QuickJack - Pump failure?

[Richyvrlimited]

I have a set of Quickjack, bought a few years ago and they've seen pretty light use. they're a set of BL-7000SLX and generally use them to lift my MK1 MX5 (yep massively overkill, but were on offer from CostCo) MX5 to a comfortable working height.

On Sunday I used them to lift my Honda E which is well within the lifting capacity, It lifted the car fine to full heigjt, I dropped to the saftey bars and did the work I needed to do.

When trying to re-raise off the safety, nothing. I can hear the pump spin but as far as I can tell I am getting zero pressure in the lines.

Manual suggests air in the system & to attempt a bleed of the pump by removng the pressure relief valve, blocking the port with a rag and your finger and running the pump until you feel pressure.

Did all that an no difference.

I'm extremely lucky that my father has the same system, I've borrowed his pump which meant I could get the car back on the ground. This also rules out air in the lines and jacks themselves.

However I've now got a system I can't use, and so far QuickJack haven't responded to the support ticket I've logged & email I've sent them.

Anyone else had a similar issue & managed to get it working?

[GreenV8S]

No experience with QuickJack, but hydraulic systems like these typically use a pair of one-way valves, which could be as simple as a ball spring against a seat. If you can locate them, you'll probably find that they are relatively simple to repair.