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Sears red jack modification

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Old May 20, 2010 | 11:57 PM
  #121  
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macnab_sf
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Thanks guys, I bought the jack and bolts and did the mod. As soon as my shocks get here I'll have good reason to lift the bike. (and take a pic)
 
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Old May 21, 2010 | 12:26 AM
  #122  
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I have this jack but I lowerd my bike with 11" progressives so I might still have trouble
 
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Old May 21, 2010 | 08:37 AM
  #123  
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Originally Posted by SC-Longhair
Grendel, there are better jacks out there but to be honest after performing this mod I'm pretty satisfied with the $120+$10 I spent on this jack so far.

From previous posts, don't lose your receipt incase the seals go bad.
Well, I went and bought the jack. $99 -- An 'online' special. Picked it up, put it together in about 15 minutes. Well, 15 minutes of trying to interpret the instructions and 15 minutes of wrenching. Not even.

So anyway, I'm reading the little booklet and it sez to purge the jack. Makes sense to me. I'm thinking, if air gets trapped in the bottle jack for whatever reason, it's gonna compress and blow the seals out, right? Air compresses, liquids can not compress. High School Physics. About the only thing I remember (except the good-looking babe that sat to my right).

So I get it all put together and remove the fluid (oil) fill plug. Why? Because I'm not real smart. And because the little booklet doesn't specify how to purge the jack. But it was my fault. I think it's called stupidity.

Anyway, removing the fill plug while the jack is upright causes the oil to spurt out, all over the place. Brilliant. So I remove the bottle jack after I went to the parts store and bought a gallon of hydraulic fluid. I only needed a few ounces, but they sell it by the gallon.

Removed the jack from the frame, laid the jack on its side, fill plug up, and filled and purged the jack.

The moral of this story (other than confirming that I'm not particularly bright) is that you probabaly should purge the jack, but do it on its side. Before you install it on the jack frame.

Know what, SC? Hydraulic fluid really likes to cling to stuff. Leaves a film, too.
 
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Old May 21, 2010 | 08:52 AM
  #124  
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Originally Posted by macnab_sf
Thanks guys, I bought the jack and bolts and did the mod. As soon as my shocks get here I'll have good reason to lift the bike. (and take a pic)
You saying you haven't tested it out yet? You have some serious self-control.

Originally Posted by Grendel4
Well, I went and bought the jack. $99 -- An 'online' special. Picked it up, put it together in about 15 minutes. Well, 15 minutes of trying to interpret the instructions and 15 minutes of wrenching. Not even.

So anyway, I'm reading the little booklet and it sez to purge the jack. Makes sense to me. I'm thinking, if air gets trapped in the bottle jack for whatever reason, it's gonna compress and blow the seals out, right? Air compresses, liquids can not compress. High School Physics. About the only thing I remember (except the good-looking babe that sat to my right).

So I get it all put together and remove the fluid (oil) fill plug. Why? Because I'm not real smart. And because the little booklet doesn't specify how to purge the jack. But it was my fault. I think it's called stupidity.

Anyway, removing the fill plug while the jack is upright causes the oil to spurt out, all over the place. Brilliant. So I remove the bottle jack after I went to the parts store and bought a gallon of hydraulic fluid. I only needed a few ounces, but they sell it by the gallon.

Removed the jack from the frame, laid the jack on its side, fill plug up, and filled and purged the jack.

The moral of this story (other than confirming that I'm not particularly bright) is that you probabaly should purge the jack, but do it on its side. Before you install it on the jack frame.

Know what, SC? Hydraulic fluid really likes to cling to stuff. Leaves a film, too.
LOL Sorry to hear about that lil mishap Grendel. I'm sure a little degreaser will clean it right up. (carb or brake cleaner)
 
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Old May 21, 2010 | 04:25 PM
  #125  
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The first time I used the jack, on a Triumph, I didn't understand the directions either. I figured using the strap to hold the bike steady would be pretty important so I strapped it down before I lifted it. Of course only to find it wouldn't jack but a little teeny bit cause the strap was holding it down. Sometimes I'm not to good with Chinese instructions.
 
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Old May 21, 2010 | 04:34 PM
  #126  
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Originally Posted by Dale_K
The first time I used the jack, on a Triumph, I didn't understand the directions either. I figured using the strap to hold the bike steady would be pretty important so I strapped it down before I lifted it. Of course only to find it wouldn't jack but a little teeny bit cause the strap was holding it down. Sometimes I'm not to good with Chinese instructions.
Do you want to lose your man card? You can't go around admitting in public that you read instructions.....
 
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Old Jun 16, 2010 | 08:16 PM
  #127  
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thanks, I just bought mine. Sale this week fathers day $89.99.
 
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Old Jul 26, 2010 | 02:10 AM
  #128  
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Originally Posted by Grendel4
A Grade 2 Bolt 3/8" diameter has a shear strength of 830 lbs on the bolt body and 510 lbs at the thread root. A 1/2" Grade 2 bolt is 1470 and 940. Per bolt.

I think you're safe.

Sears has that jack on sale through today, online. Seriously considering it.
Sure the bolts are tough but Id still consider equaling the length of the spacers so the force on the left and right channels are the same. The long spacer will apply additional leverage to the channel and may eventually cause distortion on that tubing.
 
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Old Jul 26, 2010 | 09:19 PM
  #129  
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Thanks Vic, I have the exact lift. I'll be modifying it this weekend.
 
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Old Aug 7, 2010 | 12:52 AM
  #130  
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Default lift modification stage II

Just picked up one of these Sears lifts on CL for $66. Inspired by Vic's mods, I have added what I believe to be an important safety feature. Moving the supports outboard creates a cantilevered load, heavily stressing the new longer bolts. So I have installed a new "spreader bar" to stabilize the top channels.

The photos show how the original short bolts create a simple, closely supported load w/o cantilever, and how the new longer grade 8 bolts introduce a greater bending moment. To allow more safe load-carrying capacity, I have installed a 7/8" solid 1018 steel bar which goes all the way through both top channels, preventing sagging of the channels. I drilled new holes through the inner channel legs, offsetting them as far as possible to allow for minimum lowered height. Cost was $11 for the round bar plus welding. Space between the channels was sized to allow room for a flat washer between upper and lower channels. Also I removed the tie-down strap loops at one end (as shown) since the strap hooks can interfere w/ lowering, and the straps can easily be hooked under the lift frame itself.
 
Attached Thumbnails Sears red jack modification-mc-lift-011n.jpg   Sears red jack modification-mc-lift-012n.jpg   Sears red jack modification-mc-lift-015n.jpg   Sears red jack modification-mc-lift-009n.jpg   Sears red jack modification-mc-lift-017n.jpg  


Last edited by lo-rider; Aug 7, 2010 at 12:55 AM.
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