Graco 3A1705J important safety instructions Refill Engine Coolant Loop, Coolant Specifications

Maintenance

Refill Engine Coolant Loop

Refill the engine coolant loop when the coolant is below the cold level line at ambient temperature.

To avoid burns, do not perform maintenance on the coolant system until the coolant system has reached ambient temperature.

Only use coolant solutions that are compatible with the system. See Coolant Specifications, page 72.

NOTICE

Do not refill with drained coolant. Use only fresh, new coolant to avoid contaminants.

NOTICE

Do not use any “stop leak” additives to prevent plugged filters and small orifices.

NOTICE

Do not interchange the two caps between the radiator and coolant bottle. The caps have different pressure ratings that affect the overflow.

1.Perform Shutdown, page 63.

2.Remove the engine radiator coolant cap (RC) and fill until the coolant reaches the bottom of the neck. Replace cap. See Coolant Specifications, page 72.

3.Remove the cap from the engine coolant loop bottle (EB) and fill until the coolant is at the hot level. Replace cap.

4.Press start button twice on the engine control module.

5.Turn main power switch ON.

6.Inspect coolant loops for leaking fittings or valves.

7.The coolant has reached operating temperature when the radiator fan turns on. When the fan turns on, turn the main power switch OFF.

8.Press to stop the generator.

9.Add more coolant to expansion bottle (EB) after the coolant system temperature lowers to ambient temperature. Repeat until coolant level stays at cold level when at ambient temperature. It may take a few cycles to remove all air out of coolant system.

Coolant Specifications

NOTICE

Do not refill with straight water or tap water. Changing the 50% mix ratio use of tap water will allow fittings to rust.

Only refill the coolant loops with a solution of 50% distilled or soft water and 50% green ethylene glycol antifreeze with a corrosion inhibitor. Do not use common tap water; it contains chlorides and minerals which form scale on the coolant system walls. Do not use any stop leak products. The additives in these products will clog the heat exchanger and fluid valves, decreasing system performance. Use only antifreeze that meets specification ASTM D3306–89, BS658, or AS 2108. A pre-diluted mix is recommended, such as PEAK Ready Use 50/50 Pre-Diluted.

72 3A1705J