ca pto
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=9482
Printed Date: 21 Jan 2025 at 1:25am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: ca pto
Posted By: 48lakes
Subject: ca pto
Date Posted: 14 Mar 2010 at 4:29pm
|
I have a ca model, and the hand clutch is not working properly, when I depress the pedal the pto stops , I am ok with that, would I have pto in nuetral gear with the clutch pedal not depressed for stationary use . I can't get my head wrapped around how the hand clutch works mechanicaly . I understand it's advantages, but I don't no what makes it tick . Can anybody explain. Thanks
|
Replies:
Posted By: Rick of HopeIN
Date Posted: 14 Mar 2010 at 4:40pm
|
Strange system they cooked up. The hand clutch only disconnects the right axle shaft. The differential spins free since it cannot send any torque to the left side and the power goes thru to the PTO.
|
Posted By: GregLawlerMinn
Date Posted: 14 Mar 2010 at 5:32pm
|
48Lakes
The hand clutch is a mechanical dry clutch that splits the right rear axle when the lever is pulled back (the axle is a two piece axle and it engages the clutch on each side). When you pull back the handle for the hand clutch, it opens and "splits" the axle, the differential spins and ground movement stops. However, the pto shaft continues to spin, thus proving "live power" to the pto and hydraulic pump (which runs off the pto shaft inside the pumkin). The hand clutch is not meant to be used to shift gears; thats what the foot clutch does.
Would be willing to help diagnose what the "does not work properly" is caused by if you can provide a better description. The hand clutch, like any other friction clutch, can wear, slip or freeze tight.
|
Posted By: Rick of HopeIN
Date Posted: 14 Mar 2010 at 6:01pm
|
According to the books it was a way to get the WD type hand clutch function with a CA drivetrain that was based on the simple B and C system with PTO driven by the same shaft as the differential. The WD had PTO driven as a separate shaft under the tractor, ahead of the hand clutch but that would have been a big tearup on the CA. Later they resolved that on the D series with a more conventional live PTO drive.
|
Posted By: CTuckerNWIL
Date Posted: 14 Mar 2010 at 9:06pm
"I have a ca model, and the hand clutch is not working properly, when I
depress the pedal the pto stops , I am ok with that, would I have pto in
nuetral gear with the clutch pedal not depressed for stationary use "
When you depress the foot clutch the PTO is supposed to stop. Yes you would have the PTO working if you put the tractor in neutral and let out the clutch. The hand clutch just disconnects the right rear wheel from the drive train, like jacking one rear wheel off the ground.
-------------
http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
|
Posted By: Rick of HopeIN
Date Posted: 14 Mar 2010 at 9:14pm
I have PTO and hydraulics on the B when in neutral, clutch engaged I am pretty sure.
I think that means you still need an overrunning clutch with a implement like a rotary mower to keep it from doing a Toyota.
|
Posted By: GregLawlerMinn
Date Posted: 15 Mar 2010 at 9:45am
|
An overiding clutch prevents the momentum of the blades from "driving" the tractor when the foot clutch is engaged (the momentum turns the pto which, in turn, turns the differential and axles). An overiding clutch is not needed on the CA (or WD, WD 45, or D-series) as the hand clutch does the same thing, it splits the axle and all power is slipped in the differntial). The advantage of the pto "live power" provided by the hand clutch is that one can stop the tractor motion in tough going to allow the blades to catch up (I call it "inching thru the tuff stuff". One does, however, have to get used to reaching for the hand clutch 1st when stopping the tractor (to shift gears, or ??) when using rotary pto driven equipment.
|
Posted By: Max(ia)
Date Posted: 15 Mar 2010 at 10:31am
|
All above are good explanations, but I find that I don't have enough hands to use the hand clutch, Hyd. lever, throttle and steering whl at the same time when using the blade. lol
|
Posted By: 48lakes
Date Posted: 15 Mar 2010 at 11:51am
|
Thanks for all the help guy's, I understand how it works know, I will know start the R&R process, Iam sure it's only the begining ,I think you will hear from me again. Thanks again 48lakes
|
Posted By: Rick of HopeIN
Date Posted: 15 Mar 2010 at 7:38pm
Never thought about the CA hand clutch working to prevent overrun due when running the PTO. Makes sense that it works both ways now that you mention it.
You cannot change gears with the hand clutch disengaged if it works as I understand, I guess that would take some getting used to.
|
Posted By: DREAM
Date Posted: 15 Mar 2010 at 8:02pm
|
Rick, I was thinking that was why they put the hand clutch on there. I know it's good for balers, pickers, and things like that, but the main reason I would want one is to STOP THAT mailto:!@#$% - !@#$% BUSH-HOG FROM PUSHING ME THROUGH THE BARBED WIRE FENCE! LOL! I had an experience with my grandads' C when I was probably too young to be using the bush-hog anyway. I know I didn't weigh enough to get it to stop, even with my foot on both brakes and standing up pulling hard against the steering wheel. Luckily, it did wind down before the flails got to the barbed wire. Spent 15 minutes getting my ear chewed off by Paw-Paw, and another hour fixing the fence.
|
|