JLG Skytrak 6036 Service Manual page 268

Section 10. Electrical System
Trouble
Bulbs in warning
lights gauge fail to
light when test
button is pressed.
Bulbs in warning
lights gauge light
continuously
when ignition key
switch is in RUN
position.
Gauges and Indicator Lights—ENGINE LOW OIL PRESSURE SWITCH
Oil Pressure
Indicator does not
go out when the
engine is running.
With a good oil
pressure indicator
bulb and the
ignition key in
RUN, oil pressure
indicator does not
light before
engine is started.
Gauges and Indicator Lights—LOW OIL PRESSURE SWITCH FOR STEERING AND
Steering and
emergency
hydraulic pump
fails to operate
when engine oil
pressure is low.
Steering and
emergency
hydraulic pump
operates when
engine oil
pressure is
normal.
10-74
Probable Cause
Gauges and Indicator Lights—WARNING LIGHTS
1. Bulbs are burned out.
2. No voltage at warning
lights gauge (51, Fig 10.5);
loose or broken wiring or
circuit breaker (12) doesn't
reset.
3. Defective sender switches.
1. Defective test switch (47,
Fig. 10.5).
2. Short circuit in wiring.
3. Defective sender switches.
If the oil level and oil pressure
are good and voltage is zero
at wire 16, Fig. 10.5, check for
shorts to ground.
1. Oil pressure switch (29,
Fig. 10.5) should be
closed.
2. There is battery voltage at
wire 16, Fig. 10.5, with the
ignition key in RUN and the
engine not running.
EMERGENCY HYDRAULIC PUMP
1. Oil pressure switch (31,
Fig. 10.5) should be
closed.
2. There is battery voltage at
wire 4, Fig. 10.5, with the
ignition key in RUN and the
engine not running.
1. Oil pressure switch (31,
Fig. 10.5) should be open.
2. There is battery voltage at
wire 4 with the ignition key
in RUN and the engine not
running.
Remedy
Replace bulbs.
Test switches for continuity
under the appropriate
conditions and replace as
required.
Replace switches.
Check test switch for
continuity and replace switch
if closed in the released
position.
Determine and repair the
cause of the short circuit.
Test switches for continuity
under the appropriate
conditions and replace as
required.
If there are no shorts to
ground, install a new oil
pressure switch.
If open, replace oil pressure
switch.
Install a new oil pressure
switch.
If open, replace oil pressure
sender/switch.
Install a new oil pressure
switch.
If closed, replace oil pressure
switch.
Install a new oil pressure
sender/switch.
Model 6036 S/N 9B0499 and Before
Reference
See para. 10.8.4
See para. 10.8.4
thru 10.8.8
See para. 10.8.5
thru 10.8.8
See para. 10.8.4
See para. 10.8.5
thru 10.8.8
See para. 10.8.5
See para. 10.8.5
See para. 10.8.5
See para. 10.8.5
See para. 10.8.5
See para. 10.8.5
See para. 10.8.5