JLG 534D-10 - Manual (Page 116)

Engine
7.8 534D-9, 534D-10 & 544D
5. Run the engine to operating temperature. Visually
check for leaks with the engine running. Check the
coolant level in the overflow bottle and fill, or drain,
as necessary.
7.7.3 Radiator/Oil Cooler and Replacement
Before considering radiator or oil cooler replacement for
other than obvious damage, conduct a cooling system
pressure test check the coolant specific gravity, coolant
level, fan belt tension and dash panel temperature
indicator.
• If the engine runs hot, check the temperature of
the upper radiator hose.
• If the hose is not hot, the thermostat may be
stuck in the closed position.
• If the engine has overheated, performance may
suffer, indicating other damage including a leaking
cylinder head gasket, cracked cylinder head or
block, and/or other internal engine damage.
a. Radiator/Oil Cooler Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the travel select lever in the (N) NEUTRAL
position, engage the parking brake, and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Remove the battery negative (-) cable from the
battery negative (-) terminal.
5. Slowly turn the radiator cap to the first stop and allow
any pressure to escape. Remove the radiator cap.
6. Remove the dust shield under the engine.
7. Place a suitable container beneath the radiator
drain.
8. Place a funnel at the base of the radiator to channel
the drained coolant into a container. Loosen the
drain cock and slowly remove to allow the coolant to
drain. Transfer the coolant into a properly labeled
container. Dispose of properly if coolant needs to be
replaced. Tighten the radiator drain cock.
9. Loosen and remove the coolant overflow tank
(Cummins Only).
John Deere
Cummins
10. Loosen and remove both charge air tubes (1) from
the charge air cooler.
11. Loosen the radiator clamp on the top and bottom
radiator hoses (2). Work the hose off the radiator.
Position the hose out of the way to allow radiator
removal, or remove the hose from the engine.
Inspect the hose, and replace if necessary.
12. Label, disconnect and cap all hydraulic hoses (3)
attached to the oil cooler. Cap all fittings and
openings to prevent dirt and debris from entering the
hydraulic system.
13. Loosen the radiator fan shroud if necessary.
14. Remove the nuts and washers from the four radiator
mounts.
15. Carefully lift the radiator/oil cooler out of the engine
compartment.
Note: If more clearance is needed to remove the
radiator, the engine fan may be removed for easier
access.
MX0990
1
1
2
2
3
3
MX1250
1
2
3
3