JLG 4017RS Service Manual - Manual (Page 119)

7-5 3614RS, 4017RS
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 radi-
ator 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 in (N)
NEUTRAL, 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 pan (4) 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 and slowly
remove to allow coolant to drain. Transfer coolant into a
properly labeled container. Dispose of properly if
coolant needs replaced. Close radiator drain plug.
12. Label and disconnect the outer hydraulic cooler hose
(5). Cap all fittings and openings to prevent
dirt and debris from entering hydraulic system.
M 7440 Z
2
3
4
M 7430 Z
5
5