10.13.18 Engine Block Heater - JLG sky trak mmv Service Manual

Electrical System

10.13.18 Engine Block Heater

The engine is equipped with an engine block heater (1)
that can be plugged into a standard 110/120V A.C.
grounded outlet to heat the engine coolant. When tem-
peratures are below 10° F (-12° C), the block heater
should be used.
a. Engine Block Heater Removal
1. Level the vehicle, ground the attachment, place the
travel select lever in NEUTRAL (N), engage the
parking brake switch, engage the neutral lock lever
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 ).
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.
10.166
2
1
4
3
MM5180
DO NOT attempt this
3. Remove engine side battery box cover (5). Remove
wing nuts (6) and carriage bolts (7) and set cover
and mounting hardware aside for later re-assembly.
4. Disconnect the negative (-) battery cable (8) at the
battery negative (-) terminal on the battery in the
engine side battery box.
5. Disconnect the negative (-) cable (9) at the bottom of
the battery equalizer (10).
6
5
7
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.
6. Place a suitable container beneath the radiator drain
plug (11) or petcock. Slowly turn the radiator cap
(12), located in the upper radiator hose, to the first
stop and allow any pressure to escape. Remove the
radiator cap.
10
9
8
MM2911
Hot coolant can cause
Model MMV Rev. 12-04