System ID ??

[moparlvr4406]

how is the best way to determine is my tab sysem is a Bennett.
all of the components LOOK similar to the ones in the videos
but it has a 4 button switch..up/down for each side.
my tabs are locked in a neutral position and when the buttons are actuated a click or clunk is heard from the motor unit.
I have not really dug into the problem as yet since the boat is functional with them in the position they are in.
any tags or numbers I should look for ?? and any tips for troubleshooting
my first instinct is that the pump motor is siezed.
this is on my 78 SRV240.
thanks
Jim

 

[Southpaw II]

Go to the Bennett website and look at the pump they use. It's pretty much the same for all of their models. Yours should be mounted on the transom with a black tube running to both of the tabs. You will recognize it from the website...should have a smoked colored plastic top on it being held on by a single screw.

Don

 

[moparlvr4406]

Go to the Bennett website and look at the pump they use. It's pretty much the same for all of their models. Yours should be mounted on the transom with a black tube running to both of the tabs. You will recognize it from the website...should have a smoked colored plastic top on it being held on by a single screw.

Don

that is exactly what mine looks like thankyou :thumbsup:
now to figure out why it doesnt work
the videos are great BTW

 

[skibum]

Jim,

Check out this thread...

 

[Tabman]

Jim,

Below you will find troubleshooting for your system. Step 3 is a good place to start and since yours is an older system take a look at step 6 to see if there is a relay in the wiring harness back by the pump.

Here is a link to a video that covers how the system works and basic troubleshooting http://www.bennetttrimtabs.com/videoplayer.php?vID=10

And here is a link to a video that covers the Trim Tabs not moving and no sound of the pump running http://www.bennetttrimtabs.com/videoplayer.php?vID=13

Once you look over the videos and troubleshooting let me know what you find and I will be delighted to help get the system operating again.

Tom McGow
Bennett Marine

Fluid: Automatic Transmission Fluid (ATF) any type. Hydraulic Power Unit is self bleeding, running the Trim Tabs up and down 3-4 times will purge air from the system.

Fuse: 12 volt system use 20 amp in-line fuse on positive. (24v & 32v use proportionately smaller)

Red= Port Valve
Green= Starboard Valve
Blue=Motor Forward (pump pressure)
Yellow= Motor Reverse (pump retract)
Black on HPU=Ground
Orange on Helm=Control Positive

Troubleshooting

1.If one side is not operating reverse hydraulic lines on the front of the Hydraulic Power Unit to determine if the malfunction is in HPU or actuator / hydraulic lines. If after reversing the lines symptom shifts to the other side the malfunction may exist in HPU. If the symptom remains on the same side, malfunction may exist with the actuator / hydraulic lines

2. Is the unit receiving a solid 12 volts? Low voltage will some times cause the solenoids to not open preventing the tabs from moving even though the pump motor is running.

3. Conduct the following test:
Remove the wires from the 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 trim tabs function correctly for each wire grouping then the switch is at fault. Also note that any loose or missing screws on the back of the switch (whether a wire is connected there or not) can cause the pump to malfunction.

This test may also be done right at the pump by substituting a "hot lead" for orange. There is usually a connector to the wire harness within a foot or so of the pump. You want to check this connection for corrosion. You may wish to cut the connector off on the pump side and try the test on bare wires.

4. If you suspect corrosion on the wire connector near the pump, cut it out, test as above and reconnect using butt splices.

5. If you conclude the problem is in the pump, contact me. Bennett Trim Tab Systems carry a five year warranty.

6. Check to see if there is a relay in line on the wiring harness near the hydraulic power unit. If there is it is an Interrupter Relay (IR1000). It prevents the system fuse from blowing if you try to actuate one trim tab up and the other down at the same time. After you test as outlined above, try removing the relay from the wiring harness and retest the unit. If it works the IR1000 will need to be replaced. Note: The IR1000 relay is no longer used in current Bennett Trim Tab systems and has been replaced with Lock Out Rocker Switches.

 

[moparlvr4406]

printing out now
will check in the next few days and let ya know what I find
Thanks guys