Model 30000-S DHPU Manual
Rev. 0
JRK
17SEP12
Page 22
Table 1: Troubleshooting the Power Unit Engine
Problem
Solution
Engine will not start
1) Compress the spring on the starter to the cold engine
position. Attempt to start up to 3 to 5 times.
2) Check the fan belt. Replace the belt if broken.
3) Ensure the manual shutdown pull handle is not stuck
in the out position. Reset by pushing in if required.
4) 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.
5) Make sure the fuel filter is not clogged. Replace the
filter if blocked by debris, and vent the fuel system.
6) Inspect the fuel pump strainer for blockage. If dirty,
then wash per the engine manual then replace. Vent the
air out of the fuel system.
7) Ensure the correct grade of diesel fuel is utilized.
8) Add fuel additives, per the engine manual, if the
operating temp is below the start limit temperature.
9) Inspect the fuel lines and fittings for leaks or entry
points for air to enter the system. Vent the fuel system
after addressing the problem.
10) Inspect and replace the fuel injector if it is defective.
11) Verify the engine inlet-outlet valve clearance is per
the engine manual's recommendation. Adjust if required.
12) Verify the correct motor oil is being used especially in
low temperature environments. Refer to the engine
manual for further guidance.
13) Check the compression of the diesel engine. Service
engine if required.
14) Verify the trip lever on the Sentinel valve is reset.
Engine stalls or sputters/runs
unevenly
1) Ensure the correct grade of diesel fuel is utilized.
2) Inspect the fuel lines and fittings for leaks or entry
points for air to enter the system. Vent the fuel system
after addressing the problem.
3) Inspect and replace the fuel injector if it is defective.
4) Make sure the fuel filter is not clogged. Replace the
filter if blocked by debris, and vent the fuel system.
5) Inspect the fuel pump strainer for blockage. If dirty,
then wash per the engine manual then replace. Vent the
air out of the fuel system.
6) Verify the engine inlet-outlet valve clearance is per the
engine manual's recommendation. Adjust if required.
Engine speed does not return
to idle after operation
1) Lower the set point of the hydro-throttle.
2) Verify hydro-throttle spring is functioning properly.
Replace if damaged.
3) Ensure the spring on the engine throttle is returning
the lever to idle. Replace if damaged.