JLG G6-42A Operator Manual - Manual (Page 140)

Section 7 - Lubrication and Maintenance
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Engine Cooling System
A. Engine Coolant Level Check
1. Perform “Shut-Down Procedure” on page 4-4.
2. Open the engine cover.
3. Check coolant level in surge tank (1).
4. If coolant is low, allow fluid to cool.
5. Remove surge tank cap (2) slowly. Add coolant as required.
6. Replace surge tank cap.
7. Close and secure the engine cover.
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