If you look on your bar you should see some numbers engraved in the side. One of those numbers will tell you how many drive links you need for your chain. For example on a 20" bar you'll see the numbers 72DL, or 72 drive links. Next you can take your chain and count the drive links to make sure it is the correct amount. The drive links are on the bottom of the chain.
The other thing you need to remember is that the chains are typically longer than the bar. This allows for the chain to be put on the sprocket and bar easier and then you can tighten them down to the right tension.
Hopefully this helps answer your question.
In order to give the correct part number could you give me the serial number? There should be a metal plate on your saw with this information. This plate is genereally located near the front of the saw by the bar & chain. If you could include all the other information on this tab I can get you the part number you need.
I know this is several months after you asked your question but if you didn't already get your answer here it is. Both the 128LD and 128LDx can take the different attachments but there are two different styles of attachments. The first style is a Husqvarna branded piece and those fit the 128LDx and other LDx models. The other style of attachment has the name of Poulan on it, which is also owned by Husqvarna. These Poulan attachements will fit your trimmer.
This has been very confusing for a lot of people. But I have heard that Husqvarna has plans to place their name on all the attachments in the future. Hopefully this answers your question and anyone else that has the same question.
I know you asked this question several months ago and hopefully you already have an answer but if not the answer to your question is yes, that is the correct bagger model for your tractor.
If you go to the web site below you can send a request for the part number you need. I hope this helps.
The 460 Rancher with the autotune carburetor won't be available to buy until some time next year. The autotune models will not come with the carburetor adjusment screws. The auto tune carb will adjust itself.
As far as your model is concerned it does sound like it needs an adjustment of the carburetor. But to do that you will need to take it in to a servicing dealer. There is a specific tool used to make the adjustment.
There should be another sticker on the machine, usually on the upper end of the blower tube, that has the serial number on it. This same sticker will have the model number as well as the product number.
This is typically covered under the warranty but you do have to take it in to a certified repair center to have it fixed. Usually they do require proof of purchase but the dealer should be able to help you.
The oil tank is for the bar & chain oil.
Here is the part # for the bagger: 960 73 00-04
Unfortunately with todays fuel it is a very common problem among all small engines, not just Husqvarna. The ethanol in the gas eats away at the rubber hoses. The only way to totally prevent this is to use an ethanol free gas. Here's a link to a video Husqvarna made with the effects of ethanol on todays small engines.
It is still available to order as a dealer, which means it hasn't been discontinued yet.
There is a small screw on the top of the carburetor that will adjust the throttle.
Your servicing dealer should also be able to help you make any other necessary adjustments.
The part number for the bagger you need is 966 61 05-01.
From the primer back of the primer bulb there are two plastic tubes. One of those connects to the metal tube coming out of the top of the carburetor. The other one goes into the fuel tank, but doesn't connect to anything. There is another plastic tube that comes out of the fuel tank and connects to the bottom of the carburetor. The other end of this tube is the one that connects to the fuel filter. If they aren't hooked up correctly the blower will not run.
Today's fuel is not what it used to be and it eats away at anything rubber. So it doesn't surprise me that your fuel lines may have had cracks.
With the way that the carburetor is built there is not a way for the fuel to flow in reverse.
Hopefully this helps fix your problem.