Multiquip MQP20P Flushing Out Radiator and Replacing Coolant, Radiator Cleaning, Potentiometers

maintenance

Flushing Out Radiator and Replacing Coolant

1.Remove radiator cap. Remove the coolant drain plug. Move the lever to the open position to start draining out coolant. See Figure 25.

Remove

Radiator Cap

Radiator Cleaning

The radiator (Figure 26) should be cleaned with a high- pressure washer when excessive amounts of dirt and debris have accumulated on the cooling fins or tube. When using a high pressure washer, stand at least 5 feet (1.5 meters) away from the radiator to prevent damage to the fins and tube.

Battery

Charger

Turn to

Radiator

Radiator Drain

Remove

Drain Plug

Open

Figure 26. Radiator Cleaning

Figure 25. Draining Coolant

2.Flush the radiator by running clean tap water through radiator until signs of rust and dirt are removed. Do not clean radiator core with any objects, such as a screwdriver.

3.Check hoses for softening and kinks. Check clamps for signs of leakage.

4.Move lever to the closed position and reinstall coolant drain plug.

5.Replace with coolant as recommended by the engine manufacturer.

6.Close radiator cap tightly.

WARNING

Allow engine to cool before flushing out radiator. Flushing the radiator while hot could cause serious burns from water or steam.

voltage regulator adjustments

When the voltage regulator is defective or broken and is replaced, the following adjustment procedure needs to be performed on the newly installed voltage regulator.

Potentiometers

Figure 27 shows the screwdriver adjustable potentiometers on the front of the voltage regulator.

VOLTAGE REGULATOR

VOLT STAB U/F

1

3

2

Figure 27. Voltage Regulator Potentiometers

1.Coarse Voltage Adjust — A screwdriver adjustable potentiometer on the front of the voltage regulator

page 34 —MQP20P STANDBY GENERATOR • operation and parts manual — rev. #1 (11/28/11)