needs some education on mm445 transmisssion and differential

glvu · Sep 30, 2015

Just brought 1954 mm445 with 206h-4 engine and b1w model . First off, I do not know anything about tractor. Brought it to move some dirts around. The tractor runs and drive fine, a couple leaks here there but works. Need to be educated on the transmission and differential. Questions: 1. How do I check transmission level. 2. What type of transmission do I have and where do I fill the transmission fluid? 3) what type of differential do I have and where do I check and fill the differential oil. I uploaded some pics for easier identification. Any others "thing you should know" is greatly appreciative.FYI The 3 point hitch hydraulic does not work (see pics) that is why there is a bar across the pumps. future project.

Alan K · Sep 30, 2015

From the looks of it Im betting you have a mid 1956 or early 1957 model. Do you have the serial number for it? It is on the right hand side of the transmission-rear end. The transmission / differential filler is the large plug with the square hole just behind the shift lever. Most of them used 80-90 gear lube. They share the same fluid. I will have to check the book but if they are like the other MMs with ampli-torque there should be two plugs on the right side of the transmission (by the brakes) that is where you check the level of the oil. There is a small plate under the seat that has two levers on it. That is where you check the hydraulic / power steering oil. You might be low on oil. When full it should be about 1" below the casting where the plate bolts on. Those two levers are the rate and cycle levers for the 3 point hitch. The canister under the seat is where the hydraulic filter is located (just in front of where the hydraulic hoses are screwed in). I think they use the same one as the 5 Star and early M5, if so they are available from NAPA and possibly agco yet.

glvu · Sep 30, 2015

(quoted from post at 16:54:08 09/30/15) From the looks of it Im betting you have a mid 1956 or early 1957 model. Do you have the serial number for it? It is on the right hand side of the transmission-rear end. The transmission / differential filler is the large plug with the square hole just behind the shift lever. Most of them used 80-90 gear lube. They share the same fluid. I will have to check the book but if they are like the other MMs with ampli-torque there should be two plugs on the right side of the transmission (by the brakes) that is where you check the level of the oil. There is a small plate under the seat that has two levers on it. That is where you check the hydraulic / power steering oil. You might be low on oil. When full it should be about 1" below the casting where the plate bolts on. Those two levers are the rate and cycle levers for the 3 point hitch. The canister under the seat is where the hydraulic filter is located (just in front of where the hydraulic hoses are screwed in). I think they use the same one as the 5 Star and early M5, if so they are available from NAPA and possibly agco yet.

Thank you so much. The serial number is 11100230.. Just want to double check with you on what you have directed. I circled the "two plugs on the right side of the transmission" are they what you were referring to? So if I unscrew the bolts and the fluid overflows then the tractor has enough lube?. I assuming the "small plate under the seat that has two levers" is the one circle in red. I need to unscrew the 3 bolts to check and see of the oil level is "1 inch below the casting ", is this correct? I assuming that the hydraulic uses the same 80-90 gear lube? Also what is the cylinder right next to hydraulic/power steering underneath the seat?

glvu · Sep 30, 2015

glvu · Sep 30, 2015

glvu · Sep 30, 2015

(quoted from post at 21:23:43 09/30/15)

glvu · Sep 30, 2015

glvu · Sep 30, 2015

(quoted from post at 21:31:05 09/30/15)

glvu · Sep 30, 2015

glvu · Sep 30, 2015

Alan K · Oct 1, 2015

Yes those should be the two plugs you have circled for the transmission / differential gear oil. The hydraulic filler is under the small plate with the two levers on it (Four 1/4" bolts hold it on, you have it in blue). The three plugs you have in red are just that, plugs. They are used for a visual inspection to synchronize the valves inside the valve body, don't worry about those. The hydraulic / power steering was originally Type 55 which the closest thing now days I believe is automotive automatic transmission fluid. Ive used type A in my M5. Don't use 80-90 in the hydraulic / power steering or you will have problems. The cylinder under the seat to the left of center is for the piston that runs the 3 point hitch. Your serial number according to my list makes it a 1957 445 Industrial. Do you have a picture of the whole tractor? Where are you from?

glvu · Oct 1, 2015

(quoted from post at 22:38:02 09/30/15) Yes those should be the two plugs you have circled for the transmission / differential gear oil. The hydraulic filler is under the small plate with the two levers on it (Four 1/4" bolts hold it on, you have it in blue). The three plugs you have in red are just that, plugs. They are used for a visual inspection to synchronize the valves inside the valve body, don't worry about those. The hydraulic / power steering was originally Type 55 which the closest thing now days I believe is automotive automatic transmission fluid. Ive used type A in my M5. Don't use 80-90 in the hydraulic / power steering or you will have problems. The cylinder under the seat to the left of center is for the piston that runs the 3 point hitch. Your serial number according to my list makes it a 1957 445 Industrial. Do you have a picture of the whole tractor? Where are you from?

I am in Los Angeles. Where are you? What is the function of Rate and Cycle leveler?

Alan K · Oct 1, 2015

Im in my dining room lol...in Minnesota. The rate lever is for the rate of drop for the 3 point as if you wanted to slowly ease an implement into the ground or faster drop. The cycle lever is for the draft cycle of the 3 point if I remember correctly. Looks to be an industrial tractor.

glvu · Oct 5, 2015

(quoted from post at 07:49:05 10/01/15) Im in my dining room lol...in Minnesota. The rate lever is for the rate of drop for the 3 point as if you wanted to slowly ease an implement into the ground or faster drop. The cycle lever is for the draft cycle of the 3 point if I remember correctly. Looks to be an industrial tractor.

I have what seems to be a brake fluid leaking onto the rim of the back tires (see pic). Does the break fluid share same the system as the hydraulic/powersteering or does it share it with the transmission and differential, or is it independant. Just broght some 80/90 gear lube and will fill the transmission/differential. Brought some Dextron III before reading up on this forum. Can I use it for anything?

glvu · Oct 5, 2015

(quoted from post at 07:55:00 10/05/15)

(quoted from post at 07:49:05 10/01/15) Im in my dining room lol...in Minnesota. The rate lever is for the rate of drop for the 3 point as if you wanted to slowly ease an implement into the ground or faster drop. The cycle lever is for the draft cycle of the 3 point if I remember correctly. Looks to be an industrial tractor.

Click to expand...

I have what seems to be a brake fluid leaking onto the rim of the back tires (see pic). Does the break fluid share same the system as the hydraulic/powersteering or does it share it with the transmission and differential, or is it independant. Just broght some 80/90 gear lube and will fill the transmission/differential. Brought some Dextron III before reading up on this forum. Can I use it for anything?

Found the hydraulic filter at NAPA auto parts, Part Number: FIL 3110. Question: when I change out the filter is it like changing the motor oil in that I will have to drain the existing hydraulic fluid and replace it with some fresh one? If so, how many quarts? If I don't need to change out the fluid, should I be prepared for a gust of fluid when I open the hydraulic cylinder?

J.Wondergem · Oct 5, 2015

That leak on the back tire looks like it's chloride leaking out of your tire.

Alan K · Oct 5, 2015

I was thinking axle seal if not a fluid leak.

Alan K · Oct 5, 2015

I cant remember for sure without checking in the book, but I thought the whole system was 2 1/2 gallons. The canister, (farthest forward-right corner, when sitting on the seat) has the single bolt out the end and that where the filter is. There should be a small screen that is around the filter as well you will have to clean. Not all of the fluid will come gushing out if I remember correctly but it might be an ok time to drain it all and put in new. Changing those style filters can be messy, and if I remember correctly they are under a little spring pressure. Make note of where the gaskets are when you take it off.

Alan K · Oct 5, 2015

There is no brake fluid as these are dry brakes. That might be an axle seal leak. There is a cover on each side of the transmission /rear end, left one has a small cable attached to it, that is where your brake assembly is (behind the cover towards the center of the tractor). I believe you can use the Dexron III in the hydraulic. That is what I use in one of my M5s.

glvu · Oct 6, 2015

(quoted from post at 19:25:37 10/05/15) There is no brake fluid as these are dry brakes. That might be an axle seal leak. There is a cover on each side of the transmission /rear end, left one has a small cable attached to it, that is where your brake assembly is (behind the cover towards the center of the tractor). I believe you can use the Dexron III in the hydraulic. That is what I use in one of my M5s.

Thanks Alan. You give the novice some hope in maintaining his tractor. Am I correct to assume that the brakes, transmission, differential and front loader hydraulic all ran on the same fluid system? Question, back to the transmission, there are two plugs, next to brake, one is lower and the other one is higher. What does lower one check for and what does the higher one check for? Do both check for differential fluid?

Is this the cable you are referring to (see pic). Can't fine any place to fill the axle fluid. Also upload a pic of the left and right axel

glvu · Oct 6, 2015

Alan K · Oct 7, 2015

Those are dry brakes on the tractor, no fluid. Does the loader have a separate pump or is the loader plumbed in to the tractors hydraulic? It looks like your tractor has and industrial hydraulic pump where the belt pulley would normally be. One of the plugs on the transmission checks the ampli torque compartment (front plug) the other plug checks the transmission / rear end level. Yes that is the cable for the speedometer. There is no axle fluid, that is the transmission / differential oil that is leaking.

glvu · Oct 7, 2015

(quoted from post at 23:24:34 10/06/15) Those are dry brakes on the tractor, no fluid. Does the loader have a separate pump or is the loader plumbed in to the tractors hydraulic? It looks like your tractor has and industrial hydraulic pump where the belt pulley would normally be. One of the plugs on the transmission checks the ampli torque compartment (front plug) the other plug checks the transmission / rear end level. Yes that is the cable for the speedometer. There is no axle fluid, that is the transmission / differential oil that is leaking.

UH OH, I checked the rear plug and transmission fluid pour out of it. I checked the front plug and it was dry. I assumed that the front plug was for the transmission/differential so I unscrewed the center square screw and poured 6 more quarts of transmission fluid. Should I bleed the rear plug until it stop dripping?

I uploaded some pic showing the front loader hydraulic system. The red cylinder on the loader, blue circle, is where the hydraulic pump from the rear right side is connect to. The two loader levers is also connected to that red cylinder.

Alan K · Oct 7, 2015

Your loader hydraulic system is separate of the tractor hydraulics as Im assuming there is a oil reservoir in the loader frame somewhere. I think I would drive the tractor to equalize the oil in the ampli-torque and rear end and then check each plug again. If I remember correctly the ampli-torque compartment is filled through splash lubrication from the rear compartment. Try that and then see where it is at.

shinnery · Oct 8, 2015

I believe that line across the rear of the tractor is the suction hose to the hydraulic pump (the low pressure clamps and fittings) and it is coming from the hyd. reservoir for the loader.
Yes the A/T gets its oil from oil thrown off the gears as the transmission is operated. The oil is thrown out to the case and collects in a trough on the right side of the tranny. It then flows forward into the A/T compartment and fills it. The oil then drains back thru the bearing between the A/T and the tranny. So definitely use the tractor a while before checking the two levels.
Also do not use the low range on the AmpliTorque until the oil has warmed up by using the tractor. You may find it is easier to shift gears in low range but operate in high until the oil is warm.
Bryce

glvu · Oct 8, 2015

(quoted from post at 23:24:34 10/06/15) Those are dry brakes on the tractor, no fluid. Does the loader have a separate pump or is the loader plumbed in to the tractors hydraulic? It looks like your tractor has and industrial hydraulic pump where the belt pulley would normally be. One of the plugs on the transmission checks the ampli torque compartment (front plug) the other plug checks the transmission / rear end level. Yes that is the cable for the speedometer. There is no axle fluid, that is the transmission / differential oil that is leaking.

Do you know if the tractor has disc or drum brake?

Alan K · Oct 8, 2015

They are disc brakes. MM used disc brakes in everything after 53 if I remember correctly.

glvu · Oct 9, 2015

You guys were right on. The front plug did fill up after the tractor warmed up. Thanks.

needs some education on mm445 transmisssion and differential

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