53
TROUBLESHOOTING GUIDE, CONT’D.
PROBLEM
POSSIBLE CAUSE
BASE SYSTEM TEST PROCEDURE / REMEDY
Chatter from
main drive unit
Clutch improperly
engaged
Knob should be seated firmly against drive unit. Turn drive clutch knob
fully clockwise while gently rocking the machine forward and backward
to fully engage the drive pinion. The rocking motion is necessary to help
ensure proper gear mesh (see page 6).
Wheel engagement
knob improperly
engaged
Wheel support bar should seat firmly against carriage rib. Turn the wheel
engagement knob (A) on the side of the carriage until the wheels are fully
moved towards the center of the carriage (engaged) (see page 6).
Carriage wheels out of
adjustment
Follow setup procedure for Wheel Adjustment and Alignment (page 7).
Worn or damaged rail
Visually inspect for damage or worn part. Replace if necessary.
Worn or damaged
pinion gear
Visually inspect for damage or worn part. Replace if necessary. See
Master Drive Unit / Technical Data (page 8).
Clutch assembly
improperly adjusted
Note: This is factory set. Examine all other possibilities first. For proper
pinion adjustment, allow 1/16th back lash in drive carriage movement on
rail. To increase or decrease pinion engagement, increase or decrease the
overall length of the clutch adjustment mechanism by adjusting items #32
and #37 on the MPD-1000 Master Drive Unit Exploded View / Parts List
(page 9).
