OM3005.3 7/96 Operation - Section 3 Instrument Panel and Controls Page 3-21 (38) Coolant Temperature Light (41) Engine Oil Pressure This warning light indicates the engine coolant temperature has exceeded 200 o F (93 o C). 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. Move transmission range selector to Neutral, shut engine down, apply parking brake and call maintenance personnel to correct problem. 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. (39) 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. (42) 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. (40) 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 , N eutral, or R everse ranges, until the restriction is eliminated.
(43) Brake Oil Temperature The Brake Oil Temperature Warning light will turn "On", if the brake oil temperature exceeds 250 o F (121 o C). 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. 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 cools to below 250 o F (121 o C). If temperature does not return to this range within a few minutes, report the condition immediately to maintenance person- nel and wait for further instructions before moving truck.