OPERATION 3.18 CENTRAL REFILLING SYSTEM Legend for illustration Z 22469 263 17 Engine oil evacuation and filling adapters of the reserve tanks for Front engine (Fr.) and Rear engine (Rr.). Observe the corresponding indicator lamp (9) and (10). (Fr.) Front engine, (Rr.) Rear engine. Radiator coolant draining and filling adapter. Monitor coolant level at radi- ator filler neck. NOTICE The two-loop type cooling system of each engine is equipped with two radiators. One radiator for the engine crankcase and cylinder heads and one radia- tor for the low temperature aftercooler (LTA) system. The radiators are connected with a pipe on the bot- tom side.
This pipe contains a check valve which allows coolant flow from rear radiator to the front LTA radiator only. For draining the coolant from the front mounted LTA radiator, it is necessary to open the shut-off cock in the draining/filling hose line just below the radiators. Refer to the engine Operation and Maintenance Manual in part 3 of this binder for the maintenance instructions of the cooling system. CAUTION Be sure to close the shut-off cock on the bottom side of the radiators as soon as the maintenance of the cooling system is finished. Adapter for evacuation and filling of the main hydraulic oil reservoir.
After the oil is completely evacuated, drain the oil from suction oil reservoir, collector pipe and back- pressure valve pipe. Refer to maintenance section, item hydraulic oil change for draining procedure. Open the shut-off valve between main oil reservoir and suction oil reservoir. Fill the hydraulic reservoir and observe indicator lamp (11). 18 19 CAUTION