Troubleshooting - MULTIQUIP MAYCO Series Operation Manual

Symptom
Engine will not start or start is delayed,
although engine can be turned over.
At low temperatures engine will not start.
Engine fires but stops soon as starter is
switched off.
Engine stops by itself during normal
operation.
Low engine power, output and speed.
MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19) — PAGE 57
Table 6. Troubleshooting (Diesel Engine)
Possible Problem
No Fuel reaching injection pump?
Defective fuel pump?
Fuel filter clogged?
Faulty fuel supply line?
Compression too low?
Fuel pump not working correctly?
Oil pressure too low?
Low starting temperature limit exceeded?
Defective battery?
Air or water mixed in fuel system?
Engine oil too thick?
Defective battery?
Fuel filter blocked?
Fuel supply blocked?
Defective fuel pump?
Fuel tank empty?
Fuel filter blocked?
Defective fuel pump?
Mechanical oil pressure shutdown sensor
stops the engine due to low oil?
Fuel tank empty?
Fuel filter clogged?
Fuel tank venting is inadequate?
Leaks at pipe unions?
Engine oil level too full?
Injection pump wear?

TROUBLESHOOTING

Solution
Add fuel. Check entire fuel system.
Replace fuel pump.
Replace fuel filter and clean tank.
Replace or repair fuel line.
Check piston, cylinder and valves. Adjust
or repair per engine repair manual.
Repair or replace fuel pump.
Check engine oil pressure.
Comply with cold starting instructions
and proper oil viscosity.
Charge or replace battery.
Check carefully for loosened fuel line
coupling, loose cap nut, etc.
Refill engine crankcase with correct type
of oil for winter environment.
Replace battery.
Replace fuel filter.
Check the entire fuel system.
Replace fuel pump.
Add fuel.
Replace fuel filter.
Replace fuel pump.
Add oil. Replace low oil shutdown sensor
if necessary.
Replace fuel filter.
Replace fuel filter.
Ensure that tank is adequately vented.
Check threaded pipe unions tape and
tighten unions a required.
Correct engine oil level.
Use No. 2-D diesel fuel only. Check
the fuel injection pump element and
delivery valve assembly and replace as
necessary.