Eaton Vickers CM2 Series

Questions and Answers

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Brian TaylorAug 9, 2025
Why is there no motion, slow or jerky action in my Eaton Control Unit hydraulic system?
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  William FullerAug 9, 2025
  If your Eaton Control Unit's hydraulic system exhibits no motion, slow, or jerky action, it could be due to several reasons. The relief valve might not be properly set, stuck, or worn, requiring repair, cleaning, and readjustment. Alternatively, dirt or foreign particles might be lodged between the relief valve control poppet and seat, necessitating disassembly, cleaning, and reassembly. In more severe cases, the valve body could be cracked, requiring replacement of the valve section. Finally, ensure the spool is moved to its full stroke by checking its travel.
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Preston MillerAug 14, 2025
What to do if the load will not hold with Eaton Control Unit?
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  jhallAug 14, 2025
  If the load won't hold with your Eaton Control Unit, it could be due to oil bypassing between the spool and body, which means you should replace the valve. It may also be caused by oil bypassing the piston in the cylinder, in that case repair or replace the cylinder. Another potential issue is a spool that is not centered; in this case refer to above spool remedies.
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Danielle ParrishAug 19, 2025
How to fix oil leads at either end of spool in Eaton Control Unit?
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  Kimberly GrossAug 19, 2025
  If you notice oil leaks at either end of the spool in your Eaton Control Unit, several factors could be responsible. It might be caused by defective O-rings in the valve body, in which case you should replace the O-rings. Broken springs could also be the cause, requiring their replacement. A bent spool could also lead to leaks, which means you should replace it with a new section of the same size and type. Foreign particles in the system or valve could also cause leaks, so clean the system and valve. Misalignment of the operating linkage, causing a binding condition, or improperly torqued valve tank nuts could also be culprits; check the linkage and re-torque the nuts to specified ratings, respectively.
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Tonya WalkerAug 25, 2025
What to do if there is no relief valve action (High Pressure) in Eaton Vickers CM2 Control Unit?
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  Roy GarciaAug 25, 2025
  If there is no relief valve action (high pressure) in your Eaton Control Unit, a small particle of dirt may be plugging the orifice in the relief valve sub-assembly. Remove the relief valve and check the hole. If blocked, clear the hole. Another potential cause is that the relief valve sub-assembly may be installed backwards, so ensure it is installed properly.
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Susan ColeAug 29, 2025
Why does the load drop when spool is moved from neutral to a power position in Eaton Control Unit?
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  Mr. Justin DanielsAug 29, 2025
  If the load drops when the spool is moved from neutral to a power position on your Eaton Control Unit, it may be caused by dirt or foreign particles lodged between the check valve poppet and seat. In this case, disassemble, clean, and reassemble. Another possible cause is a scored or sticking check valve poppet, which would require you to replace the poppet.
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Daniel RamosSep 3, 2025
What to do if detent type spools will not stay in detent position in Eaton Vickers CM2?
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  Angela WelchSep 3, 2025
  If detent type spools will not stay in detent position on your Eaton Control Unit, it could be due to a worn detent barrel, which means you should replace it. Alternatively, it might be caused by a weak or broken detent spring, in which case you should replace the detent spring.