Volvo Penta D4 Operator's Manual page 96

Maintenance: Steering
94
Checking oil level, servo pump
The oil recovery tank is a see-through reservoir, check
oil level without opening the reservoir. Oil should be
right below the neck of the recovery tank.
If oil needs to be added, first disconnect quick connect
coupling, before opening the cap.
Hydraulic hoses. Checking
Carefully check the steering system's hydraulic hoses
for wear and cracks. Check external hoses especially
carefully, as these have been exposed to water fa-
tigue. Hoses must be replaced if at all damaged.
WARNING! A leaking hydraulic hose can nega-
tively affect steering, and at worst steering can
be lost altogether. Cleanliness is extremely im-
portant, no dirt must get into the hydraulic sys-
tem. Before removing, clean and check carefully
how hoses are routed and connected. Faulty
routing or dirt in the hydraulic system can
negatively affect steering, and at worst steer-
ing can be lost altogether. Please contact your
nearest authorized Volvo Penta workshop for as-
sistance.