ONL773LW4 5/21
20
Servicing
2. Here are acceptable water quality specifications:
3. If chlorides, sulfates or total dissolved solids are
higher than the above given specification, the water
must be distilled, demineralized, or
deionized before it is used in a cooling system.
4. If total hardness is higher than 170 ppm and all other
parameters are within the given
specifications, the water must be softened before it is
used to make coolant solution.
SP13. CHECK THE COOLANT LEVEL
1. Check the coolant level each day before starting the
engine. Check the water level by removing the pres-
sure cap from the radiator.
In order to give the cooling water an opportunity to
expand, the level should be about 1 in. (2.5 cm) below
the filler cap sealing surface when the engine is cold.
2. The pressure valve in the filler cap releases when the
pressure is approximately 7 PSI (0.5 bar). Use a cap
pressure tester to check cap if you suspect it is faulty.
SP14. COOLING SYSTEM FLUSHING
1. Flush the cooling system every 2500 hours or every 12
months, whichever comes first.
2. Industrial sets:
Remove radiator cap and open drain cocks on radiator
and engine block. Pour clean water into radiator until
water coming from radiator is clear of discoloration.
Close the radiator drain and continue flushing until
water from engine drain is clear. Open all drain cocks
and drain completely. Close drain cock and refill with
recommended coolant mixture. Clean fins on radiator.
3. Coolant Specifications:
Use 50% water / 50% ethylene glycol antifreeze mix.
Antifreeze mixture is recommended as a good year-
round coolant.
4. Check hoses and connections and repair any leakage.
SP16. CLEAN RADIATOR
1. Remove debris from radiator fins daily.
2. In very dusty applications, clean the radiator with
compressed air or steam cleaner every 100 hours.
Clean in the reverse direction of the airflow.
ELECTRICAL SYSTEM - GENERAL
CAUTION: Excessive non-linear loads can
lead to regulator and/or generator end failures
and should be no greater than 20% of overall
load. Failures caused by excessive non-linear
loads are not warrantable.
1. Never switch battery switch off or break the circuit
between the alternator and batteries while the engine is
running. Regulator damage can result.
2. Do NOT reverse the polarity of battery cables when
installing the battery.
3. When welding on the unit, disconnect the regulator and
battery. Isolate the leads.
4. Disconnect the battery cables when servicing the D.C.
alternator.
5. Never test with a screwdriver, etc., against any
terminal to see if it emits sparks.
6. Do not polarize the alternator or regulator.
7. A D.C. circuit breaker protects your control panel and
wiring harness. It is located in the side of the generator
junction box.
Parts Grains
Contaminates
per Million per Gallon
Maximum Chlorides
40
2.5
Maximum Sulfates
100
5.9
Maximum Dissolved Solids
340
20.0
Maximum Total Hardness
170
10.0
PH Level 5.5 to 9.0
Updated 5-13-21
