Doosan Forklift G30N-7

Hydraulic Oil - Check, Clean, Change

Park the lift truck level with the forks lowered, parking brake engaged, transmission in NEUTRAL and the engine stopped.

Remove the hydraulic tank drain plug. Allow the oil to drain into a suitable container. Clean and install the plug.

Remove the dipstick/filter cap assembly.

Install the dipstick/filter cap assembly.

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 dipstick/filter cap assembly.

Safety Warning: Read and understand the warnings and instructions in the Safety section of the manual before performing any operation or maintenance procedures.

Engine Oil & Filter (G424P(E) Engine Only) - Change

Operate lift truck to warm oil. Park the lift truck with the forks lowered, parking brake applied, transmission in neutral and the engine stopped.

Raise rear of lift truck off ground and block securely.

Warning: Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin.

Remove the crankcase drain plug and allow oil to drain into a suitable container. Clean and install drain plug.

Raise the hood and seat assembly.

Remove and discard oil filter element.

Wipe sealing surface of oil filter element mounting base. Make sure the entire old gasket is removed.

Hydraulic Return Filter, Breather & Strainer - Check, Change

Steps to change Hydraulic Return Filter, Breather & Strainer

Transmission Oil, Oil Filter & Strainer - Check, Clean, Change

Lift Chains - Test, Check, Adjust

Every 2000 Service Hours or Yearly

You must read and understand the warnings and instructions contained in the Safety section of this manual, before performing any operation or maintenance procedure.

1) Engine Valve Lash (Diesel Engine Only) – Check, Adjust

2) Steer Wheel Bearings - Reassemble

Park the lift truck level with the forks lowered, parking brake engaged, transmission in NEUTRAL and the engine stopped.

1. Lift the steer wheels off the ground. Place stands or blocking under the frame and steer axle to support the lift truck.

2. Remove the hub cap which is pressed into the wheel hub.

3. Straighten the lock washer tangs.

4. Remove the locknut, lock washer and flat washer.

Every 1500 Service Hours or 9 Months

1) Inspect Ignition System (LP, Dual Fuel Engine Only)

2. Remove and inspect the spark plugs. Replace as required.

3. Test secondary cables with an Ohmmeter. If the maximum resistance is higher than 25 kOhms, repair and/or replace(G424F(E) engine only).

4. Inspect the ignition coil for cracks and heat deterioration. Visually inspect the coil heat sink fins. If any fins are broken replace as required.

2) Replace Spark Plugs (LP, Dual Fuel Engine Only)

2. Using a gentle twisting motion remove the high voltage cables from the spark plugs. Replace any damaged cables.