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cherry picker engine hoist question #3000316
12/31/21 02:49 PM
12/31/21 02:49 PM
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Lincoln Nebraska
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RapidRobert Offline OP
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the Pittsburg hyd jack (harbor freight) takes dozens of pumps to get it up, is it OK to leave it up in between jobs? thank you for your time. RR


live every 24 hour block of time like it's your last day on earth
Re: cherry picker engine hoist question [Re: RapidRobert] #3000327
12/31/21 03:11 PM
12/31/21 03:11 PM
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South Lyon, MI.48178
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kwhmopar1 Offline
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I am going to say NO. Unless you have some way of supporting the boom, so the weight is off the cylinder. I don't trust any hydraulic device for holding weight for any length of time. Best bet, be safe.


Junk is something you throw away just before you need it.
Re: cherry picker engine hoist question [Re: RapidRobert] #3000333
12/31/21 03:17 PM
12/31/21 03:17 PM
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Florida STAYcation
dOc - 3.0 ! Offline
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Originally Posted by RapidRobert
the Pittsburg hyd jack (harbor freight) takes dozens of pumps to get it up, is it OK to leave it up in between jobs? thank you for your time. RR


RR ... how far does the ram move ... say for 6 strokes ?

Re: cherry picker engine hoist question [Re: dOc - 3.0 !] #3000341
12/31/21 03:41 PM
12/31/21 03:41 PM
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I don't like to tax the seals, so if I don't want to collapse the ram I support the boom.
My old HF cherry picker is also slow to pump up, been that way for 20+ years and I've used it a fair amount that way.

Re: cherry picker engine hoist question [Re: topside] #3000360
12/31/21 04:19 PM
12/31/21 04:19 PM
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Taxing seals ? ... I have a couple of motorcycle jacks that have supported two bikes for going on two years !

Also have a Hobo Fright cherry picker that is collapsed now ... but had supported a short block in the air for about a month

Re: cherry picker engine hoist question [Re: dOc - 3.0 !] #3000365
12/31/21 04:49 PM
12/31/21 04:49 PM
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Buford, GA
I_bleed_MOPAR Offline
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Hmmm.... I replaced the jack on my engine hoist several years ago with a HF Pittsburgh jack. Seems to work as well as as the old one and doesn't require an excessive amount of pumps. Maybe I got lucky. shruggy
And I have never left an engine dangling on a hoist, at home or at work. I just don't trust them. wink


Tim


'71 Charger 383/727
'17 Challenger SXT (Wifeys car wink )
Re: cherry picker engine hoist question [Re: I_bleed_MOPAR] #3000368
12/31/21 04:58 PM
12/31/21 04:58 PM
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I just let the short block dangle maybe 8 inches above a junk tire ... just to see if it leaked with a load ...

No problem... up

Re: cherry picker engine hoist question [Re: dOc - 3.0 !] #3000491
12/31/21 10:41 PM
12/31/21 10:41 PM
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Fresno, CA
Jim_Lusk Offline
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Mine (from Kragan/O'Reilly's several years ago) will slowly go down so I never leave anything hanging. I also don't want any part of the piston exposed to moist air very long. Best to keep it down to avoid rust and most loss of seal.

Re: cherry picker engine hoist question [Re: RapidRobert] #3000494
12/31/21 11:04 PM
12/31/21 11:04 PM
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Atlanta, GA
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mgoblue9798 Offline
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I would not leave the cylinder extended. Leaves it exposed so it can possibly rust, then the rust screws up the seals.

Re: cherry picker engine hoist question [Re: mgoblue9798] #3000561
01/01/22 09:43 AM
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Tulsa OK
Bad340fish Offline
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I have a northern tool hoist(it sucks because the front wheels don't swivel) and when it is all the way down I can just lift the boom up and it will catch it. You have to lift it pretty far past the height you want or do it twice but it is way way better than pumping that whole distance. This obviously doesn't work with a load.

A friend of mine has the best cylinder for his and I need to replace mine with it. It pumps on the up an down stroke so if you are moving an engine from the ground to stand or install height its super fast. Its the only one I have seen that way and it is awesome.

Last edited by Bad340fish; 01/01/22 09:43 AM.

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Re: cherry picker engine hoist question [Re: Bad340fish] #3000579
01/01/22 11:27 AM
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I have a gantry crane I built, uses a chain hoist, though I could put one of those 110v electric hoist on if I wanted. It was built to clear the ceiling support beam in my garage. It can be built taller for the same cost. No need to pump anything on it.

https://board.moparts.org/ubbthread...mber/397808/filename/20200620_143804.jpg

Re: cherry picker engine hoist question [Re: Sniper] #3000585
01/01/22 11:59 AM
01/01/22 11:59 AM
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Lincoln Nebraska
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RapidRobert Offline OP
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Alright I will start letting it down (I need the exercise anyway). thanks guys. RR


live every 24 hour block of time like it's your last day on earth
Re: cherry picker engine hoist question [Re: RapidRobert] #3000626
01/01/22 01:42 PM
01/01/22 01:42 PM
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I’ll have to take a pic of a small bottle Jack I used to support an overhang of my truck camper that I used for years .....

Outside .... in the snow and rain and humidity... partially extended .....

It’s got some rust “stains” on it but it’s works fine ...and never leaked or dropped an inch ...

Re: cherry picker engine hoist question [Re: kwhmopar1] #3000802
01/01/22 07:44 PM
01/01/22 07:44 PM
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Looking for a way out of Middl...
IMGTX Offline
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I always lower the boom because with the boom up the machined portion of the portion of the ram shaft is exposed to air, moisture and eventually rust.

I know this because I loaned my best hoist to a friend who stored it boom up for a while. I went over to get it and found the shaft rusted. mad

Luckily I was able to polish it enough still use it but if the pits had gotten deeper it would have been junk.

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