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PostPosted: Fri Jul 01, 2011 1:43 pm 
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drmini in aust wrote:
Nope there is vacuum there, as the pump is well above the oil level and has to suck it up.


But there is enough to pull oil through the mesh?


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PostPosted: Fri Jul 01, 2011 2:06 pm 
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Sure, unless you never change the oil... and you sludge it all up..

The mesh is much the same as what's on the standard strainer, there is just less surface area. Plenty there really, my 1412 runs 100psi on a cold morning and 70-75psi hot. 8)

[edit] Here's Wombat's modified one after I silver soldered some standard filter mesh to it.
The heat source for this was my Makita hot air gun, works great and doesn't burn the mesh. :P

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The latest ones from Minispares (redesigned by keith calver) just have a plain 90° cut end pointing horizontally. Some engine builders reckon they can suck air, but I've seen no evidence.

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PostPosted: Fri Jul 01, 2011 2:26 pm 
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drmini in aust wrote:
If you are a spirited driver and you can't afford or it's inconvenient to fit a centre pickup, my advice is keep the oil level ABOVE the full mark, at all times. Particularly so on rodchange boxes.
Low oil = no oil pressure on RH bends = stuffed big end bearings and worn crankpins. I've stripped a few low mileage engines that suffered for this reason.


Doc,

what would be an appropriate level above full? when does it become too much oil in the sump?

excuse my ingnorance, why does rodchange make a difference?


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PostPosted: Fri Jul 01, 2011 2:30 pm 
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500mL or so extra oil is fine,

Rodchange box has NOTHING in the LH side, all the others have a selector fork mechanism. Not that this makes a heap of difference...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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PostPosted: Fri Jul 01, 2011 2:34 pm 
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Just be a little careful about adding extra oil. It will lead to shorter gearbox bearing life.

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PostPosted: Fri Jul 01, 2011 2:35 pm 
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drmini in aust wrote:
500mL or so extra oil is fine,



i wonder if the extra oil will increase my consumption rate...

more oil = more height = more pressure (my oil consumption is casued by gravity when car is sitting still ie leaking!) :D


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PostPosted: Fri Jul 01, 2011 4:18 pm 
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GT mowog wrote:
Just be a little careful about adding extra oil. It will lead to shorter gearbox bearing life.

As Pauline said, please explain???

500mL won't make any difference IMO, it'll drop to the full mark soon enough. :lol:
Would be different if it was so full the crank was dipping in and aerating it, but it won't with this amount.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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PostPosted: Fri Jul 01, 2011 4:22 pm 
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You can always change the gearbox bearings while you are fitting a new crank.
Then you can fit a centre oil pick-up while it is all apart. :lol:


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PostPosted: Fri Jul 01, 2011 6:11 pm 
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drmini in aust wrote:
GT mowog wrote:
Just be a little careful about adding extra oil. It will lead to shorter gearbox bearing life.

As Pauline said, please explain???

500mL won't make any difference IMO, it'll drop to the full mark soon enough. :lol:
Would be different if it was so full the crank was dipping in and aerating it, but it won't with this amount.


500ml probably won't make that much difference, however, if the oil level is too high, like over half way covering the bearings, it will cause them to run considerably hotter and even more oil = more heat = shorter life or in the extreme, failure.

I mention this here, because some of the guys might figure that if a little extra is good, then more has gotta be better. Not so.

There is a MAX mark on the dip stick for a reason.

<EDIT> Here's a little reading from the manufacturer's

http://www.jp.nsk.com/app01/en/ctrg/ind ... i_A105-113

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Last edited by GT mowog on Fri Jul 01, 2011 7:28 pm, edited 1 time in total.

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PostPosted: Fri Jul 01, 2011 6:52 pm 
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So you are saying not to increase the oil level, to keep it at the max mark and let the engine bearings take care of themselves because you wouldn't want to hurt the gearbox bearings....

Ok, I'm fine with that. :lol:


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PostPosted: Sat Jul 02, 2011 12:44 am 
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Production Information - Landcrab Owners Club International
www.landcrab.net/mainframes/main_production.htm - CachedLandcrab Production History ... Early models suffered from high oil consumption due to a wrongly calibrated dipstick, gears proved difficult to select ........

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