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Old 02-01-2018, 07:33 AM   #41
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CD oil is only different from CC oil in the amount of detergent in the oil.

Detergent is not oil, is not a lubricant and is hardly needed in a tranny .

Straight 30wt-40wt or for our Twin Disc 50wt non detergent is still easy enough to obtain.
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Old 02-01-2018, 08:09 AM   #42
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I use synthetic 5-30 in my Velvet Drive.
Came to that decision after a long conversation with one of the very seasoned tech guys at my local VD distributor and a bearing engineer I worked with at the time.
Made the change after I rebuilt the tranny.
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Old 02-01-2018, 10:55 AM   #43
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Thanks for replies!

Auskiwi - info on the CAT oil would be useful when you can provide it.

Commodave - Amazon started here with much fanfare and nervousness from competitors last Dec. But they have pretty much flopped so far, not much range and no engine/gear oil, prices often not competitive.

I can source some 30W oil, but not sure of spec at this point. One is Castrol 4T, a 30W oil for 4 stroke lawnmowers. Another is Prolube. I have never heard of them but their product would seem to be suitable.
https://prolube.com.au/shop/diesel-e...ae-30-cd-sf-3/

The major oil suppliers eg Shell don't appear to routinely carry it in outlets, but likely it can be ordered in.

Hi
Yes this oil meets your requirements SAE30 and C3 as well as API CD.

I also looked at the Shell wheel T1 30W to meet the TO-2 and C3 rating as Twin Dick requirements, as I mentioned earlier.

NBs
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Old 02-01-2018, 11:12 AM   #44
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Freudian slip?

What do you mean, I do not understand?

Nbs
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Old 02-01-2018, 11:26 AM   #45
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I use synthetic 5-30 in my Velvet Drive.
Came to that decision after a long conversation with one of the very seasoned tech guys at my local VD distributor and a bearing engineer I worked with at the time.
Made the change after I rebuilt the tranny.
You mean an engine lube oil I assume.
Why not use an oil intended for transmissions or gears?
haha what’s a VD distributor? Names not necessary.
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Old 02-01-2018, 06:00 PM   #46
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What do you mean, I do not understand?

Nbs
It's Twin Disc, not Twin Dick......
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Old 02-02-2018, 11:01 AM   #47
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It's Twin Disc, not Twin Dick......
ok,

I did not notice writing mistakes even if English is not a native language, so I guess I know which error I wrote ... I first wondered where a bug, thank you for clearing my mistake.

NBS
only single Twin disc and...
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Old 02-02-2018, 06:02 PM   #48
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My Mechanic used a Caterpillar branded 30 wt oil in my twin Disc boxes, I will check the account to confirm when I get back to my boat, The oil was sourced in Brisbane
Hi Auskiwi, did you have your boat serviced a few weeks ago? I’m pretty sure I walked passed your boat at Runaway Bay and saw oil containers on the back deck, I noticed it as I too have a Riviera aftcab but mines the 35 version
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Old 02-02-2018, 06:13 PM   #49
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North Baltic does very well on TF, we can see you are translating,it can`t be easy,and I for one value your posts.
"Freudian slip" is difficult to explain, you should google it. Named after English psychiatrist Sigmund Freud, relates to psychoanalysis, and the significant "accidental" but revealing use, of a word or phrase.
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Old 02-02-2018, 07:13 PM   #50
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Austrian, my dear Bruce, not English. Just sayin'
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Old 02-02-2018, 09:42 PM   #51
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I have Twin Disc 506 trannies. It is recommended to use SAE 30 oil in them, which I've been doing. My usual source for oil only has it in stock occasionally, but I could order it in advance no problem.
.
I use the same.

Have you tried Gibbs truck parts on Lytton rd?
http://www.gibbsparts.com.au

20 litre drums of Synforce brand that they have on hand for the trawler guys.
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Old 02-02-2018, 10:24 PM   #52
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I use the same.

Have you tried Gibbs truck parts on Lytton rd?
Truck Parts - GIBBS - Transmissions, Gearboxes, Driveshafts, Diffs and Spare Parts for Trucks

20 litre drums of Synforce brand that they have on hand for the trawler guys.
I'll try them next time. But it will be a while. TD say 1000 hrs between changes, or 6 mths. I do every 500 hrs.
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Old 02-03-2018, 01:51 AM   #53
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Austrian, my dear Bruce, not English. Just sayin'
You are right. And here`s me with Viennese grandparents.
But, he relocated to the UK, where he died. His son Clement was a prominent UK citizen. My checks show he was in fact a neurologist, but being regarded as the father of psychoanalysis, psychiatrist gets fairly close.
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Old 02-03-2018, 02:06 AM   #54
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I'll try them next time. But it will be a while. TD say 1000 hrs between changes, or 6 mths. I do every 500 hrs.
Would be interested to see what Kevin has to say about it, I must admit, I never asked just made the assumption when I called Gibbs and asked for 30 mono and they said " you must have a trawler" that it was the goods.

We have a monster box - a 516, holds around 30 litres and weighs around 720kg dry which reminds me, time to pump her out and change the filter.
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Old 02-22-2019, 06:31 PM   #55
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Twin Disc Gear Oil .. changes

Researching this a bit I came across this doc from Twin Disc.. seems they have withdrawn some recommendations..
https://www.transauto.se/wp-content/...VpmG2YWJKYxgkc


Thoughts after reviewing?

Also found this https://www.pacificdriveline.co.nz/A...ENDATIONS.aspx
has capacity and oil viscosity recommendations , which seem to be consolidation across models of Twin disc
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Old 02-23-2019, 07:35 AM   #56
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The hassle with multigrade is it is usually thin as water until it heats up.

Great for starting a big diesel in below freezing conditions where cranking speed counts.

Not so great for clutch packs that are operated by hyd fluid pressure.
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Old 02-23-2019, 07:02 PM   #57
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I contacted Twin Disc technical department directly about this, and they echoed what was said above: a multivis will quickly break down under the shear of the gears and you'll have something close to the lower number. That is why they are insistent on a single vis oil.
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Old 02-23-2019, 07:35 PM   #58
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Fluid for TO-2 specification:

https://www.walmart.com/ip/Super-Tec...allon/16213442


I didn't see if anyone made the distinction between SAE and ISO fluid ratings.


Quote:
Originally Posted by hzjcm8 View Post


Hope this helps !!!

Excellent explanations, thanks.
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Old 07-10-2019, 01:51 PM   #59
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I contacted Twin Disc technical department directly about this, and they echoed what was said above: a multivis will quickly break down under the shear of the gears and you'll have something close to the lower number. That is why they are insistent on a single vis oil.
Having done some deeper research, I found this to be an old wives tale. Good synthetic oil does not shear into the lower grade. Switched our 501's to Amsoil 15/40 diesel oil and they have been happy and quieter for over 1,500 hours.

Sidebar- Twin Disc sent me a spec sheet that required 2 out of three items present to comply.
1 was motor oil, 2 was gear oil and 3 was motor oil.
At the very bottom of the spec sheet it said "used motor oil in good condition may be used."
Go figure .. .
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Old 07-10-2019, 02:07 PM   #60
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NightCrawler,

Go figure what?
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