Doosan Lift Truck GC20E-3

Hydraulic Return Filter – Change

Loosen the bolts of the hydraulic tank top plate assembly

Remove the return filter from tank top plate assembly

Install the tank top plate assembly and fasten the bolts

Start the engine and operate the hydraulic controls, and the steering system, through a few cycles to fill the lines. Look for oil leaks

Stop the engine and check the oil level. With all cylinders retracted, maintain the oil level to the FULL mark on the dip stick/filter cap assembly

Sign off on the hydraulic return filter change

Engine Valve Lash (DB33A Diesel Engine Only) - Check, Adjust

Fuel Tank Filter Cap and Screen (If Equipped) - Clean

Seat, Hood Latch & Support Cylinder - Check, Lubricate

Fuses, Bulbs, Circuit Breaker & Relay - Change, Reset

Fuse & Relay (G424E/G430E Only)

Priming the Fuel System (Diesel Engine Only)

Tires and Wheels (D, G-Series) - Inspect, Check

Carriage Roller Extrusion – Adjust;

Inspect Ignition System (LP-Gas, Gasoline & Dual Fuel Engines Only)

Replace Spark Plugs (LP-Gas, Gasoline & Dual Fuel Engines Only)

Replace LP Fuel Filter Element (LP-Gas, Dual Fuel Engine Only)

Fuel Filter(LP-Gas Engine Only)

Testing Fuel Lock-off Operation (LP-Gas Engine Only);

Warning: Ensure engine and exhaust pipe are cooled before starting the procedure

Engine stopped and exhaust pipe cooled

Electrical connector of oxygen sensor disconnected

New oxygen sensor assembled with correct tightening torque

Electrical connector of oxygen sensor connected

Sign off on the oxygen sensor replacement

Tilt Cylinders - Check, Adjust, Lubricate

Transmission Oil Filter – Change

Drive Axle Oil & Strainer - Change, Clean