Regal 53 SC Owner's Manual page 237

HIGH PRESSURE FILTER SYSTEM
A= FILTER HEAD WITH SWITCH (SWITCH NOT SHOWN)
B= FILTER HOUSING WITH FILTER ELEMENT
Filling Steering Actuator & Trim System Oil & Filter
Under normal conditions the trim and steering actuator
swim system oil and fi lter do not require changing unless
they become contaminated with water or debris.
If the VesselView displays a code like "Filter Dirty Fault"
or "Service Steering Filter" then these items need to be
serviced immediately if possible. See photo on next page.
Contact your closest Cunmins Customer Care.
A
B
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Chapter 5