J&S 540 Hydraulics

Advert

New Replies

Report Bug

Help/FAQs

J&S 540 Hydraulics

This topic has 16 replies, 9 voices, and was last updated 26 March 2022 at 06:53 by David George 1.

Viewing 17 posts - 1 through 17 (of 17 total)

Author

Posts
22 January 2022 at 16:45 #581735
Bob Astill
Participant
@bobastill76884
Hi all finaley nearly got the J&S finished ended up getting the motor rewound thats what the smoke was any way it is all back together and it suns smooth but as soon as you turn on the bed starts to move and the lever wont stay up its like the preasure is high and the lever is stiff. now if i let it run for 30 or 40 minutes it will stop when you press the lever and it parks at the right hand side like it should. thin i press the start lever and off it goes but you can see the start lever pulseing up and down. my question could i have used a hydrolic oil thats a bit to thick or could it be something else?

Thank you Bob
Advert

22 January 2022 at 16:45 #20582
Bob Astill
Participant
@bobastill76884
Stiff Start
22 January 2022 at 16:49 #581736
noel shelley
Participant
@noelshelley55608
WHAT OIL SHOULD BE USED ? what oil did you use ? Noel.
22 January 2022 at 17:05 #581740
Dave S
Participant
@daves59043
Iirc it’s 32 weight hydraulic oil. Think I put Castrol Magna SW 32 in mine.

Which lever is giving you trouble?

Dave
22 January 2022 at 17:20 #581743
Baz
Participant
@baz89810
I think we used Tellus22 in ours, but it was a long time ago, the only thing that makes me sure is that I still have gallons of the oil in the back of the workshop.
22 January 2022 at 17:43 #581747
Pete Rimmer
Participant
@peterimmer30576
Mine ran ok on iso32. HAve you looked at checking the oil pressure and perhaps adjusting it? Mine was an older model but it had a pressure regulator on the top of the pump.
22 January 2022 at 19:28 #581768
Mark Rand
Participant
@markrand96270
The J&S recommendation is Vacuoline 1405. That's also ISO32.
22 January 2022 at 21:32 #581797
noel shelley
Participant
@noelshelley55608
iso 32 is SAE 10.
22 January 2022 at 21:33 #581798
Chris Crew
Participant
@chriscrew66644
The manual states that maximum hydraulic oil pressure is 120 lb/sq.in (.4 kg/sq.cm). It states that adjustment will rarely be necessary but to use a pressure gauge on the output when adjusting the relief valve. If you PM me with an email address I can try to send you a scan of the relevant pages from the manual if you don't already have one but that is about all it says. There is an illustration of the relevant parts and a hydraulic circuit diagram, if that is any help?
23 January 2022 at 17:12 #581948
Bob Astill
Participant
@bobastill76884
Posted by noel shelley on 22/01/2022 16:49:50:

WHAT OIL SHOULD BE USED ? what oil did you use ? Noel.

Hi Noel I can't remember a friend gave me it saying it would do I think I am going to have to change it to find out I just wondered if its thicker would that be the problem?
23 January 2022 at 17:14 #581949
Bob Astill
Participant
@bobastill76884
Thank you all for the replies I am going to order some 32 and see if it curers the problem if not I will buy a pressure gauge to check it I have the manual so should not be to hard.

Bob
23 January 2022 at 19:37 #581975
Mark Rand
Participant
@markrand96270
A major reason for the recommendation of a 'thin' oil is that it is also the way oil. The ways on the grinder move a lot more rapidly than lathe ways!
26 January 2022 at 10:24 #582448
Bob Astill
Participant
@bobastill76884
Hi guys sorry for the delay flat out at work My friend said its Morris Lubricants Triad iso 46 oil so i hope this is the problem i assume 46 is a fair bit thicker than the iso 32?

Bob
26 January 2022 at 11:24 #582455
Ex contributor
Participant
@mgnbuk
i assume 46 is a fair bit thicker than the iso 32?

Yes, 46 is noticably thicker than 32.

The Gildemeister lathes at work use 46 hydraulic oil for spindle gearbox lubrication & the difference in thickness can be seen over 32 (kept for hydraulic top-ups) when decanting from barrel to jug.

Hopefully changing to the correct grade will sort your problems.

Nigel B.
26 January 2022 at 16:25 #582519
Bob Astill
Participant
@bobastill76884
Posted by mgnbuk on 26/01/2022 11:24:07:

i assume 46 is a fair bit thicker than the iso 32?

Yes, 46 is noticably thicker than 32.

The Gildemeister lathes at work use 46 hydraulic oil for spindle gearbox lubrication & the difference in thickness can be seen over 32 (kept for hydraulic top-ups) when decanting from barrel to jug.

Hopefully changing to the correct grade will sort your problems.

Nigel B.

I hope so as well

Bob
24 March 2022 at 11:26 #591396
Bob Astill
Participant
@bobastill76884
Latest update.

Hi all many thanks for all the advice it turned out to be several problems firstly the motor was bad and needed a rewire (not cheap) the 40 oil was to thick ans lastly i had the 2 pipes to the pump the wrong way round they are supposed to cross over (seems wrong to me ) but it is now running great and doing a loverly job so thank you all.
26 March 2022 at 06:53 #591621
David George 1
Participant
@davidgeorge1
Hi Bob nice to hear that your grinder is working well. So many times we don't hear the outcome of restorations and work done on here.

David
Author

Posts