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PostPosted: April 26th, 2015, 4:30 pm 
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Joined: June 17th, 2007, 12:23 am
Posts: 125
Location: Brisbane, Australia
The topic of discussion of this post is based around the T630/900 Kubota engine. I have been seeing more and more problems where some try to do the right thing but by the end create more problems than they intended to repair. The problem we have found is that when a unit runs out of diesel a common practice is to crack open the injector lines and turn over the engine until diesel comes out. Typically this is done one cylinder at a time and should be only done at the last point of connection, at the injector. This being said the proper bleeding process is to open the knurled screw on the end of the pump assy and allow the lift pump to cycle air through the pump back to tank. This will get most if not all the air out. The problem that is costing an absorbent amount of time and money is when the line on top of the injector pump is loosened. If the clamp (marked with an “X”) is not holding the injector cartridge 100% tight then just the act of loosening or tightening can clock the cartridge enough to make the timing of the injector to become off. The end result is that you will have a dead cylinder. I’ve marked in the pict what a twisted cartridge looks like. This particular unit needed to be taken to an injector shop and bench tested and tuned so as to be able to reinstall. My intent of this post is to make sure everyone knows what’s going on when a simple procedure isn’t followed as outlined in the engine manual. Please reply to this post if you have anything else to add or if I have missed some facts.
Thank you,
DR


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PostPosted: April 28th, 2015, 8:25 am 
Thanks for the information, Dave! I think that is extremely valuable and should help save time and money for some folks down the road.


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