Sandra Lee II
06-27-2008, 09:01 PM
I repaired a leak in my oil line from the pump to the out drive. The repair is holding good. My problem is now I believe I have air in the lines. Does any body know how to bleed the air out of the system?? I have a Merc Cruise Alpha I out drive.
bottom scratcher
06-27-2008, 09:28 PM
This is the procedure for the Oildyne pump with the plastic reservoir.
Air Bleeding Power Trim System
The Power Trim System will purge itself of a small
amount of air by raising and lowering the drive unit
several times. However, if a rebuilt trim cylinder is
being installed (which has not been filled with oil), the
following bleeding procedure should be used to
remove the air from the system.
Bleeding OUT/UP Trim Circuit
1. Fill pump reservoir to proper level as explained
preceding. (Trim cylinder must be compressed.)
2. Disconnect OUT/UP hose from front connection
on trim cylinder. If both cylinders were rebuilt, disconnect
hoses from both cylinders.
3. Direct end of trim hose(s) into a container.
4. Run trim pump in the UP direction until a solid, airfree
stream of fluid is expelled from hose(s). Reconnect
hose(s) and tighten securely.
5. Refill trim pump to proper level.
Bleeding IN/DOWN Trim Circuit
1. Ensure pump reservoir is filled to proper level.
2. Disconnect IN/DOWN hose from rear connection
on gimbal housing hydraulic connector. If both
cylinders were rebuilt, disconnect hoses from
both sides of hydraulic connector.
3. Plug holes in hydraulic connector, using plug
(22-38609) or suitable device.
4. Direct end of trim hose(s) into container.
5. Run trim pump in the UP direction until trim
cylinders are fully extended.
6. Remove plug(s) from gimbal housing hydraulic
connector and momentarily run trim pump in the
IN/DOWN direction until a solid, air-free stream
of fluid is expelled from rear hole(s) in hydraulic
connector. Reconnect trim hose(s) and tighten
securely.
7. Lower drive unit to the full IN/DOWN position and
refill trim pump to proper level. Run trim system
IN/DOWN and OUT/UP several times and recheck
fluid level.