B7100 won't start

[RoPie]

I have a 1995 B7100 that won't start. It cranks over very slow, not fast enough to fire up. Tried jumping it thinking the battery was dead, but no change. Pulled off the starter an it seems to spin normally when not attached to the tractor. Any ideas? I'm halfway through a drainage project and was hoping to get done this weekend

 

[sandyc]

Make sure all of electrical connections are dry and tight look at the ground straps as well. All connections should clean

 

[RoPie]

Make sure all of electrical connections are dry and tight look at the ground straps as well. All connections should clean

Tried that before pulling the starter off. Everything looks clean and tight. Even connected the jumper cables directly to the lug on the starter. Still cranks too slow

 

[sandyc]

I would guess that the starter is bad. Bushings. Can't think of anything else

 

[Kubota81]

Have u tried getting your charger hooking it up to your tractor and putting it on 240 cranking amps then you will be able to see if your starters wore because it would be turning over faster than usual on the 240 cranking then on regular

 

[Cooter88]

make sure all of your hydraulics are in neutral position, especially the three point lift lever. You don't want the hydraulics going over relief while cranking.

 

[RoPie]

Managed to get it started by letting it crank for couple minutes after making sure the fuel lines were purged. It ran fine, but when I tried starting it today, same problem. Battery is now totally dead so I was jumping it with my Jeep. The cables were getting hot. Could the starter be going? It spins fast when not attached to the tractor, so I thought I ruled that out

 

[dixiedrifter]

I recently had to replace the starter on my M9000. Brushes were worn out plus I think it had a bad field coil/and or short in the armiture or whatever. If it were me I'd yank the end of the starter off and look at the brushes. Could be that they are rusted frozen in their little housings and not getting good contact with the armiture.

 

[dragoneggs]

I hate electrical and I am not an expert here, but I understand if your engine is cranking over even slowly, it is probably not your starter. This is what turns your flywheel. First check your battery for full charge/power, Cold cranking Amps. Maybe worn brushes, but I would start elsewhere and check your battery, and any relays.

 

[Kanook]

Are you sure your pre-heat....Glow Plugs.... are functioning?

 

[Tig]

Based on what you have told us, I'm with the get the starter fixed crowd.
Brushes, bushings or windings can all cause slow crank on an engine that runs fine. Find a shop that rebuilds starters for an economical fix.

 

[Rocky Hoffler]

Since it did start and after it sat did not want to run I would check and see if fuel is draining back to tank via a check valve or a leak in fuel lines letting air seep in. plus how cold is ambient temp may need glow plug help.

 

[RoPie]

I got it started again today. Same problem, slow to crank over. I cracked the fuel lines open, cranked it until fuel began to leak, then retightened them. It fired right up. I have a new fuel filter on the way, could my lines be plugged? Would that cause the engine to crank over too slow to start?

 

[RoPie]

I got it started again today. Same problem, slow to crank over. I cracked the fuel lines open, cranked it until fuel began to leak, then retightened them. It fired right up. I have a new fuel filter on the way, could my lines be plugged? Would that cause the engine to crank over too slow to start?

The only way I can get it to start is to bleed the fuel lines, then it cranks fast enough to start.

 

[gengine]

If you have to bleed air from your fuel lines, you have a fuel leak somewhere. I'm not familiar with your tractor, but if you can't find a leak, then I suspect the lift pump is letting air into the system. Slow cranking is a different issue. Cheapest is check ground from battery to block, and then positive to starter. If those are good, remove the battery and take to a parts house and have it tested. It will save you time if you charge the battery before you bing it in. If the battery tests good, then go for the starter. I just had one re-built for $60, which is easier to swallow than the $230 parts house cost.

 

[Egon]

Is the clutch depressed when cranking?

 

[calman93611]

One of the tricks I learned is when the engine is cranking slow, then make sure you pre-heat, then pull the de-comp out, turn on the starter, it should now turn over really fast because their is no compression, then push in the de-comp and it should start. In a pinch, I also use WD-40 as a starting fluid since it is a very light oil.