PTO driveshaft rattle

[npalen 2]

ALLIS 720/PowerMax I'm getting an "on-and-off-again" rattle that I'm guessing is coming from the PTO driveshaft between the engine and the PTO clutch. Haven't had time to investigate yet but wondering if anyone's experienced this and a possible solution. Seems like something might be out of balance. Thanks Nelson

[JP 0]

A couple things can cause this.... Yoke bushings, Fiber disk, bearings or the chain link not being taped. JP

[RBE17 0]

Nelson, I wish I had this problem, but my rear pto shaft / clutch assy are MIA. Steve.

[eagle5473 0]

I had a vibration as well, and just disconnected the rear PTO drive shaft, as I dont currently have a use for it your situation may be different

[npalen 2]

Thanks guys, I'll pull the cover this evening, take a look and report back. All feedback is appeciated.

[npalen 2]

The rattle stops when the clutch is depressed so I'm now thinking it's a bad bearing or sheave driving the hydro. I don't normally use the clutch (belt tightener) and didn't realize the noise stopped when doing so. What else might be bad in the drive ahead of the hydro? Comments?

[JP 0]

Pivot point bushings, Fiber disk...

[npalen 2]

Sounds like I'm going to get my hands dirty.

[npalen 2]

Would anyone have the part nos. for the pivot bushings for the tightener and the fiber disc as well as a source? I assume the ball bearings can be purchased locally. Haven't opened it up yet but would like to have the parts on hand when I do. Thanks Nelson

[npalen 2]

Or is someone can give me the mfg. number for a Powermax, I can look up the manual here. Thanks Nelson

[RedbarnRick 3]

Here's a 4040 manual http://www.simplicitytechpubs.com/6767PRINT/PDF_files/TP_400_0391_02_GT_S.pdf

[UCD 14]

Rick on your file name delete the name off from the end and if the second number past tp is a 3 digit number 390 insert a 0 zero making it a 4 digit number 0390 IE the edited link in your above post

[npalen 2]

Thanks guys, greatly appreciated.

[npalen 2]

Would anyone happen to have a cross reference between PowerMax and Allis on identical parts?

[UCD 14]

They are the same tractors. There is a few differences between the model numbers 990705 Simplicity 4040 = 2020185 Allis Chalmers 616 16hp. Onan 990953 Simplicity 4041 = 2020303 Allis Chalmers 620 20hp. Onan 990954 Simplicity 4041 = 2020304 Allis Chalmers 620 20hp. Onan 1690072 Simplicity 9020 = 1690073 Allis Chalmers 720 20hp. Onan 1690230 Simplicity 9020 = 1690231 Allis Chalmers 720 20hp. Onan 1690283 Simplicity 9020 = 1690288 Allis Chalmers 720 20hp. Onan The best way to find the differences in parts would be to download the parts manuals and check for differences in part numbers.

[npalen 2]

Any idea where I might find the Allis 720 manual?

[gregc 3]

PARTS MANUAL - Model 720 http://www.simplicitytechpubs.com/6767PRINT/PDF_files/TP_400_3795_00_XX_A.pdf

[npalen 2]

Thanks!

[UCD 14]

You can download manuals on the main page by typing the MFG# into the Search for Manuals at Simplicity Mfg. Box in the upper right corner or at this site. http://www.simplicitytechpubs.com/techpubsearch.php#start

[npalen 2]

I feel compelled to say that the help on this Forum is awesome!!!!