OPERATION 3.7 ELECTRICAL EQUIPMENT IN CAB BASE Preheating System for Oil, Coolant and Batteries (continued) Engine Coolant and Engine Oil Heatings Legend for illustration Z 21724 (1) Coolant heating systems, installed on RH and LH side member of the main frame. (2) Switch, coolant heater ON/OFF. (3) Indicator light, coolant heating ON, (16) Coolant hoses, preheated coolant to the engine. (17) Coolant hose, preheated coolant to the engine. (18) Coolant hose, preheated coolant to the engine.
(19) Coolant hose from engine to coolant heater (20) Coolant hose from engine to coolant heater (A) Coolant inlet (B) Coolant outlet (G) Engine oil heaters installed in the engine oil pan (H) Thermostats for engine oil heaters installed in the engine oil pan To activate the coolant heating, set main switch (1Q1) on the switch board in cab base to ON position. The coolant heating can then be switched on with switch (2) on the control panel. The lamp (3) illuminates with coolant heating ON. REMARK For more information about the coolant heating system, refer to the manufacturer’s manual "Coolant Heating System" delivered with the heating system. 201