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Re: MF135 lift cover removal to fix lift piston rings and ti

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07-17-2014 08:47:33

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Your best bet is to have a helper with small hands retain the dashpot plunger (if it pops out you get to fish for it) MF is supposed to have wedge (MF 270B) to hold it in place.

On the lift cover a engine hoist of some sort is your best friend (that sucker is heavy). Also get 4 very long bolts that have the same threads as the bolts that hold the lift cover on, cut the heads off of the long bolts (using them as guide when pulling, and installing the lift cover because the lift cover needs to go straight up, and straight back down). Take the roller pin out before pulling, and install it after you re-installed the top cover. To take the roller pin out, and in you have to spread the arms just enough to get it in, and out (spread them too much it will break one of the arms).
Take you time, and don't rush it.
Getting the piston out, and back in is not too hard.

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DavidP, South Wales

07-18-2014 11:30:41

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 Re: MF135 lift cover removal to fix lift piston rings and ti in reply to ptfarmer, 07-17-2014 08:47:33  

Hi everyone,
I would have to take issue with ptfarmer over a number of issues in his reply.When the hydraulic cover is inverted during removal using the MF tools the dashpot piston can fall out. The special tools consist of a framework to allow the cover to hinge on the hinged pin lugs at the rear of the centre housing and a pillar to use as leverage which becomes a stand for the cover when removed. This allows safe and easy working and access.

The easiest solution to prevent the plunger falling out is to place an elastic band around the plunger body and over the adjusting screw. The elastic band can be cut and removed once the cover has been refitted.

The dashpot piston wedge will NOT hold the plunger in place. It is not designed to do that. The purpose of the 270B is to prevent the dashpot piston (not plunger) moving during adjustments.

"4 very long bolts" may well prevent you removing the hydraulic cover. The cover has to move rearwards slightly before it can move upwards. If you look at the front of the hydraulic cylinder you will see it is profiled to fit up close to the front part of the cover face. The correct 7/16" unc studs should protrude no more than 1 1/2" above the upper face of the centre housing. A turned or ground taper is useful but they should also have a slot cut for a screwdriver to remove them. It is essential that the cover does not move when it is in its location. The gasket can become damaged it is moved.

The attached image shows a page from the MF adjustments book. The roller removal tool consists of a spring clip at the end of a small handle. This is essential to prevent the roller falling under the pump. You may be lucky to fish it out but if not it will mean removal of the cover again at least. It is difficult to open the legs of the pump lever so take the greatest of care.

DavidP, South Wales

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07-18-2014 16:02:00

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 Re: MF135 lift cover removal to fix lift piston rings and ti in reply to DavidP, South Wales, 07-18-2014 11:30:41  
Excellent information, especially as to the "dashpot plunger" and how to secure it. I will not have the special tools to remove the lift cover so I will use shorter bolts to line it up for the removal and re-installation. I will take pics of it all.

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07-18-2014 16:15:31

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 Re: MF135 lift cover removal to fix lift piston rings and ti in reply to robilmichael, 07-18-2014 16:02:00  

As an aside David, I have had this tractor for 12 years and it has been excellent with no problems at all. I live in Pennsylvania, USA, and it is not uncommon for it to get to 0 F. in the winter. Even at that temperature, the tractor (perkins diesel) starts within the first revolution and it doesn't have any glow plugs, heater or use of any help. Quite impressive. I also must say that it uses very little fuel. It is by far, the best tractor that I have owned in this size and range (Ford Jubilee, Ford 861 gas, Ford 3000 diesel, and Case 480ck). I have also put a front end loader on it. I will post pics of the repair.

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07-17-2014 11:19:59

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 Re: MF135 lift cover removal to fix lift piston rings and ti in reply to ptfarmer, 07-17-2014 08:47:33  
I found that when re-installing the roller pin, you can tie a string to it and tape it in place so that if you drop, you don"t have to start over and retrieve the roller pin from the bottom.

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07-17-2014 09:00:25

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 Re: MF135 lift cover removal to fix lift piston rings and ti in reply to ptfarmer, 07-17-2014 08:47:33  
Excellent idea about the bolts. About how long should they be? 6"?

The manual says to "retain the dashpot plunger" (whatever that is, I assume it will be evident when I remove the side cover). Can I just use a piece of wire to hold it in place as I lift out the cover.

I do not have an engine lift but I can use some pulleys hanging from a beam to lift it out. Sounds like it might be difficult to lift it straight out using the long bolts as a guide.

Thanks again for the excellent ideas.

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