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Brookeld Engineering Laboratories, Inc. Page 31 Manual No. M00-151-I0614
APPENDIX F - Fault Diagnosis and Troubleshooting
Listed are some of the more common problems that you may encounter while using your Viscometer.
Review these items before you contact Brookeld.
Spindle Does Not Rotate
❏ Make sure the universal power supply is plugged in.
❏Make sure the universal power supply connector is attached to the Viscometer.
❏ Make sure the power switch is in the ON position.
❏ Make sure the speed set knob is set properly and securely at the desired speed.
Spindle Wobbles When Rotating or Looks Bent
❏ Make sure the spindle is tightened securely to the viscometer coupling.
❏ Check the straightness of all other spindles; replace them if bent.
❏ Inspect viscometer coupling and spindle coupling mating areas and threads for dirt: clean threads
on spindle coupling with a 3/56-inch left-hand tap.
❏ Inspect threads for wear; if the threads are worn, the unit needs service (see Appendix H).
❏ Check to see if spindles rotate eccentrically or wobble. There is an allowable runout for
1/32-inch in each direction (1/16-inch total) when measured from the bottom of the spindle
rotating in air.
❏ Check to see if the viscometer coupling is bent; if so, the unit is in need of service.
If you are continuing to experience problems with your viscometer, follow this troubleshooting section
to help isolate the potential problem.
Perform an Oscillation Check
❏ Remove the spindle and turn the motor OFF.
❏ Gently push up on the viscometer coupling.
❏ Turn the coupling until the red pointer reaches 15-20 on the dial.
❏ Gently let go of the coupling.
❏ Watch the pointer swing freely and rest on zero.
If the pointer sticks and/or does not rest at zero, the unit most likely is in need of service. See Appendix
H for details on how to return your viscometer.
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