Need help attaching mower grass & leaf bagger.

grass catchers need special shaped or good blades to throw the cut grass into the bag
check/ replace the blades

Yes. I use gator mulching blades during the summer. They won't bag a thing. The original/standard blades will bag some grass/leaves, if they are dry and not too dense, but they are prone to clogging. The high lifts work much much better.

I get mine on amazon. The shipping is free. LA145 48" deck. Part GX21785.
http://www.amazon.com/gp/product/B00CAXMAG2/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1#product-description-iframe

ive got a JD 180 .with a bagger on it if you have the factory bagger
1st bolt bracket to back right hand side of tractor holes should allready be there next assemble bagger top to tractor bracket , hang collection bags (two) from top of bracket (open top to access) then assemble diverter tube all together three sections , snap end (wide) into bagger (no bolts needed) then fold back safety discharge cover on deck all the way snap the inlet adaptor into hole left by this (perfect fit) and last stretch rubber bungee up to deck wheel strut and place clip thru small moon clip there, now you willl need to replace your deck blades with the High Lift type (mulch) avail still from JD (theres a extra wing on back of it) this makes more air to scoot grass up the chute if not your gonna have a lot of cloggs

you mean a bagger ???

Try this link to Deere customer support:
http://manuals.deere.com/cceomview/OMM167392_B2/Output/Index.html?tM=HO
If that's not your model, look around - they do seem to have quite a few manuals online, and offer to sell you a paper copy if they don't have an online version. Good luck!

Make and model are important and would help. Generally they are pretty simple. Some older models you had to bolt a mounting bracket to the rear corner of the frame and then a support slipped into the bracket. Some newer models have a drop in feature (these have rounded ridges on the back of the frame and have horizontal slots cut in them). On these the support bar simply drops into the horizontal slots then a swinging bar slips into 2 holes on the fenders to support the rearward hanging weight. The most important part is getting the right bagger model for your model. If it is a very old model that discharges grass out the back of the deck you may have a hard time finding a bagger at all. If you have a side discharge just make sure you are getting the right version for your tractor. If your tractor has a smooth flat back you need the version that has a bolt on mounting bracket. If it has the rounded vertical humps you need the newer version.

Change to a bagger blade that has more lift (two blades)

Curved edges go up.

John Deere LA 125. Chute keeps clogging up with grass.

the grass is too high, cut it 2 times first cut should be half then the second cut should be the normal level. just remember go the other way on the second cut.