Doosan D20S-5 Operation & Maintenance Manual page 184

Maintenance Section
Engine Oil & Filter (Diesel Engine Only) - Change
.......................................................................... 222
Water Separator (4TNV98 Diesel Engine Only) -
Clean ................................................................. 223
Every 1000 Service Hours or 6 Months
Hydraulic Return Filter, Breather & Strainer - Check,
Change .............................................................. 224
Transmission Oil, Oil Filter & Strainer - Check,
Clean, Change ................................................... 225
Lift Chains - Test, Check, Adjust ........................ 225
Universal Joint - Inspect .................................... 227
Air Intake System - Change ............................... 227
Inspect Coolant Hoses (LP, Dual Fuel Engine Only)
.......................................................................... 228
LP Regulator/Converter Inspection (LP, Dual Fuel
Engine Only) ...................................................... 228
Fuel Lines & Fittings - Check ............................. 228
Inspect Mixer Assembly (G420F(E) /G424F(E)
/G424I(E) /G430FE Engine Only) ...................... 229
Inspect Throttle Assembly (G420F(E) /G424F(E)
/G424I(E) /G430FE Engine Only) ...................... 229
Engine Valve Lash (Diesel Engine Only) - Check,
Adjust................................................................. 229
Every 1500 Service Hours or 9 Months
Inspect Ignition System (LP, Gasoline & Dual Fuel
Engines Only) .................................................... 230
Replace Spark Plugs (G424F(E) LP, Dual Fuel
Engine / G430FE Engine Only) .......................... 231
Replace LP Fuel Filter Element (LP, Dual Fuel
Engine Only) ...................................................... 232
Fuel Filter (LP Engine Only) ............................... 232
Testing Fuel Lock-off Operation (LP Engine Only)
.......................................................................... 232
Fuel Injectors (Diesel Engine Only) - Inspect,
Clean, Test ........................................................ 233
Crankcase Breather
Engine Only) - Inspect ....................................... 233
Every 2000 Service Hours or Yearly
Engine Valve Lash (Diesel Engine Only) - Check,
Adjust................................................................. 234
Steer Wheel Bearings - Reassemble ................. 234
Drive Wheel Bearing (Power Shaft and Drive
Wheel) - Reassemble ....................................... 236
Cooling System - Clean, Change ...................... 237
Forks - Inspect .................................................. 239
System (4TNV98 Diesel
Every 2500 Service Hours or 15 Months
Hydraulic Oil - Check, Clean, Change ............... 241
Inspect Battery System ..................................... 241
Replace Oxygen Sensor (G420F(E) /G424F(E)
/G424I(E) /G430FE Engine Only) ...................... 242
Replace Spark Plugs (G420F(E)/G424I(E) Engine
Only) ................................................................. 243
Checking the TMAP Sensor (G420F(E) /G424F(E)
/G424I(E) /G430FE Engine Only) ...................... 244
Inspect for Intake Leaks (G420F(E) /G424F(E)
/G424I(E) /G430FE Engine Only) ...................... 244
Every 3000 Service Hours or 18 Months
Timing Belt [G420F(E)/G424F(E) LP, Gasoline,
Dual Fuel Engine Only] - Change ................... 246
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