Lull 944E-42, Service Manual

Page: 663 / 844

9.155 Model 644E-42/944E-42 Rev. 6/04
Electrical System
9.10.7 Dual Hydraulic Oil Temperature Warning Indicator Troubleshooting
0000000
RPM X 100
5
10
15
30
20
25
F
1/2
E
104
176
80
248
120
°C
°F
D
r/min
Check hydraulic fluid level.
Check for plugged condition
or debris on oil cooler.
Hydraulic oil temperature
warning indicator stays
ON while operating.
Repair as needed.
Disconnect harness at
switch. Indicator light
should go out.
Replace hydraulic oil
temperature switch
and retest system.
If OK
If OK
Check circuit for grounded
wire [D9A] (YEL/GRN).
If grounded, repair wire.
Refer to page 9.48 or 9.50.
Replace dash panel.
If circuit tests OK
Stop vehicle and idle engine
for five (5) minutes to allow
hydraulic oil to cool.
Not OK
Dual Hydraulic Oil
Temperature
Warning Indicator
MU4300
Not
OK
Not
OK
Before troubleshooting any
electrical circuit, ALWAYS begin
by checking the following:
1. Fuses.
2. Battery for proper charge.
3. All connections relating to
circuit are clean and tight.
4. All grounding straps are intact
and securely fastened, refer to
Section 9.1.12, “General
Overview (Vehicle Ground
Strap Locations).”
5. Check dash panel bulbs for
proper function.