JLG sky trak mmv Service Manual page 260

Engine: Cummins 4BTA 3.9
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 (2). Remove
wing nuts (3) and carriage bolts (4) and set cover
and mounting hardware aside for later re-assembly.
4. Disconnect the negative (-) battery cable (5) at the
negative (-) terminal on the battery in the engine side
battery box.
5. Disconnect the negative (-) cable (6) at the bottom of
the battery equalizer (7).
3
2
4
8.8
DO NOT attempt this
7
6
5
MM2911
6. Drain approximately two quarts (2 liters) of coolant.
WARNING:
severe burns or eye injury. NEVER remove the
radiator cap while the engine is hot. The cool-
ing system is under pressure. Wear protective
clothing and safety glasses.
7. Slowly turn the radiator cap (1), located in the upper
radiator hose, to the first stop and allow any
pressure to escape. Remove the radiator cap. Place
a funnel at the base of the radiator to channel the
drained coolant into a container. Open the radiator
drain plug (2) or petcock and allow the coolant to
drain into the funnel. Transfer the coolant into a
properly labeled container. Dispose of properly.
Close the radiator drain plug or petcock.
2
8. Insert a 1/2" drive ratchet or breaker bar into the
automatic belt tensioner housing (3) and remove the
tension from the fan drive belt (4).
Hot coolant can cause
1
MM2041
Model MMV Rev. 12/04