Question about Ammco Combination Disc/Drum Brake Lathe

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My Ammco 4000 brake lathe needs the large rubber boot over the spindle that adjusts cut for brake drums replaced. Can you give me advise on how to change this large rubber boot ? Thanks.

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Posted on Jan 02, 2017

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1fastbob
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SOURCE: I HAVE AN AMMCO 4000 BRAKE LATHE AND WOULD LIKE TO

http://cgi.ebay.com/ebaymotors/Ammco-4000-Brake-Lathe-Operating-Manual_W0QQcmdZViewItemQQitemZ360197546157QQptZMotorsQ5fAutomotiveQ5fTools

You might try buying a manual for it. There is one on E-bay right now. might be $14.00 well spent.

Hope this helps.

Bob

Posted on Oct 28, 2009

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SOURCE: MY AMMCO BRAKE LATHE IS CUTTING EVEN,BUT LEAVING SMALL GROOVES

The problem isn't clearly explained. but the main shaft bearings go bad after awhile and it's one day thier good the next job their bad.

Posted on May 13, 2010

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Ammco 4000 longtravel g/box adjustment not working properly,variable speed adjustment works slowly,then when increased starts to work backwards


What you are referring to is called an "Infimatic" gearbox, or drum-feed gearbox.

The problem lays inside most likely with the clutches.
They are worn out, and possibly other components are worn and broken. Feeding backwards means something has gone terribly wrong--and it needs to be fixed immediately for the machine to operate properly.

These gearboxes are not easy to fix properly--they are literally like a puzzle inside. Our shop employs a infimatic gearbox specialist and we are one of the few shops who can rebuild them to factory spec.

A brand new Infimatic gearbox will run you over $1,300.00 plus tax and shipping from an Ammco depot.

You can ship a broken Infimatic gearbox to our shop for a complete rebuild to factory spec.

For more information...

Buy Sell Used Brake Lathes Brake Lathe Parts

Mar 04, 2014 | Ammco Tools & Hardware - Others

1 Answer

AMCCO 4000 BRAKE LATHE CHATTERS WHILE TURNING ROTORS


Not enough rigidity, wrong speed, wrong feed rate, wrong depth of cut, wrong or dull tooling...

Feb 03, 2012 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

Instructions for changing an ammco 3000 brake lathe to a 4000. Parts needed?


Yes, an Ammco 3000 brake lathe can be converted over to a 4000 model--most any year 3000.... preferably the later years after 1970.

The problem with some of the early 60's models is that the cross-feed bore is not perfectly perpendicular to the spindle.

If you convert one of these models, you will cut the rotor at an angle and then jam the machine.

Later models can easily be converted.

You will need...

1) A complete disc feed gearbox.
2) A driven pulley (the big one) set-up for a with a pin drive.
3) A complete spindle lock assembly for the Infimatic gearbox.
4) Possibly need a longer guide bar for the cross-freed. If you have a round guide bar, this is possibly long enough. If you have a "Double-D" guide bar (flat on each side), you most likely will need a longer bar.
5) A complete twin-cutter, with tool guides, tool holders, knobs, etc.

We have all the parts you need for a conversion--or we can convert it expertly for you...

Buy Sell Used Brake Lathes Brake Lathe Parts

Aug 03, 2011 | Ammco Combination Disc/Drum Brake Lathe

3 Answers

Brake lathe chattering bad


There's a lot of reasons why a brake lathe chatters during a cutting operation. They range from lack of maintenance, adjustments, cutting speeds, wrong cutting tools and so on and so forth.

Be a little more specific.

What kind of machine are you using?
What are you cutting? (rotors? drums?)
Are you using the proper silencers?

Come back with some answers please.

Buy Sell Used Brake Lathes Brake Lathe Parts

Dec 16, 2010 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

Replaced belt on 4000 lathe and now I have no fast feed.


I think that you really need to source the manual for that machine.

Nov 27, 2010 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

How do I change the belt on my ammco 4000 lathe?


I am a brake lathe technician.

To change the drive belt on an Ammco 4000, you must first remove the 90 degree angle PTO (power take off) gear assembly which is driven off the back of the big pulley. Two small allen head screws hold it tight.

Pull the PTO gear assembly out of the disc-feed gearbox. If there are colored shims between the gearbox and the PTO assembly, you must make sure not to loose. If they drop off, be sure to replace them with a dab of grease.

Rotate the red knob at the back of the machine and the motor assembly will unlock and rotate upwards. Replace the drive belt.

To adjust the drive belt tension properly--loosen the 3/4 inch nut on the back of the machine, and the motor will drop down. Tighten the 3/4 inch nut and then rotate the red knob back until the belt is taught.

Replace the PTO gear assembly--making the rotating part with the protruding pin is centered on the big pulley. Tighten the allen head cap screws.

Turn on the machine. If the PTO is making noise--you have not correctly is correctly. Repeat the centering process until the machine runs without rattling or vibration.

Sep 28, 2010 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

Hi, we have a AMMCO 7750 brake lathe, the problem is runout in the ARBOR we have replaced the arbor but still have the same result. We are unsure of hat is causing this so any help or advise would be...


First off--your model Ammco is their "El-Cheapo" model.
Yeah, they work, when they work that is.
I doubt that your problem lies within the spindle bearings. But it could-- I suggest that you tug on the spindle to see if you get any back and forth end-play, or up and down play.... if so, you are screwed. This machine is not worth the effort, money and time fix this problem.

As for the arbor...

This model uses the same arbor that the better 3000, 4000, 4100, 7000 and 7100 models.

Every time you replace an arbor (new or used) you have to...

A. Lap the arbor into the spindle using lapping compound (just like lapping valves in a cylinder head) The lapping compound is then cleaned out of the spindle and off the arbor, then...

B. You then have to check the "runout" with a dial indicator. These are obtained cheaply at Harbor Freight FYI. With the dial indicator mounted (magnetically) on the twin-cutter check the arbor run-out. The runout (two inches from the spindle) should be no more than 1 1/2 thousandths. One thousandth or under is optimal. Any reading over 8 thousandths cannot be straightened.

C. If the run out exceeds 1 1/2 thousandths, you have to then straighten the arbor.

To straighten the arbor you will again need the dial-indicator and a heavy copper hammer....

With a wrench on the end of the draw bar (far right on the end of the drum gearbox), rotate the machine (counter clockwise) until you find the high spot on the arbor (carefully watching the dial-indicator).

Remove the dial indicator and give the arbor a whack with the hammer (not too hard if this is your first time) when the high spot is directly straight up.

Install the dial-indicator and check the run-out again.

Sometimes you will get it on the first whack--sometimes you will have to go through an ordeal until you get the arbor in spec.

And remember--sometimes you can bust the arbor completely off on the first whack. They are hardened and allegedly tempered, but some are more hard than others. If it breaks off--tough luck. You need to get another arbor.

I have personally straightened arbors more than 30 thousandths out (once)... and I don't want to repeat that ordeal. Sometimes arbors cannot be straightened (bent in strange ways) and cannot be straightened.

When loosening a rotor, do not allow the work to dump onto the arbor. This is the main reason they go out of whack.

Buy Sell Used Brake Lathes Brake Lathe Parts

Jun 29, 2010 | Ammco Combination Disc/Drum Brake Lathe

2 Answers

MY AMMCO BRAKE LATHE IS CUTTING EVEN,BUT LEAVING SMALL GROOVES


The problem isn't clearly explained. but the main shaft bearings go bad after awhile and it's one day thier good the next job their bad.

May 13, 2010 | Ammco Combination Disc/Drum Brake Lathe

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