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#1
10-21-2003, 12:15 PM
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TO RENT OR TO BUY... that is the ..
.... question. Redoing my evap on my SL500 and pretty soon changing my compressor on my 560SL. Local O'Reilly has them for rent for $400 with history unknown. On the other hand, I can get my own , brand new for the $200 +/- neighborhood. I know this is such a minor thing to decide on but....what are your experiences on the rental units...
...just when you guys have time , I would appreciate the input.
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a2 1978 280 CE silver 1986 560 SL black 1987 300 SDL cream 1994 SL 500 brilliant green 1997 E 300d dessert silver 2005 FORD F250 Superduty Crew cab 4x4  ____ADMU____ 
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#2
10-21-2003, 12:30 PM
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Are we talking vacuum pumps for evacuation? Rental fee? I think a sentence or two got left off the post, but then again, I can be pretty dense.
__________________
The Golden Rule 1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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#3
10-21-2003, 12:31 PM
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my mistake... Vacuum pump for evacuation. And that is correct- rental fee: $400.
__________________
a2 1978 280 CE silver 1986 560 SL black 1987 300 SDL cream 1994 SL 500 brilliant green 1997 E 300d dessert silver 2005 FORD F250 Superduty Crew cab 4x4 ____ADMU____
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#4
10-21-2003, 02:24 PM
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With a $400 rental fee, buy this instead and let us borrow it
http://www.acsource.com/product.asp?0=234&1=283&3=220
__________________
The Golden Rule 1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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#5
10-21-2003, 02:40 PM
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I'd be more than happy to rent you my yellow jacket evacuation pump for a weekly fee of $390 dollars.
Of course I think I only paid $220 for it a couple of years ago so it may not be the best deal for you - but I'll stand by my offer.
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#6
10-21-2003, 04:06 PM
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If you have an air compressor, Harbor Freight tools has a venturi-style vacuum unit that is made for this type of work. It's about $15.
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D.H. 04 ML500 02 E430 Experience is something you don't get until just after you need it.
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#7
10-21-2003, 05:53 PM
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Venturi type....wonderful idea.... good results????
__________________
a2 1978 280 CE silver 1986 560 SL black 1987 300 SDL cream 1994 SL 500 brilliant green 1997 E 300d dessert silver 2005 FORD F250 Superduty Crew cab 4x4 ____ADMU____
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#8
10-22-2003, 02:36 AM
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No. Venturi-generated vacuum is fine for sample drying in chemistry lab but is incapable of generating the > 29" Hg vacuum necessary for A/C system evacuation.
The Harbor Freight tool vacuum level is listed at 28.3" Hg, requires two minutes to reach that level internally (before being connected to an A/C system) and uses 4.2 cf of air per minute. An air compressor of appropriate capacity is necessary just to power this.... and lower air flows will result in even poorer evacuation. Regardless of the length of time run, this venturi pump is incapable of reaching the level of evacuation needed. Invest in a proper vacuum pump... it will pay for itself in the long run. And buy several spare quarts of pump oil... rotary vane pump efficiency falls off as the oil absorbs water vapor and debris scavaged from the system.
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#9
10-22-2003, 09:42 AM
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Another DIY option
Find an old refrigerator or dehumidifier and salvage the motor/pump assembly as a vacuum pump. I've done a few jobs that way.
Forget the rental.
__________________
95 E320 Cabriolet, 169K
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#10
10-22-2003, 11:59 AM
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rental issue solved
...a good friend of mine borrowed an electric vacuum pump from a shop for me..Now, how do I attach the pump to the gauges then to the car?????Which valves should I open or close???
Boy do I need directions!!!! Thanks for the help.
__________________
a2 1978 280 CE silver 1986 560 SL black 1987 300 SDL cream 1994 SL 500 brilliant green 1997 E 300d dessert silver 2005 FORD F250 Superduty Crew cab 4x4 ____ADMU____
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#11
10-22-2003, 12:20 PM
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o)
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#12
10-22-2003, 12:31 PM
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.... i use 134 A. And all I need now are gauge set up instructions to vacuum the system. Thanks for the info, TX76513.
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a2 1978 280 CE silver 1986 560 SL black 1987 300 SDL cream 1994 SL 500 brilliant green 1997 E 300d dessert silver 2005 FORD F250 Superduty Crew cab 4x4 ____ADMU____
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#13
10-22-2003, 01:52 PM
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I bought a set of manifold gauges, and frankly I rarely use them. When charging into an empty system, I usually charge to vent temperatures. When the vent temperature stops dropping, I know I've put enough refrigerant into the system.
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95 E320 Cabriolet, 169K
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