l2550 RPM indicator issues

dracormbd

New member

Equipment
L2550,loader,backhoe
Apr 9, 2019
14
0
0
feasterville pa
replaced the RPM hose attached to engine block and found it spins and hour meter is fully functional yet the needle for rpm doesn't move at all...I'm not sure if there are magnets that serve to engage needle or how/what this part is actually called, if it is replaceable or serviceable...the top silver cup portion does spin and increases as rpms are, however the silver portion connected to needle does not move at all.....thoughts and direction are truly appreciated
 

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Roadworthy

Well-known member
Lifetime Member

Equipment
L2501 HST
Aug 17, 2019
1,649
526
113
Benton City, WA
Some cables allow you to pull out the center section. If that's the case with yours you could clean and lubricate it for smoother operation.
 

Roadworthy

Well-known member
Lifetime Member

Equipment
L2501 HST
Aug 17, 2019
1,649
526
113
Benton City, WA
If the cable spins going to the tachometer and it's spinning in the correct direction with no indication your tachometer unit itself may be bad. I do not know how Kubota implements the tachometer function. The cable could be spinning a small internal generator and the needle could be indicating the voltage it generates - the faster it spins the greater the voltage and the greater the deflection of the needle. Take that as a possibility, not the way it actually works. The tachometer can be replaced as an individual item - you need not replace the entire instrument cluster. I believe it's part # 31351-93760.
 

dracormbd

New member

Equipment
L2550,loader,backhoe
Apr 9, 2019
14
0
0
feasterville pa
got a response from dandmrestoration***8230;.they do not work on tractor tachs due to different calibration equipment ***8230;..thanks though.
 

Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
5,134
936
113
Williamstown Ontario Canada
got a response from dandmrestoration***8230;.they do not work on tractor tachs due to different calibration equipment ***8230;..thanks though.
Try this guy. The Red tractor people (IH)have used them for older machines.

http://antiqueinstrument.com/

Also:

Stenes Speedometer, Altoona WI 715-834-4061 Ask for Dennis

Bob's Speedometer, 800 592-9673

Star speedometer in Florida 386-569-5284,

Metro Speedometer in Independence Mo. 816-478-0116

Dave