inspection/setup
Coolant (Antifreeze/summer coolant)
Perkins recommends antifreeze/summer coolant, for use in their engines, which can be purchased in concentrate (and mixed with 50% demineralized water) or
WARNING
If adding coolant/antifreeze mix to the radiator, do not remove the radiator cap until the unit has completely cooled. The possibility of hot coolant exists which can cause severe burns.
The engine coolant capacity is 3.8 quarts (3.6 liters).
Operation in Freezing Weather
When operating in freezing weather, be certain the proper amount of antifreeze (Table 10) has been added.
Table 10. Anti-Freeze Operating Temperatures
Vol % | Freezing Point | Boiling Point | |||
Anti- | °C | °F | °C | °F | |
Freeze | |||||
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50 | 108 | 226 | |||
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NOTICE
When the antifreeze is mixed with water, the antifreeze mixing ratio must be less than 50%.
Cleaning the Radiator
The engine may overheat if the radiator fins become overloaded with dust or debris. Periodically clean the radiator fins with compressed air. Cleaning inside the machine is dangerous, so clean only with the engine turned off and the negative battery terminal disconnected.
Air Cleaner
Periodic cleaning/replacement is necessary. Inspect it in accordance with the Perkins Engine Owner’s Manual.
Fan Belt Tension
A slack fan belt may contribute to overheating, or to insufficient charging of the battery. Inspect the fan belt for damage and wear and adjust it in accordance with the
Perkins Engine Owner’s Manual.
The fan belt tension is proper if the fan belt bends 10 to 15 mm (Figure 12) when depressed with the thumb as shown below.
Figure 12. Fan Belt Tension
CAUTION
NEVER place hands near the belts or fan while the generator is running.
Battery
This unit is of negative ground. DO NOT connect in reverse. Always maintain battery fluid level between the specified marks. DO NOT over fill. Battery life will be shortened if the fluid level is not properly maintained. Add only distilled water when replenishment is necessary.
Check to see whether the battery cables are loose. Poor contact may result in poor starting or malfunction. Always keep the terminals firmly tightened. Coat the terminals with an approved battery terminal treatment compound. Replace battery with only recommended type battery.
The battery is sufficiently charged if the specific gravity of the battery fluid is 1.28 (at 68° F). If the specific gravity should fall to 1.245 or lower, the battery is dead and needs to be recharged or replaced.
Before charging the battery with an external electric source, be sure to disconnect the battery cables.
MQP20P STANDBY GENERATOR • operation and parts manual — rev. #1 (11/28/11) — page 25
