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Brakes pulling

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Old Mar 25, 2018 | 08:36 PM
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Brakes pulling

I have a 1998 E150 Mark III Conversion Van with a 5.4L, tow package, extra-load tires and stiffer rear springs. We use it to tow our camper which weighs in around 4500 lbs. The total GCWR is around 11,500 lbs. The van without the camper is rated at 7000# GVRW and a GCWR at 13,000# so I believe I'm within the capacities of this van. In December I had the front brakes serviced with new loaded calipers and hoses. The the left rotor was fairly new and the right rotor didn't show any need to change it. The brakes were bled and the van stops very normally in day to day driving around town, but when I'm pulling my camper and the brakes get heated up the van pulls to the left. The steering wheel does not want to turn it's just the van itself. I've been told it could be the right brake is not working as well as the left. Any suggestions out there?? Thanks in advance for your thoughts!
 
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Old Mar 25, 2018 | 10:31 PM
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I would think if it's a front brake issue you'd have the steering wheel pulling in the direction the van wants to turn. Could be the left rear brakes grabbing.
 
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Old Mar 26, 2018 | 08:37 AM
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Originally Posted by CWR032
I would think if it's a front brake issue you'd have the steering wheel pulling in the direction the van wants to turn. Could be the left rear brakes grabbing.
Thanks, I had never thought of that. The one thing I forgot to mention is I have a IR Thermometer and in checking the front brakes the left rotor is about 60-70 degrees hotter than the right rotor which leads me to believe it's the front brakes. But your suggestions is a valid one and I will have the rear brakes checked out.

Mo
 
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Old Mar 27, 2018 | 01:06 AM
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normally the RF is hotter due to the crown in the road
pulling against the crown is odd as is the LF being hotter
 
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Old Mar 27, 2018 | 08:04 AM
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"Left rotor fairly new" so it was replaced, probably because of wear and the right din't wear as much.
The vehicle pull to the left when the demands on the brakes are higher
The temperature on the left caliper is higher.

I think your issue is with the front right brake not having enough bite. Kink lines, leaky piston; worn, defective or contaminated with oil pads... I would check for leaks and replace all 4 pads to begin with.
 
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Old Mar 27, 2018 | 09:25 AM
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Originally Posted by GreeVan
"Left rotor fairly new" so it was replaced, probably because of wear and the right din't wear as much.
The vehicle pull to the left when the demands on the brakes are higher
The temperature on the left caliper is higher.

I think your issue is with the front right brake not having enough bite. Kink lines, leaky piston; worn, defective or contaminated with oil pads... I would check for leaks and replace all 4 pads to begin with.
Thanks -- sounds like the right approach. I will have that checked out. This is second post suggesting the RF is not doing it and the demand is mostly on the LF.
 
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Old Mar 27, 2018 | 11:05 AM
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Originally Posted by GreeVan
"Left rotor fairly new" so it was replaced, probably because of wear and the right din't wear as much.
The vehicle pull to the left when the demands on the brakes are higher
The temperature on the left caliper is higher.

I think your issue is with the front right brake not having enough bite. Kink lines, leaky piston; worn, defective or contaminated with oil pads... I would check for leaks and replace all 4 pads to begin with.
or the caliper is stuck
I would not throw parts at a problem w/o diagnosing the issue
 
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Old Mar 27, 2018 | 11:34 AM
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Originally Posted by vettex2
or the caliper is stuck
I would not throw parts at a problem w/o diagnosing the issue
That too.
I usually agree with your last statement, but brake pads are a wear item, at some point you are going to replace them anyway, and not too expensive. You have to account also how much is your time worth. Sometimes it is better to replace one or two usual suspects than spending a lot of time chasing clues. On a 20 years old vehicle that could qualify also as preventive maintenance.
 
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Old Mar 27, 2018 | 02:15 PM
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Brakes pulling

Originally Posted by GreeVan
That too.
I usually agree with your last statement, but brake pads are a wear item, at some point you are going to replace them anyway, and not too expensive. You have to account also how much is your time worth. Sometimes it is better to replace one or two usual suspects than spending a lot of time chasing clues. On a 20 years old vehicle that could qualify also as preventive maintenance.
In my OP I stated (or intended to state) the calipers, pads and hoses were replaced December 22, 2017. So all those part are quite new EXCEPT the RF rotor which appeared normal and certainly within specs as far as thickness, etc. Do all your suggestions lead to a possible installation problem with this new stuff, especially the RF installation?

Regardless, my question remains: why does only happen when the brakes are very hot from heavy use (pulling my camper)? Around town and just normal day-to-day driving there is absolutely NO pull and everything feels perfectly normal.

I would appreciate those posters with the good suggestions let me know if they feel the same with the HOT brakes. Thanks so much for your thoughts -- many of which (if not all) are good ones.

Mo
 
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Old Mar 27, 2018 | 02:26 PM
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As the discussion drift, is easy to forget the initial details. If this happens when hot, I am thinking air in the system. Bleeding all the brakes again is a cheap insurance.
 
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Old Mar 27, 2018 | 04:18 PM
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Originally Posted by GreeVan
That too.
I usually agree with your last statement, but brake pads are a wear item, at some point you are going to replace them anyway, and not too expensive. You have to account also how much is your time worth. Sometimes it is better to replace one or two usual suspects than spending a lot of time chasing clues. On a 20 years old vehicle that could qualify also as preventive maintenance.
4 month old pads?
nope
something else is going on

what are the thicknesses of the rotors?

also
maybe something with the hitch is out of alignment?
 
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