Radiator/Oil Cooler And Engine Block Heater Replacement - JLG sky trak mmv Service Manual

Engine: Cummins 4BTA 3.9
6. Replace engine side battery box cover (19). Use the
wing nuts (20) and carriage bolts (21) to secure the
cover in place.
20
19
21
7. 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.
8.6.3 Radiator/Oil Cooler and Engine Block
Heater 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 indica-
tor. 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 en-
gine damage.
a. Radiator and Oil Cooler Removal
1. Level the vehicle, ground the attachment, place the
travel select lever in NEUTRAL [N] and engage the
neutral lock lever, engage the parking brake switch
and shut off the engine. Secure accident prevention
tags to the steering wheel and ignition switch (refer
to Section 1.5, Accident Prevention Tag Usage ).
8.10
18
17
16
MM2911
WARNING:
procedure when the engine is hot. Wait for the
engine, muffler, and tailpipes to cool down
before proceeding. Failure to do so could result
in severe burns.
2. Unlatch and open the engine cover. Allow the engine
to cool before proceeding. Draining the cooling
system while the engine is hot can cause cracks in
the engine block.
3. Remove engine side battery box cover (1). Remove
wing nuts (2) and carriage bolts (3) and set cover
and mounting hardware aside for later re-assembly.
4. Disconnect the negative (-) battery cable (4) at the
negative (-) terminal on the battery in the engine side
battery box.
5. Disconnect the negative (-) cable (5) at the bottom of
the battery equalizer (6).
2
1
3
DO NOT attempt this
6
5
4
MM2911
Model MMV Rev. 12/04