What you have there is especially dangerous because it will lock one real wheel and pull the vehicle around sideways. That WILL be a rollover no matter whether it is an A1 or A2.

Rick
 
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