CK35 HST Engine Stop Solenoid Fail

   / CK35 HST Engine Stop Solenoid Fail #11  
Take the bad one with you to the auto parts store to be sure the connector will fit. Going to a higher amp rating (e.g. 40 or 50) is fine and may make the part last longer. But don't go to a lower amp rating (lower than 30). The SS pull coil draws 26 amp, as I recall. The stock relay 30/20 rating means the normally-open contacts are rated for 30 amp; those are the ones that feed the SS. The normally-closed contacts (not used in this case) are rated for 20 amps.

There are three of these relays. The two identical ones power the starter solenoid and the SS. The odd one (with higher 60 amp rating) feeds the glow plugs. For some unknown reason, at least one other owner who switched connectors reported that the relay that wouldn't pull the SS still worked fine for the starter. But that may not last. If it were me, I'd replace a marginal or unreliable relay while I'm thinking about it.

ADDED: This being the second such report (swapping connectors fixed no-crank or no SS retract) I wonder if the problem could be high resistance at the connector (from dirt, grease, corrosion, etc.) that got polished by removing and reconnecting the connectors?
 
Last edited:
   / CK35 HST Engine Stop Solenoid Fail
  • Thread Starter
#12  
Everything is working fine now that I switched the two relays. I'll probably just replace both to be sure.
 
   / CK35 HST Engine Stop Solenoid Fail
  • Thread Starter
#13  
Well, that was short-lived. The bad relay started to fail intermittently the second day so I replaced it with the four pin, 30 amp unit from O'Reilly. Works fine so far.
 
   / CK35 HST Engine Stop Solenoid Fail #16  
Just adding my experience. I have a 2013 Kioti DS4510HS and 2 days ago I had the exact same problem. Wouldn't start. Pulled the stop solenoid and it started. Tested everything with a meter. Couldn't find anything wrong. Replaced the stop solenoid relay with the starter relay and it worked fine (didn't try the reverse). Just ordered a 4 pack of 5 prong 40/30amp relays from Amazon for $10 and they'll be here in 2 days. Had it not been for this thread I would have bought a new stop solenoid. I'm thankful for this thread!
 
   / CK35 HST Engine Stop Solenoid Fail #17  
Take the bad one with you to the auto parts store to be sure the connector will fit. Going to a higher amp rating (e.g. 40 or 50) is fine and may make the part last longer. But don't go to a lower amp rating (lower than 30). The SS pull coil draws 26 amp, as I recall. The stock relay 30/20 rating means the normally-open contacts are rated for 30 amp; those are the ones that feed the SS. The normally-closed contacts (not used in this case) are rated for 20 amps.

There are three of these relays. The two identical ones power the starter solenoid and the SS. The odd one (with higher 60 amp rating) feeds the glow plugs. For some unknown reason, at least one other owner who switched connectors reported that the relay that wouldn't pull the SS still worked fine for the starter. But that may not last. If it were me, I'd replace a marginal or unreliable relay while I'm thinking about it.

ADDED: This being the second such report (swapping connectors fixed no-crank or no SS retract) I wonder if the problem could be high resistance at the connector (from dirt, grease, corrosion, etc.) that got polished by removing and reconnecting the connectors?
In my case, my 2010 LK30 wouldn't spin its starter. Swapped stop and starter relay and tractor started and stopped fine. Put the relays where they were, starter wouldn't spin again. Tried swapping again, worked fine. Tried a couple more times and can reproduce it 100% of the time. Dealer replaced the starter relay and it has worked fine since. Go figure...
 
   / CK35 HST Engine Stop Solenoid Fail #18  
Those relays fail more than you think. My cab tractor uses the same relays for breaks, lights, wipers, etc. some are dual relays some single relays. Ive replaced 4 different ones over 9 years. I have spares in shop now.
 
   / CK35 HST Engine Stop Solenoid Fail #19  

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