Massey 8150 dynashift problem

flatliner · Jun 10, 2017

I'm having trouble with our 8150's dynashift. When she warm's up, I can only get 2 out of the 4 gears. When she's switched off and allowed to cool, all works as normal. I've been told that it could be a sticking solenoid. Could someone tell me if the 2 solenoids I've circled on the photo below are for the dynashift?

davedb · Jun 10, 2017

yes they are the dynashift ones, im pretty sure they are the same as the PTO, 4WD,difflock ones at the back so you could probably swap them round to try

flatliner · Jun 11, 2017

Cheers. What's the solenoid on the round plate, just under the gear sticks, the wires very bare on it, and I thought I'd found the problem but tidied the wires up but made no difference.

davedb · Jun 11, 2017

flatliner said:
Cheers. What's the solenoid on the round plate, just under the gear sticks, the wires very bare on it, and I thought I'd found the problem but tidied the wires up but made no difference.

That changes the high and low when you pull the main gearstick against the spring

flatliner · Jun 12, 2017

I checked out the power going to the solenoids, going through each of the shifts A - D, last night when all was working. When it stopped working today I checked again, and got the same readings, so all ok on the power end. Anyway of telling which one is faulty............... only shifts up when the lever is moved from B - C, and this moves her into top gear. And only shifts down when lever is moved from C - B, which I'm almost certain is moving her in bottom gear.

davedb · Jun 12, 2017

flatliner said:
I checked out the power going to the solenoids, going through each of the shifts A - D, last night when all was working. When it stopped working today I checked again, and got the same readings, so all ok on the power end. Anyway of telling which one is faulty............... only shifts up when the lever is moved from B - C, and this moves her into top gear. And only shifts down when lever is moved from C - B, which I'm almost certain is moving her in bottom gear.

Could try unplugging each one and see what happens?

flatliner · Jun 12, 2017

davedb said:
Could try unplugging each one and see what happens?

Sometimes the simplest suggestions are the best. lol

madscientist · Jun 12, 2017

Take off plugs off either dynashift solenoid. Could be a snapped off pin for + or - mating the plug. Will make her shift outta sequence. PTO brake solenoid swaps ok

flatliner · Jun 13, 2017

When taking the solenoids out, is there anything under pressure and liable to jump out?

REStracTORATION · Jun 13, 2017

flatliner said:
When taking the solenoids out, is there anything under pressure and liable to jump out?

No just release slowly and undo by hand shows there is little pressure there when engine is off
But im no expert just past experience of many solenoid swapping

flatliner · Jun 13, 2017

OK, with all working this morning, tried disconnecting the solenoids one at a time. With the back one disconnected I'm getting the same shifting sequence as mentioned in post #5.

The pto solenoid, is it one of the group of 3 in front of the back axle on the same side?

davedb · Jun 13, 2017

flatliner said:
OK, with all working this morning, tried disconnecting the solenoids one at a time. With the back one disconnected I'm getting the same shifting sequence as mentioned in post #5.

The pto solenoid, is it one of the group of 3 in front of the back axle on the same side?

They are easy to remove, just take the little 17mm nut of and they should slide off they sometimes need a screwdriver behind them to just help, just swap it with any of them at the back it won't matter just for testing

flatliner · Jun 14, 2017

Thanks for all the help lads. I got a bit of time to swap solenoids round today, and I've found the one that's messing about. Picking up a new one in the morning.

madscientist · Jun 15, 2017

flatliner said:
Thanks for all the help lads. I got a bit of time to swap solenoids round today, and I've found the one that's messing about. Picking up a new one in the morning.

It's ok everyone 8100 and 6100 not that bad. Big boy mechano sets. Just add friends and time. Kick ass tractors when on song.

flatliner · Jun 15, 2017

madscientist said:
It's ok everyone 8100 and 6100 not that bad. Big boy mechano sets. Just add friends and time. Kick ass tractors when on song.

True. We've also got a TM190, and if I have the choice, I take the 8150 everytime.

rob h · Jun 15, 2017

I realy wanted a 8150 to replace the 3670 but you just cant find a good one for sale have they all been exported

flatliner · Jun 16, 2017

rob h said:
I realy wanted a 8150 to replace the 3670 but you just cant find a good one for sale have they all been exported

Not too many clean one's about. Although there was, what looked to be, an absolutely mint 8160 on Donedeal a few months back.

holywell farmer · Jun 18, 2017

flatliner said:
Thanks for all the help lads. I got a bit of time to swap solenoids round today, and I've found the one that's messing about. Picking up a new one in the morning.

Many hours on your tractor

flatliner · Jun 18, 2017

About 5500

ktc · Jun 18, 2017

I still have the 8160, 3200 hours

Massey 8150 dynashift problem

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