JLG G5-18A Service Manual - Manual (Page 44)

Cab and Covers
4.8 G5-18A/2505
9. Loosen the hose clamps and disconnect the two
heater hoses.
10. Remove the capscrews, nuts and lockwashers
securing the heater assembly to the cab.
11. Carefully pull out the heater assembly (10). Label
and disconnect the wiring harness connections at
the blower.
12. Remove the heater assembly.
b. Heater Assembly Installation
1. Install the heater assembly (10) to its original
orientation.
2. Connect the wiring harness connections at the
blower.
3. Install the capscrews, nuts and lockwashers to
secure the heater assembly to the cab.
4. Reconnect the two heater hoses.
5. Refill the cooling system at the coolant overflow
bottle with a 50/50 mixture of ethylene glycol and
water allowing time for the coolant to fill the engine
block. See Section 2.4, “Fluids, Lubricants and
Capacities,” for system capacities.
6. Connect the battery negative (-) cable at the battery
negative (-) terminal.
7. Start the engine, run it briefly at low idle and check
the 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 the front cover (9) in the cab.
9. Check the coolant level. Add or remove fluid as
required.
10. Close and secure the engine covers.
4.4 CAB REMOVAL
Note: Replace the cab if it is damaged. Refer to the
appropriate parts manual for ordering information.
Before performing any inspection, maintenance or
service operation, thoroughly clean the machine. DO
NOT spray water or cleaning solution in, on, near or
around the operator’s dash panels and electrical
components.
Inspect the cab, its welds and mounts. If modification,
damage, a cracked weld and/or fatigued metal is
discovered, replace the cab. Contact your local JLG
distributor with any questions about the suitability or
condition of a cab.
Note: Remove and label cab components as needed
before removing the cab from the machine. Label,
disconnect and cap hydraulic hoses. Transfer cab parts
to the replacement cab after the replacement cab is
securely mounted on the machine.
1. Park the machine on a firm, level surface, fully
retract the boom, lower the boom, place the
transmission control lever in (N) NEUTRAL, engage
the park brake and shut the engine OFF.
2. Block the wheels to ensure that the machine does
not move.
3. Open the engine covers. Allow the system fluids to
cool.
4. Disconnect the battery negative (-) cable at the
battery negative (-) terminal.
Note: Steps 5 through 8 are only required if machine is
equipped with heating or heating/air conditioning.
5. Place a suitable container beneath the radiator drain
plug or petcock. Slowly turn the cap on the coolant
overflow bottle to allow any pressure to escape.
Remove the overflow bottle cap.
6. Place a funnel at the base of the radiator to channel
the drained coolant into the container. Open the
radiator drain plug or petcock and allow the coolant
to drain. Replace the drain plug or close the petcock.
7. Transfer the coolant into a suitable, covered
container, and label as "Used Coolant". Dispose of
used coolant at an approved recycling facility.
Note: Label all hoses to ensure correct installation.
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