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Posted by Emimec on November 30, 2008, 6:03 am
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Noticed yesterday that the old J&S 540 surface grinder, which doesn't get
used much, was acting strange. When the cross table traverse feed is in use,
it slows down the x axis power feed?
I checked, and topped up the oil, so apart from that I am at a loss.
Any ideas ?
Bob
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Posted by Andrew Mawson on November 30, 2008, 6:59 am
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> Noticed yesterday that the old J&S 540 surface grinder, which
doesn't get
> used much, was acting strange. When the cross table traverse feed is
in use,
> it slows down the x axis power feed?
> I checked, and topped up the oil, so apart from that I am at a loss.
> Any ideas ?
> Bob
>
>
OK it's a hydraulic pump belt operated iirc. The cross feed is a
rachet thingy that obviously takes some oomph to operate and push the
table, so it suggests that the hydraulic long feed is marginal or the
amount of oomph required is abnormal if it is being slowed down.
So is the belt tight, is the pump worn, is the workshop unusually cold
making the oil more gummy, is the cross slide adequately lubricated?
Some of the oil from the long feed cylinder goes via drillings to
lubricate both the long feed and the cross feed - are the drillings
blocked. Are the catch buckets at each side of the base under the
table filling with oil that then drains back to the tank as it should,
or are they dry? (This is the oil that lubricates the ways)
AWEM
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Posted by mark on November 30, 2008, 8:53 am
Please log in for more thread options > Noticed yesterday that the old J&S 540 surface grinder, which doesn't get
> used much, was acting strange. When the cross table traverse feed is in u=
se,
> it slows down the x axis power feed?
> I checked, and topped up the oil, so apart from that I am at a loss.
> Any ideas ?
> Bob
being as you don't use it much
hope you haven't overlooked the obvious
there is a small lever on its own...to the left on the control plate
this controls the wumpth that is given to the x-feed.
you can have so it gently activates it ...or have it so it almost
jolts it .
this i think is a feature to get a better finish out of it.
also on the big handle on the front within is an x shaped small
knob .......if this is tightened right up the x-feed will struggle.
all the best.markj
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Posted by Mark Rand on November 30, 2008, 6:19 pm
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>Any ideas ?
>Bob
>
Over and above everybody else's comments. The 1400 has a Purolator "twist the
handle to clean, every few months" filter. If there is a similar one in the
540, is it blocked up with sporge?
Had the 1400 running for 6 hours solid today. The workshop got nice and warm.
:-)
regards
Mark Rand
RTFM
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Posted by mark on November 30, 2008, 7:56 pm
Please log in for more thread options > On Sun, 30 Nov 2008 11:03:57 -0000, "Emimec" <emi...@NOSPAMbtinternet.com=
>
> wrote:
>
> >Any ideas ?
> >Bob
>
> Over and above everybody else's comments. The 1400 has a Purolator "twist=
the
> handle to clean, every few months" filter. If there is a similar one in t=
he
> 540, is it blocked up with sporge?
>
> Had the 1400 running for 6 hours solid today. The workshop got nice and w=
arm.
> :-)
>
> regards
> Mark Rand
> RTFM
no such luxury's on my 540 ..
it relies on a wire mesh basket for the oil to go into before it
enters the sump ......
plus the wells at each end of the table act as settlement reservoirs.
and the vast quantity of oil in the tank .with oil pick-up high ...so
that the rest of the crap settles to the bottom of the tank.
the oil pick up has another fine mesh cylindrical filter....this may
be worth a check .but requires you to...remove front panel, disconnect
hydraulics, pull the whole tank out..........unbolt the rubber mounted
motor and hydraulic unit from the tank .and invert it to get at the
filter.
if you get that far ...you may as well empty the tank .clean the
tank .and put new oil in it. 18 litres / 4 gallons of Mobil vacuoline
1405...this should be changed every twelve months if you use the
machine every day
all the best..........mark
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