powershift loader operators
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=46826
Printed Date: 24 Jun 2025 at 1:03am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: powershift loader operators
Posted By: doctorcorey
Subject: powershift loader operators
Date Posted: 07 Mar 2012 at 9:51am
| I've read the manuals, but with little real-world experience, I have a question. When operating in a back and forth manner, like backfilling or grading, the throttle is left in high idle, and the tractor can be shifted into or out of forward and reverse, as long as the machine is not moving. So if I come to a stop from reverse, I can then shift to forward low and this doesn't hurt the transmission? I have a early model HD7G with high-low forward and reverse. I do know I can shift from low range to high or vice-versa moving under full power. I'm just concerned about transmission life. Thanks, Corey Chartier |
Replies:
Posted By: Mactractor
Date Posted: 07 Mar 2012 at 1:38pm
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Always throttle off with the decelerator when shifting any gears (direction or speed) Corey. The trans clutch assemblies have a very thin steel disc for each gear which holds pressure to initiate gear engagement. If you engage gears with the throttle up, the impact on those discs buckles them. The trans then has to come out and be rebuilt! Always throttle off to low idle and stop the machine before shifting from forward to reverse and vise-versa. The trans is not the only component that will last much longer if you operate in that manner. If your machine does not have a decelerator, FIT ONE AS SOON AS YOU CAN. Mac |
Posted By: doctorcorey
Date Posted: 07 Mar 2012 at 3:06pm
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Mactractor wrote:Posted By: Coke-in-MN
Date Posted: 07 Mar 2012 at 5:05pm
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That should operate a slip linkage within the throttle control to allow the pump to go to idle position but when foot is removed to come back to set position. best to always use it or back off on the power when changing direction and to use it instead of brake to control movement . Remember fast reverse leads to higher track wear almost 5 to 1 , then any highs speed use shortens track life . Keep it slow and keep it without shock to system and everything will last longer. ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: doctorcorey
Date Posted: 07 Mar 2012 at 5:39pm
Well, I have always reduced to idle to change directions, after stopping, but the operators I see keep the engine humming most of the time and also to keep the volume up on the shovel hydraulics. I looked, and I do have this extra piece of linkage: probably was for that decellerator thing. I'll put that back in working order and use it. 
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Posted By: Mactractor
Date Posted: 07 Mar 2012 at 6:08pm
| Way to go Corey. During the brief moments of gear shifting, there is no need to have full hydraulic output. To minimise impact (and damage) on those valve discs I mentioned, on changing direction, stopping the tractor is just as important as throttling off. Those guys you see shifting gears with throttle up are the ones you never hire to operate a machine. If you have, you fire them when you witness their destructive ways. Mac |
Posted By: HD6 Merv
Date Posted: 07 Mar 2012 at 10:35pm
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Remember when operating machines. If its hard on the man it must be bloody hard on the machine. Slow down and take it abit easier ! ! Usually when people are running machines hard out abussing them; they are never the ones who have to fix it or pay for it. If you have to do either or both, you will soon learn how to operate 'inteligently'. ------------- tits tyres and tracks they all cost you money |
Posted By: doctorcorey
Date Posted: 08 Mar 2012 at 8:59am
| I agree with you guys about taking it easy on the old machines, especially since it takes 6 months of searching to find one seal or clip for the trans! I've always been able to get twice the use or mileage out of my equipment as most of my buddies. I brought this subject up because I've watched some guys around here just fly around a work site and never seeming to lose a second stopping. I think I'm going to have my tractor hauled up to my shop in KC and just finally give it a full go-0ver. Working on a tractor out in the mud and dust is as bad as a doctor doing surgery in a trash dumpster. Too many contaminants to worry about. |