Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Homelite => Topic started by: DeplorableAmerican on April 20, 2018, 11:00:23 pm

Title: Homelite Ryobi model conversion
Post by: DeplorableAmerican on April 20, 2018, 11:00:23 pm
I got a Ryobi (C4620) RY10520 , S/N ATN3020498. That is having auto oiler issues. I have cleaned the discharge port, lightly pressurized the oil tank, checked the discharge port and put a mighty vaced the discharge port. I am assuming that the pump is bad. Getting to the pump seems to be impossible. I removed all the external screws with the exception of the 4 engine mounts screws. It looks by the diagrams that the oil pump mounts underneath and is situated length ways front to rear. Between the block and flywheel. I thought i could remove half of the outer shell and gain access.
I wounder if i can find more information by looking up the homelite version? Not sure what homelite model number would be the mirror of the Ryobi?
Its a Ryobi (C4620) model number RY10520, serial number ATN3020498.
any help would be greatly appreciated.
Title: Re: Homelite Ryobi model conversion
Post by: Cut4fun . on April 21, 2018, 06:50:01 am
This? https://chainsawrepair.createaforum.com/chainsaws-not-listed/ryobi-ry10520-46cc-20'/msg14556/#msg14556

ryobi 4620 IPL  https://www.ereplacementparts.com/ryobi-ry10520-46cc-chainsaw-parts-c-7931_8088_162365.html

oil pump  https://www.ereplacementparts.com/oil-pump-assy-p-218898.html?osCsid=25liv4o33ah1u2tc60aljpkj01

Check and see if your worm gear is stripped.  https://www.ereplacementparts.com/left-hand-worm-p-218938.html?osCsid=25liv4o33ah1u2tc60aljpkj01
Title: Re: Homelite Ryobi model conversion
Post by: DeplorableAmerican on April 21, 2018, 11:21:07 am
Hi cut4fun,
I have the same pages saved to my phone with the exception of the homelite one. Thank you for your assistance. I plan to work on it Sunday. The ryobi seems to cut smoother then the polan wild thing i own. It looks like from the diagram i will have to remove the engine from the shell to get to the oil pump. To bad it dosent have the pump behind the chain gear. That would make it so much less of a project.
The next time i buy a saw i am going to check the diagrams to check the ease of service issues like this issue.
Thanks again for your help.
Title: Re: Homelite Ryobi model conversion
Post by: deezlfan on April 21, 2018, 07:51:17 pm
Try changinging the Ryobi model number to a Homelite model number by substatuting RY with UT.

So RY10520 becomes UT10520.

https://www.partstree.com/parts/homelite/saws-chainsaw/ut-10520-green-machine-chainsaw-42cc-46cc/general-assembly/

https://www.partswarehouse.com/Ryobi-RY10518-RY10520-46cc-Chain-Saw-s/171929.htm

Doesn't work with every Ryobi saw because there were way more models of Homelite that have no Ryobi equivalent. Unfortunately, it will probably take you to almost identical parts lists. Decals and plastics will vary.
Title: Re: Homelite Ryobi model conversion
Post by: DeplorableAmerican on April 22, 2018, 05:31:45 pm
Thank you deezlfan. I will see what i can find with the cha of the first two letters.
Title: Re: Homelite Ryobi model conversion
Post by: DeplorableAmerican on April 24, 2018, 07:29:15 pm
Thought i wood keep everyone my progress. I was able to get the oil pump out. the long gear in the oil pump was stripped. I order a replacement $9.97 $15.00 with shipping. Cant wait to get it running again i have a downed tree in my yard and the grass could use a good cutting. Thanks for the help.
Title: Re: Homelite Ryobi model conversion
Post by: DeplorableAmerican on April 28, 2018, 02:40:36 am
Got my new bar oil pump today. Plan on installing tomorrow to cut on sunday 70. I thought i read on here somewhere to wash out the tank. Dose anyone have the link that tells was if any soap to use? I thought about running light weight oil thru the tank and pump first?
Title: Re: Homelite Ryobi model conversion
Post by: Cut4fun . on April 28, 2018, 06:20:43 am
I dont clean tanks unless someone ran crap used oil in them. Then I rinse with mix or kerosene.
Title: Re: Homelite Ryobi model conversion
Post by: deezlfan on April 28, 2018, 06:52:42 am
A good rinse couldn't hurt. Splash of gas, a good shake and pour it out.

I pour the remains in with the gas going though the riding mower. The old Briggs can use as much lubrication as it can get.
Title: Re: Homelite Ryobi model conversion
Post by: DeplorableAmerican on April 28, 2018, 12:46:40 pm
Thank You Cut4fun and deezlfan for your responses. I failed to mention that when i drained the tank before that a very few pieces of what looked to be of the same black plastic as the pump were floating around in the old bar oil.
I drained and flushed the tank out this morning with mix fuel befour checking my email. After filtering the mix fuel flush i found 3 more pieces. I have no idea how they would get in the tank but there they were.
Thanks again for your help and advice gentlemen.
Title: Re: Homelite Ryobi model conversion
Post by: DeplorableAmerican on April 29, 2018, 12:17:04 am
I installed the new pump. However the drive gear (crank shaft) and the pump gear dont make contact.
I put 2 and 1 oil in the pump input (large hole) 4 drops filled it. Then i moved the gear with my finger. After a few rotations the 2 and 1 oil moved out of the pump input thru the output.
Then i attached it to the lower section on the engine block. I watched to make sure i wasn't screwing up any plastic gear teeth and moving the crankback back and forth while tightening.
I could No longer see the metal crank or plastic pump gear mesh.
Next i tried to get the pump to pump by turning the flywheel.
 ???wth???
I read a post that spoke of the metal crank gear being warn. I will check that tomorrow. Plan on micing the crank gear and checking with the diameter of a replacement. In the mean time i may use a little white paint to check a contact pattern.