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post #1 of 14 (permalink) Old 02-14-2019, 07:17 AM Thread Starter
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Question starter motor problem

first post not about my santa fe! my neighbour lent me his really old bobcat to move some earth (3 cyl diesel). It started a few times (with difficulty, slow cranking and needed jumpers) but now it wont start at all even with 14v showing when its jumpered to my santa fe. All I get is a click from the starter solenoid. Ive tested the starter with a screwdriver directly on the starter motor contacts, here is the result:
Fat contacts: starter spins (does not engage obviously).
Solenoid contact: solenoid engages but starter doesnt spin.
I can turn the motor by hand with a wrench on the crank, so its not locked. When I turn it I hear the starter solenoid click back in place. Ive cleaned battery terminals and earth contacts on motor.
To me the symptoms are like its not getting enough juice but I have checked everything - i think!
Question: is it possible for the starter to spin, no load but still be bad?
thanks

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post #2 of 14 (permalink) Old 02-14-2019, 02:18 PM
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Originally Posted by scoobykids View Post
Question: is it possible for the starter to spin, no load but still be bad?
Yeah that's a possibility.

But it might not necessarily be the starter motor itself that's faulty. The other thing that will cause your symptoms is burnt contacts inside the solenoid cap. If you can bridge all three terminals on the solenoid together see if than makes it crank. If so it's the contacts inside the solenoid cap that have failed. You can often buy a replacement cap which comes with new contacts. Failing that you'd need to replace the complete solenoid.

Typical Starter Solenoid Cap

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post #3 of 14 (permalink) Old 02-14-2019, 04:42 PM Thread Starter
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I don't think it's going to be possible to buy as solenoid alone. this is the starter https://rover.ebay.com/rover/0/0/0?m...2F113594278549

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post #4 of 14 (permalink) Old 02-14-2019, 05:35 PM
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You need a new starter.

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post #5 of 14 (permalink) Old 02-14-2019, 06:15 PM
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I don't think it's going to be possible to buy as solenoid alone.
That's looks like a Delco 5MT. You can buy replacement solenoids for those, and replacement caps too :

STARTER MOTOR SOLENOID - 12V DELCO REMY TYPE 5MT/22MT

Cargo 130497 - Delco 5MT Solenoid Cap
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post #6 of 14 (permalink) Old 03-08-2019, 03:33 AM Thread Starter
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starter porblem solved

ok, I replaced the starter and the bobcat starts now.

afterwards I disassembled the old one to see if I could find the cause of the problem. The high current contacts in the solenoid are operated by a large copper washer being pushed into them to close the circuit. This large copper washer was filthy dirty with oily grime. The contact were also dirty. I haven't cleaned/repaired/tested it yet but it matches the symptoms so I'm pretty sure its solved.
Thanks all for advice.

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post #7 of 14 (permalink) Old 03-08-2019, 04:23 AM
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Thanks all for advice.
Thanks for taking the time to post back and confirm my suspicions.
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post #8 of 14 (permalink) Old 03-11-2019, 11:31 AM Thread Starter
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bobcat slower and slower, stalls and wont start now :-(

1986 bobcat: starter fixed last week. worked for a while.
now it only runs 1/2 hour before the motor gets slower and slower, then stops.
Its a (ryobi?) 3 cylinder diesel with old fashioned fuel pump/discributor and gravity fed fuel tank.
Sometimes it starts after I let it sit 1/2 hour.
Any ideas gladly welcome?

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post #9 of 14 (permalink) Old 03-11-2019, 12:11 PM
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Venture fuel filter wont flow to keep up with fuel consumption

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post #10 of 14 (permalink) Old 03-11-2019, 12:19 PM
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Sounds like it’s running out of fuel.
Injector pump fuel filter on diesel are critical, any idea if it has been changed recently.

Is it running winter or summer diesel. Could try fresh diesel fuel.
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