Model 30000-S DHPU Manual
Rev. 0
JRK
17SEP12
Page 23
Motor stops unexpectedly
1) Check the fan belt. Replace the belt if broken. Inspect
only when the engine is stopped and not running!
2) Verify the diesel tank is not empty. If the unit was
allowed to run dry, then vent air out of the fuel lines per
the engine manual.
3) Check for low oil pressure or high oil temperature.
4) Ensure the manual shutdown pull handle is not stuck
in the out position. Reset by pushing in if required.
5) Check the pressure setting on the hydraulic pump. If it
is set too high, then the engine can stall out when the
tong is stalled during make or break.
6) Verify that the engine speed does not exceed the
setting of the over speed safety feature. Adjust the
maximum travel set screw if necessary.
Engine oil pressure is low
1) Verify the motor level is at the correct height. Fill up if
the level is low.
2) Check the motor oil and replace if it is the wrong SAE
grade or if the oil is of poor quality.
3) Inspect the engine for excessive inclination. Replace
or rebuild the diesel motor if required.
Engine runs too hot
1) Verify the motor level is at the correct height. Fill up if
the level is low and drain if too high.
2) Inspect the engine air filter for debris. Clean or
replace if clogged.
3) Ensure the engine fan blade is turning. Inspect the
tension in and condition of the fan belt. Replace if the
belt is worn. Adjust idler to maintain correct tension.
Never inspect or operate on the fan system with the
diesel engine running!
4) Inspect and replace the fuel injector if it is defective.
Engine creating excessive blue
colored smoke
1) Replace motor oil if the wrong grade or of poor quality.
2) Inspect the engine for excessive inclination. Replace
or rebuild the diesel motor if required.
3) Check the motor oil level to ensure it is not too high.
4) Verify fluid in the oil bath air cleaner is not too high.
Engine creating excessive
white colored smoke
1) Ensure the correct grade of diesel fuel is utilized.
2) Add fuel additives, per the engine manual, if the
operating temperature is below the start limit
temperature.
3) Verify the engine inlet-outlet valve clearance is per the
engine manual's recommendation. Adjust if required.
4) Inspect and replace the fuel injector if it is defective.
Engine creating excessive
white colored smoke
1) Ensure the oil bath air cleaner is clean and not
contaminated with debris.
2) Verify the engine inlet-outlet valve clearance is per the
engine manual's recommendation. Adjust if required.
3) Inspect and replace the fuel injector if it is defective.
