DR Stump Grinder, Operating Instructions Manual

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22
DR
®
STUMP GRINDER
Troubleshooting Table (Continued)
S
YMPTOM
P
OSSIBLE
C
AUSE
Engine smokes. 
Check the oil level and adjust as needed.

Clean the Engine cooling fins and the carburetor housing if they are dirty.

The Air Filter may be dirty; change it following the procedure in the Engine Owner’s Manual.

You may be using the wrong oil. Refer to your Engine Owner’s Manual for detailed
information.

If the Engine still smokes, visit our website at www.DRpower.com.
The Engine runs well but
the Cutting Head won’t
move.

The Throttle should be fully pressed to engage Clutch.

The Cutter Head Drive Belt is off the pulleys or broken. Reinstall or change Belt (refer to
“Chapter 4: Maintaining the DR Stump Grinder”).

Confirm there is nothing wedged/ wrapped around cutter head, or Pulleys.

Confirm the throttle is moving on the engine.

Confirm that Belt has not stretched to a point that it is slipping off the Pulleys.

Clutch is not working. Change Clutch (refer to “Chapter 4: Maintaining the DR Stump
Grinder”).
The Engine does not
fully return to low idle
when the throttle is
released. 
Throttle linkage is sticking. Adjust throttle linkage (refer to “Chapter 4: Maintaining the DR
Stump Grinder”)
The Cutting Head is
rotating but the cutting
action is extremely slow
and the stump is
showing signs of
excessive heat.

The teeth are dull or damaged. Replace Teeth (refer to “Chapter 4: Maintaining the DR Stump
Grinder”).
Belt falls off Pulleys
frequently.

Check Pulleys and Belt for damage.

Check tightness of Idler Arm Pivot Bolt.
Left-side Wheel turns
forward when Brake
Lever is locked or
machine is difficult to
push when Brake Lever
is released. 
Brake Cable needs adjusting. Adjust Cable as needed (refer to “Chapter 4: Maintaining the DR
Stump Grinder”).
Set the Wheel Brake, shut down the engine, remove the spark plug wire and wait 5 minutes before performing any maintenance
procedure or inspection on the Stump Grinder.