Home » Public Forums » GMCnet » Re: [GMCnet] Need a suggestion for a jack to carry
| Re: [GMCnet] Need a suggestion for a jack to carry [message #84688] |
Sat, 15 May 2010 09:51  |
KB
Messages: 1262
Registered: September 2009
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I've asked this question before when I had the bad experience with the OEM jack, and the answers were inconclusive.
Not to dismiss their usefulness, the problem with the jack hook is:
a) the slot at the front frame rail is not a blessed jack point re: the GMC manual's instructions on jacking.
b) some folks have apparently cracked their windshield by jacking only one side of the coach in front.
So I dunno -- think we need either a jack that can slide under the beast to the sanctioned center jack point even
with a flat, or maybe two hooks/jacks to raise both sides simultaneously.
Karen
1973 23' Patience Tester
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #84693 is a reply to message #84688] |
Sat, 15 May 2010 10:08  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Karen,
Here's my 2 Aussie cents worth - slightly less than 2 US cents at the
current exchange rate.
a) Correct - however it is in the area where the front clip bolts to the
long side rails making it "double" thickness and unlikely to be damaged.
b) Correct - however, take into consideration 1) the OEM jack did the same
thing when used in front of the bumper mount 2) you should only raising the
coach far enough to replace the tire (inch or so higher than the opposite
side) and I would think that wouldn't create enough stress to crack a
windshield.
I could be (and probably am) wrong!
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of KB
Sent: Sunday, 16 May 2010 12:52 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Need a suggestion for a jack to carry
I've asked this question before when I had the bad experience with the OEM
jack, and the answers were inconclusive.
Not to dismiss their usefulness, the problem with the jack hook is:
a) the slot at the front frame rail is not a blessed jack point re:
the GMC manual's instructions on jacking.
b) some folks have apparently cracked their windshield by jacking
only one side of the coach in front.
So I dunno -- think we need either a jack that can slide under the beast to
the sanctioned center jack point even
with a flat, or maybe two hooks/jacks to raise both sides simultaneously.
Karen
1973 23' Patience Tester
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #84731 is a reply to message #84693] |
Sat, 15 May 2010 17:20 |
Don A
Messages: 895
Registered: October 2008
Location: Dallas, TX
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b raising the frame an 1" or so won't get the tire off the ground. That's why I would prefer the lift the A arm, if I could get under it.
Don Adams Dallas, TX
'76 26' Glenbrook, '90 Sidekick
rebuilt by R Archer, powered by J Bounds, Koba
[IMG]http://www.gmcmhphotos.com/photos/data/6109/G2.jpg[/IMG]
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85134 is a reply to message #85131] |
Tue, 18 May 2010 15:56 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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I use a standard off-brand 10 ton hydraulic jack to lift the front of the coach. Use the two holes in the center of the crossmember as the locating point for the lift. Have jack stands at each corner to catch the coach. It can come down very fast. Do not allow the coach to remain on the hydraulic jack with out additional support. It can come down very fast. Short sections of 6 x 6 blocks can also perform the safety factor. Keep all parts of your body that you intend to use again out from under the coach, while it is supported only on the hydraulic jack.
Do not attempt to lift the coach by the small cross braces at the front diagonals. They will not take the load. Some P.O. bent mine.
Actually, I carry a 10 T hydraulic, 2 x 2 T hydraulic, 2 jack stands and a Al 3 T floor jack. And, lots of wooden blocking material.
Tom Phipps,
75 GMC
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85141 is a reply to message #85134] |
Tue, 18 May 2010 16:36 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Where do you store all this stuff?
Sent from my iPad
On May 18, 2010, at 1:56 PM, Thomas Phipps <tph1pp5@yahoo.com> wrote:
>
>
> I use a standard off-brand 10 ton hydraulic jack to lift the front of the coach. Use the two holes in the center of the crossmember as the locating point for the lift. Have jack stands at each corner to catch the coach. It can come down very fast. Do not allow the coach to remain on the hydraulic jack with out additional support. It can come down very fast. Short sections of 6 x 6 blocks can also perform the safety factor. Keep all parts of your body that you intend to use again out from under the coach, while it is supported only on the hydraulic jack.
> Do not attempt to lift the coach by the small cross braces at the front diagonals. They will not take the load. Some P.O. bent mine.
> Actually, I carry a 10 T hydraulic, 2 x 2 T hydraulic, 2 jack stands and a Al 3 T floor jack. And, lots of wooden blocking material.
>
> Tom Phipps,
> 75 GMC
>
> _______________________________________________
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85150 is a reply to message #85134] |
Tue, 18 May 2010 18:00 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| tphipps wrote on Tue, 18 May 2010 16:56 |
I use a standard off-brand 10 ton hydraulic jack to lift the front of the coach. Use the two holes in the center of the crossmember as the locating point for the lift. Have jack stands at each corner to catch the coach. It can come down very fast. Do not allow the coach to remain on the hydraulic jack with out additional support. It can come down very fast. Short sections of 6 x 6 blocks can also perform the safety factor. Keep all parts of your body that you intend to use again out from under the coach, while it is supported only on the hydraulic jack.
Do not attempt to lift the coach by the small cross braces at the front diagonals. They will not take the load. Some P.O. bent mine.
Actually, I carry a 10 T hydraulic, 2 x 2 T hydraulic, 2 jack stands and a Al 3 T floor jack. And, lots of wooden blocking material.
Tom Phipps,
75 GMC
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Tom,
My coach is a 23' and there is not a lot of storage.
All I want is to be able to get a front tire off without waiting 98 minutes for a guy to show up with a jack that almost didn't fit at all.
I want it to be able to lift the part with a truly flat tire high enough to bolt on the spare. A scissor jack will just about fit in the remaining tool storage.
I don't want to do anything under there. When at home, I pick up the rear by the bogie brackets with an 8000# car lift and the front with 3-ton floor jack and if I had a little more height under the joist, I could have lunch under there.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85158 is a reply to message #84688] |
Tue, 18 May 2010 19:16 |
Gail Marks Cruiser
Messages: 125
Registered: August 2009
Location: Gold Coast, Australia
Karma: 0
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G'day
We use the two jack system, one small screw jack (2 ton) to lift it enough to get the hydraulic jack under(5 Ton).The screw jack is then repositioned as a back-up, just in case. We have plenty of storage space. If you carry ramps or blocks of timber to level up, you can run the flat tire up on one of those to give you the height to get a jack under.If you real want to go over board, carry a small sheet of 5 ply or similar to put under the jack to spread the load on soft/muddy ground.
Mark Bennett
Gail & Mark's Cruiser
Gold Coast, Australia.
Motorhoming Lifestyle.com
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85204 is a reply to message #85158] |
Wed, 19 May 2010 07:16 |
druber
Messages: 58
Registered: March 2004
Location: Syracuse, IN
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Bontrager surplus has (had?) a squatty fat two stage Ford jack for $20 that
can get under the arm, and has plenty of capacity to lift the wheels off the
ground, front or rear. It's the only jack I carry. The Great Lakers have a
rally not too far from there this weekend, and someone will probably visit
them if you want one, or at least check for availability.
Druber
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Mark Bennett
Sent: Tuesday, May 18, 2010 8:17 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Need a suggestion for a jack to carry
G'day
We use the two jack system, one small screw jack (2 ton) to lift it enough
to get the hydraulic jack under(5 Ton).The screw jack is then repositioned
as a back-up, just in case. We have plenty of storage space. If you carry
ramps or blocks of timber to level up, you can run the flat tire up on one
of those to give you the height to get a jack under.If you real want to go
over board, carry a small sheet of 5 ply or similar to put under the jack to
spread the load on soft/muddy ground.
--
Mark Bennett
Gail & Mark's Cruiser
Gold Coast, Australia.
Motorhoming Lifestyle.com
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85228 is a reply to message #85204] |
Wed, 19 May 2010 10:49 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| druber wrote on Wed, 19 May 2010 08:16 |
Bontrager surplus has (had?) a squatty fat two stage Ford jack for $20 that
can get under the arm, and has plenty of capacity to lift the wheels off the ground, front or rear. It's the only jack I carry. The Great Lakers have a rally not too far from there this weekend, and someone will probably visit them if you want one, or at least check for availability.
Druber
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When there last October, I looked at one of those. At 15" tall, it would not fit under the lower control arm of a flat tire.
I used to have that measurement, but have recently misplaced it.
Thanks for the thought.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85256 is a reply to message #84688] |
Wed, 19 May 2010 12:44 |
philipswanson
Messages: 282
Registered: January 2004
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Since you typically can't carry one large jack to lift the whole front end of the coach, I carry two small hydraulic jacks. You should never jack up one corner of that coach unless you want to break a windshield. It won't break every time this way but sometimes will. If you are willing to take that chance, go ahead and jack up one wheel. I had it happen, so I know first hand. With two small hydraulic jacks on the front frame, you can alternate jacking to keep the stress off the one side and save a windshield. And yes, one inch off the roadway is plenty to crack that windshield right down the middle from bottom to top. Not all of them will crack, it depends on the distortion you set up in the body and the clearances between the glass frame opening and the glass. Forget bumper jacks, they are dangerous and can cause body damage.
Phil Swanson
77GMCPB
[Updated on: Wed, 19 May 2010 12:47] Report message to a moderator |
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85283 is a reply to message #85256] |
Wed, 19 May 2010 14:36 |
jw mills
Messages: 199
Registered: September 2006
Karma: -30
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I jack the front of mine by putting the jack under the A frame. If that
will break a wind shield then you better never drive the coach except on
perfectly flat roads and never allow just one wheel enter a pot hole or
ditch.
--
Jim Mills
Greeley, CO
1973 CanyonLands 260 TZE-063V100731(under renovation)
1973 Glacier 230 TZE-033V101993
On Wed, 2010-05-19 at 12:44 -0500, Phil Swanson wrote:
>
> Since you typically can't carry one large jack to lift the whole front end of the coach, I carry two small hydraulic jacks. You should never jack up one corner of that coach unless you want to break a windshield. It won;t break every time this way but sometimes will. If you are willing to ake that chance, go ahead and jack up one wheel. I had it happen, so I know first hand. With two small hydraulic jacks on the front frame, you can alternate jacking to keep the stress off the one side and save a windshield. And yes, one inch off the roadway is plenty to crack that windshield right down the middle from bottom to top. Not all of them will crac, it depends on the distortion you set up in the body and the clearances between the glass frame opening and the glass. Forget bumper jacks, they are dangerous and can cause body damage.
>
> Phil Swanson
> 77GMCPB
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| Re: [GMCnet] Need a suggestion for a jack to carry [message #85294 is a reply to message #85204] |
Wed, 19 May 2010 15:19 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Unless Bontrager's has received a new supply since the fall GMCGL
shipshewana rally last year we bought them out and there were none
left. We can check.
J.R. Wright
GMC GreatLaker
TZE Zone Restorations
77 Eleganza Custom (For Sale)
1975 Avion (Under Reconstruction)
Michigan
> Bontrager surplus has (had?) a squatty fat two stage Ford jack for
> $20 that
> can get under the arm, and has plenty of capacity to lift the wheels
> off the
> ground, front or rear. It's the only jack I carry. The Great
> Lakers have a
> rally not too far from there this weekend, and someone will probably
> visit
> them if you want one, or at least check for availability.
> Druber
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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