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doctorcorey 
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Joined: 17 Jul 2011
Location: S. KC Missouri
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 Topic: powershift loader operators
Posted: 07 Mar 2012 at 9:51am |
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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
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Mactractor
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Joined: 20 Jun 2011
Location: New Zealand
Points: 652
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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
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doctorcorey
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Posted: 07 Mar 2012 at 3:06pm |
 Mactractor wrote:
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
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well it has that little extra pedal that is attached to nothing. I'll try to see if I can make it all work. Thanks for the advice.
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Coke-in-MN
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Joined: 12 Sep 2009
Location: Afton MN
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Posted: 07 Mar 2012 at 5:05pm |
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.
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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."
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doctorcorey
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Joined: 17 Jul 2011
Location: S. KC Missouri
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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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Mactractor
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Posted: 07 Mar 2012 at 6:08pm |
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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
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HD6 Merv
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Joined: 03 Aug 2010
Location: New Zealand
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Posted: 07 Mar 2012 at 10:35pm |
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'.
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tits tyres and tracks
they all cost you money
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doctorcorey
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Location: S. KC Missouri
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Posted: 08 Mar 2012 at 8:59am |
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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.
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