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Clutch slipping v120 forklift

Clutch slipping v120 forklift

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Gold Dozer
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Looking for assistance on this unit.its been sitting for years because the clutch was worn out.replaced the clutch disc.machine shop resurfaced the flywheel and pressure plate.they were only slightly scored from the worn out disc.the unit moves but slippage occurs when a load is applied like an up hill or carrying a load.there is an adjustment on the pressure plate but I'm not sure where it should be set at or if this is even the issue.has anyone come across this issue.any assistance is greatly appreciated. It's a good unit and have had fun getting it up and running after a long rest. [attachment=69052]20221004_085738.jpg[/attachment] [attachment=69053]20221004_085643.jpg[/attachment]
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Tue, Oct 4, 2022 8:17 PM
Rome K/G
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Any free travel in the pedal?
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Wed, Oct 5, 2022 4:11 AM
Gold Dozer
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Reply to Rome K/G:
Any free travel in the pedal?
There is.increased it today but I'm waiting for a tilt cylinder to be repaired so I couldn't test it.
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Wed, Oct 5, 2022 4:37 AM
Rome K/G
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Reply to Gold Dozer:
There is.increased it today but I'm waiting for a tilt cylinder to be repaired so I couldn't test it.
Ten 4
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Wed, Oct 5, 2022 4:46 AM
restore49
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Reply to Rome K/G:
Ten 4
When you resurfaced the flywheel - does the pressure plate bolt to that new surface or a raised outer lip of flywheel? There should be spec for the forks to disk surface adjustment.
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Wed, Oct 5, 2022 7:05 AM
Jack
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Reply to restore49:
When you resurfaced the flywheel - does the pressure plate bolt to that new surface or a raised outer lip of flywheel? There should be spec for the forks to disk surface adjustment.
Any chance the disk was installed backward? Does the hub protrude further on one side than the other? Did it get burned long enough in operation to take the spring out of the springs? Those adjustments usually are set up on a bench to get all of the levers up to a factory spec and all the same. Have they been tinkered with? Just a few things I have run onto over the years, maybe of no use to you at all, but they are things I check first...

Jack
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Wed, Oct 5, 2022 11:43 AM
Gold Dozer
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Reply to Jack:
Any chance the disk was installed backward? Does the hub protrude further on one side than the other? Did it get burned long enough in operation to take the spring out of the springs? Those adjustments usually are set up on a bench to get all of the levers up to a factory spec and all the same. Have they been tinkered with? Just a few things I have run onto over the years, maybe of no use to you at all, but they are things I check first...

Jack
The disc could have been backwards to begin with.dont have a manual to check the orientation of the disc so I installed it the same way.this has been tinkered with alot before I started on it so anything is possible. From what I can see the last clutch disc didn't last very long.the oil supply to the clutch was turned off.assumed that was the cause of the short life span but now I think it wasn't.taken a photo of the disc spline and the snout of the disc is facing towards the release bearing.
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Wed, Oct 5, 2022 6:44 PM
Gold Dozer
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Reply to restore49:
When you resurfaced the flywheel - does the pressure plate bolt to that new surface or a raised outer lip of flywheel? There should be spec for the forks to disk surface adjustment.
Honestly I can't remember if it's a raised edge or not.its hard to tell now that it is together. Do you of a link to specs or manual for this beast?
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Wed, Oct 5, 2022 6:56 PM
Gold Dozer
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Reply to Jack:
Any chance the disk was installed backward? Does the hub protrude further on one side than the other? Did it get burned long enough in operation to take the spring out of the springs? Those adjustments usually are set up on a bench to get all of the levers up to a factory spec and all the same. Have they been tinkered with? Just a few things I have run onto over the years, maybe of no use to you at all, but they are things I check first...

Jack
 [attachment=69071]20221005_072057.jpg[/attachment]here is a picture of the disc spline
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Wed, Oct 5, 2022 6:59 PM
Jack
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Reply to Gold Dozer:
 [attachment=69071]20221005_072057.jpg[/attachment]here is a picture of the disc spline
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Oops! I hadn't considered this to be an oil clutch. Could someone have put in a dry clutch disk, a "will fit" part? Does it want to hang up when shifting out of neutral, like one side of the disk is sticking to the flywheel until you get it jammed into gear? Check that part number, see if it is the correct disk, dry or oil application.
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Wed, Oct 5, 2022 8:57 PM
Gold Dozer
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Reply to Jack:
Oops! I hadn't considered this to be an oil clutch. Could someone have put in a dry clutch disk, a "will fit" part? Does it want to hang up when shifting out of neutral, like one side of the disk is sticking to the flywheel until you get it jammed into gear? Check that part number, see if it is the correct disk, dry or oil application.
Surprisingly it shifts and works ok until a load gets applied.the disc came from cat and is the only one listed.judging by the friction plate design/pattern it's for a wet application.the springs could be the issue.only did a short test drive with the new disc installed but the old clutch was worn out to paper thinness.
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Wed, Oct 5, 2022 9:19 PM
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