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RG74DXH Operator · Service · Maintenance Manual
Cooling System - Check
NOTICE
The coolant level should be checked daily.
Check the cooling level in the radiator.
1. When it is below the sight glass (1) shown above
2. When the coolant level drops due to evaporation, add
50% water-antifreeze mix only up to the full line.
3. Periodically inspect the coolant system for obstructions
and debris. Clean out the cooling system and the engine
compartment as described in the Cummins Engine
Manual.
Radiator
Flush & Refill
DO NOT REMOVE RADIATOR CAP AFTER ENGINE
HAS BEEN OPERATED OR ENGINE IS HOT.
• Remove the radiator cap (2)
• Place a container under the radiator drain and loosen
the drain plug (3).
48
1
2
• When the radiator is empty, re-tighten the radiator
drain plug (3).
• When refilling the radiator, see your Cummins Engine
Manual for coolant specifications.
• With the radiator cap removed, start the engine.
• Check the amount of fluid in the radiator (1), adding
coolant as necessary.
• When the coolant level in the radiator remains constant,
replace the cap on the radiator and re-secure the cover
to the top of the engine enclosure.
Air Cleaner
Clean & Change Cartridges
6
3
4
5
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