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Old 10-22-2018, 07:52 PM   #1
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Dropped tube in Yanmar transmission

Hello,
I am trying to help a fellow boater who was working on his engine, taking an oil sample from his transmission. The sample pump slipped and the 12" plastic tube slid down into the transmission. He has been able to grab it a few times with a 4 finger grabber but now cannot find the tubing.
Any suggestions or tricks?
He cannot remove the oil drain plug (he needs a special short socket to fit).
The yanmar is a 3JH5 (54hp) I think.

Thank you
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Old 10-22-2018, 09:32 PM   #2
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Drain the oil. The look for it. If you can't see it. Amazon has a ton of small bore scopes that will plug into a smart phone. You may be able to fish it closer to hole then use a flexible retrieval tool to get it.
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Old 10-23-2018, 05:02 PM   #3
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He is finding that drain plug requires a shallow or short socket because it is very narrow in there. He has a bore scope on order from Amazon.
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Old 10-23-2018, 05:31 PM   #4
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If you find the socket is too thick. Take it to a machine shop and have them cut the od down. I have done it multiple times for myself and other techs.
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Old 10-23-2018, 05:40 PM   #5
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I would be inclined to just leave it there. Unless there are oil-ways to be clogged, a chewed up plastic tube will not do too much harm and will come out at an oil change.
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Old 10-23-2018, 08:19 PM   #6
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Plan A. A short length of piano wire or single strand telephone wire with the end bent over will hook the tube enough to pull it under the opening. Then he can use the grabber tool. Try to grab the loose tube by the very end. It will come out easier.
Plan B, drain the oil and use a small tube taped to the end of a shop vac hose. the vacuum will hold tube against tube enough to drag it to the opening.
Plan C, if Plan A finds the end of the tube but too slippery to grab, then insert the telephone wire into the tube all the way until it comes out the outer end. Hopefully there will be enough friction to keep the tube on the wire and get it out.
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Old 10-23-2018, 08:22 PM   #7
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Do not leave it in there! It wouldn't take much ground up plastic to block the oil pick up screen.
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Old 10-23-2018, 08:39 PM   #8
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THe other thing I can think of that could get screwed up with plastic bits is the control valving. If those ports get plugged you won't have shifting untill you remove the debris.

I don't know your gearbox but most control valves in any hydraulic system are far smaller than the main working or power lines.

True a screen may stop the bulk of it, but why take the chance.
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Old 10-23-2018, 10:51 PM   #9
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Quote:
Originally Posted by D.Duck44 View Post
I would be inclined to just leave it there. Unless there are oil-ways to be clogged, a chewed up plastic tube will not do too much harm and will come out at an oil change.
Not the best approach.
There are small orifices that could be easily clogged by chewed up plastic bits, donít risk it!
I just read a thread about a guy who lost the bottom part of his dipstick, heís now contemplating removing the transmission.
Hope your situation is resolvable without that!
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