under car safety

grumpyvette said:

wow could I sure use one of these little tools, if the price is even semi reasonable that looks like a fine addition to any mechanics tools!

Now that's cool!!
"GRUMPY? I just bought a set of those 12 ton jack stands and I see a paper with instructions that says to bend in the tab in the side.
Why is this important?

good floor jack
simply place a socket extension on the tip of the tab after inserting the center support and give it a good hit with a 3 LB hammer the bent tab prevents the jack stand components separating if you try to move it holding the upper support
THAT bendable tab keeps the center support from pulling out of the base of the jack stand and leaving the base on the floor when you pick them up to move the jack stand by the top.
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I bought 4 of these about 7 years ago , 3 of the 4 still work OK, one leaks hydraulic fluid so I need to get it repaired or repair it.



I purchased a set of these to make it easier to move my corvette that is not up on jack stands around the shop, they work fairly well, allowing you to push the car in any direction once the cars up on the 4 car skates, but Ive had them on the car for well over 7 years and I went to remove them and one of the four had the hydraulic cylinder fail over that time making removing the car skate a p.i.t.a.
now when you have spent several hundred dollars on a tool and used it once and go to use it again the second time and find it won,t work... well to say i was PISSED OFF, would be an understatement... but I figure what ever failed can,t be that complicated to fix , after all its only been sitting in a nice dry shop.




once the cotter pins removed from the end of the pivot pin holding the lever the spring and its cover can be lifted off the 3/4" six sided hydraulic sleeve cylinder that can be easily unscrewed, once thats removed the long cylinder like piston can be easily pushed out of the bottom where you'll see the defective O-RING that needs to be replaced, its approximately the same size as the O-rings on fuel injectors but take the old one to a local hydraulic supply or auto parts with a good o-ring selection if you don,t have a selection of o-rings in your shop supplies, slipping on a new o-ring and refilling the hydraulic cylinder was all that was required.
the screw plug to the hydraulic oil supply access was a flush screw in the base youll see easily during any inspection once the car jacks inverted,
so the bottom line here is its a very easy repair and under $1 to fix , but a P.I.T.A. to find its not working

the hydraulic car skates



yes you obviously need a quart of hydraulic jack oil, in addition to the replacement oil , plunger O-ring

http://www.autozone.com/autozone/access ... 13803_0_0_

http://www.grainger.com/Grainger/LIQUID ... Pid=search

and yes pouring it in the small access ports, or filling the jack is made far easier of the oils first poured into a oil squirt can

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At $100 each, you must of had a good reason for purchasing this style of dolly? Why these instead of the other style where you jack up the car and then place the dolly under the wheels?

the hydraulic car skates







these are a bit harder to use and smaller but less likely to require maintenance and they are cheaper



make it easy to pull a corvette into the shop, and just slide a car skate on each wheel, ,you then pump up the cylinder that closes the two parallel roller bars , lifting the tire off the ground, letting the 4 swivel casters on each car skate allow the car to be pushed in any direction.
once you get to working on a car theres lots of times that the ability to push it to a different location while the engine or transmission are not 100% functional, becomes an asset.
keep in m ind the other (cheaper ) type floor skates, require use of a separate floor jack, and the ones Ive seen that a buddy purchased at HF, are not built nearly as strong from what I,ve seen, and remember corvettes are generally so close to the floor that many floor jacks won,t clear the frame unless you first drive the corvette up on a small floor ramp, and you can,t remove the floor jack unless you place spacers or ramps under the tires (Ive got 4 double thick 3/4" 12"x12" square sections of plywood I put under the corvette tires at times just too get the required floor jack clearance.)
in fact I bought the ones I did only after seeing, how useful they were in use at, a friends, he had used a set in use in his shop, for over a year, and they were working so well, it made moving his second project car simple.
and after seeing the other type bend , at a second guys shop under his project pick-up truck and obviously being stressed to the point they looked about to fail
(they did,nt fail but were obviously bending under load)
http://compare.ebay.com/like/4003532189 ... s&var=sbar



in fact that lack of easy floor jack clearance has had several of my friends build a couple of shallow ramps that they use in their shops that look like this


depending on what your goals are you might consider a car rotisery











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Well if you were into TBuckets, then the weight (1800 lbs) or ground clearance
would not be a problem. Oh well it's too late now for you to change directions! :D

trust me when I say building and working on a T-bucket, or similar cars,
where you can easily access the components,
has a real strong appeal, and many times I wish Id gone that route
......frequently :D

I suspect you may have dreamed about ... LOL

Right after you dreamed about that other subject. :lol:
HELL, IM MALE I spend the vast majority of my dream time thinking about the same basic thing most guys do....and its mostly a subject thats always getting us into trouble and costing us money, and proving we don,t always think logically, but I,m hardly unique in that reguard



http://www.harborfreight.com/2-ton-capa ... 41860.html
HF PART NUMBERS 41860 or 60759... these come in very handy during exhaust system fabrication

http://www.harborfreight.com/underhoist ... 60759.html

This underhoist safety stand provides an extra point of support while working on exhaust systems, struts, transmissions and engine mounts. The wide stable base and precise adjustment on this transmission stand lets you support components during removal and replacement.
http://www.webriggingsupply.com/pages/c ... hooks.html
http://www.machinerylubrication.com/Vie ... grease-gun
All steel construction
Six height adjustments
Fine screw adjustment
Large 3-1/8" x 4-1/2" saddle
Sturdy tripod base

Name Underhoist Safety Stand
SKU 60759
Brand Pittsburgh Automotive
Capacity 4000 lb.
Maximum height (in.) 93-1/2 in.
Minimum height (in.) 49-3/4 in.
Product Height 49-3/4 in.
Product Length 24 in.
Product Width 24 in.
Jack recently started fabricating a custom exhaust for his car and while he had access to both a friend of his shop with a good mig welder and a two post lift to make the job much easier, he did not have two of the tall support jacks that come in so handy when doing that type of work.
well harbor freight has them listed (I bought two of these about 9 years ago for my shop) I offered to loan him mine but he decided it might be better to have two he owns personally as it gave him as good excuse to buy them and he fully intends to get a lift in his garage in the future.
I helped him assemble those two stands and I don,t remember the ones I purchased being that difficult, Id strongly suggest you read the instructions carefully and remember to install the assembly bolts only very loosely in ALL LOCATIONS allowing a small amount of flexibility during the assembly process, because getting all the braces, and bolts in place , in the tall support stand if any of the bolts in place are tightened,becomes a huge P.I.T.A. if they are tight, which makes the assembly process much more difficult.
yes these stands come in very handy at times if you own a lift in your shop, and yes I recommend you get two .
BTW theres three of the bolts that are 25mm and the rest are 20mm length the three are for the upper triangular plate and youll need a 17mm wrench and 17mm ratchet and socket or second 17mm wrench.
and don,t forget to grease the bearing and screw threads with a good coat of MOLY grease it makes it far easier to use

Oh my God Rich.
I can't believe.....
Yes its real.
I don't know ....
Rather work on my back.
Even Dirt Ground.
No worries then of being crushed.
87vette81big said:
Oh my God Rich.
I can't believe.....
Yes its real.
I don't know ....
Rather work on my back.
Even Dirt Ground.
No worries then of being crushed.

Why would you say that? These stands would be great for long term use (perhaps freeing up a lift)- at the lowest setting would be great for body work. There must be a crane used to lift that truck high enough.
if your interested in installing lift pads on your cars frame to prevent the floor jack or two post auto lift arms from scratching the frame on your car, heres a rather interesting option I found posted. you could also use these RUBBER PADS on some floor jacks or jack stands, especially if you fabricate adapter plates if needed.

C3C6 Norm said:

I was rather impressed when I saw this idea
as the idea of car skates , or wheel dollies

to allow moving a car in the shop has always been very useful.
the idea of wood supports is also good


these castors would support 600 lbs EACH so 4 under a double thick 3/4" 18"x18" platform base with the proper tire support would easily handle the weight of the corvette or muscle car as each should, in theory support 2400 lbs with zero issues, giving a decent safety margin at 9600 lbs for four castor platforms under the four wheels, and at roughly 9" tall even before you bolt a support stack of 2x4 over the (4) double thick 18"x 18" plywood bases it would be a great shop tool ... yeah ! obviously the cost of about $320 for the 16 casters is a bit high but they have 20% discount sales all the time


the idea of combining the two concepts too make a safe car support ,thats high enough too safely use a mechanics creeper with, seems like a good idea, other than the cost of course, but Id feel far safer, using the 4 larger wheel ,heavier duty rated casters , than with the caster platforms as pictured above

btw while its not aluminum its a decent floor jack for the price especially if you get the 20% off discount ticket price.

http://www.harborfreight.com/6-inch-x-2 ... 41565.html

This durable swivel caster is made of high quality rubber for maximum absorption, cushion load and pressed steel double ball bearings for extended service life. The heavy duty design makes this caster ideal for carts used in restaurants, schools and hospitals.

High quality solid rubber tire bonded to a polypropylene core
600 lb. load rated
Double ball bearing axle
Zinc plated steel yoke and plate

Name 6 in. Heavy Duty Swivel Caster
SKU 41565
Brand Central Machinery
Brake No
Material Rubber, steel
Maximum Working load (lbs.) 600 lb.
Mounting type Plate
Quantity 1
Swivel base (deg) 360°
Wheel thickness (in.) 2 in.
Fits tire size (in.) 6 in.
Product Height 7-1/2 in.
Shipping Weight 6.10 lb.
Tire size (in.) 6 in.
Warranty 90 Day

When shopping for a floor jack it really pays too, always read the tools sales description,s very carefully
I would strongly suggest you ,look for a minimum rated lifting capacity of 2 tons with 2.5-3 tons being a big plus factor,
look for a maximum lowered height of no more than 3.75" tall,
to allow easy access to the lower car frame heights on cars like corvettes, and it should have a full lift height exceeding 22"

to allow you to use the much more stable wide base 12 ton rated jack stands, if you read carefully youll find the vast majority of floor jacks fail in one or both areas.
I used to worry about the floor jack lift quality , but its become all too obvious most jacks, that are even semi reasonably priced (under $300) are re-branded imports , so in the price range most of us are likely to be shopping in, your looking for good used commercial floor jacks or imported floor jacks ,so carefully inspect what you intend to buy and look for sales or discount coupons, and shop locally you don,t want to pay an extra $100 in shipping charges or have a jack arrive damaged, that needs to be returned.
the jacks linked below are not light weight aluminum, but they seem reasonably priced and may be functional


http://www.harborfreight.com/12-ton-jac ... 34924.html


certainly not your only choices but there are a few here



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my corvette is MUCH lower than this z06 so i would require the longer ramps but those "wheel cribs" are ideal wether you make them from 2x4 or buy them to bring the ass of the car up and make the car level again.

i wouldnt recommend using ramps and having the rear tires on the ground with the car at such an extreme angle.


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