Bottom threader. Thread does not go to top. Stops. Do I need to more pumping? I do it 3-4 times now.

Move the needle to the top.
Loosen the screw on the threader.
Use the threader as if you are using it. You will have to adjust it to the side and up or down. Move it so the threader is in the needle hole.
Tighten the needle.
If it still doesn't work you may need to replace the threader.

Not clear what the question is.

If it is how to get the thread from the bobbin up to the top then as follows.

Thread top thread through the needle as standard. Holding the end of the thread slowly turn the wheel in forward direction so needle goes in and out and pull the bottom thread up that should now be in the loop of the top thread.

Am assuming the bobbin has been correctly assembled and fitted, with a thread of sufficient length dangling..

hi there.
go to this link should help you to find out why.
Singer Sewing Machine thread just bunches up on the bottom of the material...

Thread should flow from top right of bobbin or spool and the spring must be in place before installing the bobbin.
1. Thread the handy stitcher
2. Pass thread through hole on the thread guide which sticks out from the side of the needle arm.
3. Pass thread through top of the tension control between the plates, but don't wrap completely around the tension control.
4. Then pass the thread through the thread guide located on the bottom side of the needle arm directly behind the needle.
5. Use threader to pass thread through eye of the needle from back to front (opposite of a "real" electronic sewing machine.
Hope this helps.
Jimmy

if the machine still sews a straight stitch on top of fabric & also on bottom then it should be fine..
it's possible that the thick fabric, needle, & thread were not a compatable combination.
but also some sewing machine are not made to sew thick or heavy
fabric
but having the machine serviced would be a good idea & help to know why the needle thread is not working

Needle threader heads are actually easily replaced and should be replaced anyway every few years because they do wear-out. Get a magnifying glass and, having returned the needle to the top (use the foot controller, so that the machine stops it in the right place), pull the needle threader down until the head rotates towards the needle. Look with the magnifying glass to see if the small hooked part in the centre of the threader head (the light grey plastic part) goes through the eye of the needle - if not, you might be able to bend it VERY carefully so that it does - that should cure it. If the hook is a long way above or below the needle eye, dont try and bend it, the cam that rotates the threader has probably moved on the needle bar and will need adjustment by a service agent. If the hook is passing through the eye of the needle OK, but still not pulling the thread back through when you release it - i.e. the thread is just slipping-off, the hook has become rounded through normal wear and you'll have to replace the threader head. The threader head simply pulls off - you might need to carefully lever it off the round shaft. Replacing it is a matter of simply putting the new one on the shaft and pressing upwards firmly so that the grooves in the threader head go right up to the horizontal pin on the threader shaft.

When you have the threader engaged to the needle hold the thread between your two hands horizontally and slide the thread behind the needle starting from the bottom up until you feel it stop then pull the threader gently out toward the back of the machine. Sometimes it takes a few tries to get the hang of it

Open the front cover and raise presser foot to release all threads. Depress the machine lock button firmly with your left index finger. At the same time manually rotate the machine hand wheel slowly forward until he button "snaps" into the locked position and the lock button release lever moves to the far left.

Thread the machine to the point where the thread is in the needle bar thread guide. With you left hand hold the upper thread towards you. With your right hand pull down on the threader unit and twist it so the tiny hook goes through the eye of the needle and hold it there. Now take the thread that you are holding in your left hand and pass it to the rear of the machine under the small guides on the threader hook. Release the threader mechanism and the thread and the tiny hook should pull a small loop through the eye. Pull on this small loop (which will be on the right side) all the way through the eye.
Viola!

good luck!

Hi - welcome to FixYa. I have this machine, and unfortunately, the cassettes can break. If the threader worked when you first got your machine, I would suggest buying a new cassette (even if your threader is working). A second cassette is very handy because you can thread your next color in the extra cassette before the machine stops for the next color change - when the machine does stop, just put in the second cassette, and thread the other with the next color - speeds things up alot. And, if one of the cassettes does break, you aren't sitting in a puddle waiting for a new one.. You can find the thread cassettes for sale on a variety of sites - this is where I buy mine:

http://webstore.quiltropolis.net/stores_app/Browse_dept_items.asp?Store_id=492&page_id=17

Some of the 270Ds came with a spool pin - look in your manual for a picture and for the instructions for installing and using the spool pin. You can use it for spool of thread that are too large for the cassette and I think you can leave it installed on your machine all the time. If you don't have your manual, leave a comment and I'll look mine and check the instructions.

Hope this helps. If you have a minute, a rating (good or bad) tells me if the information or solution I provide is helpful to anyone who visits FixYa.

If you would like me to write a tip on salvaging an embroidery project that has been pulled into a birdsnest, leave a quick comment and I'll add the tip. Thanks everybody, and good luck. Please feel free to comment if you need more help or have more questions.