15. Main winch gear case drain.
Open access cover (17).
Operate main winch to warm oil to operating temperature. Shut down all systems.
Open hull drain valves (21) and open main winch drain valve. After draining, close main winch drain valve and hull
Refill main winch (see step 7) with oil (see Table 2).
Close access cover (17).
16. Hydraulic reservoir drain.
Open access door (14).
Before draining hydraulic system, warm hydraulic fluid by idling main engine at 675 rpm for 5 minutes with main
hydraulic pump engaged and all hydraulic levers in neutral.
Shut down engine and open hull drain valves. Open hydraulic reservoir drain valve (22). After reservoir is drained,
close hydraulic reservoir drain valve and hull drain valves.
Refill reservoir (see step 17).
Each time hydraulic oil is changed, hydraulic reservoir filter should be serviced (see step 18).
Close access door (14).