Mohawk help

[rburke65]

Bought and installed an older Mohawk Sys 1 9000# lift. Through the process of bleeding the lines of air and such, running the pump, I now have the master side carriage about 10" off the floor when the slave side is resting on the floor. This is a single equalizing line system....only one hydraulic tube runs between the posts. Any thoughts, suggestions, or fixes will be appreciated. Thanks in advance.

 

[avc8130]

Bought and installed an older Sys 1 9000# lift. Through the process of bleeding the lines of air and such, running the pump, I now have the master side carriage about 10" off the floor when the slave side is resting on the floor. This is a single equalizing line system....only one hydraulic tube runs between the posts. Any thoughts, suggestions, or fixes will be appreciated. Thanks in advance.

Are you SURE you have bled the air? Is your reservoir full of fluid?

The local Mohawk distributor warned me that the single line was a bear to get bled and synchronized.

What happens if you keep raising? Does the off side ever go "up"?

ac

 

[rburke65]

Am I sure I have bleed the air? No I'm not. Do i loosen the overhead fitting? I assume that is where the air would rise....to the high side. Do ineed to 'top off' the tank....seems to have plenty of ATF in it...? And yes the "off" side functions perfectly. Since I bought it "used" I didn't receive and haven't seen any bleed instructions online. Thanks.

 

[avc8130]

Am I sure I have bleed the air? No I'm not. Do i loosen the overhead fitting? I assume that is where the air would rise....to the high side. Do ineed to 'top off' the tank....seems to have plenty of ATF in it...? And yes the "off" side functions perfectly. Since I bought it "used" I didn't receive and haven't seen any bleed instructions online. Thanks.

Hmm...have you tried calling Mohawk? Seriously. When I was shopping for a used lift, I called Mohawk and I was SHOCKED with how awesome and helpful they are. Have your serial number ready when you call.

ac

 

[kenners]

http://www.mohawklifts.com/ops/products.php

Not sure if this would be any help, but there are a lot of manuals on this site.

My System 1 10K has a relief valve. When raising and pump side rises faster than right side, pull valve and right side catches up with pump side. Not sure if your System 1 would have that valve.

 

[rburke65]

I don't think that it does. Thanks.

 

[avc8130]

http://www.mohawklifts.com/ops/products.php

Not sure if this would be any help, but there are a lot of manuals on this site.

My System 1 10K has a relief valve. When raising and pump side rises faster than right side, pull valve and right side catches up with pump side. Not sure if your System 1 would have that valve.

What you have is a DIVERTER valve. That is not the same as a "relief" valve.

The new System 1 (the 1A's) have 2 lines over top with a "bleeder" valve on the off-side post. To bleed this system you just hold the button on the lift for 2 minutes AFTER both sides reach the top. It is a horrific sound, but it works magic.

I haven't seen a 1 line system, so I'm not sure exactly how to bleed or how they are synched. I imagine the fluid flows from the top side of the near side cylinder to the bottom of the far side cylinder during lift. Is that true?

ac

 

[rburke65]

Well I just went through all the SYS-1 manuals, and I dont see a 2 post lift manual with a single hydraulic line. I did discover tonight that I am very low on ATF fluid......dah...... so I will correct that tomorrow. Thanks for the manual list.

 

[avc8130]

Well I just went through all the SYS-1 manuals, and I dont see a 2 post lift manual with a single hydraulic line. I did discover tonight that I am very low on ATF fluid......dah...... so I will correct that tomorrow. Thanks for the manual list.

I asked you that in my first response. You claimed there was plenty in the reservoir.

If you don't keep the reservoir topped up you will NEVER get it bled.

You have to realize that with only 1 overhead line, as the lift goes up fluid is transferred from the reservoir to the cylinders. If you don't start with sufficient fluid in the reservoir it will be very easy for the pump to draw in air and completely destroy all of the bleeding work you have done.

On MY lift the proper fill height is 1/2" below the fill neck. I chose to over do it a bit and have just been letting the excess weep out into a bucket under the reservoir while the system finds its own "happy" level.

Did you CALL Mohawk? They WILL help you.

I have searched high and wide trying to help you out of the goodness of my internet heart. Your lift is 20+ years old at this point, I don't think the internet existed when it was popular so information is scarce at best.

ac

 

[rburke65]

avc8130.....yes you did ask about the fluid level...and I was so wrong. And yes again you have been most helpful. I also have not found any thing on the Internet about the 'one line' units. I will call Mohawk again, and like you have said they are indeed very helpful. Thanks..enjoy the holiday.

 

[avc8130]

avc8130.....yes you did ask about the fluid level...and I was so wrong. And yes again you have been most helpful. I also have not found any thing on the Internet about the 'one line' units. I will call Mohawk again, and like you have said they are indeed very helpful. Thanks..enjoy the holiday.

I've been using my System 1A all day today working on trans cooler lines on my diesel truck. I have probably had my truck up/down a dozen times today. My lift is ~ 1/2 lock out of sync right now. Next time the truck is off I will bring the lift all the way up and hold the button to run the bleeder valve a bit.

Please share when you get the lift working. I am really curious how the 1 overhead line works.

ac

 

[rburke65]

I will do that. Just went out and bought ATF to top the tank off.....thanks again.

 

[avc8130]

I will do that. Just went out and bought ATF to top the tank off.....thanks again.

The auto parts store looked at me funny when I said "I'll take 4 quarts of your cheapest ATF please."

ac

 

[Wheelgun1]

You have a single overhead line correct?

The way to bleed it to my understanding is you need to find a fitting that will thread into your slave side rams bleeder screw, (which should be 3/4 fine threads) preferably a barbed style that you can connect a long piece of clear tubing to, which you will then run to the the fill opening in the reservoir, you will then cycle the lift a few times. It's basically the same as bench bleeding a master cylinder but you need to have the reservoir filled to just below the fill opening so the tubing doesnt have a chance to **** air back in. When you have no more bubbles your done.

 

[avc8130]

You have a single overhead line correct?

The way to bleed it to my understanding is you need to find a fitting that will thread into your slave side rams bleeder screw, (which should be 3/4 fine threads) preferably a barbed style that you can connect a long piece of clear tubing to, which you will then run to the the fill opening in the reservoir, you will then cycle the lift a few times. It's basically the same as bench bleeding a master cylinder but you need to have the reservoir filled to just below the fill opening so the tubing doesnt have a chance to **** air back in. When you have no more bubbles your done.

There we go! Savior!

ac

 

[rburke65]

Thanks Wheelgun1.....I will see what I can come up with.

 

[rburke65]

Well, I'm back with the good news that i did get my Mohawk SYS. 1 lift functioning as it should. First of all I have to give a big 'Thank you' to 'avc8130' and to 'wheelgin1' for their help, as well as my buddy Ray G. and to Mohawk staff for their help. My mistake was not taking a logical, 'step by step' sequence to get the system bled and the lift operating. I got anxious, and inpatient. I did not check the ATF level in the tank.....I assumed and we know what happens when you do that! Then I discovered an air bleed port on the upper end of the "off" side cylinder....this helped greatly! And I got some help from Mohawk but they Left out one of the steps in the instructions and that caused me more grief! But after it was all said and done, the topping off of the ATF tank, and the discovery of the "bleeder" was key. Thanks everyone!