JLG 4017PS Service Manual - Manual (Page 121)

7-5 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
Engine
7.4.3 Radiator Assembly Replacement
Before considering radiator assembly replacement for
other than obvious damage, conduct a cooling system
pressure test check coolant specific gravity, coolant level,
fan belt tension and dash panel temperature indicator.
• If engine runs hot, check temperature of upper
radiator hose.
• If hose is not hot, thermostat may be stuck in
closed position.
• If 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 Assembly Removal
1. Park machine on a firm, level surface, level machine,
fully retract boom, lower boom, place transmission
control lever in the (N) NEUTRAL position, engage
parking brake, and shut engine OFF.
2. Place a Do Not Operate Tag on both ignition key
switch and steering wheel.
3. Open engine cover. Allow system fluids to cool.
4. Properly disconnect battery.
5. Remove hood (2), end cover (3) and belly pans from
engine compartment.
6. Place a suitable receptacle under transmission drain
plug. Remove transmission drain plug, and allow the
transmission oil to drain into receptacle.
7. Transfer used transmission oil into a suitable,
covered container, and label container as “Used Oil.”
Dispose of used oil at an approved recycling facility.
Clean and reinstall transmission drain plug
8. Drain hydraulic oil reservoir. Refer to Section 8.7.1,
“Hydraulic Oil Reservoir Draining.”
9. Slowly turn surge tank cap to first stop and allow any
pressure to escape. Remove surge tank cap.
10. Place a suitable container beneath radiator drain.
11. Place a funnel at base of radiator to channel drained
coolant into a container. Open drain plug (5) and
slowly remove to allow coolant to drain. Transfer
coolant into a properly labeled container. Dispose of
properly if coolant needs to be replaced. Close
radiator drain plug.
12. Label and disconnect electrical connectors at
hydraulic cooling fan valve (6). Remove grommet
from fan shroud and pull wire harness/connectors
through fan shroud opening and place on engine.
13. Label and disconnect both transmission cooler
hoses (7). Cap all fittings and openings to prevent
dirt and debris from entering hydraulic system.
14. Label and disconnect the outer hydraulic cooler
hose (8). Cap all fittings and openings to prevent dirt
and debris from entering hydraulic system.
15. Loosen and remove two radiator assembly mounting
bolts, washers and (if equipped) shims (9). Note the
number of shims being used and there location.
MZ6550
2
3
MZ6560
5
7
6
8
7
9
9