Terex Genie AL5HT, Service Manual

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Service Manual May 2015
Isuzu 4LE1 Engine
54 AL5HT Part No. 1265482
5-1
Timing Adjustment-Isuzu 4LE1
Complete information to perform this procedure is
available in the Isuzu 4LE1 Workshop Manual
(Isuzu part number: IDE-2270).
Isuzu Workshop Manual
Genie part number 116166
5-2
Glow Plugs-Isuzu 4LE1
1 Disconnect the wiring and buss bar from the
glow plugs.
2 Connect the leads from an ohmmeter between
each glow plug terminal and ground.
Result: The resistance should be
approximately 1 ohm.
Result: The resistance is 0 ohm or greater
than 1 ohm. The glow plug is faulty.
5-3
Coolant Temperature and Oil
Pressure Switches-Isuzu 4LE1
The engine coolant temperature switch is a
normally open switch. The switch contacts close at
approximately 221°F / 105°C. If the coolant
temperature rises above the switch point, the
switch contacts close and the engine will shut off to
prevent damage. The engine will not start until the
temperature drops below the switch point.
Additionally a low coolant level can cause the
coolant temperature switch to not work properly.
Make sure that the coolant system is at proper
level.
The engine oil pressure switch is a normally closed
switch. The switch contacts open at approximately
14 psi / 0.96 bar. If the oil pressure drops below the
switch point, the contacts open and the engine will
shut off to prevent damage.