I found this at a scrap yard, plugged her in and just like the title says, “-” After inspecting and repairing the connections, the first power up she blew the fuse, I bypassed the fuse and tried again for about two or three seconds, sounds like the motor turns but had to shut her down due to heat and trying to salvage it without burning it up if it isn’t already. I know nothing about these kinds of pumps/motors. Are those oil intake and drain bolts? There is not a drop of oil in it if they are for oil.
Remove motor and try turning the motor shaft by hand. If it turns hard or feels like it is bumpy the motor bearings are shot and need replaced. If you try to turn it on to long you will burn out the windings. Bearing are easy to replace if you can find the right size puller. When the bearings have been removed take them to your local bearing supplier and they can cross reference the bearing number to get you a replacement.
Thanks W. Ogre. Here is what it looks like under the hood. Accomplished 4 things. 1. Nearly stripped a stubborn screw, oh excuse me, bolt. 2. Span the motor 3. Noticed the contacts on the back board were needing alignment and a few scrapes with sandpaper 4. Reassembled the rear plate, plugged it in and it sucked.
I shut it off quickly and will repack it.
Last question. Does it use oil and if so what kind?
Oh yeah, guess where my cat has been. She loves wood chips.
Warning !! repacking the bearings may not work for long because the bearing race may be pitted or the ball bearing retainers cracked. Now that you know it runs and its a bearing issue better you replace the bearings and not have to worry about the bearings freezing in the middle of a pull. New bears if bought at a bearing supply store are not expensive maybe $15 to $25 . Small bearing pullers can be found at any auto parts store. I just replaced the bearings on my Hitachi sliding miter saw which is 19 years old and the bearings were only $18 but I needed them fast so I paid next day shipping so it worked out to a few penneys less than $30 . To replace the saw would have cost about $600 . I have had most of my shop tools long enough to have had to replace the bearings and it is a lot cheaper to do that than screw up the motor and have to replace that.Now he/she/it sucks @ -720mmHg
Oh, we’re talking about vacuum pumps. I get it.
Whew, that was close! gdaddy, Well my wife sucks too , and if she saw this she would kill me !!!
Excellent advice on the bearings. I picked this sucker and a dot matrix A3 printer up for ¥500 then threw in a ¥100 tip for a beer because I know the guy and that he likes to drink. ¥600 is like $6. or something. Oh yeah, the printer works too.
Oil. hydrocarbon vacuum pump oil. Fill if up to the center of the sight glass, in otherwards 1/2full. Vacuum pump oil from Grainger.com. E bay or local AC shop. vac oil is mineral base so don’t be tempted to use compressor oil which is petrolium base. With good bearings and vac oil that sucker will last the rest of your life !!!
