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Farmall & IHC Tractors Discussion Forum
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o t trailer brakes

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in sticks

08-13-2005 07:48:43




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on a tagalong trailer with electric brakes i am working on, the long brake shoe is toward the front and the other side faces the rear.which is correct? i do not remember which so need help




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Janicholson

08-13-2005 21:03:07




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 Re: o t trailer brakes in reply to in sticks, 08-13-2005 07:48:43  
Servo action in shoe brakes is the issue. This is the force on the shoes caused by the shoes themselves wraping into the curve of the drum. The leading shoe is always found by noting the forward direction of rotation (CW on right side, CCW on left), and the fixed anchor point of the assembly. in almost every case it is in the same location as the wheel cylinder. This fixed post takes the push of both shoes. The leading shoe will be the shorter length of lining. Taking the left wheel (drivers side) and with the fixed post and cylinder at the top, the leading shoe will be on the left (towards the front of the trailer). This shoe pushes on the secondary, or trailing shoe with the combined hydraulic or electric pressure) and its own servo force. the larger secondary shoe is longer so that even with more force on it they both wear about the same, and heat about the same.
I hope this helps. Jim Nicholson

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Wayne Swenson

08-13-2005 09:37:20




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 Re: o t trailer brakes in reply to in sticks, 08-13-2005 07:48:43  
On all the cars & truck I have worked on, the long shoe is always towards the back of the vehicle. Trailers should be the same.



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T_Bone

08-13-2005 09:36:04




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 Re: o t trailer brakes in reply to in sticks, 08-13-2005 07:48:43  
Hi IS,

Long shoe towards the tongue.

T_Bone



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T_Bone

08-14-2005 09:22:42




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 Re: o t trailer brakes in reply to T_Bone, 08-13-2005 09:36:04  
Hi IS,

That'll teach me to answer questions when I'm tired.

The guys are correct, long shoe on back. Sorry for the mistake.

T_Bone



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504

08-14-2005 17:43:07




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 Re: o t trailer brakes in reply to T_Bone, 08-14-2005 09:22:42  
Long shoe to the rear.



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