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excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5843

1999 Defender 110 Td5 SW Caledonian Blue

Bleeding - Sealey hyrdraulic press

I have a Sealey hyrdraulic press - yk10blg (no pressure gauge model)
This might seem a daft question, but how do you top up/bleed the hydraulic fluid?
The hand operated pump is seperate i.e not bolted to the side of the press like i have seen some pics of.
When I operate it, normally its on a bench or clamped in a vice so it does'nt move around.

I know I have a slight weep which I is why I need to top up/bleed the fluid(ultimatly I need to replace the seals...) 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

15th Jun 2020 7:01pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

I'm not familiar with that particular model but they're all much the same. There'll be a filler plug at the non-handle end of the pump, probably on the top surface. If it's a quality pump like an Enerpac it will have a dipstick, but with the generic Chinesium pumps there may not be.

To bleed, just make sure that there's plenty of hydraulic oil in the reservoir (if it's low, raise the non-handle end of the pump slightly) and fully extend the ram. When you release the ram, any air in the system (which will have formed a bubble at the top of the ram) will pass back through to the reservoir. Hey presto, system bled and embolism free! Simples.

If you top it up, use a decent hydraulic oil not something like brake fluid which is harmful on most seals. I generally use Castrol Hyspin AWS22, but places like Machine Mart sell sensible sized containers of hydraulic oil (which is actually good for machine tool moving parts too).

15th Jun 2020 7:22pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5843

Cheers BW. I shall have a look tonight after getting some hydraulic/jack oil. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

16th Jun 2020 7:56am

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5843

Got some oil today. Noticed for the first time since owning the press there is a hook to hang the pump off.
With the pump hanging up, I removed the top bung to find this had a dipstick setup with two marks to show min/max. It was dry.

Topped up with around 200ml of fluid.
Worked the ram up and down and undoing the filler air escaped.
I took the view that with the ram compressed that was the best time to top up as when extended all the oil would be in the ram.

So far i think its ok. There is a slight weep on the ram but hopefully still able to press what i need to press.
Thanks BW

The press.

Click image to enlarge 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

16th Jun 2020 5:56pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

If you top up with the ram extended you'll either never get it retracted or you'll get a massive and unwanted discharge from the vent!

16th Jun 2020 6:21pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5843

and that woulnt be good! 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

16th Jun 2020 7:01pm

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