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Mark G
Date registered: Jul 2006
Location: Ft. Lauderdale, FL USA
Vehicle(s): 1985 280GE LWB AT
| Break Trouble - 460
Seeing another post below made me think of possible similar problems with sticking pistons with the front calipers.
I was away on business for 3 weeks. When I returned my son informed me while using the G on the highway he had an emergency breaking incident. No problem, the G stopped and an accident was avoided but he did mention he smoked the tires while stopping.
However, now the break pedal can be pushed to the floor. There is pressure that you can hear and the pressure can be pumped up but you can still ultimately push the peddle to its full extension. I also noticed while breaking the truck pulls to the left. Quick inspection finds no obvious leaks, fluid is good condition and topped off and always change it every year, and pads have lots of life on them. Well now it’s parked and wonder if I need a new break master cylinder (its only 4-5 years old). But what about the pulling to the right? Am I looking at two problems or could it be a Master cylinder with leaky seals causing the pulling to the right? I am already checking with Steve Dempsey on new Master Cylinder but checking for feedback first before throwing parts at the truck.
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gwagen460swb
Extreme Veteran
Date registered: Apr 2006
Location: Oklahoma City, OK
Vehicle(s): 280GE SWB, Toyota Highlander, BMW530i, RR HSE
Posts: 513
| Re: Break Trouble - 460
I had a similar issue last May. The only things different were that my G did not pull to the right (or left) and I had no brake fluid. Apparently when the fluids were changed out, someone forgot to put brake fluid back in the container.
At first, we thought there might have been an issue with the master cylinder. No master cylinder was needed. The only other issue I had was with a brake line that needed replacement. This was the extent of my issue. |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| RE: Break Trouble - 460
Another possibility for pulling to one side is that one or more of the rubber brake hoses have swollen internally. They can look just fine on the outside and still be swollen on the inside. The hoses are cheap and should be replaced at 15 years or so. |
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Fenalaar
Elite Veteran
Date registered: May 2006
Location: Narvik, Norway
Vehicle(s): 2001 ML270CDI, Polaris 400L Big Boss
Posts: 826
| Re: Break Trouble - 460
Get the brakes tested on a brake analyzer to see if they're uneven.
Mine was uneven on the rear brakes, and the only thing it needed was cleaning out the rear drums of old brake dust and then an adjustment.
Johan-Kr |
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Iver460
Veteran
Date registered: Apr 2006
Location: Norway
Vehicle(s): '82 300 GD STT Cab (two other Gs in family)
Posts: 291
| Re: Break Trouble - 460
They're always uneven in the rear. Norways leading G-specialist Fjeldstad always disassemble them, put all parts in their cleaner and assemble again. Cleaning them out once a year should do. |
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Tjærand
Extreme Veteran
Date registered: Oct 2006
Location: Nøtterøy, Norway
Vehicle(s): 1996 G320
Posts: 403
| Re: Break Trouble - 460
Yes, or wait 3 years like I did and trade you first born son for a brake job. I saw the innards of the drum brakes and my wife is still bothered by me waking up screaming at night. |
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Iver460
Veteran
Date registered: Apr 2006
Location: Norway
Vehicle(s): '82 300 GD STT Cab (two other Gs in family)
Posts: 291
| Re: Break Trouble - 460
But your rear brakes were quite even, weren't they Tjærand? 
My sister comes to me every now and then, and says "Iver, the brakes are pulling a bit, can you take it for a spin?". 3-4 full locks later they're usually ok. Guess I'll have to buy a tube of copper paste and give the front calipers some love'n'lube  |
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