Hobart 9OC24S Operation Manual page 143

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OPERATION, MAINTENANCE, AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
(2) Remova I
To remove, turn the cap to the left (counterclockwise) to the safety stop.
When all pressure is released', press down on the cap and continue to turn
until the cap is free to be removed.
WARNING: WHEN REMOVING CAP FROM A VERY HOT RADIATOR,
DO NOT TURN CAP PAST SAFETY STOP UNTIL ALL
PRESSURE OR STEAM HAS ESCAPED .
CAUTION:
ALLOW ENGINE TO COOL BEFORE ADDING COOLANT.
NOTE: Do not attempt to repair the valve in a radiator cap. Replace
with a new cap.
(3) lnsta I lation
When installing the cap, be sure it is turned clockwise as far as it will go
so that the pressure retaining valve will be functional.
C. Coolant
The preparation and maintenance of the coolant solution is so important to engine
life and is so completely covered in the engine manufacturer's manual, "Operation
and Maintenance Manual",
that we will not attempt to condense or explain it
here. For information regarding coolant specifications, testing equipment, anti-
freeze, etc.,
refer to Cummins Operation and Maintenance Manual, or consult
the local Cummins Distributor.
D. Warm Weather Operation (No Antifreeze)
When the unit is operated with plain water coolant during warm seasons, or in
climates where antifreeze protection is not required, the engine must have chromate
protection at all times. Change corrosion resistor element regularly after each 400
hours of operation. Use only Cummins element number 171645 (Fleetguard no.
WF 1004).
CAUTION: NEVER USE SOLUBLE OIL IN THE COOLING SYSTEM.
E.
Cold Weather Operation (Using Antifreeze)
(1) General
A permanent type antifreeze is recommended for use in the cooling system.
act 30/73