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Old 08-11-2017, 05:12 PM   #1
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Default Simrad AP44 calibration not turning past halfway

Hi,

I just installed an AP44 VRF Medium pack (RPU80 pump, NAC-2 Computer, Precision 9, etc etc).
I bleeded the helm (I think I did it properly, about 10-15 times each way until no bubbles went up the plastic hose) but I didn't bleed the ram.
Everything shows up on the Device List.
the pump turns the motors in both directions when I run the initial calibration (did the motors turn starboard?, 6 times each time I ran the calibration), then I proceeded to the next step, move the wheel all the way starboard and click next.
here is the problem:
I keep the button pressed while it moves to port but the motors stops halfway even though the pump keeps running until I stop pressing, then it thinks it centers the motor but they are halfway between center and starboard.

Other than bleeding the ram, does anyone have any idea what I am doing wrong?
I have factory reset and global reset the AP44 many times.
it's configured for virtual rudder, clutch, etc etc.

any help is appreciated,

thanks,

Sam
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Old 08-11-2017, 05:17 PM   #2
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It's most probably air in the system. You need to bleed both the ram and the pump as well.
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Old 08-11-2017, 05:18 PM   #3
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yeah, that's my thought too but the storm moved in before I could bleed the ram.

I will try it this weekend. thanks a lot
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Old 08-11-2017, 06:19 PM   #4
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is there a bleeding plug in the RPU-80 or do I have to turn the three hoses and let air out?
any specific order?

thanks,

Sam
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Old 08-12-2017, 04:46 PM   #5
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I did this: Manually turn the wheel in one direction while running the autopilot in manual mode the oposite direction such that the engine stays in almost the same position is the way to get air out of the autopilot pump and hoses. This has to be repeated several times in both directions. I prefer to have a clear hose connected to the wheel pump while doing this. The other end of the hose should be connected to a reservoir filled with hydraulic oil. When there is no more bubbles coming up the clear hose the bleeding of the autopilot system is done. In addition extra bleeding of the steering cylinder is usually also required.
And this: Bleeding hydraulic steering by yourself
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Old 08-12-2017, 05:37 PM   #6
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Thanks Denko, I'll read the manual tonight and try it tomorrow, I still haven't figured out how to turn the AP44 manually in each direction, I am still trying to get past the calibration.

thanks again,

Sam
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Old 08-12-2017, 06:22 PM   #7
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FWIW I didn't use the ap44, I jumpered leads from the local panel to the pump. Don't know if it's the correct way, but it worked for me. Good luck
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Old 08-13-2017, 12:16 AM   #8
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Quote:
Originally Posted by denko View Post
I did this: Manually turn the wheel in one direction while running the autopilot in manual mode the oposite direction such that the engine stays in almost the same position is the way to get air out of the autopilot pump and hoses. This has to be repeated several times in both directions. I prefer to have a clear hose connected to the wheel pump while doing this. The other end of the hose should be connected to a reservoir filled with hydraulic oil. When there is no more bubbles coming up the clear hose the bleeding of the autopilot system is done. In addition extra bleeding of the steering cylinder is usually also required.
And this: Bleeding hydraulic steering by yourself

This procedure looks quite similar to something I previously posted


Quote:
Originally Posted by abbor View Post
Sounds like you still have air in the system.

Manually turn the wheel in one direction while running the autopilot in manual mode the oposite direction such that the engine stays in almost the same position is the way to get air out of the autopilot pump and hoses. This has to be repeated several times in both directions. I prefer to have a clear hose connected to the wheel pump while doing this. The other end of the hose should be connected to a reservoir filled with hydraulic oil. When there is no more bubbles coming up the clear hose the bleeding of the autopilot system is done. In addition extra bleeding of the steering cylinder is usually also required.
Lowrance auto pilot
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Old 08-13-2017, 08:09 AM   #9
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I will give that a try. just when I finished tidying up the wiring...
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Old 08-13-2017, 08:32 PM   #10
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ill be battling myself w the ap in 2weeks
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Old 08-13-2017, 08:39 PM   #11
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How do you run the ap44 in manual mode to bleed the the pump as described by Abbor ?
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Old 08-14-2017, 06:18 AM   #12
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Quote:
Originally Posted by manethon View Post
ill be battling myself w the ap in 2weeks
Ping me when you do and I will give you all the gotchas.
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Old 08-14-2017, 06:19 AM   #13
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Quote:
Originally Posted by Kristo View Post
How do you run the ap44 in manual mode to bleed the the pump as described by Abbor ?
Apparently the only way is to jump the wires to go in one direction and jump them backwards (black to red and red to black) to go in the other direction
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Old 08-14-2017, 07:38 PM   #14
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Quote:
Originally Posted by abbor View Post
This procedure looks quite similar to something I previously posted




Lowrance auto pilot
LOL, sorry I couldn't figure out how to quote from a different tab, but yes I copied and pasted your procedure. And yes it worked just fine!
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Old 08-15-2017, 09:18 AM   #15
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bled the ram and connected the pump directly to the battery, red to red and black to black and then alternated for about 40 minutes inverting the wires to make it go port or starboard with the bottle of fluid connected to the helm and I still have a couple of dead spots, it seems to stop about halfway but if I push it past that spot, it keeps going all the way in both directions, it still stops during calibration.
next step is power bleeding the whole system, I have a guy coming either this afternoon or tomorrow morning and then I will run the calibration again and we'll see how it goes.

"funny" note, I called Navico this morning, the first tech told me to invert the wires at the pump and try again, of course that didn't work so I called again and the next tech told me to "never do that, who told you to do that???", I told him, do you have a guy named Bill in the same room with you? why don't you ask him? silence in the line for like a minute... anyway, still in the same spot, no leaks, can't get any more air out of the system so we'll see what happens today or tomorrow.

thanks to all,

Sam
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Old 08-15-2017, 10:07 AM   #16
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Did you turn the wheel the opposite way the AP tried to turn the engine?

The engine should almost not move at all when doing this.
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Old 08-15-2017, 11:57 AM   #17
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Quote:
Originally Posted by abbor View Post
Did you turn the wheel the opposite way the AP tried to turn the engine?

The engine should almost not move at all when doing this.
Yes, many times, I didn't feel much pressure sometimes and I could even turn it back when that happened.
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Old 08-15-2017, 09:18 PM   #18
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Quote:
Originally Posted by sammythebu11 View Post
Yes, many times, I didn't feel much pressure sometimes and I could even turn it back when that happened.
I had similar experience last night..found hyraulic leak at pump....tightened fittings...k...bled the pump by hot wiring the pump.....then bled cylinders again then bled pump again .....seems to be bled with no sponginess at helm...will test autopilot Friday on trip and attempt some fine tuning
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Old 08-16-2017, 06:28 AM   #19
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To turn the motor, put the AP44 in FU mode (follow up) and use the knob to turn the motor.

You might want to find a shop that has a Seastar power purge bleeding machine. That was the only way I could get mine completely bled.
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Old 08-16-2017, 07:49 AM   #20
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By hot wiring the rpu 80 pump it gives you a very clear indication of what your maximum hard over speed is in both directions
In my case it was 11 seconds with the pump driving the kicker cylinder and the stern drive cylinders hooked in series with the liquid tie bar valve.

If I don't have it bled properly this time......I will be seeking a shop with a power bleeder.
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