Nanni 5.280HE - Troubleshooting Guide; Engine Start & Running Issues

S-5
03-M Series, WSM
DIESEL ENGINE
[4] TROUBLESHOOTING
W1014322
Symptom Probable Cause Solution
Reference
Page
Engine Does Not
Start
No fuel Replenish fuel –
Air in the fuel system Vent air S-21
Water in the fuel system Change fuel and
repair or replace fuel
system
S-21, 28
Fuel hose clogged Clean or replace S-21
Fuel filter clogged Replace S-28
Excessively high viscosity of fuel or engine oil at
low temperature
Use specified fuel or
engine oil
–
Fuel with low cetane number Use specified fuel –
Fuel leak due to loose injection pipe retaining nut Tighten retaining nut S-53
Incorrect injection timing Adjust S-95
Fuel camshaft worn Replace S-62
Injection nozzle clogged Clean or replace S-54, 97
Injection pump malfunctioning Repair or replace S-57, 96
Seizure of crankshaft, camshaft, piston, cylinder
or bearing
Repair or replace –
Compression leak from cylinder Replace head
gasket, tighten
cylinder head screw,
glow plug and nozzle
holder
–
Improper valve timing Correct or replace
timing gear
S-61
Piston ring and cylinder worn Replace S-50, 64,
65, 80,
81, 88
Excessive valve clearance Adjust S-51
Stop solenoid mulfunctining Replace –
(Starter Does Not
Run)
Battery discharged Charge S-32, 33
Starter malfunctioning Replace S-52, 99,
102, 104,
105
Key switch malfunctioning Repair or replace –
Wiring disconnected Connect –
Engine Revolution Is
Not Smooth
Fuel filter clogged or dirty Replace S-28
Air cleaner clogged Clean or replace S-22, 27,
33
Fuel leak due to loose injection pipe retaining nut Tighten retaining nut S-53
Injection pump malfunctioning Repair or replace S-57, 96
Incorrect nozzle injection pressure Adjust S-54, 97
Injection nozzle stuck or clogged Repair or replace S-54, 97
Governor malfunctioning Repair S-58, 62
KiSC issued 08, 2012 A