Steering Wheel(S) Are Bumpy When Turning Either Direction - Dometic HC4645H Troubleshooting Manual

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4.7 Steering wheel(s) are bumpy
when turning either direction
Causes
A. Air in the system (most common cause).
B. Incorrect steering cylinder installed.
C. Faulty tilt mechanism.
D. Faulty check valves in helm pump.
E. Timing issue with helm pump.
Solutions
A. Confirm system has been bled free of all air. Refer to installation and
operating manual for filling and purging procedures.
B. Consult with selection guide and/or website to ensure proper cylinder
has been installed.
C. Check following:
a. Confirm tilt mechanism has been installed correctly.
b. Check all possible tilt settings.
NOTICE!
If the problem goes away in other tilt settings, replace tilt mechanism.
D. Replace and/or repair helm pump.
E. Replace and/or repair helm pump.
NOTE: A timing issue within a helm pump is very rare. Most timing related
problems are felt immediately after installation and purging.
WARNING!
Dometic does not recommend the disassembly of any helm pump.
Contact an authorized service center, or, replace helm pump.
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