Operation - Section 3 OM3012.3 Page 3-22 Instrument Panel and Controls (27) ALT. FAULT Light (30) Emergency Steering This light will illuminate if the alternator output exceeds 30 VDC, or battery voltage is less than 24 VDC, or if voltage for each battery differs more than 0.75 V. The Emergency Steering Light, when actuated, indicates that the steering circuit pressure is decreas- ing and is below 1800 psi (12.4 MPa). (28) EQUAL FAULT Light If the light comes "On", stop the truck immediately and have the system checked. Do not attempt further operation until malfunction is located and corrected.
The charge condition of the two 12 Volt batteries is monitored to make sure that both batteries are being charged equally. The Equal Fault Light will illuminate if more than a 0.85 volt variance between the two batter- ies is detected. (29) CHECK TRANS Light (31) Brake Lock The ATEC system has a controller that monitors vari- ous functions and performances. When the controller senses that the system is not performing properly, the CHECK TRANS light turns "On" to alert the operator that a problem has occurred and that the vehicle should be serviced as soon as possible. The CHECK TRANS light will turn "On" when the ignition is turned "On". After about 2 seconds, the light will go "Off".
This provides both a light bulb check and a system check. The Brake Lock light is on only when the brake lock switch has been ac- tivated by the operator. The light indicates that only the rear brakes have been applied. The brake lock switch is to be used only at the shovel or dump area. In cold weather, when the transmission oil is below -10 o F (-23 o C), the DO NOT SHIFT lights on the range selector and the CHECK TRANS light will stay on after the engine is started. The transmission will stay in NEUTRAL, regardless of which range is selected until the oil is warmer than -10 o F (-23 o C).
When the trans- mission oil warms up, the CHECK TRANS and DO NOT SHIFT lights will turn off and the transmission will operate in first gear or reverse only. At 20 o F (-7 o C), the transmission may be operated safely in all ranges. (32) Low Brake Pressure Warning Light This light indicates a malfunction within the hydraulic brake circuit. The low brake pressure warning light indicates that the hydraulic pressure in the brake system is de- creasing and is below 2000 psi (13.8 MPa). If this light comes "On" when the brake pedal is depressed or comes "On" continuously, 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.When the pressure drops to 1650 psi (11.4 MPa), all brakes will auto- matically be fully applied to stop the truck. If the transmission oil temperature reaches 250 o F (121 o C), the CHECK TRANS indicator light will come "On". The ECU (Electronic Control Unit) will inhibit operation of the truck in higher gears. NOTE: The Transmission Temperature Gauge (8) indi- cates the converter temperature. The ECU senses oil temperature in the sump. The two temperatures may be different .
(33) Parking Brake The Parking Brake light indicates that the parking brake switch has been moved to the "On" position or that the park brake is "On". Do not use the parking brake while loading or dumping. Sump Oil Temperature Do Not Shift Light Check Trans Light Truck Operation -10°F (-24°C) And BELOW ON ON NEUTRAL ONLY -9°F (-23°C) to + 19°F (-7°C) OFF OFF NEUTRAL, 1st (FIRST), & REVERSE Only + 20°F (-6°C) And ABOVE OFF OFF Full Operation In All Ranges