Graco 3A1705J important safety instructions Refill Proportioner Coolant Loop

Maintenance

6.To drain engine coolant loop:

a.Remove the engine coolant loop (RC) cap.

b.Remove engine guards as shown. Let the guards rest on the engine to access the drain valve.

Engine Coolant Loop Drain Valve

Figure 43

c.Place a waste container under the drain valve. Open the drain valve and drain coolant.

d.To refill coolant loop, see

Refill Engine Coolant Loop, page 72.

e.Replace engine shrouds. Torque screws to 25 ft-lbs (33.8 N∙m)

Refill Proportioner Coolant Loop

Note

Air needs to be purged from the proportioner coolant loop when it is filled with new coolant or when air enters the coolant system. It takes about one full warm-up and cool-down cycle to purge air from coolant.

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.

1.Before refilling coolant loop, perform steps 1–3 from Drain Coolant, page 69. Drain coolant loop if necessary.

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.

2.Remove the caps from the metal proportioner coolant loop fill bottle (HF) and expansion bottle (HB). Fill the proportioner coolant loop fill bottle (HF) to the top and add more coolant to expansion bottle (HB) until the coolant is at the cold fill line. See Coolant Specifications, page 72.

RC

HB HF

EB

Coolant System Bottles

Figure 44

70 3A1705J