How To Use This Manual; Common Terms And Definitions - Dometic HC4645H Troubleshooting Manual

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2 How to use this manual

Each fault will be labeled as a "Symptom" at the top of the page, followed
by possible "Causes", and then followed by possible "Solutions".
• Symptom = Problem reported
• Causes = Most likely cause that can lead to the symptom
• Reasons/Solutions = Cures for the symptoms
In cases where there are multiple "causes" a series of checks and tests will
be required. Go through these checks/tests in the order that they appear.
Doing so will quickly narrow in on specific areas. Skipping steps will only
lead to more time diagnosing the problem.
3 Common terms and
definitions
Helm Pump – Located at all steering locations. The steering wheel is
mounted to the helm pump.
Steering cylinder – Mounted to engine(s), rudder(s) and/or outdrive(s).
Manual System – Consists of helm(s), steering cylinder(s) and hoses only.
Power Assist – Electrically driven power pump plumbed into a manual system.
Balanced System – A steering cylinder that the piston rod goes in and
out of both sides of the barrel.
Unbalanced System – A steering cylinder that the piston rod only goes in
and out of one side of the barrel. NOTE: Cannot be used with a Pro helm.
Autopilot Pump (A/P Pump) – External pump plumbed into the steering
system and used in conjunction with an autopilot controller.
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