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Old 03-05-2012, 04:25 AM   #1
philgunn OP
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Joined: May 2004
Location: Cork Ireland
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Problem with Motorcycle lift / ATV Lift Large Scissors 680kg

Hi all

I am having ongoing problems with a large motorcycle lift / ATV Lift / Lawnmower Lift

it comes with a handpump - Airmotor attached ,

at the moment the pump seems to be letting go , ie when you hand pump it , the lift falls straight away as if the release lever / down lever is stuck on ,

and the airmotor when the pump is working takes about 3 minutes to lift the lift ,

at the moment i am operation it with a 10 Ton portapower pump , but would like to upggrade the airmotor pump to something better , has any one had this problem

pictures here http://flic.kr/ps/wjHnh

Phil

lift is 1200 mm wide
2000 mm long + Lead up ramp
Max lift is 680kg
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Old 03-05-2012, 07:35 AM   #2
scapegoat
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Man, looks dangerous to both you and any bike on the lift. The pump looks identical to a hydraulic hand pump in a Harbor Freight jack setup my work once had. If the system has a gauge on it Id have a look and consider setting up a air compressor and valve system with a foot pedal if possible to raise and lower the lift. The ram is far smaller the the one on something like my Handy Lift but Id think you could rig something up.
If thats not an option Im guessing your pump has a over pressure release and the spring and or valve are weak or damaged. Once it begins to release air it basically lets go and it drops like a rock. Im guessin this only happens with a bike or large amount of weight on the lift??
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Old 03-05-2012, 08:29 AM   #3
Bump Stop
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Quote:
Originally Posted by philgunn View Post
Hi all

I am having ongoing problems with a large motorcycle lift / ATV Lift / Lawnmower Lift

it comes with a handpump - Airmotor attached ,

at the moment the pump seems to be letting go , ie when you hand pump it , the lift falls straight away as if the release lever / down lever is stuck on ,

and the airmotor when the pump is working takes about 3 minutes to lift the lift ,

at the moment i am operation it with a 10 Ton portapower pump , but would like to upggrade the airmotor pump to something better , has any one had this problem

pictures here http://flic.kr/ps/wjHnh

Phil

lift is 1200 mm wide
2000 mm long + Lead up ramp
Max lift is 680kg

this sounds like a possible check valve problem.
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Old 03-05-2012, 03:57 PM   #4
gsweave
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Phil,

yea
sounds like a check valve,

You might want to crack her open clean and inspect.

portapower? nice back up jack


Damn nice shop bub!!!
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Old 03-05-2012, 07:21 PM   #5
wos
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I have a floor jack that did that to its last owner. It was lent to the idiot next door who used it for a weekend. When it was returned it would pump up slowly and slowly drop. The owner was moving and didn't. Have time to deal with it. In the process of taking it apart I found the lowering valve to be entirely the wrong way, spun put out instead of in. Has worked fine since.
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Old 03-06-2012, 05:58 PM   #6
katbeanz
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Location: Kansas City
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I can't make out the original pump, was it something like this?

http://www.harborfreight.com/10000-p...ump-98318.html
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