Foxy
Well-Known Member
'simple' question......
When measuring oil using dipstick, insert fully or rest on threads........
cheers
Patrick
When measuring oil using dipstick, insert fully or rest on threads........
cheers
Patrick
km35P gearbox
- Thread starter Foxy
- Start date
VicS
Well-Known Member
As a general rule
If it just pushes in push it in fully.
If it screws in just let it rest in position on the threads without screwing in
BUT check with the owner's manual to be sure
If it just pushes in push it in fully.
If it screws in just let it rest in position on the threads without screwing in
BUT check with the owner's manual to be sure
Foxy
Well-Known Member
Good general rule, thanks. in happy yanmar manual style, I have two options ;-)
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coopec
N/A
Surely this has got something to do with it?
View attachment 58222
I don't know anything about the gearbox but ½ liter of oil is not a lot. Couldn't you check the level of the oil with a screwdriver to get an idea of whether the dip stick should be screwed in or left to rest?
View attachment 58222
I don't know anything about the gearbox but ½ liter of oil is not a lot. Couldn't you check the level of the oil with a screwdriver to get an idea of whether the dip stick should be screwed in or left to rest?
macd
Well-Known Member
Yes, RFM.
Because there are exceptions to the general rule, as Vic implies.
PRM80, a pretty common box, is one of them: the dipstick screws home for level testing.
Foxy
Well-Known Member
Surely this has got something to do with it?
View attachment 58222
I don't know anything about the gearbox but ½ liter of oil is not a lot. Couldn't you check the level of the oil with a screwdriver to get an idea of whether the dip stick should be screwed in or left to rest?
Not sure how Id do that. There is only one mark on the dipstick and its about 5mm up from the bottom. The idea is (obviously) that then oil rests in this section. My problem is that I have seen/received two different yeanmat instructions for measuring the oil - the first says to screw the stick back in, the second says to rest it on its thread whilst measuring. its a significant difference and Im keen to get a definitive answer if poss. Guess you are suggesting I drain then refill with 0.5l of oil then measure. Good idea. think I have to suck the oil out though so id be a bit worried it hadnt all come out. what do you think?
Cheers
Pat
coopec
N/A
Pat
I have never seen a KM35P gearbox so I'm just trying to work things out logically. Your motor is probably about the same size as my Perkins 4.108 so that gives me some perspective. I've down loaded a few pics and I think I have a better understanding
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View attachment 58224
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Half a liter of oil is not much (two tea cups) so it is not going to be very deep in the bottom of the box when it is at the correct level. Actually I wasn't suggesting you drain the box and then refill it but maybe that is not a bad idea. You couldn't get a LED (very powerful) torch and look to see if you can find oil once you had drained it?
Maybe it is better to run it a bit overfilled than dry so I'd be inclined not to screw the dipstick in. There has been a few threads on this problem and that seems be the consensus.
http://www.cruisersforum.com/forums/archive/index.php/t-123143.html
http://www.sailnet.com/forums/diesel/74033-yanmar-transmission-dipstick-question.html.
pvb
Well-Known Member
According to the Yanmar operator manual, the dipstick should be be fully reinserted when checking the oil. If it unscrews, this would mean screwing it back in, not just resting it on the threads.
coopec
N/A
Can you give us a link to the PDF Manual for the KM35P Gearbox? (I can find plenty of manuals for the motors but not the gearbox.)
View attachment 58226
Clive
VicS
Well-Known Member
Yanmar manuals which cover the KM35P gear box, in which the dip stick screws in, specifically state that the oil level is checked without screwing in the dipstick.
Yanmar manuals which describe only the KMH4A gear box make no mention of screwing or unscrewing the dipstick but state that it should be fully inserted when checking the oil level.
Conclusion. In the OP's case the dipstick should not be screwed in when checking the oil level!
Would have added some links to the Yanmar manuals but the BB connection went down and cannot now find what I was reading!
EDIT : See pages 41 and 42 here http://www.yanmarmarine.com/theme/y...ration-manual/JH5/JH5_EN_operation-manual.pdf
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pvb
Well-Known Member
Well, here's the thing, Vic, your Yanmar manual gives different advice from the one I looked at! On the left, the extract from your manual; on the right, the extract from the manual I looked at.
Quite how Yanmar can get so confused is anybody's guess!
coopec
N/A
I couldn't agree more.
I wonder if 4. Fully reinsert dipstick means you don't screw it in? So to be sure there is enough oil you shouldn't screw it in seems logical. Surely a slightly overfilled gearbox couldn't do any damage?
VicS
Well-Known Member
Yes I found that other manual as well. AFAICS it refers to the KMH4A gear box only. I assume that its dipstick does not screw in
The manual i linked to refers to several gearboxes, including the KM35P , which is the subject of this thread. It clearly says do not screw the dipstick in when checking the oil level. Therefore I'd say if the KM35P dipstick screws in then you don't screw it in to check the level.
If someone can post a link which specifically says that the KM35P dipstick should be screwed in when checking the level It will indeed be confusing!
pvb
Well-Known Member
You didn't look at the manual very carefully - it refers to the KM35P gearbox. On the left, the extract from your manual; on the right, the extract from the manual I looked at.
Now you'll notice that the saildrive references in your version are newer, so it would seem that at some point Yanmar changed their instructions regarding the dipstick. For someone who has an engine supplied with the earlier operating manual, presumably the instruction to fully reinsert the dipstick still applies.
VicS
Well-Known Member
Thats not in fact the other manual I found. I thought it was at first. This is the one I found http://www.manualslib.com/manual/764896/Yanmar-3jh4e.html#manual See pages 40 and 41
If its newer manuals that refer to reading the oil level with the dipstick not screwed in perhaps this is a correction of an oversight or omission in the earlier manuals or reflects a change in the dipstick design from pushed in to screwed in.
If the OP has an earlier engine then we need a manual that says the dipstick ( of a KM35P) should be screwed in to read the oil level before one can conclude that to be the correct procedure.
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pvb
Well-Known Member
I give up, Vic. You post definitively quoting one manual, then say it wasn't that manual and quote another one. At least you've now recognised that Yanmar have issued two conflicting recommendations.
macd
Well-Known Member
Have we perhaps just discovered why there's an expletive in 'RFM'?
pvb
Well-Known Member
VicS
Well-Known Member
No
I said I'd looked at two manuals .. but had lost the links to both. I subsequently found one and posted the link as an Edit.
You found a different one ......initially I thought it was the other one of the two I'd previously been looking at ...... but it wasn't, it was just a pink herring that confused me initially.
I then found the second one of the two and posted a link to that.
The two manuals I was originally comparing are
http://www.yanmarmarine.com/theme/y...ration-manual/JH5/JH5_EN_operation-manual.pdf which refers to the KM35P gearbox, and others, and says that the dipstick should not be screwed in when checking the oil level.
and
http://www.manualslib.com/manual/764896/Yanmar-3jh4e.html#manual whch appears to only refer to the KMH4A box and makes no mention of screwing the dipstick in either to check the oil level or when finally refitting. I conclude that the dipstick in the KMH4A just pushes in and is not screwed at all.
I don't believe these two conflict each other. When the dipstick merely pushes in it is pushed in fully to read the level ....as is logical. When it is screwed its is not screwed in to read the level .. just the way it is.
It is simply the change from a push in dipstick on the KMH4A to a screw in dipstick in the KM35P which is confusing you.
Right I was late cooking lunch but having cleared up this confusion I am not going to be late for tea!
pvb
Well-Known Member
Is this a 5 minute argument? I've already said I've given up on this story of Yanmar's different recommendations. I've posted the extracts from the manuals. If you want to keep on pushing, fine.