Farymann Diesel 37E, Repair Manual

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TROUBLESHOOTING
68
11. Troubleshooting
This section aims to suggest possible causes and remedies for faults. Please note that this
list can never be complete. Whenever there is a fault, the guiding principle should be:
“Think Before You Act”.
11.1 Engine will not start
Reason Causes Remedy
If the injection noise (rasping)
cannot be heard:
Fuel supply failure - turn the
engine over by hand crank-
ing, and listen for the charac-
teristic rasping noise in the
injector.
If the rasping noise can be
heard:
No fuel in tank.
Acceleration lever at stop.
Vent valve in tank cap blocked.
Fuel line blocked.
Fuel filter clogged.
Broken fuel line or leaking connec-
tions.
Vapor lock (fuel too hot).
Paraffin precipitation in fuel (in cold
seasons)
Faulty injector nozzle.
Faulty injector pump.
Gasoline instead of diesel in tank.
Air intake blocked.
Fill with fuel; no venting needed.
Set lever to full load
Renew cap
Check lines.
Renew filter.
Renew pipe / tighten connections.
Cool the fuel.
Drain and flush system, renew fuel
filter. Use winter fuel.
Check / repair / renew nozzle.
Check / repair / renew pump.
Drain gasoline, flush and fill with
diesel.
Check intake system.
Change filter insert.
Poor compression Incorrect valve clearance.
Decompression device defective.
Leaky valves.
Valves sticking.
Leaky cylinder head/
cylinder head seal.
Piston rings stuck in grooves.
Worn cylinder and piston.
Adjust valve clearance.
Check / renew decompression
device.
Check /repair / renew valves.
Free valves.
Tighten nuts / renew seal.
Check / free / renew the rings.
Overhaul the engine.
Difficult to crank start the
engine
Starting load too high.
Lubricating oil too thick.
Bearings seized.
Piston seized. Reduce load.
Change oil; use correct viscosity.
Overhaul engine.
Overhaul engine.