Steering Wheel(S) Freewheel(S) To One/Both Direction(S) - Dometic HC4645H Troubleshooting Manual

EN
4.6 Steering wheel(s) freewheel(s) to
one/both direction(s)
Causes
A. Air in the system (most common cause). Refer to the "quick reference
turns" tables on page 17 and page 18 to confirm lock to lock turns.
B. Dirt or debris in helm pump valves.
C. Internal bypass in steering cylinder and/or autopilot pump.
Solutions
A. Confirm that system is full of fluid and bled free of air. Refer to
installation and operating manual for filling and purging procedures.
B. Check fluid condition for signs of milky, dirty or contaminated fluid.
Flush system as noted on page 21.
C. Conduct the cylinder/helm pump test on page 20.
CAUTION!
A system that is not responding must be diagnosed and corrected
prior to use.
WARNING!
Dometic does not recommend the disassembly of any helm pump.
Contact an Authorized Service Center, or, replace helm pump.
NOTICE!
On multiple helm applications, there is a possibility to enter a slow
freewheel situation if 1–helm is turned 1–direction and then the opposite
helm is slowly turned the opposite direction. This is normal and can be
stopped by performing a quick, partial turn of the wheel to fully close a
hydraulic valve.
11