Quick Jack issue...
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2010
Posts: 13,583
Likes: 1,046
From: Boulder Creek, CA
Quick Jack issue...
Got it filled, and bled, no more air is in the cylinders..not a peep. The pump is bled...checked that too, and it's full.
This is a 7000lb unit, and it wont raise to the first stop, the pump sounds like its hit a hard stop just before it.
Ideas???
This is a 7000lb unit, and it wont raise to the first stop, the pump sounds like its hit a hard stop just before it.
Ideas???
Three Wheelin'
Joined: Feb 2004
Posts: 1,748
Likes: 357
From: St. Augustine, FL
This is going to sound stupid but are you plugged directly into the wall or into an extension cord? I am pretty sure I had this issue on a weak extension cord.
Also, you might check the reservoir fluid level after bleeding as your reservoir may be low. This video has other ideas too.
Also, you might check the reservoir fluid level after bleeding as your reservoir may be low. This video has other ideas too.
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2010
Posts: 13,583
Likes: 1,046
From: Boulder Creek, CA
Ya..its PLENTY full, added another 1/4" to the top just in case, no difference.
I thought about that pump 'adjustment' I see here (saw a few hours ago) but...thought Id just wait for QJ in the morning...not the same pump, but should work.
Its on a cord, but my pressure washer draws more than this does, I cant imagine it needs more. But..I can try.
I thought about that pump 'adjustment' I see here (saw a few hours ago) but...thought Id just wait for QJ in the morning...not the same pump, but should work.
Its on a cord, but my pressure washer draws more than this does, I cant imagine it needs more. But..I can try.
Rennlist Member
Joined: Nov 2006
Posts: 14,883
Likes: 2,802
From: Pittsburgh, PA
My strongest advice is do not stack those blocks! See this thread - https://rennlist.com/forums/997-foru...-jack-psa.html. I know QJ allows for it, but I could have been killed. In the case of the 928, the extra couple of inches in the grand scheme is meaningless.
Other than that, I don't know why yours isn't lifting? (Maybe God giving you a second chance to unstack those blocks before you get under it?
)
Other than that, I don't know why yours isn't lifting? (Maybe God giving you a second chance to unstack those blocks before you get under it?
)
Rennlist Member
Joined: Aug 2005
Posts: 10,678
Likes: 544
From: I should be in TNT for Carnival!
Get car off and bleed it again, raise and lower it a couple times but NOT all the way up. See if that works, if no luck, give them a call. GL I always use an extension cord without issue.
Rennlist Member
Joined: Jan 2008
Posts: 4,077
Likes: 331
From: Friday Harbor, WA
Jeff,
Watching (and listening to) your video, the motor keeps running when the lift stalls, so it is not electric-- whatever your extension cord is, is fine. I don't hear the motor RPM change so it is still pumping fluid (or trying to) under pressure but the fluid is not getting to the cylinders.
So either a pressure-relief valve is opening early (and the fluid is bypassing the cylinders), or the pump piston/vanes/whatever are not sealing and the pump is not able to build enough pressure.
Check Trey's video above, the pressure-relief o-rings are a likely culprit. (The pressure switch on top is not the culprit, that would stop the motor).
Watching (and listening to) your video, the motor keeps running when the lift stalls, so it is not electric-- whatever your extension cord is, is fine. I don't hear the motor RPM change so it is still pumping fluid (or trying to) under pressure but the fluid is not getting to the cylinders.
So either a pressure-relief valve is opening early (and the fluid is bypassing the cylinders), or the pump piston/vanes/whatever are not sealing and the pump is not able to build enough pressure.
Check Trey's video above, the pressure-relief o-rings are a likely culprit. (The pressure switch on top is not the culprit, that would stop the motor).
Last edited by jcorenman; Jul 14, 2021 at 11:12 AM.
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2010
Posts: 13,583
Likes: 1,046
From: Boulder Creek, CA
Ya..went to bleed more..no air.
The lift even with no load, only goes up 2/3 to the first stop, barely the 8-9" raise they want to cycle/bleed the system...Just wont go higher.
Also, even with no load, and -3- cycles, the pump is HOT, the fluid tank is hot...that's not normal. It should be barely working, much less generating 100s of watts of heat in the mass of the body and fluid after 3 cycles.
The lift even with no load, only goes up 2/3 to the first stop, barely the 8-9" raise they want to cycle/bleed the system...Just wont go higher.
Also, even with no load, and -3- cycles, the pump is HOT, the fluid tank is hot...that's not normal. It should be barely working, much less generating 100s of watts of heat in the mass of the body and fluid after 3 cycles.
Trending Topics
Former Vendor
Joined: Feb 2005
Posts: 15,228
Likes: 2,529
From: Anaheim
Ya..went to bleed more..no air.
The lift even with no load, only goes up 2/3 to the first stop, barely the 8-9" raise they want to cycle/bleed the system...Just wont go higher.
Also, even with no load, and -3- cycles, the pump is HOT, the fluid tank is hot...that's not normal. It should be barely working, much less generating 100s of watts of heat in the mass of the body and fluid after 3 cycles.
The lift even with no load, only goes up 2/3 to the first stop, barely the 8-9" raise they want to cycle/bleed the system...Just wont go higher.
Also, even with no load, and -3- cycles, the pump is HOT, the fluid tank is hot...that's not normal. It should be barely working, much less generating 100s of watts of heat in the mass of the body and fluid after 3 cycles.
The one where you pay for it to not work.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)
Joe Kucinski
Porsche Shakes Up The Nürburgring Lap Record Table Once Again
Verdad Gallardo
6 Ways the Porsche 911 GT3 S/C Redefines Performance
Joe Kucinski
10 Wildest Homologation Specials Porsche Ever Sold
Verdad Gallardo
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home
Verdad Gallardo
10 Porsche Opinions That Can Start a Fight
Joe Kucinski
Rennlist Member
Joined: May 2002
Posts: 9,250
Likes: 1,325
From: Roswell, GA
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2010
Posts: 13,583
Likes: 1,046
From: Boulder Creek, CA
Well, they said to raise the pressure on the valve 1/4 turn, I did. Not much has changed.
Although I did end up with one side of the car up on a lock, and the other side still cant get 2/3 to it..and the pump start to 'groan'..
This is the most frustration per technological effort Ive even spent in my garage.
One pump, two hydraulic cylinders, zero changed since 1738.
Although I did end up with one side of the car up on a lock, and the other side still cant get 2/3 to it..and the pump start to 'groan'..
This is the most frustration per technological effort Ive even spent in my garage.
One pump, two hydraulic cylinders, zero changed since 1738.
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2010
Posts: 13,583
Likes: 1,046
From: Boulder Creek, CA
This is going to sound stupid but are you plugged directly into the wall or into an extension cord? I am pretty sure I had this issue on a weak extension cord.
Also, you might check the reservoir fluid level after bleeding as your reservoir may be low. This video has other ideas too.
https://www.youtube.com/watch?v=9rUgOcF7zrM
Also, you might check the reservoir fluid level after bleeding as your reservoir may be low. This video has other ideas too.
https://www.youtube.com/watch?v=9rUgOcF7zrM
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2010
Posts: 13,583
Likes: 1,046
From: Boulder Creek, CA
After swapping hoses and fittings side to side..the last thing they had me do was see if there's fluid in the air chambers...
The slow not lifting side, is full of it...*sigh*
Well, when I get back from a funeral on Tuesday, I hope to have a new cylinder to bolt in...I hope.
The slow not lifting side, is full of it...*sigh*
Well, when I get back from a funeral on Tuesday, I hope to have a new cylinder to bolt in...I hope.
Rennlist Member
Joined: Aug 2005
Posts: 10,678
Likes: 544
From: I should be in TNT for Carnival!
Got it filled, and bled, no more air is in the cylinders..not a peep. The pump is bled...checked that too, and it's full.
This is a 7000lb unit, and it wont raise to the first stop, the pump sounds like its hit a hard stop just before it.
Ideas???
https://www.youtube.com/watch?v=frUhFNCnsKA
This is a 7000lb unit, and it wont raise to the first stop, the pump sounds like its hit a hard stop just before it.
Ideas???
https://www.youtube.com/watch?v=frUhFNCnsKA
I've the same 7000 unit, and it never makes that sound. I could lift my Cayenne with ease.
Have you sent that video to QJ?
Instructor
Joined: May 2017
Posts: 107
Likes: 41
- I'm going to second against stacking the blocks.
- I've had a few close calls with just the taller blocks with the car shifting and on one occasion shifting off the block, but still on the rack.
- now I only use the stubby blocks
- I've had a few close calls with just the taller blocks with the car shifting and on one occasion shifting off the block, but still on the rack.
- now I only use the stubby blocks
