Trim Pump Stalls at end of Travel

D

dg512055

Petty Officer 3rd Class
Joined
Jul 9, 2009
Messages
92
Is it normal for the trim pump motor to nearly stall to a stop when the drive reaches its full up or down position? I thought maybe there should be a relief valve of some kind in the system. My trim system works perfectly in between, but I hate to hear it bog down at the end of travel.
 
Alpheus

Alpheus

Lieutenant Commander
Joined
Aug 3, 2009
Messages
1,757
Re: Trim Pump Stalls at end of Travel

No. You should have a trim limit switch to shut pump off at max up and down travel. It should be overridin when the trailer switch is used...
 
Don S

Don S

Honorary Moderator Emeritus
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Aug 31, 2004
Messages
62,321
Re: Trim Pump Stalls at end of Travel

Is it normal for the trim pump motor to nearly stall to a stop when the drive reaches its full up or down position?
Click to expand...

Yes, it's normal. But you also shouldn't let it set like that. When you get to full up and the pump bogs, then just a brief bump of the down takes the excess pressure off the system, and prevents the relief valves in the pump from jamming if sitting for a while.
 
D

dg512055

Petty Officer 3rd Class
Joined
Jul 9, 2009
Messages
92
Re: Trim Pump Stalls at end of Travel

Thank you for all the input folks. Just to clarify, the trim-up limit switch does stop the up trim. The trailer switch works also and over rides the limit switch. I never thought about letting it sit for long periods with excess pressure on the valves. I will take your advice and relieve the pressure before storage (during the week or overnite).

Thanks
 
Don S

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Trim Pump Stalls at end of Travel

I will take your advice and relieve the pressure before storage (during the week or overnite).
Click to expand...

Get in a habit of relieving the pressure every time you put the drive up. Your VERY EXPENSIVE trim pump will thank you for it.
 
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