John Deere Products & Services Portable Generator DCA70SSJU4i User Manual
page 68 — dca70SSJU4i 60 hz generator • operation and parts manual — rev. #2 (04/09/14)
trOUbLeshOOtiNG eNGiNe
troubleshooting (engine)
Symptom
possible problem
Solution
Engine will not start or start is delayed,
although engine can be turned over.
No Fuel reaching injection pump?
Add fuel. Check entire fuel system.
Defective fuel pump?
Replace fuel pump.
Fuel fi lter clogged?
Replace fuel fi lter and clean tank.
Faulty fuel supply line?
Replace or repair fuel line.
Compression too low?
Check piston, cylinder and valves. Adjust or
repair per engine repair manual.
Fuel pump not working correctly?
Repair or replace fuel pump.
Oil pressure too low?
Check engine oil pressure.
Low starting temperature limit exceeded?
Comply with cold starting instructions and
proper oil viscosity.
Defective battery?
Charge or replace battery.
Air or water mixed in fuel system?
Check carefully for loosened fuel line
coupling, loose cap nut, etc.
coupling, loose cap nut, etc.
At low temperatures engine will not start.
Engine oil too thick?
Refi ll engine crankcase with correct type of
oil for winter environment.
Defective battery?
Replace battery.
Engine fi res but stops soon as starter is
switched off.
Fuel fi lter blocked?
Replace fuel fi lter.
Fuel supply blocked?
Check the entire fuel system.
Defective fuel pump?
Replace fuel pump.
Engine stops by itself during normal
operation.
Fuel tank empty?
Add fuel.
Fuel fi lter blocked?
Replace fuel fi lter.
Defective fuel pump?
Replace fuel pump.
Mechanical oil pressure shutdown sensor
stops the engine due to low oil?
Add oil. Replace low oil shutdown sensor if
necessary.
Low engine power, output and speed.
Fuel tank empty?
Replace fuel fi lter.
Fuel fi lter clogged?
Replace fuel fi lter.
Fuel tank venting is inadequate?
Ensure that tank is adequately vented.
Leaks at pipe unions?
Check threaded pipe unions tape and tighten
unions a required.
Speed control lever does not remain in
selected position?
selected position?
See engine manual for corrective action.
Engine oil level too full?
Correct engine oil level.
Injection pump wear?
Use No. 2-D diesel fuel only. Check the fuel
injection pump element and delivery valve
assembly and replace as necessary.