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OM3012.3
Instrument Panel and Controls
(34) Coolant Temperature Light
This warning light indicates the
engine coolant temperature has
exceeded 200
If light comes On, bring truck to a safe stop as soon
as possible out of way of traffic. Move transmission
range selector to Neutral, shut engine down, apply
parking brake and call maintenance personnel to
correct problem.
(35) Coolant Level
This light indicates the coolant level
in the radiator is low. If light comes
On, bring truck to a safe stop as
soon as possible out of way of traffic
and call maintenance personnel to
correct problem. Have coolant level
checked.
(36) Transmission Main Filter
The Transmission Main Filter warn-
ing light alerts the operator that oil
passing through the filter elements
is being restricted. The transmis-
sion electronic control system
monitors the data supplied by the
transmission filter differential pres-
sure switch. When filter restriction is detected, trans-
mission operation is limited to 1st, Neutral, or Reverse
ranges, until the restriction is eliminated.
Cold transmission oil will produce a temporary oil
restriction, but normal transmission operation will be
restored as oil temperature rises to an acceptable
operating temperature. If normal transmission opera-
tion is not restored as oil temperature rises, then trans-
mission filter elements are likely clogged and service is
required.
o
o
F (93
C).
(37) Engine Oil Pressure
The Engine Oil Pressure Warning
light will come "On" indicating en-
gine oil pressure is below normal
operating range.
If light comes On, bring truck to a safe stop as soon
as possible out of way of traffic. Shut engine down
immediately and call maintenance personnel to
correct problem. Serious damage may result to
engine if operated without sufficient lubricating oil
pressure.
(38) Hydraulic Oil Filter
The Hydraulic Oil Filter warning light
indicates that the oil passing
through the filter elements is being
restricted. Due to cold oil, the light
may come on at startup and remain
lit until the hydraulic oil is warm. Oc-
casionally, during operation the light
may flicker on and off; but when the light comes on and
remains on, the filters should be changed as soon as
possible.
(39) Brake Oil Temperature
The Brake Oil Temperature Warning
light will turn "On", if the brake oil
temperature exceeds:
o
250
F (121
As quickly as safety will permit, bring the truck to
a complete stop away from traffic, move transmis-
sion range selector to "Neutral", apply the parking
brake, and run engine at high idle. Continue to run
engine at high idle until Brake Oil Temperature
Warning light turns off and brake oil temperature
o
cools to below 250
F (121
If temperature does not return to this range within
a few minutes, report the condition immediately to
maintenance personnel and wait for further in-
structions before moving truck.
Operation - Section 3
Page 3-23
o
C).
o
C).
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