Trim Pump Bench Bleeding?

lintmann

Cadet
Joined
Apr 26, 2023
Messages
18
This is a 99 vintage Alpha 1, Gen 2 drive... I somehow got water in my trim system so now I've resealed the trim cylinders, blew out the hoses, removed the trim motor/pump assy to remove and clean out the reservoir, screens and pump assy. I've reassembled the motor/pump/reservoir and filled with 10W-30 in hopes of bench checking it before reinstalling it in the boat.

The motor sounds normal but I'm not getting any real flow from the up or down fittings/ports. Each port spits pretty good like it's trying to move fluid but I'm thinking that it should fire out a pretty strong and steady stream which it definitely is not. It's sort of like it's sucking in air but it's such a basic system from the pickup screens to output ports that I can't see how this could be the cause.

Thoughts and advice are appreciated while I still have some hair left.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
52,561
do you have the reservoir installed? and filled?

the oildyne 108 is a very very simple pump.

however if water sat in the pump for a long period of time, the check valves could have rusted. the pump can be pulled apart and rebuilt if needed. I see that the cost has skyrocketed in the last 15 months
 
Top