Service & Maintenance Question
I have a 455 Rancher that has had constant oiler problems....escalated
Service & Maintenance Question posted March 30, 2013 by Alan B
5350 Views, 19 Comments
Question:
I have a 455 Rancher that has had constant oiler problems. I recently had to replace the oiler and replaced the damaged worm gear at the same time. I also replaced the hose that supplies the oil to the bar, but don't know how to pull out the pickup hose. If I can get needle nosed pliers into the oil tank that far, do I pull it away from the insertion point? Is it something that can then easily be pushed back into the hole after it is cleaned or replaced?
Answer
Alan,
The oil pump pick up and screen are removed with the the removal of the pump, they are all attached as one unit.
You also were so close, If you have already replaced the oil pump gear, so go back to removing the oil pump gear. Then remove the silver metal guard plate with one screw in the middle, when you remove this plate you will see the entire oil pump mechanism. Remove the bolt about mid way in the oil pump mechanism, then carefully pry the entire pump mechanism out of the saw casing. The oil pick up will come out with the pump. Then clean everything, and reverse these steps to put it all back. Oh, don't forget to clean the oil tank out good too!
I would Not recommend dissasembly of the oil pump, once you have it removed, with the exception of the oil pump screen, there are way too many little parts, unless you have a detailed parts diagram. (see attached diagram)
I hope this helps.
PS. There are two types of oil pumps, the top picture is Non adjustable oil pump, bottom picture adjustable oil pump (refer to owners manual, if you have adjustable oil pump for making adjustments)
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Hi Karla,
Thank you for your quick response. I think I used the wrong terminology for the hose I am referring to. I'm actually talking about the suction hose that runs from the oil tank to the oil pump, not the hose that goes from the pump to the bar. The workshop manual describes it on page 30 as the oil suction hose. That is what I'm trying to figure out how to remove. Thanks for any info on this.
Alan
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it's indicated as '2' in the jpg you had attached.
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Alan. Yes - Item 2, screen and tube are all part of the pump, when you remove the pump you will remove the tube and screen from the oil tank. Its all one part, and the entire mechanism will come out. Follow my directions in the previous post, and when you are done you will see how it goes into the oil tank as well.
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OK, thanks Karla. I guess I was afraid of using too much force is removing the suction hose. I will try again this weekend.
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Here is another picture, which may help you!
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Thanks Karla. What I need to do is to pull the hose out from the oil tank. According to the previous page of what you posted in the manual:
"When dismantling the screen, remove the oil hose from its clip on the underside of the oil tank. Pull the screen loose from the hose". I have to find this clip and remove it so that the hose will pull out. It's not actually attached to the pump, it gets held to the pump once the pump is bolted to the crankcase. I think I need to get a better look at the underside of the oil tank to find that pesky clip. Thanks for your help, I will let you know how I make out.
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I think this is a typo or grammar problem, there is No clip "underside of the oil tank", When you remove the oil pump there will be a grommet that the oil line goes through, this is shown in diagram just above item "2", but that will come out with pump, oil line and screen. (all one unit) However, If you want to replace the oil line then once out of the chainsaw, on the underside of pump and above grommet you will need to take "clip" off and disconnect hose. The only thing that may feel like something is holding the oil line and screen is the grommet, but that will pop out.
I think the directions could be a little clearer, again hope this helps.
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Thank you, that is exactly what I needed to know. I was worried about pulling to hard on the hose and breaking something. Now I understand and can go ahead and pull it out with more confidence. Thank you very much, I will let you know how I make out this weekend.
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Another picture, this may be a little clearer:
You can see the grommet about half way up the hose on the IPL drawing, the clip is part of #15 that holds the hose on, and the screen item #16, is at the bottom of the picture.
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OK, great. I bought a screen to install because the original part didn't have one, which is probably why I'm having the issue in the first place. I'll try to blow out whatever's in the hose, install the screen and reinstall the hose.
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Here is one more picture of the actual suction line which may help, and as you take the pump out, you may have to pop that grommet out if it doesn't pull out with the pump.
I haven't had any problems with my 455 chainsaws' oilers, they do leak a little oil when I put them away. I am assuming that your pump is not pumping oil at all ? or Just very little ?
I will have to look at the tank IPL, and see if there is a "Duckbill Vent" on the oil tank, that would stop it from oiling if the vent was bad, jus a thought.
Please let me know what you find as the problem, Thanks!
Again, I like pictures so hope this helps
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Alan,
There is a Duckbill vent, and a cover over the vent, Parts #10, and #11 for oil tank.
I would remove these and clean them and make sure the duckbill is not full of sawdust and oil, and its working OK.
This is the only picture I could find, which is from the opposite side of the chainsaw, it should look like a small 3/16 inch hole with usually a red or black rubber duckbill stuck in the hole, and works like a check valve and allows air into tank but keeps oil from coning out, it may have a foam cover over the duck bill to keep it clean.
Husqvarna part number:
VALVE-CHECK (DUCKBILL) | .
Again, Please let me know what you find to be the problem!
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Thank you, the picture is very helpful. The problem with my 455 is that it's not pumping at all. I first noticed this last fall. When I took it apart I found that the pump was frozen and the gear was stripped. I replaced both but I still wasn't getting any oil. This time I brought it to an authorized dealer, they ordered another gear and maybe cleaned the hoses, I should have found out exactly what they did. The oiler worked for one session, then broke again. So this time I'm trying to blow both hoses out, and was in the middle of trying to remove the suction hose when I found this site and posted my question. I did one test prior to attempting to take the hose out. I ran without the bar to see if any oil was coming out of the pump. It was dry.
I hope I can send a final note on Saturday telling of a successful outcome. I will also be making sure the bar is cleaned up. Thank you.
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Hi Karla, I hadn't seen your latest post when I answered the prior post. I will find the vent, I wouldn't be surprised if it is clogged. I know I have to be better from now on about cleaning the saw each time I use it.
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Hi Karla,
Good news, I was able to finally get the oil pickup hose out. What helped me get a hold on it and pull it the rest of the way out was by removing the bolt that holds the chain catcher and vibration damper in place. I was able to get enough room to get needle nose pliers in to pull it out. After cleaning I tried to put the replacement screen over the original part but there is nothing that the part can clasp onto, so I didn't put it on. I will have to buy a new pickup hose fitted with a screen. When I put everything back together it still didn't work, but I realize, though hard to see, the plastic gear is stripped again. I will have to buy a few of them so I won't lose time everytime one gets stripped. I did verify that the pump works just by moving the gear with my hand and seeing oil coming out of the hole. Anyway, at least I know the pickup hose is allowing oil to pass to the pump.
Thank you for all of your guidance!!!!!
Alan
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Alan,
Thanks for the update and the additional information on dissassembly of the oil pump.
I am curious about why you are stripping gears, there shouldn't be a lot of resistance for that gear Not to turn very easily.
Are you sure you are getting the gear engaged properly between the pump and the chain sprocket. I just checked the service manual and they don't give much guidance for putting it all back together. If I remember correctly there is a little trick that you have to get the tabs in the gear to align with the drum sprocket that drives the gear, hopefully that makes sense. Its kind of a feel thing when re-assembling since its difficult to see when your putting it back together.
Thanks for the tip about moving the gear and checking that the pump was working, I am surprized that worked, I would have thought you would have to get that gear moving a few thousand RPM's before the pump would displace any significant amount of oil.
I'm glad I could help!
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Hi Karla,
I am not sure if the gear is being engaged properly, I didn't know about the trick that you mentioned for aligning tabs in the gear, I may have overlooked it. I will open it up again to see. I've been away from it for a few weeks. Regarding seeing the oil come from the pump, I saw a little trickle as I was turning the piston. I could see air bubbles too. Then when I turned it in the opposite direction I didn't see anything happening, but then reversed to the other direction and I saw another trickle. I am assuming this means the pump is working.
I will let you know if it turns out the gear wasn't lining up properly with the tabs.
Thank you, and I'm sorry it took so long to get back on here to respond.
Alan
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