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November 24th, 2004, 06:27 AM   #1
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Conrod bearing lubrication

Hi,

Which models lubricate the conrod bearing through an oil duct in the crankshaft?
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November 24th, 2004, 08:02 AM   #2
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Re: Conrod bearing lubrication

Originally Posted by mikst
Hi,

Which models lubricate the conrod bearing through an oil duct in the crankshaft?
Hi Mikael,
2001 and later.

Regards,
Dale
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November 27th, 2004, 09:58 AM   #3
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Since all parts are within the tolerances, radial play less than 0.02mm crank pin/conrod, I will not divide the crankshaft. However, I cannot feel any oil duct at all??? I have no hole for oil to the counter balancer bearings either but I don't know if there should be in my model, -02.
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November 27th, 2004, 10:34 AM   #4
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Oil enters the left end of the crankshaft via the clutch cover as a result of pump pressure. Oil is delivered to the big end bearing via a hole bored 90 degrees to the pin axis. 02 Models do not have a spray bleed for the balance unit as do the 04 and and 05. 2004 and 2005 models no longer have a screw in oil restriction fit to their crankshaft as said restriction is now incorporated into the crank end.

Dale
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November 27th, 2004, 11:00 AM   #5
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Originally Posted by LINEAWEAVER
Oil enters the left end of the crankshaft via the clutch cover as a result of pump pressure. Oil is delivered to the big end bearing via a hole bored 90 degrees to the pin axis. 02 Models do not have a spray bleed for the balance unit as do the 04 and and 05. 2004 and 2005 models no longer have a screw in oil restriction fit to their crankshaft as said restriction is now incorporated into the crank end.

Dale
Hi Dale,

Since you are removing the balancer from my 04 550 crank, should I do something about the spray bleed for the balancer. I still have to consider lubrication of the inner bearing on the shaft that drove the balancer. If I grind off the integral gear on the shaft the spray bleed oil distribution would be different than if I leave the gear on won't it? Or doesn't it matter?

Joe
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November 27th, 2004, 11:44 AM   #6
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Hi Joe,
Lubrication delivery via the balance spray orifice is marginal at best and as a result questionable with regard to it being of any real value even with the balance assembly intact.

For what it may be worth:
Pre oil pump Husaberg lower ends proved quite durable even with 65 RWHP and a sustained operating RPM exceeding 9000.

It is of my personal opinion that the balance assembly is nothing more than a clattering mass of of power robbing diaster potential. Continued improvement regarding material and design may enhance longevity, however, the big question still remains "why pursue an issue which serves no purpose ?"

Sincerely,
Dale
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November 27th, 2004, 01:22 PM   #7
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Hi Dale,how much is the vibration level changed when the balance assy is removed and does the crank have to be rebalanced after its removal....nsman
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November 27th, 2004, 01:33 PM   #8
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Originally Posted by nsman
Hi Dale,how much is the vibration level changed when the balance assy is removed and does the crank have to be rebalanced after its removal....nsman
Since the topic of engine vibration is subjective and influenced by several factors other than that of the engines reciprocating mass I rely primarily upon seat of the pants feedback. To date the general consensus has ranged from no noticeable difference to that of much overall smoother running. The later I attribute more to reduced straight cut gear clattering than that of an improved balance factor.

The crankshaft indeed must undergo considerable modification including that of balance and proper main bearing spacing.

Hope this helps.

Sincerely,
Dale
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November 27th, 2004, 10:46 PM   #9
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I suspect I am swindled.
I have tried to check the hole in the crankshaft many times.
I used steel wires, 1 mm and 0.25 mm thick. The depth I can measure is around 13 mm. Shouldn’t the hole follow the centre line of the shaft?

Nevertheless, it seems to work without the duct. But, will this give problem in the future? Any advantages without the duct? “2004 and 2005 models no longer have a screw in oil restriction fit to their crankshaft” What is this? I cannot see any on the crank nor in the parts manual. I don’t know what I am searching.
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