JLG 723A Service Manual - Manual (Page 52)

Cab and Covers
4-8 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
8. Remove the seat/seat base.
9. Remove the seat plate (8) to expose the heater/
defroster element.
10. Loosen the hose clamps and disconnect the two
heater hoses.
11. If equipped, loosen, label and disconnect the two air
conditioning hoses.
12. Remove the capscrews, nuts and lockwashers
securing the heater assembly to the cab.
13. Carefully pull out the heater assembly. Label and
disconnect the wiring harness connections at the
blower.
14. Remove the heater assembly.
b. Heater Assembly Installation
1. Install the heater assembly 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. If equipped, reconnect the air conditioning hoses.
6. Refill the cooling system at the coolant overflow
bottle with coolant allowing time for the coolant to fill
the engine block. See Section 2.4, “Fluids,
Lubricants and Capacities,” for system capacities.
7. Recharge the air conditioning system. Refer to
Section 4.4.11, “Air Conditioning (If Equipped).”
8. Properly connect the battery.
9. 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.
10. Install the seat plate (8) in the cab.
11. Install the seat/seat base.
12. Check the coolant level. Add or remove fluid as
required.
13. Verify the proper operation of the heating and air
conditioning (if equipped) system.
14. Close and secure the engine covers.
15. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
4.4.11 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, “Fluids, Lubricants and
Capacities,” for refrigerant type and capacity.
4.5 CAB REMOVAL
Note: To help ensure safety and optimum performance,
replace the cab if it is damaged. Refer to the appropriate
parts manual for ordering information.
Inspect the cab, its welds and mounts. If modification,
damage, a cracked weld and/or fatigued metal is
discovered, replace the cab. Contact the local JLG dealer
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 all four wheels to help prevent the machine
from moving. Assure that there is sufficient overhead
and side clearance for cab removal.
MZ5390
8
WARNING
The protection offered by this ROPS/FOPS will be
impaired if subjected to any modification or structural
damage, at which time replacement is necessary.
ROPS/FOPS must be properly installed using
fasteners or correct size and grade, and torqued to
their specified value.