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Tractor transmission oil overheating. ( Valtra 6400)

s o c

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s o c Mentor

s o c

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On 24/08/2025 at 21:34, MattyF said:

I’ve had brakes and every thing heat up on 6400 when the brake servo has started to fail. 

Yeah.  Valtra mechanic they can corrode after a while and cause brakes to stick on slightly. I changed one this evening.

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GarethM
GarethM

Valtra oil filter ?, had it once where a filter was fitted to a hydraulic power pack pump that was the smaller micron size.   Thinking cleaner must be better, for it to build up back pressur

s o c
s o c

Hopefully, this may be the culprit. cable either got pulled off or more likely, wasn’t connected properly after fitting pump. will know for sure in a few days when driven home. Thanks t

s o c
s o c

Hi. Wondering if anyone on here has come across this problem. I’ve recently had new hydraulic pump fitted to my Valtra  6400 (with  Botex roofmount crane) Also fitted new pto shaft and flywh

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MattyF Grand Master

MattyF

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Hopefully makes the difference.. I got about 8miles from home and had to ring for a fire extinguisher as I thought it was going to burst in to flames !! Local Valtra mechanic said straight off it’s the brake servo. 

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