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Super 90 multi-power

K

Keith Jones

Member
I am looking at a Super 90 with multi-power and when it is in high multi-power the tractor will free roll the same as when in low.
The tractor is away from me so I'm unable to drive it, does this mean that the multi-power is out? I checked with our local dealer
and the parts aren't available to rebuild the multi-power from AGCO but are they available from anyone else. I do know that the
multi-power on the 90 was unique to just this one model and I'm unaware of any other models that had the same thing. If anyone
could guide me I would appreciate it.
 
If it freewheels in high the MP is out. My uncle couldn't find parts for his so he ended up putting an 85 back half with it.
 
Make sure it's not something simple, like low on oil. That model has it's own style of Multi-Power, unlike other MF models, there is no dry main clutch. Both lo and hi are used in oil, with lo being used as the main clutch. Most I've been around and worked on were jerky and hard to shift if the trans-brake didn't work. The clutch system, and PTO clutch system use return oil from the Power steering to operate, so if the power steering is weak it may need a pump soon. Pump is available, but expensive, that's the first part usually pulled at the salvage yards too on 85s and S90s. 85 pump is the same but the drive gear is different. I'd rather have the 8 speed transmission..
 
That's what I was thinking. I will check to see if the power steering is working but I believe that locating an eight speed rear end would be better. Will an 85 bolt up easily? I know where there is one of them.
 
If the S90 is gas an 85 gas 8 speed will fit, you will need a flywheel/clutch assembly too. Diesel models used a different trans case so the larger starter nose will have room. Also remember the power steering pumps are the same, but MF changed the pump drive gear pitch between the 85 and S90, I think for gear noise, as my 85D I use for tractor rides seems louder than my brothers S90D is.
 
Just remembered there is also a trans gear internal change between the drop box or planetary axle tractors. Drop box tractors have the faster geared transmission, and the planetary models have the slower geared transmission. My 85D has the planetary axles, but I put in the faster gearset so for most tractor rides engine just runs at a fast idle. Wide open in 8th gear with 18.4x38 radials is now 30 plus MPH. I seldom use 8th much anymore, but is fun when I do...
 
Hi Keith
Your tractors multi-power may just need the seals replaced...unavailable from Agco, But I do have them, as well as some other parts for the multi-power transmission.
Also like others have mentioned, the PS pump may be weak and not "locking" the clutches, causing slippage.
I have 10 Massey super 90s as well as a few parts tractors. Two are the multi-power version, and I do prefer them in certain jobs where gearing up or down is frequent...just switch the transmission on the go...no clutching.
Wayne
 
Yes it is, but taller tires do ride better than shorter tires do as they step over bumps with less jarring. Have 1100x16s on the front too. All this tractor does mostly is tractor drives anymore, or on the bush hog a bit too.
 
This old coot hasn't learned to post photos yet. Picture a standard clearance 85 diesel in work clothes with these redneck features, a cut down aluminum truck bed cap for shade, an old plastic Coke tray on the hood used for the cup holders, snacks and GPS, a bus seat for two to ride safely, right side hand clutch, a bicycle speedometer/odometer calibrated to the right rear wheel, exhaust manifold canned food warmers, and for the kids in town a home made bubble machine on back to laugh at. Maybe my friend Tony still has some photos saved from the Ferguson show last summer..
 
My dad had an 8 speed rear end out of an 85, he has since passed and my brother and I think it was out of a gas but are there any distinquishing features to tell the difference?
 
On my 85 gas the trans casting # by the clutch pedal is 184 703 M1. On my 85 diesel the # is 184 703 M2, my S90 puller has the M2 # also. The diesel M2 trans has a bulge at the starter nose area for the larger diesel starter for Continental or Perkins engines. The M2 would bolt up to a gas engine OK as both have the same engine bolt pattern, but the M1 will not have room for the diesel starter.
 
It was surprising how many variants they had at the time on the super 90. Many thanks.I am going to call the seller and speak with him. It is an extremely sharp Super 90 LP that has an original cab on it and have him do some checking for me.
 
(quoted from post at 09:45:56 06/02/15) On my 85 gas the trans casting # by the clutch pedal is 184 703 M1. On my 85 diesel the # is 184 703 M2, my S90 puller has the M2 # also. The diesel M2 trans has a bulge at the starter nose area for the larger diesel starter for Continental or Perkins engines. The M2 would bolt up to a gas engine OK as both have the same engine bolt pattern, but the M1 will not have room for the diesel starter.
Click to expand...

In Massey numbering system,a part finishing with an M2, M3, M4 etc would always replace an M1, M2 etc...
This allow to store less spare parts.Still same thing today on new Masseys. It came from Massey Harris!
 
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