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Massey 7400 series brakes

Hi, anyone got any ideas why my brake pedal has started pulsing when I apply the brakes. It only does it once warm and not all the time. If I apply the brakes very gently it won't do it and also if I am towing something with trailer brakes it doesn't do it. :scratchhead:
 
I have only noticed it over the last couple of days. It varies in severity, at times its that bad that it's hard to stop the tractor. Could some dirt have got into the trailer braking valve causing something to stick?
 

Cowabunga

Member
Location
Ceredigion,Wales
I have only noticed it over the last couple of days. It varies in severity, at times its that bad that it's hard to stop the tractor. Could some dirt have got into the trailer braking valve causing something to stick?

I've come across this pulsing before but those times there was no fault, that was just how they were.

Check simple things first. I'd check for any wet patches, because an oil leak might cause this.
 
No visible signs of an oil leak. Now you come to mention the brake booster there is a faint whooshing noise coming from the master cylinders when you push the brake pedals down
 

Farma Parma

Member
Arable Farmer
Location
Northumberlandia
brakes on my 7499 are useable but nowt like the pedal feel on the 6480
even when hooked up to a trailer which they do work the trailers brakes yet still feel naff compared to the 6480's set up
Dealer checked everything over & thats just how they are.

Yes i know everything from the back of the pedals is totally diff on the 7499 but all the same you would have thought the
whole thing would actually be a step up in quality coming from the FENDT stable but its the other way around.

Motto is try not to use the bloody things.
 
Had a look on the agco parts site and the only accumulator I can see to do with the brake circuit is part number 3789371M3. From what I can work out it sits in the low pressure supply line to the master cylinders. @mf3085 I take it you have had similar issues before, don't mind buying parts so long as I'm pretty sure they are needed.
 
Exactly the same as mine, had to borrow a tractor for the round baler yesterday as it's undrivable with no trailer brakes plugged in! Going to ring dealer in a min and see if they have an accumulator, hopefully that will sort out.
 
New accumulator is £139 from my local dealer, not to bad but have you seen where it's located on the tractor? Only way I can see of getting to it is lifting the cab :mad: Anyone done one before and have any tips please?
 

rolfy

New Member
Location
AUSTRALIA
New accumulator is £139 from my local dealer, not to bad but have you seen where it's located on the tractor? Only way I can see of getting to it is lifting the cab :mad: Anyone done one before and have any tips please?
ll
New accumulator is £139 from my local dealer, not to bad but have you seen where it's located on the tractor? Only way I can see of getting to it is lifting the cab :mad: Anyone done one before and have any tips please?
left hand wheel and fuel tank need to be removed to get to it,cab doesnt need to be lifted,its a good time to check the front cab mount rubbers while the fuel tank is out
 

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Webinar: Expanded Sustainable Farming Incentive offer 2024 -26th Sept

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On Thursday 26th September, we’re holding a webinar for farmers to go through the guidance, actions and detail for the expanded Sustainable Farming Incentive (SFI) offer. This was planned for end of May, but had to be delayed due to the general election. We apologise about that.

Farming and Countryside Programme Director, Janet Hughes will be joined by policy leads working on SFI, and colleagues from the Rural Payment Agency and Catchment Sensitive Farming.

This webinar will be...
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