How to stop the bar chain oil leak

indicates incorrect length chain in use
the adjustment slots should be about 1/3 when fitted moving close to 1/2 when adjusted
the correct adjustment is when the chain in the center of the bar is lifted up the bottom segments of the chain are still in the bar groove
make sure that the oiler hole is not blocked from saw dust and chips

Hi, What Kind of oil do You use? A thiker one could be a solution.
Usualy there a other screw (than those H and L of the carburator) to adjuste the amount of oil spend on your blade.

is the tin plate on the right way?(not blocking the hole)did you change the bar and the replacement blocking the oiling hole

There are two hoses, the delivery hose and the pick up hose, to remove the delivery hose, start by removing the chain brake ( make sure is de activated before removing by pulling the hand guard fully back to the top handle ) now remove the clutch, there are two cut a ways in the clutch centre so as to insert a flat screw driver, now strike the end of the screw driver with a suitable hammer to jar the clutch off against the compression of the saw ( the clutch is just spun onto the crank with a left hand thread ) once off remove the sprocket and bearing, now remove the screw securing the silver protection plate over the bar pad and remove it, you can now just lift away the delivery hose, to replace the pick up you will have to remove the screw securing the oil pump and remove it, the pick up hose has a moulded grommet in the centre so you will have to diss lodge it to pry the hose from the oil tank, check out the web for sellers of these components, the part no.s are below.

The 455 has a 3 position adjustable oil pump, the adjuster screw is up under the crankcase, sprocket side, you need a flat blade screw driver.

not sure if the 455 rancher is the exact same as my rancher but when the oil feed on my saw seems slow i remove the chain and bar and clean the chain grove. pay special attention to the end that is near the motor there are a couple of places that allow the oil to flow from the saw body to the chain groove and then subsequently to the chain

An “OM, 455e Rancher, 455 Rancher, 460 Rancher, 2009-09, EN, FR, ES” Follows (may not be your saw):
http://weborder.husqvarna.com/order_static/doc/HOUS/HOUS2009/HOUS2009_1151382-49.pdf
An excerpt from page 38 of the above OM follows (forcing it may render it inoperative):
Adjustment of the oil pump
Adjustments are made by turning the screw using a screwdriver or combination spanner.
The machine is supplied from the factory with the screw set to position 2.
Turning the screw clockwise will reduce the oil flow and turning the screw anti-clockwise will increase the oil flow.
Recommended settings:
• Bar 13"-15": Position 1 (full CW)
• Bar 15"-18": Position 2 (center)
• Bar 18"-20": Position (full CCW)
These recommendations apply to Husqvarna’s chain oil, for other chain oils increase the oil flow by one step.
WARNING! The engine must be stopped when making adjustments.

All OMs and IPLs can be found here:
HusqvarnaUSA.com
http://www.husqvarna.com/us/homeowner/support/download-manuals/
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – useful when downloading IPLs and Manuals
06 1500198
06 = year produced – 2006 (single digit before 2000; please contact Husqvarna for single digit clarification http://www.husqvarna.com/us/homeowner/support/customer-support/)
15 = week produced – March
00198 = 198th unit Husky produced that week

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

check the hose that goes to the oilway if everything checks clear you may have a crack in your oil tank due to excessive vibration and weak molding.

If it is spitting oil out, then your chainsaw is working properly. When it stops spitting oil out, then you have a problem. However, on the bottom of that particular saw you will find a little hole with a picture of an oil can next to it. You can adjust the lubricant output via the screw located at the bottom of that hole but, keep one thing in mind; the harder the wood or working conditions your saw is being exposed to the more oil will be necesary to keep your saw running smoothly and your chain from prematurely dulling.

Also make sure that where the oil is pumped against the side of the bar that the oil port (little hole) that feeds oil into the bar's slot is clear. Mine would go through a tank of oil with each tank of gas, but the chain wasn't getting oiled until I cleaned out this little hole.