Hobart 9OC24S Operation Manual page 144

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OPERATION, MAINTENANCE ,, AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
CAUTION: (a) DO NOT USE "METHANOL" OR ALCOHOL AS AN ANTI-
FREE ZE .
(b) DO NOT MIX BRANDS OR TYPES OF ANTIFREEZE. A
SOLUTION CONTAINING TWO OR MORE TYPES OF
ANTIFREEZE IS IMPOSSIBLE TO TEST ACCURATELY.
(2) Selecting antifreeze
(a) Select a permanent type antifreeze known to be satisfactory for use with
chromate corrosion resistor.
(b) When it is not known if the antifreeze is satisfactory for use with chromate
resistor, check with local Cummins Distributor for a list of compatible anti-
freezes.
CAUTION: DO NOT USE SOLUBLE OIL IN THE COOLING SYSTEM.
(3) Checking antifreeze solution
Check the solution with a reliable tester when in doubt about antifreeze pro-
tection .
NOTE:
(a) When testing, be sure coolant is at operating temperature.
(b) Follow manufacturer's instructions cn tester.
F.
Draining the Cooling System
To drain the cooling system, proceed as follows:
(1) Remove radiator cap.
(2) Open radiator drain valve and remove engine drain plugs (see Fig. 13).
NOTE: When draining the system for storage, remove all drain valves and
remove drain plugs.
(3) Allow the system to drain completely.
NOTE: Be sure the drain valves do not plug-up during draining.
(4) When the system is completely drained, close all drain valves and install
plugs.