Doosan Compressor 25/300

WARNING: Do not remove the cap from a HOT engine radiator. The sudden release of pressure from a heated cooling system can result in serious personal injury.

The engine cooling system is filled at the factory with a 50/50 mixture of water and ethylene glycol. This permanent type antifreeze contains rust inhibitors and provides protection to --35° F (--37°C).

The use of such a mixture is recommended for both summer and winter operation. When using water alone, be sure to add a reputable brand of rust inhibitor to prevent internal corrosion.

It is recommended to test the freezing protection of the coolant every six months or prior to freezing temperatures. Replenish with a fresh mixture every twelve months. A drain for the system is located in the bottom radiator tank. An alternate method would be to disconnect a bottom radiator hose.

Engine radiator cap removed safely?

Cooling system filled with 50/50 mixture of water and ethylene glycol?

Rust inhibitor added when using water alone?

Enter the freezing protection of the coolant

Scavenge Orifice & related parts check

Wheels (bearings, seals, etc) check

Sign off on the compressor maintenance

Warning: Ensure the compressor is turned off and cooled down before starting the maintenance.

Check for grease, oil and dirt accumulation on the exterior surfaces of the oil cooler.

If accumulation is present, proceed with the following steps.

Upload a photo of the oil cooler before cleaning.

Clean the oil cooler by directing compressed air containing a nonflammable safety solvent through the core.

Upload a photo of the oil cooler after cleaning.

Check for foreign deposits such as sludge and lacquer in the oil cooler.

If foreign deposits are present, proceed with the following steps.

Enter the name of the cleaning compound used.

Warning: This maintenance check requires trained personnel with PPE!

All intake lines to and from the air cleaners inspected

Engine cooling system hoses inspected

All flexible hoses used for air, oil, and fuel inspected

All rubber hose joints and screw-type hose clamps are tight

No signs of wear or deterioration on hose connections

No dust-laden air entering the engine’s combustion chamber or the compressor intake

No signs of wear and deterioration on flexible hoses used in the fuel, oil and air lines

Warning: This procedure requires trained personnel with PPE!

Trailer secured on adequate capacity jack stands

Adjusting hole cover removed from the adjusting slot on the bottom of the brake backing plate

Brake shoes expanded until the pressure of the linings against the drum makes the wheel very difficult to turn

Starwheel rotated in the opposite direction until the wheel turns freely with a slight lining drag

Adjusting hole cover replaced and wheel lowered to the ground

Repeat above procedures on all brakes

Sign off on the brake adjustment