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Old 09-14-2019, 05:06 PM   #1 (permalink)
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teach a goober about nboom lift extension cylinders or Lucas hydraulic stopleak

So today's culprit is a 90's(?) Snorkelift tb60 boom lift. For the last few years the telescoping/extension cylinder has been dripping slowly but it's been getting worse and coming up on unusable. Information is just about unavailable on these things so has anyone ever pulled the cylinder to rebuild it? The one video I've found shows them pulling the whole boom which doesn't sound fun. Any knowledge or experiences would be very appreciated.

If it is going to be a real pain in the ass has anyone used the Lucas hydraulic stopleak? My machine has a 30 gallon tank so if I can get this thing serviceable with 3 gallons at ~$30 each I'll happily go for it.
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Old 09-14-2019, 05:18 PM   #2 (permalink)
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Post a pic of the part of the boom and cylinder. I rebuilt the extension boom cylinder on my Lull (had never done one before) it was 14'-8" long, had to move a few things and slide it out the back of the boom. Sometimes the ends can be stubborn to get off but with some ingenuity it can be done. If you can find a dealer or aftermarket to get the seal kit, that's half the battle.

ETA: try here: https://www.heavyequipmentforums.com/
https://www.webequipment.com/telehandler-seal-kits/

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Old 09-14-2019, 06:59 PM   #3 (permalink)
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If it's leaking out the wiper seal, you're not going to fix it with stop leak...

Physics.
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Old 09-14-2019, 07:02 PM   #4 (permalink)
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Pull the cylinder. The gland seal is shot and needs to be replaced. Once it's out you can measure it and match it up. I've ordered a bunch from McMaster.
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Old 09-14-2019, 09:11 PM   #5 (permalink)
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Quote:
Originally Posted by 69DieselLover View Post
If it's leaking out the wiper seal, you're not going to fix it with stop leak...

Physics.
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Pull the cylinder. The gland seal is shot and needs to be replaced. Once it's out you can measure it and match it up. I've ordered a bunch from McMaster.
This. its very likely a very cheap seal.

If its just dripping out where the ram exits the cylinder its the wiper seal or gland seal.

If you could post a pic of the cylinder where the rod comes out so we can all judge how easy it will be to take apart.

if your in a large city or near one there is a very high chance that there is a hydraulic shop that will match up seals for you. For my territories (tulsa and spring dale) i use crown products in tulsa and precision in springdale.
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Old 09-15-2019, 06:03 AM   #6 (permalink)
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if those didn't embed, here's a link: https://imgur.com/a/nVQ6Qlf

rebuilding the cylinder would be the easy part, i have a guy that's pretty local who's prices are so good we dont even bother doing it ourselves anymore. getting it out will be the shit part as it's 20' long and completely enclosed in the boom. last time we pulled a cylinder on this machine the pins were so seized it took a 60 lb jackhammer and backhoe to get one to move

what i'm really looking for is anecdotal experiences that'll either convince me to tear into it or to go to tractor supply and drop a hundred bucks on snake oil
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Old 09-15-2019, 06:21 AM   #7 (permalink)
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if those didn't embed, here's a link: https://imgur.com/a/nVQ6Qlf

rebuilding the cylinder would be the easy part, i have a guy that's pretty local who's prices are so good we dont even bother doing it ourselves anymore. getting it out will be the shit part as it's 20' long and completely enclosed in the boom. last time we pulled a cylinder on this machine the pins were so seized it took a 60 lb jackhammer and backhoe to get one to move

what i'm really looking for is anecdotal experiences that'll either convince me to tear into it or to go to tractor supply and drop a hundred bucks on snake oil
Pull the cylinder, stop leak wont do shit.
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Old 09-15-2019, 06:44 AM   #8 (permalink)
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Nice spread, nice fence, nice driveway, freshly mown drainage, clean old boom lift, Goober needs to spend some moldy money and fix his shit or skip the lucas and dump a quart of dot3 in your hydraulic tank.
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Old 09-15-2019, 07:57 AM   #9 (permalink)
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The gland seal is breaking apart from age. No stop leak snake oil in the world will fix it. It's not a simple gasket your trying to swell, it's a mechanical part that uses pressure to seal on the rod.

I've got an atlas crane sitting here that needs the extend cyl rebuilt that I'm not looking forward to doing.
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Old 09-15-2019, 11:35 AM   #10 (permalink)
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Nice spread, nice fence, nice driveway, freshly mown drainage, clean old boom lift, Goober needs to spend some moldy money and fix his shit or skip the lucas and dump a quart of dot3 in your hydraulic tank.
That wont work..its a plastic like seal not rubber.


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The gland seal is breaking apart from age. No stop leak snake oil in the world will fix it. It's not a simple gasket your trying to swell, it's a mechanical part that uses pressure to seal on the rod.

I've got an atlas crane sitting here that needs the extend cyl rebuilt that I'm not looking forward to doing.
hardest part is getting it apart.

Me and my coworker gotta pull the one in boom 3 this week
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Old 09-15-2019, 01:13 PM   #11 (permalink)
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That wont work..its a plastic like seal not rubber.




hardest part is getting it apart.

Me and my coworker gotta pull the one in boom 3 this week
Looks fun. I figure if your fixing that you have support equiptment to assist pulling it.

This thread gave me a bit of motivation to go work on the atlas crane. Tired to remove the pin that's been in place since 1987, it said fuck off. Going to need a press welded to it.
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Old 09-15-2019, 04:41 PM   #12 (permalink)
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Sounds like I'll skip the Lucas stuff and let it drip for the time being. Oils cheap and this machines lucky to see 10 hours of use a year so I'll just tape up a diaper underneath it and rock on for the time being
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Old 09-15-2019, 06:18 PM   #13 (permalink)
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It's not just the leak you need to worry about. I would bet the packing seal is wore out and starting to crumble. So fluid will start to bypass and not lift.

Worst case scenario, the bucket drops down with someone in it.
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Old 09-15-2019, 08:26 PM   #14 (permalink)
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Looks fun. I figure if your fixing that you have support equiptment to assist pulling it.

This thread gave me a bit of motivation to go work on the atlas crane. Tired to remove the pin that's been in place since 1987, it said fuck off. Going to need a press welded to it.
your right..not all the equipment but we find a way.


Based on the stuff ive seen you build you might already know this but...if you get a porta power put a fitting where the grease zerk is on the pin or eyelet or however i takes grease you can slowly pressurize if to push the gunk out..its messy and it might also push the pin out. or it might just find the easiest path and bypass all the fun

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It's not just the leak you need to worry about. I would bet the packing seal is wore out and starting to crumble. So fluid will start to bypass and not lift.

Worst case scenario, the bucket drops down with someone in it.
That is true, based on the photos you could rebuit it within the unit.

loosen lines let them bleed off. if it has holding valves loosen til they leak down to a drip then remove.

If you cant get to the lines or the holding valve...your fucked. If the ram is under pressure and you remove the cap down below the rod could shoot out. If not when you put it together with new seals your not gonna be able to put it together

i use this tool

https://rocklinhydraulics.com/2-to-6...nd-nut-wrench/

Any of the spanners will work on this page
https://rocklinhydraulics.com/hydraulic-repair-tools/

there likely going to be a keeper wire. in the cap. find the slot in the top of the ram use a pick to guide the keeper wire up keep spinning til it fall out. or if it binds like a dead stop back it up a bit and pull the wire up and out.

once the wire falls out pull on the eyelet in the ram. Then the plunger should push out the cap. There will be a nut on the end of the ram rod, take it off. Most are lock nuts some are loctited.

Reseal then put back together.
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1967 F250: Restomod
1998 f150 reg cab, swb, 4x4 5.4
2013 Yamaha fz8
2015 jetta
And 2 more

Last edited by A_G; 09-15-2019 at 08:32 PM.
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