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  #1  
Old 08-30-2024, 05:33 PM
KK560 KK560 is offline
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Default 125 Hydro Issue
Why would my hydro work at low rpms, but when I have the engine speed up for mowing it doesn't want to move? Last week when I was mowing I was having a similar problem, if not the same, so I took the relief valves out to make sure they weren't half open, and they're fine and seem to be working properly. The filter doesn't even have 100hrs on it.
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  #2  
Old 08-30-2024, 07:27 PM
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Sam Mac Sam Mac is offline
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How is the fluid level? 100 hours, how many years since both the fluid and filter have been changed? What are you running for oil and filter make and number?
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  #3  
Old 08-30-2024, 08:15 PM
Grandpa53 Grandpa53 is offline
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Make sure roll pins are intact in driveshaft
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Old 08-30-2024, 08:36 PM
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Billy-O Billy-O is offline
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Both Sam and Grandpa have the right ideas to start. Are you leaking any fluid at all?
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Old 08-31-2024, 02:26 AM
KK560 KK560 is offline
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How is the fluid level? 100 hours, how many years since both the fluid and filter have been changed? What are you running for oil and filter make and number?
The fluid level is good. The filter was changed either late last season or early this season. The fluid was changed a year or two ago with Hytran
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'65 100 w/ creeper, '68 125, '75 1000, '76 1250 w/ hydraulic lift and 3pt, '77 "2550", '78 1200 w/ rear pto and spring assist lift, '79 1250, several mowing decks, 42" snow blower, 42" dozer blade, Brinly plow, 5' Massey disk, and New Idea dump cart
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Old 08-31-2024, 02:29 AM
KK560 KK560 is offline
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Make sure roll pins are intact in driveshaft
That was the first thing I checked and they seemed to be fine
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'65 100 w/ creeper, '68 125, '75 1000, '76 1250 w/ hydraulic lift and 3pt, '77 "2550", '78 1200 w/ rear pto and spring assist lift, '79 1250, several mowing decks, 42" snow blower, 42" dozer blade, Brinly plow, 5' Massey disk, and New Idea dump cart
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  #7  
Old 08-31-2024, 02:32 AM
KK560 KK560 is offline
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Both Sam and Grandpa have the right ideas to start. Are you leaking any fluid at all?
Nope, not leaking anything
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'65 100 w/ creeper, '68 125, '75 1000, '76 1250 w/ hydraulic lift and 3pt, '77 "2550", '78 1200 w/ rear pto and spring assist lift, '79 1250, several mowing decks, 42" snow blower, 42" dozer blade, Brinly plow, 5' Massey disk, and New Idea dump cart
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  #8  
Old 08-31-2024, 06:44 AM
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Filter make & part #
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  #9  
Old 08-31-2024, 08:46 AM
DSarow DSarow is offline
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I would change the filter and then cut and inspect the old one for any signs of parts or materials that don't belong.It sounds like you have done the most common parts to fail. Good luck,I also have and enjoy my 125
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  #10  
Old 08-31-2024, 09:01 AM
finsruskw finsruskw is offline
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The spirol pins (what should be installed there, and not split roll pins) may look good and still be visible on either or even both sides of the coupler but still be broken internally, with one or both ends you may be able to see still stuck in the coupler.

I suggest you hold the coupler tight w/pliers and and try to spin the driveshaft while doing so with another pair of pliers or vise grips.

I have seen this issue before an 882 diesel which are hard on pins.
Both ends still in the coupler but the hydro input shaft not turning.
And when driving the old pin out, what's left of it comes out in pieces.
It may be tough lining up the coupler with the hole in the driveshaft when installing a new spirol pin, use a short length of 1/4" bolt shank to line the holes up and drive the new pin in while pushing the piece of bolt out the other side.

Good luck!

NOTE TO SELF: replace the pins in the 882 BEFORE heading to Bluneirs plow day in October!!
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