HYDRAULIC FLOOR JACK REBUILD

We rebuild our Hydraulic Floor Jack from the 70's
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[@gar5952010]

I was going to throw away my craftsman hydraulic jack away , but after watching this video I'm rebuilding my jack .

[@bobbydee1187]

Me too. I have several laying around the shop I can now rebuild.

[@hoeacio]

Same here. Got the same one and I was about to trash it until I saw this.

[@daver681]

I cannot believe it, I finally found someone rebuilding something and talking about what he is doing,

[@constantinehatzis2807]

Totally agree, and it's not done at an impressive lightning speed!

[@allenhonaker4107]

Go check out mustie 1 on utube for more rebuilding stuff. He's great

[@Flussig1]

And he wasn't "restoring" it, just a reseal which is all you need, that is if you actually plan on using it.

[@leonardotopa5998]

I just rebuilt my 20+ year old Sears 3 ½ ton floor jack. This video helped me understand what I had to do. My main problem was with the big seal at the tip of the shaft for the piston. I didn't mess with all the other smaller o-rings and screws with ball bearings underneath. Thanks for putting this together. Now I have my old heavy jack that I use again. Safety thought: when I first noticed that my jack was no longer working well, I had just lifted up my car to change a wheel. When I went back 5 minutes later to put the new wheel on, I saw that the rotor was very low on the ground. I don't even want to think of having someone (me?) working under the car while this happened.

[@krflibbish2655]

When I was working after school in a garage (long ago) an old mechanic told me to never trust a hydraulic jack. He said to always use jack stands and pointed to a car across the shop floor which was up on a floor jack and no stands. Amazingly, the jack suddenly lost pressure and the car fell back onto the floor. Thankfully nobody was under it. That stark lesson has remained with me.

[@Jay.Kellett]

Always have a back-up jack stand or log under the frame!

[@johnsmiley9830]

I recommend using a thin coat of the hydraulic jack oil on all o-rings and seals as a assembly lube. Do not contaminate the hyd. system with other products. Thanks

[@bobg7288]

very important,,,,, never reassemble DRY

[@phill3583]

Absolutely important. I was cringing the whole time.

[@domeniconelli8382]

@@bobg7288 never contaminate it with Vaseline from 1984. Hydraulic fluid ONLY!

[@antoniocamesa2037]

Nowadays there's particular "O"ring lube in the market

[@specializ20]

Contamination is not an issue. Use what ever is handy

[@anothernic]

Realize the video is four years old, but this majorly helped me to do basic maintenance / repair on a 70's Orange and White jack that looks very similar. Dad has had it since before me; the release valve stopped releasing. Got it apart, cleaned, and back to working with new fluid. Thank you for your detailed descriptions and hard work :)

[@stephenfoster9009]

Thanks for putting your crescent wrench the proper way to break it. I see so many push against the small, moving jaw.

[@ralphblanda661]

I have it for 50 years , been rebuilt. 2 years , now it's as good as new , & 80% still has original color

[@wayneclark7048]

Great job.

[@michaelr.7726]

one of the best videos I have ever watched you did not tell me about your wife your kids the grass how long you've had the Jack when you bought it none of this other stuff you were right to the point great video. Easy to follow along and mine works perfectly after the rebuild thanks.

[@kennakada1208]

Nice work. You made it look easy, but there’s a lot of experience in those hands. Nice garage setup, nice tools, and a really nice car!

[@805ROADKING]

Thank you Ken!!☺

[@MrSamBowers]

Your video is the most detailed one I've seen about rebuilding hydraulic floor jacks.

[@paulwagner5367]

That's an Astroline made in Japan it's a great unit have had mine 35 years rebuilt it twice still works great.

[@AndyDepwe]

Thank you for taking the time to make that video. I got an identical jack that recently quit working from my grandfather. The rebuild is going to be easier than I expected with the help of this video.

[@rozaroza6757]

ХХХ то

[@djones02]

This actually helped me get my jack working again, somehow. Mine is completely different but just watching someone take it apart helped give me an idea. I realized I had opened something I shouldn't have and a part fell out. I took another look and sure enough I found a tiny piston lodged in a crack in the jack. Used the magnet trick with an awl to get the piston and spring in the correct position. Jack is now working good as new. The oil was low which was I took it apart in the first place but I opened the wrong part and the manual doesn't actually tell you what to do. The manual even labels every part except the holes... go figure.

[@superbaron01]

Word of the day....vase ..o..line.. Phase of the day..put a little ass behind it.. Best video ever!

[@edspencer7121]

28 years ago I got a harbor tool and equipment jack just like that and a set of 6 ton stands from my parent's as a Christmas present. As a matter of fact I just got done using it and put it away about 10 minutes ago. Had my Altima up on stands and took the tires and rims to Walmart for a new set of tires. Best gift I ever received! She seems a bit slow so I'll be doing this rebuild in the near future. Thanks for sharing. It took about 3 beers to get through this video BTW.

[@Ricopolico]

Finally, a real jack rebuild and not just a Krylon paint job. Thanks. Also, thanks for showing all the newbies what it means to put packing under a workpiece held in a vise.

[@billsmith2212]

I had a bottle jack , about 20 ton , from the 1930's that my grandfather used on dump trucks rebuilt about 25 years ago . It still works !

[@3MonkeysGarage]

have the same jack I have been wanting to rebuild for probably 12 years. Thanks for making this one. Maybe I can get the ol girl lifting again now

[@freddean995]

Great work man. I Cut my teeth on floor jacks just like that. Back in the 70's too. Brings back memories!

[@j3rocketeer]

Excellent work and fantastic video

[@Scotta1atgmaildotcom]

I believe in life long tool ownership, so I buy as high a quality as I can afford, and this is the kind of video that reinforces my mindset. You can't rebuild garbage tools, not without access to machine tools or something excessive like that. Thank you for taking the time to make this video and to give an explanation along the way.

[@oscardansso6578]

thanks for share your experience and skills!!!

[@vincedemarco7695]

Hi Great video. I have an Australian made APAC 241v 1500kg jack that I brought when I an apprentice in 1973 used every now and then has paid for it self over and over . I had it reconditioned in 2010 for $242.00 by a jack reconditioning guy who had a huge workshop at home in Melbourne Australia . I know it was a lot but I saw some of the stuff that was for sale then and even now ,can't compare to my old jack . Plus when I went to pick it up we were there for over an hour looking at all his engineering gear and he showed us other projects he was working on . Had a Great time with my young son who was with me then.

[@scarab280ze]

that BLUE PLUNGER WAS ALL THAT WAS NEEDED !! the black one was whooped fyi . thanks for the video iwas very good I have a bunch od Lincoln and Walker jacks from the 70's and have rebuilt them and this is the type of info our kids need. you know our 30 and 40 year old kids. Thanks again.

[@sharonbaldwin5425]

I love that. Yes there are 30 & 40 year old kids who could learn a thinga 2.

[@sharonbaldwin5425]

Joe Shabidu Keep rockin', Every repair is a confidence builder, and you're never done. Recent additions to building skills- trigger spring on a top-break revolver, patch plastic ends of radiator with epoxy. The stuff was broke anyway, I dont think much more harm could be done, if the fix didn't work. Best wishes!

[@graymodeler]

I have an old Blue Walker with the yellow one piece handle from the 70's I had rebuilt in a jack shop. Just sent the pump in.

[@jkuebler8911]

Great video. I've got an old Sears jack I got from my grandpa's garage after he recently passed. It hasn't worked in about a year, same issue as yours. I've got the rebuild kit coming and am confident I can do it after watching your video. Thank you!

[@j.rothchild173]

I got 2 and i was about to throw them away! Thanks, got a weekend project now!!

[@vsat88]

And this is the way it is done folks. This man knows value. He is not at all afraid to tear into this jack and fix it right back up. American made old jack better than a new China made. I do not trust either one of my floor jacks, both made in China Husky branded. I would trust this Craftsman though. Looked everywhere for one before I bought the Husky Home depot ones. Both, within three years do not want to go back down unless they are pushed down. Thanks for this video. You are what the U.S.A. are all about.

[@CL-yp1bs]

Thank you for the great info! I found an old jack on craigslist recently just after watching this video! I am saving so much money and its fun to rebuild it as well! Cool stuff!

[@christineh8996]

Can you tell me where to find the rebuild kit for this jack?

[@stephendee7839]

I love this video! Thank you so much for making it. You included everything needed to know with clear instructions, audio and editing. So good!

[@805ROADKING]

Thanks Bud!!☺

[@testuser3167]

This randomly popped into my feed, and I'm really glad it did, because it never occurred to me how easy it was to rebuild one of these jacks. I've got an old Harbor Freight 3-ton that isn't working anymore, and it may be cheaper to repair than replace, plus I've got an old aluminum Harbor Freight model that doesn't hold or pump up anymore - hopefully I can find a rebuild kit for both of those! Thanks for the inspiration!

[@colron5727]

The beauty of the internet is in my opinion, someone somewhere in the world will have an answer for something. Who knows what could be solved in any field, thank you everyone who takes time to post their version of things

[@805ROADKING]

Thanks Mate!!☺

[@JohnSmith-nw2ls]

Great video. I once bought a similar floor jack like yours dirt cheap because it leaked down, the fix was very simple, ran a magnet down into the seat of the check ball, pulled out a tiny metal shaving. Jack worked fine after. Easier and cheaper to try the magnet fix before rebuilding

[@johnbennett3274]

What do you buy the gaskets at

[@waldonherdman1447]

Thanks for the video. I have my father's 5 ton bottle Jack that is probably 45 years old. The local cylinder shop refused to rebuild it. "It's cheaper to buy a new one" was their answer. Now I can rebuild it myself. Thanks!

[@petej.8676]

I have a Sears 2 ton floor jack from 1989. Still works but now I have the confidence to rebuild it thanks to your video! Oh...and a large crescent wrench has saved my ass more than once!!

[@duanedonaldson2262]

Safety TIP for jack users, when you lower the jack, tighten the handle so its immediately ready to jack up again, example, you jack up your car, you let it down onto some safety stands, one stand slips out and that part of the car falls some, you are ready to jack fast in case of a problem, been there, done that. DO NOT use your jack only, put something else under the car for safety, even the wheel and tire you may have pulled off. As you can see, it only takes a blown seal to allow the jack to come crashing down. Awesome video, time for me to order my rebuild kit.

[@azjay1]

Great video! I have a Sears jack about the same age that I'm getting ready to rebuild. Thanks for taking the time to make this video.

[@805ROADKING]

Thanks Bud!!☺

[@Citadeltactical]

Nice work I have my Grandads jack that I used to work with him in the shop when I was a Kid. I have had it since he passed away and it needs rebuilding. My wife always asks me why I keep it and it means the world to me. I can't wait to rebuild it now. It is from the early sixties and look forward to having it work like it did 25 years ago! Thanks for making the video.

[@rondeaner6909]

Citadel Tactical blunder

[@Jay.Kellett]

I picked up a 3 1/2 ton Craftsman on the side of the road for free. In real good shape. It jacks up fine for changing tires, but drops in about a half hour. Going to rebuild it this winter, some cold snowy day. LOL Thanks for the preview of what I'm in for!

[@eddiegarcia2090]

Great video thank you for the knowledge. Much appreciation.

[@alkoohy9761]

Using my favorite hammer!! I've used this body hammer for years as a precision adjuster for seals, etc. Works perfectly!! Nice job!!

[@sagarman000]

Excellent video. You're right in that the outer seals are wipers to keep contamination from getting inside the pump, so they are installed with the cup facing out. I have the same jack and I'll be rebuilding it this weekend. Thanks for the tutorial.

[@trevortrillion6037]

I have a "Big Lots" Chinese jack from 1980, $29.95, WAY before Harbor Freight, with the same leaking oil problem. You have inspired me to try a repair later on...thanks! I'm rebuilding power window motor gears now, all learned on KZbin.

[@shobud7561]

Great job .. I use to rebuild these jacks back if the 70s & 80s, and let me say they were good jacks . The crap coming out of China , well you know . Hine Warner was a good Jack, Sears actually sold this jack in different lifting capacity with the SEARS logo . Also Lincoln was a vere reliable floor jack, same as the Walker well back in the 50s . This junk thats available today is use it and throw it away when it falls .... The old school of rebuilding things are a thing of the past anymore.... Thank you for posting this video, brought back many memories...

[@805ROADKING]

Thanks Bud!!☺

[@jbjmz6015]

Your video made me go out and clean my floor jack-It’s a Sears Model too and identical -I bought it in1983 and has lot of sentimental value-lol!!!...great work and video!!!!!!!!

[@travelingkaspersworld4096]

Our too....1981 I think. Now we have four of them

[@lewiswhitt6099]

I

[@davidbygott9385]

I needed to service a Pro-Lift 2.5 ton jack and found this very helpful. The construction is very similar.

[@brianharding7369]

Great video. Auto body tip. When using hammer hold index finger pointed up onto the handle towards the head of the hammer. Gives much better control of your grip and aim while striking. Give it a try.

[@donmadick6813]

I thought at first that I was seeing things. I have the EXACT same jack, and I've been using it on a regular basis since I bought it back in the early 1970's. That thing has lifted every one of the nearly one dozen cars and trucks I've owned or used over the last four plus decades. Next best thing to a full sized lift. Excellent video! Thanks!

[@805ROADKING]

Thanks Bud!!☺

[@donaldbutkus532]

Thanks for this video. Just finished rebuilding my Sears jack. Works like new.

[@mrrichies.1237]

Good job. My Dad bought me the same back in 1974 @ SEARS/ROEBUCK store in No Dartmouth,Mass. Just used it last nite to remove my winter Brighstone tires (Snowtires) Still works like a charm. Thanks A Lot.

[@dirtfootracing8788]

Just got one of those jacks that was my grandfathers....my dad was going to put it out for the scrappers. Its rusty and needs seals. A rebuild is in the works ...Thanks

[@timmygilbert1371]

Great job , glad you were able to save it . Great quality jack .

[@timmygilbert1371]

Got the same adjustable wrench i inherited from my Dad . Love that thing !

[@dalebarrow]

I bought mine new in 1983. FYI: it weighs 90lbs. Thanks for putting this together.

[@ti0039a340]

you are the first person who did a repair and not a restoration and who actually do show it step by step Thanks. It was educational

[@Lawnmower-os5pg]

You really can’t beat the quality of these old floor jacks 👍🏻👍🏻👍🏻

[@Tjousk]

Indeed

[@805ROADKING]

Yeah Buddy!! ☺

[@mikedoingmikethings702]

Awesome work!!! I love the vintage tools! I would have went with scraping the old paint and give it a new coat lol

[@rakkassan2187]

Still using a screw driven jack From 1967..(ih scout). But it's nice to have this knowledge. Thank you.

[@Bob-eb8km]

Love the Big Alabama socket, Everyone needs one!

[@michaelg7456]

Wipers are used for keeping debris from entering the area. Seals are usually installed with the open end towards the pressure side so they will expand during pressure making a tighter seal. There's always a chance that the previous seal was installed backwards. If you get a leak, flip it over.

[@kenswitzer4133]

The screw, spring and pintle are an over pressure relief valve. Thanks for the video. Good job👍

[@GRAYSTAW]

Ken, Do you know what the approx. setting is on that pressure relief screw? Thankyou Sir

[@businessmanager6906]

@@GRAYSTAW 8 full turns on mine, which was about one turn past where the spring started to engage.

[@lonniecrook1684]

A good lesson in parts management and taking note of the number of rotations to remove those valves. Wish I had done that!

[@jaywatts333]

i started dirt trk racing in 1997, i retired in 2013. when i started i bought a harbor tool blue & silver floor jack. now it is 8-7-22 and that $50 jack is in my shop helping build rat rods. go HF&T.

[@mikeshepard3602]

Well, I finally found a use for my dads old 24” adjustable wrench. Great video👍

[@richardgoehler2424]

No no him look by my noi by hi it

[@garybowe7959]

Good memories of working in the garage with my Dad back in the 60’s. We had the same jack. Wish it was in my garage today. Thanks and God Bless.

[@mousetoad7040]

I'm using a USA made Black Hawk floor jack from the '60s, may need a rebuild, needs fluid again. I love that thing because you don't have to put the handle up all the way to get it to jack, unlike the newer ones. If it is deep under a low car, even a few inches of the handle will raise it up quickly.

[@user-yf1fe7ei7n]

That was a great detailed video of how to rebuild a hydraulic floor jack thank you very much

[@chrishereford5969]

Thank you for taking the time to put this together. I'm sure so many of us will benefit from your work and positive attitude. God bless!

[@805ROADKING]

Thanks Bud!!☺

[@synthpro]

You have inspired me to rebuild my old jack, it died on me a few years ago. Thanks for the video, enjoy all the engines as well.

[@bondo_channel1706]

These are treasured shop jacks. They were manufactured by Mitsubishi in Japan. Mine began leaking at the big cylinder cap with the 2" nut decades ago. I took it to a hydraulic place that serviced jacks around 2010 and they wouldn't fix it saying "you can get a new HF one for $100." Well, I did get a new low profile one. And it twists under a 2T load. I dealt with using both for a while until one day I did an oil filter cartridge on a Saturn and never replaced the black O ring on the plastic cap. The ring stayed in my "O-ring drawer" and one day realized it looked like the correct size for the Sears Jack piston cylinder. I flipped the jack on it's side with the piston still in it and the handle at 90 deg and was able to break it free. Replaced the ring and the oil and good as new.

[@rodmcclure7130]

LOVE THE REBUILD. Thanks for the knowledge that you have shared.

[@rickashay6023]

Got an old Sears jack I've had since I was a teenager it has the same problem so thanks to your video maybe I can do the same rebuild. Thanks for sharing.

[@jp040759]

Were you able to get the seal kit for it? I have an old sears jack that is 30 years old. Still OK but I might get seal kit before Sears is extinct. Please advise. THANX

[@shoeleh07]

Most major cities have a seal supplier. Google your city. Take the seals to them and they will match what you need. I rebuild a hydraulic cylinder and the complete seal package was $9.

[@jp040759]

@@shoeleh07 Good idea. THANX. Uncle Google to the rescue.

[@ELDIABLO444]

The Vaseline you used is fine depending on what kind of rubber, neoprene the o rings are made of, the tapered thing with the spring is a pressure relief valve that opens to let fluid out of the pressure cylinder back to the reservoir to relieve excessive pressure if you try to lift something in excess of the Jack's capacity (a safety feature no doubt) Good video all the best to you and yours Sir.

[@agoodgurl2k]

This ranchers wife out if Texas enjoyed watching this. I learned something and you're a good teacher!

[@805ROADKING]

Thanks alot!!☺

[@themetalmaiden7462]

Great video. I wish I had kept my original Craftsman jack from 1980. I sold it at a yard sale in the late 90's because it wouldn't hold pressure any longer. I wish I had fixed it instead.

[@willlee3378]

Thanks Roadking, I've got a old Sears Craftsman floor jack and I just got the rebuild kit. Your video helps a ton...Thanks !

[@shobud7561]

If it's an old sears jack its made by Blackhawk or Heinwarner.

[@iancameron1662]

Were did you get the rebuild kit

[@thomasopito7403]

Where did you get the kit

[@garyfairman2805]

Awesome editing bud, very well explained.. I give it a 👍up..

[@HemiCudaGuy]

Good video! Took me back to my "yute." :-) Just did my 1.5 ton green Sears 328.12002 that I bought new in ~1981 for $99, on sale. Great tool that now needed a rebuild. Instructions say to lube it every three months ... now 40 years too late! I have not read all the comments, so may have been covered: After taking the "power unit" out, clean/grease/oil everything else first -- you will be too eager to test the power unit after rebuilding it. My front wheels/axles and the rear wheels' ball and roller bearings were dry as a bone, for example. The trick for putting the handle-spring back in is to 1) remove the handle from the receiver (9/16" bolt), 2) install the receiver with the left bolt, loosely, 3) with the receiver straight up, use your thumb press the spring into the correct position, 4) screw in the (greased) right receiver bolt, 5) tighten both bolts. My plunger's seal was factory-installed "upside down," and the main piston's was "correct," so I put in the replacements those ways too after inspecting the seals' lips' orientations. My kit (Amazon) did include the white plastic washer that was said to be missing in the above video, and I had fewer leftover new parts. My power unit's outer cover/barrel would not budge (seemed press-fitted) so I was not able to replace its o-ring, if it has one.

[@MrThebeak]

bought same one in ny lasted for decades sars 99.00

[@ZachMontizor]

Almost spent $200 on a new jack to replace my 20 year old Craftsman. Thanks to your video we will try this first. Much appreciated.

[@sterlingdavidgrasssr]

Remember, your never to OLD to learn something, Thanks,i can see all those old jacks coming back to life , mine too.. Thanks

[@bvnseven]

Add to it the fact that it keeps you busy and out of the fridge...

[@bennyhill3642]

@@bvnseven LOL!

[@joecalderon6748]

Wwwby.

[@radioactivelarry]

Got the same jack from the 70's also! Great job.

[@foggiapainting]

You are awesome. I bought a 2.5 ton japanese jack just like yours on my 14th birthday for my first car restoration. I knew someday someone would teach me how to fix it. I am now 50yrs old. I am starting my rebuild on it. Thank you.

[@johnblair2362]

Greetings from northern Ireland, got a taskmaster jack that packed up today, chinese but lasted 30plus years, looks very similar, thanks to your video I'm going to have a go at fixing it, thanks!

[@bnbguerrero09]

You’d make an awesome Instructor for sure,thank you for the detailed breakdown it’s very helpful.

[@ToneFreqProductions]

You remind me of my ol' metal shop teacher from 40 years ago! Gr8 instruction & Thanx 4 the attention to detail boss, much appreciated!

[@perceive8159]

Good to know! I have vintage 3ton all cast 1945 Blackhawk floor jack that I'm going to restore, its a beauty!

[@rickjansen58]

Blackhawk floor jacks are King. I still have several from my 'Dad's Body shop from the 50's

[@onehunga-eq6wm]

Excellent Video to follow, its well worth to rebuild solid jacks like these, Thanks again.

[@jerrykast7713]

Thank you this just gave me the inspiration to dig out a couple of old jacks that quit working. Good job.

[@805ROADKING]

Thanks Bud!!☺

[@CombsSusan]

Nice, woke up to this playing and was one of the things I was meaning to learn.

[@erikjoubert7905]

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[@martylucas8557]

Ha! That happens to me all the time! 👍🏼

[@brucebowlsby2235]

Thank you for making this video. I was able to completely rebuild my floor jack. I purchased my Sears floor jack when I was 18. I didn’t want to get ride of it because of the sentimental attachment I have for it. My Dad and I use to work on my 56 Chevy and my 66 Lemans and I have used it for the last 60 years. Thank you.

[@sikazwejerry4620]

Thanks for rebuilding the Jack.

[@baumiiirobert]

The seal on the plunger was in backwards to keep dirt out, the o-ring keeps the oil in. it could be replaced with a double lip seal, but unnecessary, just put it in backwards like it was. Someone may have already commented on this, too much wow! to read to find out. I have the same jack and a 3 ton like it bought by me in'1982. Just ordered kits.

[@LightningFabrication]

I just finished watching this video. I have an Astro Jack that I bought off of the Mac Tool man back a few years before your petroleum jelly expired. It's the same exact jack that you have and bought from Sears. Mine was doing the same thing that yours was so I asked our Hydraulic shop about whether it was rebuildable and they said yes it's a copy of a Hein Werner jack (USA made). They told me to pull the jack from the frame and give it to them. They rebuilt it and gave it back to me. It's been working great ever since. Just one thing about the seals you installed. They are dust seals and are designed to keep dust and dirt out of the internals of the jack, not necessarily to keep oil in. That's why they were in stalled backwards. Nice job on the rebuild. Doug

[@mohabatkhanmalak1161]

Thank you, I attentively watched your video as I have a similar jack which I bought very cheap at an auction. They are a quality made Japanese product built for safety and long life. My jack also does not hold a weight and one of these days I will repair it referring to your video.

[@powersportsagainstlitterin98]

I have this Jack from my Grandfather, thank you for making this video bro. Thanks to your work Ill be doing the work to save the jack. Plesse keep producing fix videos.

[@vickashgoolcharan1925]

Thanks you for making this video. I'm a young mechanic trying to make do with what I got and this video has given me the insight to repair my old jack instead of replacing it. Thank you 😁

[@dalamar6228]

Thank you very much for sharing that rebuild with us. I learnt a lot tonight!

[@jameskeene2294]

I have a old bumper Jack and it leaks down also like the one in the video I'm going to take it apart to try to fix it only one thing wrong new cars don't have bumpers oh well

[@artsnow8872]

To remove the lip-seal from the pump plunger hole, use a thin-blade putty knife. A sharp round corner on the putty knife, and some gentle taps with a hammer, will allow the edge of the putty knife to go between the lip-seal metal rim and the hole wall. Then, pry out with a screwdriver. The lip seal is installed with the lip up. It wipes the push rod to keep it clean. The o-ring seal (and its nylon backing ring), further in the hole, contains the pressure produced by the push (pump) rod.

[@mikecurtis3333]

Great video. Told me everything I needed to know. In all the years I have had it I have never topped it up before. Mine had a Blue Point label.

[@gregbrissey5675]

thanks for the video, encouraged me to rebuild my 1980's craftsman 2 ton jack. it's back together and working great.

[@lisajohnson8566]

Nice job on the rebuild. I have been in the automobile repair business for over 45 years and still use my floor jacks. Never had to rebuild them but was always curious on what was inside of one. I found this video extremely interesting. Nice catch on that pressure regulator. I might guess that's the safety valve to keep from overlifting the jack and damaging it. But the process seemed pretty simple that you did here. I also liked your style of systematically rebuilding each section and also I liked the fact that you put that paper towel down in that cavity to keep trash out. You're truly a professional. Thanks again for taking your time to make this video. Nice job!!

[@805ROADKING]

Thanks alot, we appreciate your comment!!☺