(44) 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. (45) TRANSMISSION MAIN FILTER The Transmission Main Filter warning light alerts the operator that oil passing through the filter elements is being restricted. The transmission electronic control system monitors the data supplied by the transmission filter differential pressure switch. When filter restriction is detected, transmission operation is limited to 1st , N eutral, or R everse ranges, until the restriction is eliminated.
Cold transmission oil will produce a temporary oil restriction, but normal transmis- sion operation will be restored as oil temperature rises to an acceptable operating temperature. If normal transmission operation is not restored as oil temperature rises, then transmission filter elements are likely clogged and service is required. (46) ENGINE OIL PRESSURE The Engine Oil Pressure Warning light will come "On" indicating engine 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 immedi- ately and call maintenance personnel to correct problem.
Serious damage may result to engine if operated without sufficient lubricating oil pressure. (47) 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. Occasionally, 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. HB5-12 Instruments and Controls HB5014 4/94