L&S Model X 14" HD oil leak
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  1. #1
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    Default L&S Model X 14" HD oil leak

    I have a 14" HD L&S Model X, the one that has the slide ruler type speed chart. Runs great but just developed an oil leak at the spindle just behind the D1-6 plate. Not too bad, 1 drip in 30 seconds. I've owned it for at least 10 years with no leaks. I have the parts manual and Slinger Rings are shown as seals. Anyone have information on why it started leaking?

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    Wrong oil -foaming ,over full ,drain from bearing restricted/plugged.

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    drain from bearing restricted/plugged
    Would be my guess if not overfill

    No rubbing seals for sure

    Next time you move it tilt it up and watch the oil run out

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    I have been using the lathe for 10 years and not a drop. Could it be the oil is low and the pump is causing it to foam? I have not added oil, only thing I've done was remove the top cover and put on Permatex gasket sealant to stop it from leaking, I did run the motor to confirm oil was pumping. It has a sight glass on the front near the filter/strainer but it's dark and I can't see what I think is supposed to be an oil stream. Looks to be another sight glass on the reservoir but the electrical control panel is mounted in front of it. This lathe has no oil in the headstock (I think) oil is in the reservoir. Both sight glasses are the same, the push in type so I'm not sure how to remove them. I might remove the front one, if I damage it I'm sure I can make another.

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    Yes to low oil with pump sucking air. Figure out how to check oil level and add if needed . If pump is not submerged below the oil level supply pipe [or whatever] may be allowing air leakage on suction side.If these items check OK blocked oil return at the bearing most likely. Had a 18" ENCO lathe with splash lube and would leak at the front bearing if I ran it over 4-500 rpm. Partial cure was to put a restriction in the 3/8 or so oil feed drilling,1/8 " or so hole in restriction fitting.

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    May be the rear sump style? - pump has to pull the oil up and on to the distribution trays. Sump is low, bolted to bottom of rear head stock casting. Need to be able to SEE oil in its pair of sight glasses, one over the other

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    Yes it is the rear sum/reservoir style. I didn't see 2 sight glasses on the rear reservoir but will look again. However the one I did see was dark like the one up front so level could not be detected.

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    Quote Originally Posted by Froneck View Post
    Yes it is the rear sum/reservoir style. I didn't see 2 sight glasses on the rear reservoir but will look again. However the one I did see was dark like the one up front so level could not be detected.
    Here is how my 20 standard (a raised 16") sump looked
    Attached Thumbnails Attached Thumbnails dcp_1086.jpg  

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    Mine is very similar. The is a second sight glass, it's below the top one but slightly to the right just above what looks like a brass fitting on yours. Very difficult to see and harder yet to determine oil level because it's blackened but behind an LB electrical fitting for the switch conduit connected to a rather large electrical box containing the motor controls.

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    That's it for oil supply - there isn't any in head stock simply because the head stock has a hole in the rear bottom that matches the top of the sump.

    The two sight glasses tell me the level should be somewhere between them vertically

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    I bought the L & S from John way back and finished reconditioning it. The times I ran the lathe, I did recall a little bit of seepage from the headstock bearing cover. I've seen this type of leakage before on older lathes in my past.
    The first thing I would do is replace the sight glass on the front of the head stock. Real easy to do, bust the glass out, drill and tap a 1/4-20 or 28 hole thru the back. Take a large socket and bolt and washer and pull it out. That sight glass is a standard Bijur part that the last time I looked, it is still available. Replace it, while you are at it, pull the Cuno filter and clean it. Last drain the head stock oil sump as John is talking about and might not hurt to flush out with some mineral spirits or diesel. Then fill with a ISO 32 or 46 hydraulic oil. This oil should have additives that my help unclog some of the oil passages that may reduce some of the oil leakage that you are seeing. I wouldn't try to pull the spindle to clean out those passages. That's not an easy spindle to pull and put back end IMO. Ken

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    Thanks Ken, I did plan on removing the front sight glass. I checked McMaster and see they have a similar type in that the "glass" is not flat but projects out like a bubble. As to the ones in the rear on the reservoir I would like to replace them with the McMaster type but the electrical box makes that quite a project so I'll leave that to a when I have time. I plan to remove the top cover, drill and tap two holes for 1-1/2"round X 8" legs to mount a piece of 2" X 2" X 1/8" angle about the width of the head stock. I have found the CXA size tool holders hang well on that size angle. (CA will not)I made similar tool holder for my Hendey and love it! So with the cover removed I'll try to add something to clean out the oil passages and replace the oil with new.

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    Had some spare time so I removed the sight glass and intended to remove the filter. I'm wondering if I have to remove the cover on the Head stock to disconnect any oil lines. Though I have quite a few lathes the L&S is the only one with long centers so I don't want to start something I can finish quickly. The sight glass opening can be covered quickly with a clear plastic plug and the oil leak isn't that bad I can't get by if I need long centers. I primarily do maintenance work so if one of my customers need a log shaft made yesterday the lathe will be available. When I do decide to make the repairs I'll paint the Head Stock, I started by painting removable items but replaced them when paint dried. Having to remove that tail stock for a very long job and using 2 steady rests I removed it by disassembling it (makes it a lot lighter)but when reassembled I painted each item so now it looks almost new. Intend to eventually do the entire machine.
    So please let me know what I must do to remove the oil strainer.


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