624 Power Shift Tranny Gears - Snowblower Forum : Snow Blower Forums
 
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post #1 of 6 Old 02-04-2019, 02:47 PM Thread Starter
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624 Power Shift Tranny Gears

Model 38500 (with the Mitsubishi engine) Unit is in perfect shape with no rust, cables are like new. Problem is that he installed non-OEM Green Gates belts and the tranny pulley always spun. Every time he went from forward to reverse and reverse to forward he chipped away the bevel gears to where now all 3 of them have missing teeth. Ordered the input gear and the set of forward/reverse gears that include the slider, should be in this week. First time I've worked on one so clean, and the first Mitsubishi engine which runs sweet. That Bentonite grease stinks like a wet dog! Gonna use a low temp EP grease when I put her back together. I also ordered shims to bring the end play back in line on both shafts.
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post #2 of 6 Old 02-04-2019, 02:49 PM Thread Starter
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Also ordered two new OEM Belts!!
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post #3 of 6 Old 02-06-2019, 09:27 AM
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MAZEL TOV on That 1.

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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MAHALO!!!!!!!!!
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post #4 of 6 Old 02-11-2019, 06:25 AM Thread Starter
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The Power Shift is back up and running sweet! It was so nice to finally work on one where the cables weren't frozen and the plastic shifter was intact. Adjusting everything was easy and the tranny works great. Only difference I saw was that the new slider and forward/reverse bevel gears are vertically cut and do not have a "ramp" to aid in engagement. Other than that it is a nice unit that has changed my mind about these Power Shift Models. I'd love to find a nice one.
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post #5 of 6 Old 02-11-2019, 06:42 AM
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Interesting, I have one that does the same thing when I an in reverse and let go of the reverse lever, it grinds. I find this weird as it should only be letting it go back into Neutral but still grinds. Also, any idea why I have to hold the shifter in reverse the whole time or it moves back to Neutral on its own?

Current machines-
1978 Bolens 8/24 (Loncin 420cc engine upgrade)
1986 toro powershift 6/24 ( 212cc Predator upgrade)
1988 Simplicity 860 (Predator 301cc upgrade)
1995 Honda HS 621
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post #6 of 6 Old 02-11-2019, 09:13 AM Thread Starter
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The reverse shifter fork is spring-loaded. It will generally stay in place once the traction handle is depressed but I keep it held back with my right hand while I depress the traction lever with my left just so it doesn't slip and grind.
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