JLG G5-18A Service Manual - Manual (Page 56)

Cab
4-8 G5-18A, 2505H, 25.5
4.4.8 Heater/Air Conditioning System
(If Equipped)
a. Removal
1. Park machine on a hard, level surface.
2. Fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL.
3. Engage park brake and shut engine OFF.
4. Place a Do Not Operate Tag on both ignition key
switch and steering wheel.
5. Properly disconnect battery.
6. Open engine cover. Allow system fluids to cool.
7. Place a suitable container beneath the radiator
petcock
8. Slowly turn the coolant surge tank cap and allow any
pressure to escape.
9. Place a funnel at base of radiator to channel drained
coolant into container.
10. Open radiator petcock and allow coolant to drain.
11. Close the radiator petcock.
12. Transfer coolant into a suitable, covered container,
and label as "Used Coolant".
13. Dispose of used coolant at an approved recycling
facility.
Note: If equipped with Air Conditioning, contact the local
JLG dealer or certified air conditioning service center for
proper draining of the air conditioner system.
Note: Label all hoses to ensure correct installation.
14. Remove front cover to expose heater/defroster
element (17).
15. Loosen hose clamps and disconnect the two
heater hoses.
16. Remove capscrews, nuts and lockwashers securing
heater assembly to cab.
17. Carefully pull out heater assembly (18). Label and
disconnect wiring harness connections at blower.
18. Remove heater assembly.
b. Installation
1. Install heater assembly (18) to original orientation.
2. Connect wiring harness connections at blower.
3. Install capscrews, nuts and lockwashers to secure
heater assembly to cab.
4. Reconnect heater hoses.
5. Refill cooling system at recovery tank with a 50/50
mixture of ethylene glycol and water allowing time for
coolant to fill engine block. See Section 2.4, “Fluids,
Lubricants and Capacities,” for system capacities.
Note: If equipped with Air Conditioning, contact the local
JLG dealer or certified air conditioning service center for
proper charging of the air conditioner system. Refer to
Section 2.4.2, “Capacities.” for refrigerant type and
capacity.
6. Properly connect battery.
7. Start engine, run it briefly at low idle and check
machine for any visual sign of fluid leakage. STOP
the machine immediately if any leakage is noted,
and make any necessary repairs before continuing.
8. Install front cover (17) in cab.
9. Check coolant level. Add or remove fluid as required.
10. Close and secure engine cover.
11. Remove a Do Not Operate Tag on both ignition key
switch and steering wheel.
4.4.9 Air Conditioning (If Equipped)
If the air conditioning system requires servicing, contact
the local JLG dealer or certified air conditioning service
center. Refer to Section 2.4.2, “Capacities.” for refrigerant
type and capacity.
MY2430
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