Coolant Temperature And Oil Pressure Switches - Genie Z-34/22 Service Manual

April 2016
3 Tighten the set screw on the pulley bushing
hand tight.
4 Slide the engine pulley onto the pulley
bushing.
5 Install the pulley mounting bolts and tighten
them to specification. Refer to Specifications,
Generator Specifications.
Component damage hazard. Do
not overtighten the pulley
mounting bolts. There must be a
gap visible between the engine
drive pulley and the pulley
bushing.
1 gap
2 shaft
3 set screw
4 engine drive pulley
5 engine drive pulley bolt
6 shaft bushing
7 woodruff key
Part No. 139234
6 Check the alignment between the engine drive
pulley and the generator pulley using a
straightedge. Refer to Specifications,
Generator.
Note: If the pulley alignment is not within
specification, remove the engine pulley and repeat
steps 2 through 6. Refer to Repair Procedure, How
to Remove the Engine Drive Pulley.
Coolant Temperature and Oil
Pressure Switches
The engine coolant temperature switch is a
normally open switch. The switch contacts close at
approximately 225°F / 107°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. An over-
temperature indicator light at the ground controls
should turn on when the switch closes.
The engine oil switch is a normally closed switch.
The switch contacts open at approximately 7 psi /
0.48 bar. If the oil pressure drops below the switch
point, the contacts open and the engine will shut off
to prevent damage. A low oil pressure indicator
light at the ground controls should turn on when the
switch opens.
Z-34/22 Bi-Energy
Service Manual
Engines
Component damage hazard.Do
not crank the engine with the
over-temperature light on.
Component damage hazard.Do
not crank the engine with the low
oil pressure light on.
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