JLG 4017PS Operator Manual - Manual (Page 171)

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