MAINTENANCE 4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH FILTER SERVICE Replace filter elements of the hydraulic oil pressure filters NOTICE When a fault message "Pressure Filter restricted" is dis- played, stop work and replace element of the corresponding pressure filter. Legend for illust. Z 22515 (Rr.1) Control and filter panel of rear power unit, engine 1 (Fr.2) Control and filter panel of front power unit, engine 2 (1) Change over valve for operation mode of pump control sys- tem for rear power unit, engine 1. (2) Change over valve for operation mode of pump control sys- tem for front power unit, engine 2.
(3) Pressure oil filter for fan drive hydraulic motor of coolant radi- ator for rear engine "1". Filter restriction monitored by differ- ential pressure switch B21-1. (4) Pressure oil filter for pump distributor gear PTO "1" lubricating oil. Filter restriction monitored by differential pressure switch B27-1. (5) Pressure oil filter for fan drive motor of hydraulic oil cooler "1". Filter restriction monitored by differential pressure switch B28-1. (6) Pressure oil filter for pilot- and pump control oil circuit. Filter restriction monitored by differential pressure switch B22. (7) Pressure oil filter for fan drive hydraulic motor of coolant radi- ator for front engine "2".
Filter restriction monitored by differ- ential pressure switch B21-2. (8) Pressure oil filter for pump distributor gear PTO "2" lubricating oil. Filter restriction monitored by differential pressure switch B27-2. (9) Pressure oil filter for fan drive motor of hydraulic oil cooler "2". Filter restriction monitored by differential pressure switch B28-2. 427