Lull 944E-42 Service Manual - Manual (Page 745)

9.235 Model 644E-42/944E-42 Rev. 6/04
Electrical System
5. Lower and lock engine cover (17). To release and
lower the engine cover from the fully raised position,
lift up slightly on the cover and push the upper part
of the right gas shock (18) (orange tab) to the left.
Line up the upper part of the shock lock tube with the
lower part of the gas shock and pull the cover down
to the closed position.
6. Operate the boom through its full range of motion;
the boom must NEVER touch the sensor.
7. Check the function of the Stabil-TRAK system as
described in Section 10, “Stabil-TRAK™ System.”
9.14.13 Engine Low Oil Pressure Switch
The engine oil pressure switch (19) is located on the
engine and is connected via the engine wiring harness,
bulkhead connector and cab wiring harness to the front
dash panel.
The front dash panel indicator (20) illuminates when
engine oil pressure is too low to properly lubricate the
engine. The warning indicator illuminates when oil
pressure is below 8.7 psi (0,6 bar) and an audible alarm
will also sound. When the engine has attained normal oil
pressure, the switch opens and the front dash panel
indicator and alarm turn OFF. (Refer to Section 9.10.3,
“Engine Oil Pressure Warning Indicator
Troubleshooting.”)
a. Engine Oil Pressure Switch Removal
1. Unlock and open the engine cover (17).
2. If the vehicle has dual batteries, disconnect both
negative battery cables (1 and 2) from both
batteries.
To access the lower battery (3), loosen the knob (4)
far enough so that the lip (5) on the upper battery box
clears the knob. Lift up the upper battery box (6) and
swing it out, so that the box clears the hydraulic tank
support bracket, to gain access to the lower negative
battery cable (1). Disconnect the lower negative
battery cable.
3. Unplug the engine low oil pressure switch
connector (1) from the wiring harness connector (2).
4. The switch (3) is threaded into the engine block.
Remove the switch.
4110390
1.
2.
OU0780
18
18
17
MU4500
19
0000000
RPM X 100
5
10
15
30
20
25
F
1/2
E 104
176
80
248
120 °C
°F
D
r/min
MU0010
20