(40) BRAKE LOCK The Brake Lock light is on only when the brake lock switch has been activated 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. (41) 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 decreasing and is below 2000 psi (13.8 MPa). If this light comes "On" when the brake pedal is de- pressed 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 automatically be fully applied to stop the truck. (42) 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. (43) COOLANT TEMPERATURE LIGHT This warning light indicates the engine coolant temperature has exceeded 200 o F (93 o C). 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 prob- lem. HB5014 4/94 Instruments and Controls HB5-11