This is what JD says about their 5000 series clutches:
Clutch Slip on 5000 Series Tractors
Learn the importance of checking and maintaining proper clutch alignment
Symptoms
The tractor's clutch seems to have premature wear. An operator may also notice the clutch slipping during operation.
Situation or Problem
Normal use will cause the clutch to wear slowly. This, in turn, causes partial disengagement of the clutch. When the clutch becomes partially disengaged, it begins slipping and wears at a much faster rate than normal. Slipping will be especially noticeable under medium or heavy load. As the clutch wears from normal use, it is important to readjust as necessary to prevent partial disengagement.
The amount of wear can be determined by measuring the free play in the clutch pedal, which will decrease as the clutch wears. The free play is defined as the distance the clutch pedal can be pressed before resistance on the pedal is noticed.
Solution Steps
Information on checking the clutch free play can be found in your John Deere operator's manual or maintenance guide, depending on the specific model of the tractor. If your clutch pedal's free play is not within specification, adjust the clutch per the instructions in your manual or contact your John Deere dealer. This is normal maintenance and will prevent the clutch from slipping or wearing out prematurely.
It is important to check the free play of your clutch pedal on a regular basis. Under normal use conditions, clutch free play should be checked after every 100 hours of operation. Applications such as towing, pushing, or loading may create additional wear on the clutch and warrant more frequent checks.
Checking clutch free play is just one of the many maintenance procedures that should be performed on a regular basis. Be sure to check your John Deere owner's manual for a full list of regular service intervals.
If you no longer have access to your tractor's manuals, click here for information on receiving duplicate copies in electronic or paper form, or visit your John Deere dealer.
Affected Equipment
5103 Tractor 5105 Tractor
5200 Tractor 5203 Tractor
5205 Tractor 5210 Tractor
5220 Tractor 5225 Tractor
5300 Tractor 5303 Tractor
5310 Tractor 5310N Narrow Tractor
5320 Tractor 5320N Narrow Tractor
5325 Tractor 5325N Narrow Tractor
5400 Tractor 5403 Tractor
5410 Tractor 5420 Tractor
5420N Narrow Tractor 5425 Tractor
5425N Narrow Tractor 5500 Tractor
5500N Narrow Tractor 5510 Tractor
5510N Narrow Tractor 5520 Tractor
5520N Narrow Tractor 5525 Tractor
5525H High Crop Tractor 5525N Narrow Tractor
5603 Tractor 5625 Tracto