Trim tabs are stuck in the up postion?

mmuutts

Seaman
Joined
Apr 13, 2011
Messages
62
Bennett trim tabs, #V 351

Unit has power, sounds alright when I push the tab buttons. Fluid level is correct. They just do not move. any help would be awesome!

Thanks
 

Bifflefan

Commander
Joined
May 27, 2009
Messages
2,933
Re: Trim tabs are stuck in the up postion?

Mine did that after they sat for a winter once.
I just leaned on them until they broke loose and they work fine. There is a big spring inside them your pushing against the hydro, just the spring.
 

mmuutts

Seaman
Joined
Apr 13, 2011
Messages
62
Re: Trim tabs are stuck in the up postion?

Thanks, I'll give that a try....
 

Boatist

Rear Admiral
Joined
Apr 22, 2002
Messages
4,552
Re: Trim tabs are stuck in the up postion?

The first thing I would do is make sure your battery is fully charged as they can be voltage sensitive.

Try just putting one side down at a time.
Also try to raise them, Mine sound different when raising and the are all the way up. I will try to post some Trouble shooting from Benett and some of their contact information.

From Bennett
2. If HPU runs but trim tabs do not move -
- Inspect for disconnected or corroded red and green valve wire connections at helm control and quick-disconnect plug.
- The following test can be used to help isolate the malfunction.

Remove wires from helm control and touch together as follows:

Operation Reaction
Orange (+), blue, red Port trim tab down
Orange (+), blue, green Starboard trim tab down
Orange (+), blue, red, green Both trim tabs down
Orange (+), yellow, red Port trim tab up
Orange (+), yellow, green Starboard trim tab up
Orange (+), yellow, red, green Both trim tabs up

- If the tabs function properly in each of the above combinations, check the helm control. If during this test the trim tabs continue to malfunction, inspect the HPU.

3. If one trim tab operates and the other does not -
- Inspect for disconnected or corroded red or green valve wire connections at helm control and quick disconnect plug. (Red wire operates port trim tab; green wire operates starboard trim tab.)
- Reverse the hydraulic tubing at front of HPU to determine if malfunction is in HPU or actuator / hydraulic connections. If ,after reversing lines, the symptom shifts to other trim tab, a malfunction may exist in HPU. If the symptom remains on the same side, a malfunction may exist with the actuator / hydraulic connections.

For additional assistance contact Bennett Marine's Client Services Department at (954) 427-1400 or e-mail trimtabs@earthlink.net.

Tom McGow from Bennett will probably see this give you more help.
 

mmuutts

Seaman
Joined
Apr 13, 2011
Messages
62
Re: Trim tabs are stuck in the up postion?

OK..So I tried the above...touching wires together and still no movement....What do inspect when you inspect the HPU? Thanks again!
 

Tabman

iboats.com Partner
Joined
Feb 21, 2002
Messages
566
Re: Trim tabs are stuck in the up postion?

mmutts,

How old is the system? Was it working before?

Make sure that both ends of the black ground wire at the pump are clean and making good connection, as this is frequently a source of low voltage.

Do you hear the pump run with all the wire combinations?

Let me know and I will be delighted to help you get them functioning correctly.
 

mmuutts

Seaman
Joined
Apr 13, 2011
Messages
62
Re: Trim tabs are stuck in the up postion?

Not sure how old the system is....I will check/clean the black ground wire on the pump. I will dbl check the wire combos again and let you know.

thanks, Tabman
 
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