Volvo D4, Operator'S Manual

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Steering
The DPH/R drive is equipped with a fully hydraulic steering system with additional power assistance to allow
steering without the engine running.
Checking oil level, steering system
IMPORTANT! Follow the directions below to
ensure problem free and safe steering:
Check the steering system oil level every two weeks
so that any changes in level are discovered. Check
oil level at the helm pump. Min level is 12 mm below
lower edge of the fill hole. If the boat has a flybridge,
do NOT open lower helm pump. Only check the oil
level at the upper helm station. Normally, the oil level
will not change, ”oil consumption” in one year is neg-
ligible.
A drop in level is a probable indication that there is a
leak or that there are air in the system. The leak must
be located and rectified immediately.
Contact your
Volvo Penta service centre for repair.
The steering system is filled with ATF and does not
normally require changing. As long as the fluid is red
in colour and does not contain any visible contami-
nants, it need not be changed. If the fluid has started
to turn black or if there are any visible contaminants,
it must be changed. The fluid must also be purged
from air if the steering system has been opened for
service.
WARNING! Use only Volvo Penta recommen-
ded fluid and grade. Never top up the steering
system with fluid of unknown grade. Never use
brake fluid or hydraulic oil.
Any non-appproved
fluid may cause irreparable damage, loss of
steering and cancellation of warranty.
The
incorrect fluid can also result in damage to the
12 mm
(1/2")