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Massey Ferguson 175 PTO

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civilianwilly
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PostPosted: Mon Jul 06, 2015 5:56 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

Okay. That's exactly what my bird brain needs. Pictures and diagrams with colors and letters and numbers lol. I got the top cover off (pic) I cant see anything that is wrong or out of place except when i loosened the left cover i did not get the alignment bolt back in the housing and it rubbed some on the shaft when i moved it into the work area. What is the next step? Just to recap I have IPTO and it has a BRAND new pump in it which is awesome but doesnt work. and yes i removed the little roller before pulling the top cover. It was so easy to pull and replace with the cherry picker i put it right back on to keep the dirt out. Once again thanks EVERYONE for all the help and advice. Let's get this one done!


 
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civilianwilly
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PostPosted: Mon Jul 06, 2015 6:02 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

Its IPTO
 
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Tom from Buckeye Lake
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PostPosted: Tue Jul 07, 2015 4:18 am    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

That very small line in you picture goes to the left side cover and has a tap for a gauge connection. Oil pressure should be around 125-150 psi with the lever in the forward position. The pump is driven full time by a shaft from the spline in the clutch pressure plate. "New Pump" you say, I ran mine with the lift cover off (at idle) to observe the operation of the IPTO clutch and brake. The brake will NOT stop the PTO with a load IE; Brush Cutter. It is just to hold the shaft from turning in the off position.

As to the main pump hydraulics, I notice you have a valve mounted on the lift cover (forward, right side). Could it possibly be shifted into the diverted position to supply oil to aux equipment? If so, the lift arms will not work in that position. In the picture I posted, mine has a simple diverter valve supplying oil to the four way valve. Yours looks to be all in one valve.

There are many folks here that have more knowledge than I. I do hope they chime in.
 
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civilianwilly
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PostPosted: Tue Jul 07, 2015 7:37 am    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

I know exactly what port you are talking about. I see it on the left cover and it is a 9/16" plug with a rubber o-ring. I cracked this loose and started the tractor. Although I could not do the "test the pressure here" aspect of it I know that it should pump fluid out of that and it is not. This leads me to believe there is a disconnect at the driven shaft. In essence the shaft that drives the pump is not turning or spinning for whatever reason. Please advise.
 
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Dieseltech
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PostPosted: Tue Jul 07, 2015 9:06 am    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

The auxiliary pump gets its drive from a gear on front of the scotch yoke pump, if neither one runs then the drive is lost either in the transmission or at the input spline area, possibly stripped splines at the clutch cover, or sheared rivets on the cover/PTO drive hub..
 
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civilianwilly
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PostPosted: Tue Jul 07, 2015 9:23 am    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

Dieseltech wrote:
(quoted from post at 10:06:13 07/07/15) The auxiliary pump gets its drive from a gear on front of the scotch yoke pump, if neither one runs then the drive is lost either in the transmission or at the input spline area, possibly stripped splines at the clutch cover, or sheared rivets on the cover/PTO drive hub..


so I need to split the engine away from the Trans to verify?
 
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ptfarmer
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PostPosted: Tue Jul 07, 2015 11:32 am    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

There is plate on the bottom of the bellhousing that's bolted on, you should be able remove it, and look around. With a light, and one of those small inspection mirrors you maybe able to see something. Sometimes broken clutch parts maybe laying on top of that bottom cover.
 
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Dieseltech
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PostPosted: Tue Jul 07, 2015 2:56 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

With the top cover off watch the scotch yoke three point pump with the engine running at idle, the two piston blocks should move back and forth IF the pump is being driven. No movement means drive to the pumps is lost somewhere. I'd look at the split torque pressure plate drive for stripped splines or sheared drive hub rivets. Should be able to see something through the bottom clutch inspection plate. Also hope the last mechanic did not forget the splined hydraulic drive coupler gear, it's not likely though as it's part of the auxiliary pump drive..
 
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civilianwilly
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PostPosted: Tue Jul 07, 2015 4:41 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

Dieseltech wrote:
(quoted from post at 15:56:22 07/07/15) With the top cover off watch the scotch yoke three point pump with the engine running at idle, the two piston blocks should move back and forth IF the pump is being driven. No movement means drive to the pumps is lost somewhere. I'd look at the split torque pressure plate drive for stripped splines or sheared drive hub rivets. Should be able to see something through the bottom clutch inspection plate. Also hope the last mechanic did not forget the splined hydraulic drive coupler gear, it's not likely though as it's part of the auxiliary pump drive..


okay slow down there. we start talking scotch egg yokes aND piston blocks I get a little lost lol remember I am the color and number and diagram guy. so I need to start the tractor and attempt to use the lever and watch for something to move?
 
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Dieseltech
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PostPosted: Tue Jul 07, 2015 6:27 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

No levers need to be moved, but with the engine at idle you should see the oil churning in the three point pump as the piston blocks move back and forth IF the pump is turning. It may help to drain a gallon or two to see the blocks easier. Still sounds like NOTHING is turning..
 
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civilianwilly
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PostPosted: Tue Jul 07, 2015 6:31 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

Dieseltech wrote:
(quoted from post at 19:27:59 07/07/15) No levers need to be moved, but with the engine at idle you should see the oil churning in the three point pump as the piston blocks move back and forth IF the pump is turning. It may help to drain a gallon or two to see the blocks easier. Still sounds like NOTHING is turning..


drained four gallons and started and let idle. nothing moved or churned or even gurgled. this has got to mean something. I just don't know what. hopefully not expensive.
 
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Dieseltech
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PostPosted: Tue Jul 07, 2015 6:42 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

To me it means there's a drive loss, I'd check the clutch pressure plate cover first, could be the PTO input drive hub that's riveted to the cover has sheared rivets or stripped splines. If all is OK then I'd remove the transmission from the differential case and check the drive there. You should be able to see the input shaft turning through the bottom inspection plate if all is well there.
 
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lee231
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PostPosted: Tue Jul 07, 2015 6:56 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

Agree with DT that the pressure plate probably is stripped. The outer input shaft to the transmission drives off the pressure plate, the PTO, main hydraulic pump and the aux hydraulic pump(which drives the IPTO and remote hydraulics). You probably need to split the tractor at the bell house to fix it. HTH's Lee
 
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civilianwilly
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PostPosted: Thu Jul 09, 2015 12:14 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

lee231 wrote:
(quoted from post at 19:56:49 07/07/15) Agree with DT that the pressure plate probably is stripped. The outer input shaft to the transmission drives off the pressure plate, the PTO, main hydraulic pump and the aux hydraulic pump(which drives the IPTO and remote hydraulics). You probably need to split the tractor at the bell house to fix it. HTH's Lee



okay. I'll split it at the back of the engine and post results. going to be awhile due to weather tho stay posted
 
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civilianwilly
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PostPosted: Thu Jul 09, 2015 1:00 pm    Post subject: Re: Massey Ferguson 175 PTO Reply to specific post Reply with quote

guys I went to put the oil back in the tractor and I took the filler plug off. inside u can see all the linkage and gears right thru the filler hole. I started it and looked inside and a shaft way down low is spinning and oil is slinging everywhere. this has to mean something. the disconnect must be between there and the pump right?
 
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