vacuum pump

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dolphins1131
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Joined: Sat Jul 08, 2017 9:03 am

vacuum pump

Postby dolphins1131 » Mon Jul 10, 2017 5:58 pm

i will be servicing my ac soon and already ordered me gauges and vacuum pump

its a cheap pair and was wondering if it will do the job correctly

heres the specs on the pump

5Pa
Oil Capacity
320mL
Voltage
110v/60hz
Inlet Port
1/4" Flare
Power
1/4HP
Free Air Displacement
3.5 CFM

i just thought of this could i just rent these tools from autozone or will these work because i was watching a youtube video and the guy had a cheap pump and it looked like he only got his vacuum 20 under the 0
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Cusser
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Re: vacuum pump

Postby Cusser » Mon Jul 10, 2017 10:07 pm

I was 100 miles away from my vacuum pump, used the Autozone loaner, worked fine.
dolphins1131
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Re: vacuum pump

Postby dolphins1131 » Tue Jul 11, 2017 12:38 pm

just picked up the vacuum pump loaner
is a 1.5cfm 1/6 hp but its a mastercool
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Cusser
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Re: vacuum pump

Postby Cusser » Tue Jul 11, 2017 3:55 pm

Remember too that higher altitudes mean less numerical vacuum can be pulled.
dolphins1131
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Re: vacuum pump

Postby dolphins1131 » Tue Jul 11, 2017 4:26 pm

that might be what it was
on the loaner gauges the low side rests at 5psi
i think the needle is bent

i pulled a vacuum on the gauges and it got down to -25
i then closed the gauges and its holding at -25 for the last several hours

should work for what im doing

whats the limits on how long i can pull a vacuum on my 98 mustang 3.8l
how does the oil stay in the system when vacuumed
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Tim
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Re: vacuum pump

Postby Tim » Tue Jul 11, 2017 11:43 pm

20 minutes.
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Cusser
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Re: vacuum pump

Postby Cusser » Wed Jul 12, 2017 8:02 am

dolphins1131 wrote:how does the oil stay in the system when vacuumed


The refrigeration oil (and dye) are not volatile at ambient temperatures even at the full vacuum.
dolphins1131
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Joined: Sat Jul 08, 2017 9:03 am

Re: vacuum pump

Postby dolphins1131 » Wed Jul 12, 2017 9:47 am

is 20 minutes the longest or shortest amount of time i can pull a vacuum?
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Tim
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Re: vacuum pump

Postby Tim » Wed Jul 12, 2017 10:08 am

Run it as long as you want. But normally these 12 hours runs are over kill.
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