Hi all - wondering if anyone knows why a 35 with a 4.236 with probably (gleaned from one of oldseabees's posts) a 2420 transmission & c272 converter has an issue of squirting transmission fluid out of the breather when it is under load (ok under normalish loads, but when pushed - it squirts) - we have the breather elevated with a hose approx 18" & have tried changing the hose to a different position on the transmission (now on the rhs - slightly higher than where it was prior). Any ideas greatly appreciated. Jimbob
Got some pics now to see what the setup is - & I checked - it is a 2420.
Make sure your oil level isnt too high, If it is too high the oil could be foaming causing it to spit out of the breather.
Thanks for the reply zlssefi - what is the correct level - I understand it to be at the height of the elbow with the bung in it on pic 3?? Jimbob
Jeembawb Manual states: 1) Machine must be LEVEL 2) Fluid must be hot ( operating temperature of 180-200 deg F) 3) Engine must be IDLING 550-600 rpm 4) Area around oil level plugs must be clean. Check & maintain level between HI & LO level plug openings at lower right rear face of transmission. Remove HI level plug to check if fluid escapes,allowing excess fluid to drain. If no fluid escapes remove LO level plug to check that fluid is above this opening. If this is not the case, replace plug & refill as necessary with type "A" automatic transmission fluid through opening in torque converter to bring fluid level to lower edge of HI level plug. END This is what it states word for word in the manual. Not sure what type A tranny fluid is any more if its type 3 or 4 which is now the norm. This manual is for the gas engine version so I dont know if the engine rpm thing (see #3 above) would be right or not but Im assuming Idling is what matters & not reving up. The oil temp to me seems fairly hot as remember water boils at 212 F so I would be careful. Also can you post some more pictures of the whole machine from a few different angles? A freind of mine has a Massey-Ferguson 470 which is the same machine & Ive just found another massey that I think he wants to own as well. Does your serial no. plate say if yours was made in st.Thomas, Ontario or in michigan? Thanks
As I recall, the breather is really a check valve. It is designed to let air in so that there is never a vacuum in the system. As soon as you get a negative pressure, you can suck dirt in around the shaft seals. These breathers had a bad habit of losing the plastic poppet which would allow oil to come out of the breather and make a mess. Take the breather apart and have a look, otherwise just replace it with a breather/check valve.
Thanks 61BG & oldseabee - I would say you have both hit the nail on the head - I believe the breather (pic 2) is just a breather so i will go get one that is a check valve also & then i will make sure the oil level is setup correctly. Appreciate the feedback & will let you know in the next couple of days how i went. Will send a couple of pics then too 61BG & check place of manufacture. Thanks
Ok - so i didn't think it would be so hard to find a combo breather / check valve. I noticed in the parts manual (now that i know what i'm looking for) that the check valve is a separate item that the breather screws into. I was wondering along the lines of using a hydraulic in line check valve that has a 5 psi crack pressure? Would 5 psi be too much?? And would it actually allow a vaccuum to form seeing as it is really just a oneway valve?? I tried the Minnpar website for the p/n 227265 but no luck there - It may be a bit difficult now to find oem equipment for an old m/c down here so will try to cobble something together (as long as it petends to work in the same way as the original) Cheers Jimbob
Update Ok so I still haven't been able to get a breather with a two way check valve in - the national donaldson distributor recognises the part no's I found from one of their online catalogues but have never had it in the country & purolator also make them but don't have a distributor downunder. Oh well, have to make one out of #8 fencing wire . Good tip on checking the oil level while it's running (makes sense when every automatic trans in a car requires to be checked that way) - makes a huge difference on the amount of oil in the trans. From what I have gleaned from various sources, the trans & torque converter are connected and share the same fluid & I guess therefore the same fluid level. The parts guide for 45 loaders shows the check valve into the top of the torque converter with the breather on top of it. The position of this happens to be around the same height that the current breather has been exteded to on the transmission & when going downhill the breather is below the level of what seems to be the correct position for the breather on the torque converter - which then leads to some fluid loss as seems to happen when changing direction quickly or giving it some curry. What I have done is to make an extension tube for the breather taking it up another foot to try to help and will see if it still requires a check valve after trying it out. No photo of that yet - will see how it goes.
Just to be clear, the breather is a one way check valve. It allows free flow of air into the system but blocks air or oil from going out.
Just a quick rundown on how the system works. The charge pump mounted on the convertor, draws oil out of the bottom of the transmission (Sump), and feeds the clutch pressure regulating valve first, building up clutch pressure in one of the clutches, (there is always one speed clutch engaged). Once clutch pressure is built up, the clutch pressure regulating valve shifts to allow the balance of flow into the convertor members where they do their thing (The convertor will not operate until clutch pressure is attained) and supplies oil to the bearings in the convertor housing. The lube oil then runs down into the convertor case and gravity drains it back to the transmission sump. If you have excess leakage in the convertor members shaft seals or a crack in one of the members, you can get excess oil into the convertor housing faster then it can drain back to the transmission. The oil that is traveling through the convertor members exits the convertor and goes to the oil cooler in the bottom of the radiator and then back to the transmission sump.
Thanks oldseabee - we have got a one way breather/check valve on there now & it seems to be able to hold down its oil - appreciate your help Jimbob