Rear Tailgate Hydraulic Pump

[Mark David broadhead]

Hi every one
I have a 2010 ml 350 the tail. Gate only works when I heat up. With a hair drier when the heat drops off the gate don't work other wise when warm the gate fine the oil. Inside is the right oil the motor works fine so can. Any 1 put light on the matter has I carnt have a hair drier plug in just to. Keep. The motor and oil warm

 

[V6Matty]

I could have sworn the boot is electrically operated on these, I know it is on my E class.

 

[ajlsl600]

I could have sworn the boot is electrically operated on these, I know it is on my E class.

same as that, will have to check.my ml250

 

[Mark David broadhead]

I could have sworn the boot is electrically operated on these, I know it is on my E class.

Yes the motor is driven by the eclectic but the pump drives the oil I carnt under Stan it when the unit is warm it works but when cold it dosent???

 

[ajlsl600]

Yes the motor is driven by the eclectic but the pump drives the oil I carnt under Stan it when the unit is warm it works but when cold it dosent???

bizarre, oil viscosity ? better electrical connectivity ?

 

[LostKiwi]

bizarre, oil viscosity ? better electrical connectivity ?

Sounds like a classic dry joint on a solder connection somewhere to me.

 

[Mark David broadhead]

OK thanks guys I'll. Look into it but thank you both for your help

 

[peterws1957]

OK thanks guys I'll. Look into it but thank you both for your help

As a matter of interest, why did you think of using a hair drier on the pump? If you've been using it to dry out a water ingress I would suspect an electrical fault. I take it that the fluid level is OK?

 

[Mark David broadhead]

Yes the fluid level. Is fine no to start with I thought it was the old oil in the pump so I used the hair drier to heat up to thin the oil and that how it started working again so. I changed the oil to the shell one but it still didn't work when it was cold only when I heat up the pump are the oil but I am. Going to check the conections on the pump look for any thing unusual??

 

[Mark David broadhead]

Right ever1iv stripped the pump. And clean all. Contacts and cleaned coil ect put it all back together guess what
YES IT ALL WORKS FINE thanks every one for your input dud appreciate it mant thanks to all

 

[peterws1957]

Very satisfying when you can fix a problem yourself. I dread to think what an MB dealer would have charged you for sorting that problem. You can see the bill can't you - diagnostics, replace pump, replace oil, test drive, change brake discs and pads......