Author Topic: 550XP Oiler problem  (Read 1208 times)

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Offline user10

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550XP Oiler problem
« on: June 23, 2014, 07:59:22 pm »
Greetings everyone.

I've had this saw for close to a year and have been happy with it.
Changed from the OEM 16" bar to an Oregon PRO LITE 160SLGK095 with the 20LPX066G (.050, .325) chains that I have been running.
Suddenly, all my chain oil is running out around the bar and blowing back over the pump and the chain is all but dry.

I removed the pump and oiler hose, cleaned everything. Verified that the pump was working and oil was coming out the hose - running without the bar.
Oil holes in bar are clear to the chain channel.
Reassembled, and same thing.

Cleaned everything again, replaced the pump and hose - oil everywhere, but little on the chain.

I even put a .010" shim under the hose to make a better seal against the bar and didn't help.

I measured the oil hole distance from the bar center slot and found that the Oregon bar oil hole is better than .020 further away from the centerline of the bar than the OEM bar oil hole is.
That puts the edge of the hole on the edge of the opening of the oil tube, but as best as I can see, the hole is still covered.

Has anyone seen this before  ???

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Offline Bluegill

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Re: 550XP Oiler problem
« Reply #1 on: June 24, 2014, 10:41:40 am »
If it only happens with the new bar, then I'd say the bar is the problem.

I usually make the oil holes larger on the new bars, by drilling them out with a 1/8" bit.

Offline KilliansRedLeo

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Re: 550XP Oiler problem
« Reply #2 on: June 24, 2014, 11:55:38 am »
+1 on its the bar. The very fact that oil is going everywhere except where it should says the pump is working. Drill out the bar.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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Offline SawTroll

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Re: 550XP Oiler problem
« Reply #3 on: June 24, 2014, 05:23:45 pm »
Surely it is the bar - but I find it odd that Oregon makes such a mistake....

Offline user10

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Re: 550XP Oiler problem
« Reply #4 on: June 25, 2014, 04:42:08 pm »
Sorry, I was away...

I took some measurements comparing the Oregon bar to the OEM bar.
Seems that the drive link channel is at maximum tolerance for the 0.050" bar.
In addition, the channel is significantly deeper than the OEM bar.
The geometry is not similar to the OEM bar.
 
So it appears that the drive links aren't picking up oil as they should, and a lot of oil is being pumped toward the rear.

Check image -
You can see that the Oregon oil hole is larger than the OEM bar which operated correctly.
The bottom of the Husky channel (center lamination) occludes half of the oil hole, but it forces oil into the links.
Also, if you look closely, the imprint of the oil tube cavity misalignment is apparent.

I've spoken with Blount (Oregon) tech support. They are investigating and are actively pursuing a solution.
Frankly, I was surprised at the immediate response and attention. Excellent customer service - wow. 
I'm confident that they will get the bar geometry dialed in to work with the 550XP.

          They don't actually test the bars on every model of saw - some assumptions are made.

In the mean time, what bars do you run on your 550XP's ?


 

Offline 660magnum

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Re: 550XP Oiler problem
« Reply #5 on: June 25, 2014, 05:13:25 pm »
Those are not current design bars
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
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Offline KilliansRedLeo

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Re: 550XP Oiler problem
« Reply #6 on: June 25, 2014, 09:51:06 pm »
[+1 Jim, I agree
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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Offline 660magnum

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Re: 550XP Oiler problem
« Reply #7 on: June 25, 2014, 10:09:17 pm »
My experience with bars like the one on the left is that there is a DIP in the middle lamination right where the oil hole is. The groove is not that deep all the way around.

We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline user10

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Re: 550XP Oiler problem
« Reply #8 on: June 26, 2014, 08:27:48 pm »
I purchased 2 of these and some chains from Frawley's (loggerchain.com) last fall.

Oregon tech support got a larger version of this pic. They didn't mention anything about versions. Maybe when they get back to me?

The groove is close to 8mm deep all around and 10mm at the oil hole ("Lubri-Dam").

The drive link is 6mm to the tip; not sure how the fluid dynamics calculations would work out. I'm using Jonsered branded bar oil.

The Husky bar is thin and flat in profile, the Oregon is thicker, more rounded and wider.
Don't really want another Husky bar.

Do you have a preference of bars for the 550?

Offline Cut4fun .

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Re: 550XP Oiler problem
« Reply #9 on: June 26, 2014, 09:15:26 pm »
The husky bar should be a oregon bar too. Just a different version?

Just go look at K095 mounts for bars.



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