Case IH MXM 155 Turns over but won't start

FeliciaS.

New Member
Hello!

My husband has been having troubles with our mxm 155. It will turn over but won't start.
He's tried changing the fuel filter, he's cracked the injectors, checked all the wiring..
He did manage to get it running a few times and it worked fine for a day or 2 and then it just wouldn't start again. When he did get it running when it was idling it would sound like it was stuttering a little bit.
Any ideas would be greatly appreciated!!

Thank you so much.
 

Drillman

Member
Mixed Farmer
Is the electric fuel pump working? Turn the ignition on and you should hear it buzzing. If you remove the fuel filter and do that it should spew fuel everywhere.

My TM155 eats them.
 

FeliciaS.

New Member
If its the same as a TM155, there is a coldstart electric thing on the back of the pump which when faulty causes odd symptoms.

Is the electric fuel pump working? Turn the ignition on and you should hear it buzzing. If you remove the fuel filter and do that it should spew fuel everywhere.

My TM155 eats them.

Thank you for your replies!
The electric fuel pump is working when we turn the key on it does buzz. As for the cold start electric thing on the pump, He's actually replaced the fuel pump and the back plate (The whole assembly) on it with one from our TM190.. they both were almost identical with just a tad smaller fuel filter. There was no luck when he tried that, it did the same thing.

He has the proper amount of fuel going to the injector pump, (I think it was 1.5 litres per minute from the fuel pump). When he opens one of the injector lines at the injector pump the fuel only shoots out about a foot.. should it have more pressure than that? We also have fuel going to all the valves when he cracked them. One time he got it going he was playing with the turbo line (he thinks it was the turbo line) going to the top of the engine. If all this sounds good and normal we are assuming maybe its an electrical issue.

Thanks again :)
 

Lincsman

Member
Arable Farmer
Location
Lincolnshire
Thank you for your replies!
The electric fuel pump is working when we turn the key on it does buzz. As for the cold start electric thing on the pump, He's actually replaced the fuel pump and the back plate (The whole assembly) on it with one from our TM190.. they both were almost identical with just a tad smaller fuel filter. There was no luck when he tried that, it did the same thing.

He has the proper amount of fuel going to the injector pump, (I think it was 1.5 litres per minute from the fuel pump). When he opens one of the injector lines at the injector pump the fuel only shoots out about a foot.. should it have more pressure than that? We also have fuel going to all the valves when he cracked them. One time he got it going he was playing with the turbo line (he thinks it was the turbo line) going to the top of the engine. If all this sounds good and normal we are assuming maybe its an electrical issue.

Thanks again :)

whats a turbo line?
If its injecting diesel at the right time it runs, not sure what your problem is... timing slipped... can it slip?..
 

FeliciaS.

New Member
I'm sorry I must have misunderstood my husband when he was telling me.. It was a line that goes to the thermostat (which is beside the turbo). Since we do have fuel going everywhere it needs to be going, we are assuming that its electrical or a sensor somewhere that is not allowing the engine to start. Was just curious if anyone else has had this problem or any similar problems :)
 

Mur Huwcun

Member
Livestock Farmer
Location
North West Wales
These have a throttle cable same as SWB TMs? 190 will have electric injector pump. 155s have a stop solenoid on injector pump, that's the only electrical bit involved, they will run with the cold start disconnected., check the connection on the stop solenoid, if it's ok, to eliminate it remove solenoid, remove plunger inside and re fit. Tractor will then NOT stop with the key, he will have to stall the engine or run it out of fuel by disconnecting the fuel pipe before the electric lift pump (the one on the fuel filter). Has he tried giving her a whiff of easy start when someone else is cranking her over? If it goes on the easy start then it's definitely fuel related.
 

Drillman

Member
Mixed Farmer
These have a throttle cable same as SWB TMs? 190 will have electric injector pump. 155s have a stop solenoid on injector pump, that's the only electrical bit involved, they will run with the cold start disconnected., check the connection on the stop solenoid, if it's ok, to eliminate it remove solenoid, remove plunger inside and re fit. Tractor will then NOT stop with the key, he will have to stall the engine or run it out of fuel by disconnecting the fuel pipe before the electric lift pump (the one on the fuel filter). Has he tried giving her a whiff of easy start when someone else is cranking her over? If it goes on the easy start then it's definitely fuel related.
I would remove the guts of the stop solenoid then see what happens. Iirc i've had to do that to one of ours at some point in the dim and distant past.
 

FeliciaS.

New Member
These have a throttle cable same as SWB TMs? 190 will have electric injector pump. 155s have a stop solenoid on injector pump, that's the only electrical bit involved, they will run with the cold start disconnected., check the connection on the stop solenoid, if it's ok, to eliminate it remove solenoid, remove plunger inside and re fit. Tractor will then NOT stop with the key, he will have to stall the engine or run it out of fuel by disconnecting the fuel pipe before the electric lift pump (the one on the fuel filter). Has he tried giving her a whiff of easy start when someone else is cranking her over? If it goes on the easy start then it's definitely fuel related.

Thank you for the advice! He will try this :)
We have tried easy start, and did get it to "sort of" of start after using a full can of it! But it shut off right away.
Would the solenoid still cause problems if there's fuel going into the injector lines? (Unless maybe the plunger doesn't go all the way up and its not quite getting enough fuel?)
 

Tractorstant

Member
Location
Monaco.
Do these have a lift pump on them? Was common issue on a MXM 175/190 looked like you were getting fuel etc as the injector would pull some up. The shaft used to snap inside.....a certain size Alan key just about was a quick fix.
 

FeliciaS.

New Member
Do these have a lift pump on them? Was common issue on a MXM 175/190 looked like you were getting fuel etc as the injector would pull some up. The shaft used to snap inside.....a certain size Alan key just about was a quick fix.

There is a lift pump :) Thank you for this advice as well! We will try both ideas tonight and post results :)
 

Mur Huwcun

Member
Livestock Farmer
Location
North West Wales
Thank you for the advice! He will try this :)
We have tried easy start, and did get it to "sort of" of start after using a full can of it! But it shut off right away.
Would the solenoid still cause problems if there's fuel going into the injector lines? (Unless maybe the plunger doesn't go all the way up and its not quite getting enough fuel?)

No, it would usually not inject anything or not enough. It should run on even a squirt of easy start for a second or two. What happened, did it just stop one day or has it just refused to start one morning?

Has the injector pump been off? Has anyone done anything to the timing at all? I has a 130 that snapped the mounting bolts, locked pump, removed and extracted bolts, re fit and unlocked pump but it would not start. Something had moved. Had to remove it again and set the timing by the book to get it going. It's on a tappered shaft without a keyway.
 

Timbo

Member
Location
Gods County
Ok.. If I read right and the engine will not fire on easy start or brake cleaner- you have an internal engine problem, possible cam timing problem, or serious issue that prevents any cylinder firing .

We've established the lift pump is providing fuel to the IP, and that the engine still doesn't run with the guts of the stop solenoid removed, and that the intake & exhaust isn't totally plugged?

If it will run on easy start- whilst cranking do you get any white smoke out the exhaust? You say you get fuel at the injector(s) with the line cracked open. If there is white smoke go looking for an injection pump timing issue.
If no white smoke, then I'd suspect the internal charge pump or the drive shaft to it has broken (you'll get fuel out of an open line, but not through the restriction of an injector.

VE pumps are usually fairly reliable, but I've known them to break.
 

gwspark

Member
Hello!

My husband has been having troubles with our mxm 155. It will turn over but won't start.
He's tried changing the fuel filter, he's cracked the injectors, checked all the wiring..
He did manage to get it running a few times and it worked fine for a day or 2 and then it just wouldn't start again. When he did get it running when it was idling it would sound like it was stuttering a little bit.
Any ideas would be greatly appreciated!!

Thank you so much.

Check the fuel filter heads, there is a screw top on them which can be removed, they suck dirt up from the tank and it gathers there.

Had this problem before and was scratching my head for a while before actually figuring it out.
 

FeliciaS.

New Member
No, it would usually not inject anything or not enough. It should run on even a squirt of easy start for a second or two. What happened, did it just stop one day or has it just refused to start one morning?

Has the injector pump been off? Has anyone done anything to the timing at all? I has a 130 that snapped the mounting bolts, locked pump, removed and extracted bolts, re fit and unlocked pump but it would not start. Something had moved. Had to remove it again and set the timing by the book to get it going. It's on a tappered shaft without a keyway.

The injection pump is on there solid. It does shoot fuel out of the injector pump itself (when he takes off the injection hose) but only shoots it about a foot.. he's not sure if that's high enough pressure or not.

The story of the tractor.. We've had it for 10 years, put 7000 hours on it. Only have had to normal maintenances on it with a single problem, until last year the PTO clutch (I think) was broken, and had a friend re build it. The PTO still slowly turns when not engaged.. but has done this for a year and had no problems with the tractor.

About a month ago, the fuel lift pump wouldn't even come on. My husband realized it was the sensor for the water, so he drained the water from the fuel filter.. It started right up and we used it for a week, then the same thing happened again, so he drained it again.. it was right full (it looked like diesel), The pump started working again but the engine wouldn't start. So we put a new fuel filter on, switched out the entire pump with our TM190 to see if that was the problem.. still with no luck. Strangely enough, by messing around with it we've gotten it to start 3 different times, but it stutters a bit while its idling (We have it in a heated shop so its always warm). He's taken the fuel line off the tank and put it directly in a jug to check the lines for cracks or holes, still same thing.
When we used the ether to try to start it, it just ran off the ether.

Thanks sooo much for all your help, we really appreciate it :)
 

Mur Huwcun

Member
Livestock Farmer
Location
North West Wales
Ohhh, sound like water has then entered the injector pump and unfortunately damadged it, as it's a rotary injector pump it only has one plunger and water causes damadge to the plunger through microscopic rust spots. It's injecting but maybe not enough. You need the engine spinning over as fast as possible for any chance of firing I would guess. If it goes then you will need to empty and drain fuel tank of all contents and fill with clean diesel, new filters etc and add a good glug of two stroke oil directly into fuel filter and pray for the injector pump!!
 

FeliciaS.

New Member
Ohhh, sound like water has then entered the injector pump and unfortunately damadged it, as it's a rotary injector pump it only has one plunger and water causes damadge to the plunger through microscopic rust spots. It's injecting but maybe not enough. You need the engine spinning over as fast as possible for any chance of firing I would guess. If it goes then you will need to empty and drain fuel tank of all contents and fill with clean diesel, new filters etc and add a good glug of two stroke oil directly into fuel filter and pray for the injector pump!!

This makes sense :)
Even if the injector pump is shot, you've gotten my husband laughing! Thank you!! hehe
 

Mur Huwcun

Member
Livestock Farmer
Location
North West Wales
This makes sense :)
Even if the injector pump is shot, you've gotten my husband laughing! Thank you!! hehe

Ha!! A trick with the older CAV injector pumps were to tap them with a copper or wooden mallet when someone was cranking them over, sometimes it would help the plunger move a little bit more but if it's injecting a foot it should definitely run
 

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Five nature-recovery projects spanning 100,000ha launched

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Written by Michelle Martin from Agriland

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Five nature-recovery projects spanning nearly 100,000ha across the West Midlands, Cambridgeshire, the Peak District, Norfolk and Somerset have been announced by the government and Natural England today (Thursday, May 26).

This is the equivalent in size to all 219 current National Reserves.

The aim of the projects is to deliver nature recovery at a landscape scale, helping to tackle biodiversity loss, climate change and improve public health and well-being.

All five projects will make a significant contribution towards the national delivery of the international commitment to protect at least 30% of land and...
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