OM3017.3 Operation - Section 3 Instrument Panel and Indicator Lights Page 3-27 (47, Figure 3-8) HIGH COOLANT TEMPERATURE – (Not Used With "Engine Saver" or "DDEC" Electronic Engine Controls) (50, Figure 3-8) LOW OIL LEVEL (OPTIONAL) This light indicates engine oil level is below recom- mended safe level. Serious damage to engine may result. Shut down engine and notify maintenance per- sonnel. This warning light will flash on and off when the engine cooling system temperature is higher than recom- mended. The alarm horn will also sound. Continued operation could cause engine damage.
(51, Figure 3-8) Used Only With Electronic Engine Controls If the high coolant temperature warning light glows, bring truck to a safe stop out of the way of traffic as soon as possible. Move Selector Switch to "Neutral" and run engine at 1500 RPM until light goes out or for about three minutes. If light does not go out, shut engine down and call mainte- nance personnel to correct problem. ENGINE MONITOR – ("Flight / Engine Saver" Option) ENGINE MONITOR MAIN – ("DDEC") The RED engine monitor warning light will illuminate and an alarm horn will sound if a serious engine mal- function is detected by the electronic control system. Electric propulsion to the wheelmotors will be dis- continued .
Dynamic Retarding will still be available to slow or stop the truck. NOTE: Warning indicator lights 47, 48, and 49 will illuminate with the "Lamp Test Switch", but are NOT used with the "DDEC" Electronic Engine Controls. Warning indicator lights 47 and 49 are NOT used with the "Engine Saver" engine option. These functions are monitored by the electronic control systems, but OTHER Red indicator lights will be illuminated if a malfunction is detected by the systems . For DDEC ONLY, the maximum engine speed will be reduced to 1675 RPM . Stop the truck as quickly and safely as possible. Apply parking brake. SHUT DOWN THE ENGINE IMMEDIATELY .
Additional en- gine damage is likely to occur if operation is continued. (48, Figure 3-8) LOW COOLANT LEVEL (Not Used With "DDEC" Electronic Engine Controls) The low coolant level warning light will flash on and off indicating insufficient engine coolant level. The warn- ing horn will also sound. Stop the truck immediately as serious damage could result to engine and cooling system components. Notify maintenance personnel. (52, Figure 3-8) CRANKCASE PRESSURE WARNING LIGHT (Used Only for DDC ENGINE Without DDEC Controls) The engine crankcase pressure warning light indicates high engine crankcase pressure when flashing. The flashing warning light will be accompanied by the alarm horn.
If this light flashes during engine operation, stop the truck. Shut down the engine and alert maintenance personnel. (49, Figure 3-8) LOW OIL PESSURE – (Not Used With "Engine Saver" or "DDEC" Electronic Engine Controls) The engine oil pressure warning light, when flashing, indicates the engine oil pressure is below normal op- erating range. The alarm horn will also sound when the light flashes. Shut down engine and notify maintenance personnel. (53, Figure 3-8) LOW BRAKE PRESSURE This light indicates a malfunction within the hydraulic brake circuit. If this light comes on and buzzer sounds, stop the truck as quickly as possible in a safe area and immediately notify maintenance personnel.
Shut down engine immediately if the low oil pres- sure warning light comes on. Serious damage may result to engine and engine lubricating system components.