SERVICE MANUAL NUMBER 28
COMPACT HYDRAULIC STEERING
Hydraulic Fluid Level
Setting Fluid Level
WARNING
Avoid serious bodily injury or death due to loss of steering control. This system op-
erates with an unbalanced steering cylinder volume. Proper fluid level in the helm
can only be set or checked with the cylinder rod fully retracted. Do not set or check
hydraulic fluid level in helm with cylinder rod extended.
System must be filled and purged as outlined previously before setting fluid level.
1.
2.
Ensure cylinder rod is fully retracted.
With filler tube screwed into helm filler plug hole, fill tube approximately 1/2 full of air free
fluid.
3.
4.
Open Starboard bleeder valve and slowly turn steering wheel CLOCKWISE until fluid
level in filler tube is at the top of the plastic filler fitting. Continue turning steering wheel
CLOCKWISE 1/4 turn more and stop. Close bleeder.
Remove filler tube. Fluid level should be at bottom of filler hole. Install vent/fill plug.
Maintaining Fluid Level
To maintain proper fluid level, observe the following:
•
•
Do not allow fluid level to drop more than 1/4 in. (6 mm) below bottom of filler hole.
Check fluid level periodically.
System Check
The system must be checked for proper connections, possible leaks and complete purging
of air after filling, purging and setting the fluid level.
IMPORTANT: In the following, turn the wheel with enough force to exceed the pres-
sure relief valve in the helm. This should not harm the helm or the system.
1.
2.
3.
4.
Turn steering wheel (any wheel on multi-steering station) very hard to port to pressurize
system.
While pressure is maintained, check all port fittings and hose connections. Ensure there
are no leaks. If leaks are present, correct before using.
Turn steering wheel (any wheel on multi-steering station) very hard to starboard to pres-
surize system.
While pressure is maintained, check all starboard fittings and hose connections. Ensure
there are no leaks. If leaks are present, correct before using.
NOTE: Observing a significant drop in the fluid level at the helm while performing the system
check may mean you are compressing air and further filling and purging would be required.
5.
If no leaks are present, the system is ready for service.
WARNING
Avoid serious bodily injury or death due to loss of steering control.Hydraulic pump
in helm requires hydraulic fluid to create the necessary pressure for steering the
boat. Do not operate boat with a steering system fluid leak which could cause insuf-
ficient hydraulic pump pressure and loss of steering control.
INDEX
90-863160 MAY 2000
Page 6B-11
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | MerCruiser Sterndrives 90-863160 |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 3 out of 3)
Marine readers have rated Mercury MerCruiser Bravo Outdrives Sterndrives Marine Engines Service Manual Number 28 3.0 out of 3.0 based on 1 product reviews. I could not find any mention of the seawater pump assembly.
Maybe I have the wrong unit