Graco 3A1705J Drain Coolant, Perform Shutdown, Refill Proportioner Coolant Loop

Drain Coolant

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

Drain coolant from the engine and proportioner coolant loops once a year or if the coolant lines need to be disconnected, in order to install a wall between the generator and proportioner.

1.Perform Shutdown, page 63.

2.Remove the cabinet door from the front of the proportioner.

3.Turn on manual valve switch (MV), located on the load center (LC), to manually open the A and B heat exchanger control valves and bypass control valve.

Note

The battery must be connected to operate valves. The load center (LC) LEDs will stay on when the manual valve switch (MV) is in the ON position.

Maintenance

b.Place the other end of the drain tube in a waste container. Open the drain valve. Drain coolant until coolant is no longer visible in the sight glass.

Proportioner Coolant Loop Drain Valve

Figure 41

c.To refill coolant loop, see

Refill Proportioner Coolant Loop, page 70.

5.To drain proportioner coolant loop from filter housing. Only available on Series B systems.

a.Remove the proportioner coolant loop fill bottle cap (HF).

HF

LC

Figure 40

MV

H

T

D

LED Component	LED Color
Manual valve switch (MV)	Red
A Side Control Valve	Red
B Side Control Valve	Blue
Bypass Valve	Green

4.To drain proportioner coolant loop:

a.Remove the proportioner coolant loop fill bottle (HF) cap.

Filter Housing Drain Valve (D)

Figure 42

b.Place the other end of the filter housing drain tube (T) in a waste container. Open the drain valve (D).

c.To refill coolant loop, see

Refill Engine Coolant Loop, page 72.

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