I disassembled doors front and back and found a pin hole leak in the tub tonight. Looks like a 1mm hole in bottom left of tub (when looking from back). I ran a cycle and 100% certain water leaking from hole. Maytag Washer MFW9700SQ1. Question is short of replacing tub what can I do? I was thinking of using some quality epoxy?

Confirm that it is not the door seal. The door seal can easily be replaced and the parts are available.

You would expect that any water leaking around the door seal would migrate down to the lowest part of the tub leaving the appearance that the leak is where the two half's of the tub are joined by the retaining clips
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Replacing the seal between the two tub half's is a different story as compared to the door seal. The tub seal is definitely do-able, but not for the faint of heart!!
Washer Tub Seal Replacement Frigidaire Front Load Washing Machine Repair...

If the leak is very very small I might wait until a major overall is require such as the tub seal/bearing. If I chose to wait I would monitor the situation.

Inspect the area at the hub of the pulley looking for streaks of rust.. If there is an indication that water is leaking past the basket tub seal than doing an over hall now may included front door seal, tub seal, bearing and basket seal replacement.

see this causes and fix it. God bless you

Try to identify roughly the area the leak is coming from. This will eleminate some of the following

Hose Connections
Check the rubber washers or replace if the hoses are leaking at the water inlet valve.

Door Seal
This is a common place for leaks. Carefully check by partially pulling seal inside out and check for punctures, pens, pencils... Additionaly if the door is not closing properly it may need a door adjustment. This can easily be done by loosening the hinge bolts on the front panel, adjusting and retighten. The seal is also known to get lightly snagged by zippers or rub by heavy items when close are being removed. This tends to cause the seal to get damaged at the six o'clock position. This is sometimes hardly noticeable but if it is leaking from the bottom of the door replace the door seal.

Water Inlet Valve
If the hose connections are good to the water inlet valve check that water is not leaking from the valve itself it is replace the water inlet valve.

Drain Pump
Check the drain pump housing and all hose connections. The drain pump is behind the lower panel, behind the back panel, and sometimes removal of the front panel. Hoses can be tightened. If hoses or pump housing is leaking replace the pump assembly.

Outer Drum
The outer drum is 2 halves bolted together some washers have a seal between others do not. If the washer is leaking between the seems disassembly of the washer will be necessary. The top panel, console, front panel, door seal, struts. Follow the video for the strut replacement and remove the top springs and the inner and outer drum will pull out the front.

Hello,
I've owned the same Neptune since 1999 and had this problem happen to me twice, the first time the inside molded plastic door melted through in a circular pattern and had to be replaced. The fact that it was circular indicates that something was rubbing during the high speed spin. That something was a stiff bottomed duffle bag that was rubbing on the plastic door during high speed spin. The washer was full of other clothes that didn't allow the duffle bag enough room in the washer tub, hence it pressed against the plastic door. The second time it happened I got a circular groove melted in, but not through, the plastic door... caused this time by a small child's back pack. I would make sure "rigid" items have enough room to "float" in the tub cavity by not putting in other clothing that over packs the washer.

Check the rubber bellow (gasket) around the door. This is the symptom of a door gasket that it starting to leak. Pull the rubber folds back and check the area where the gasket attaches to the wash tub. You may have a crack or tear.
or
The only way to determine where the leak is coming from is to remove the lower kick panel directly below the door. Remove the panel by removing the screws under the bottom front edge. With the screws removed, the panel will drop down, then off. If you prop the front feet up this will give you better access (a 2 x 4 works well).

With the panel removed inspect the rubber door bellow. If the front counterweight (gray concrete block on the front of the tub) is wet, the bellow is leaking. Pull the rubber folds back and look for any rips or tears. If the bellow requires replacing, or if you need to simply tighten the clamps, the following link will explain how:

http://www.fixya.com/support/r385211-replacing_door_bellow_whirlpool_duet

NOTE: Check the plastic dispenser hose on the left hand side of the bellow to ensure it is inserted all the way through the rubber to the flange joint. Sometimes this dispenser hose will slip behind the bellow and allow water to seep inside the cabinet of the washer.

Check the drain pump to ensure the filter cap is secure and not leaking. The pump is in the front directly below the wash tub. If the pump IS leaking, make sure the filter cap is tight and all hose clamps are snug. If the pump requires replacement, the following link explains how:

http://www.fixya.com/support/r401845-replacing_drain_pump_whirlpool_duet

Check all hoses the run from the wash tub to the pump, and from the pump to the standpipe at the wall for any signs of cracks or tears.

If the leak is coming from the center portion under the tub, the tub seal is breached and needs to be replaced. This is not an easy repair and will require some extensive disassembly to repair. (Cross that hurdle when the time comes).

Any replacement parts you may need can be purchased at searspartsdirect.com, appliancepartspros.com, pcappliancerepair.com, or repairclinic.com. You can use any web source you like, but these I have found, offer great service with competitive pricing. Shop all of them for the best prices. Hopefully you won't need any parts.

Please use this link to view an exploded view of your washer.
http://www.apwagner.com/large_image_viewer.php?image=images/diagrams/00204/i411639.GIF
You cannot remove the baffles without disassembling the entire tub assemblys.
To access the inside of the washer cabinet remove the two or three phillips head screws at the bottom of the front of the washer and the lower panel below the door will come off to give you access.
If your ring is anywhere it is probably caught inside the lint/debris trap #40 on the diagram. You will want to remove the entire rubber drain boot that connects between the pump and the bottom of the outer tub. Also try to reach inside the tub with your hand through the hole where the rubber drain boot connected if you do not find it in the lint trap.

I would not recommend anyone other than a skilled technician attempt to disassemble the wash tubs on this machine.
Good luck to you on this!!

in the front left bottom of the tub is a float switch; it sometimes is under a cover with a screw securing it it looks like a big round ball shaped piece of plastic and on the bottom of this float there's a pin going down a hole in the tub (the float pin sits on the switch and, water lifting up and down on the float moves the switch: listen for a distinct "click" as you move the float up and, down
you see; the float rises as the water fills the dishwasher tub closing the float switch and, signaling the washer to start cleaning the dishes
some times dirt prevents movement of the float but,waiting usually displaces the dirt/soap etc. just enough to make it work again until the float pin gets encrusted again the cure is to clean the float pin

You will need to remove the lower kick panel directly below the door to gain access to the inside cabinet to see where the leak may be coming from. The panel comes off by removing the screws under the bottom front edge of the panel. With the screws removed, the panel will drop down, then come off.

NOTE: Propping the two front feet of the washer up with something (a 2x4 works well for this) will give you better access to the screws.

The most common source of leakage on this washer is the rubber bellow around the door. It can develop cracks or tears over time and require replacement. A tell-tale sign is the front counterweight (looks like a concrete block on the front of the wash tub) looking wet. The counterweight will remain dry if the tub is sealed properly. From the inside of the washer, pull the rubber folds back on the door bellow and inspect the perimeter for any rips or tears. If the bellow is damaged, it must be replaced. The following link epxlains how:

http://www.fixya.com/support/r385210-replacing_door_bellow_kenmore_elite

If the bellow is intact, check the rear bellow seal where it connects to the front of the wash tub. If the clamp comes loose the bellow can shift and begin to leak. Tighten if necessary.

Check the drain pump and hoses to ensure they are not leaking. The drain pump is directly in the front under the wash tub.

Check the area directly below the wash tub. If the leak is coming from the wash tub iteself, you may have a bad tub seal. A replacement gasket doesn't cost much at all, but the labor involved is extensive.

Another simple problem is the dispenser tube(s) that come through the door bellow. Sometimes, these small tubes will work their way behind the rubber in the door and leak when the washer attempts to fill or rinse. This is a simple matter of adjusting the tubes to ensure they are seated through the door gasket properly.

If you have any questions, or require additional assistance, please let me know. I hope you find this information helpful.

NOTE: The repairman was correct about leaving the door open to prevent mold and mildew. Due to the water tight seal of these doors it is important to leave the door open when not in use to prevent any residual water from becoming stagnant and allows the wash tub to air out. Also, you should always check and clean the area around the door. Small articles of clothing can get stuck in this area and begin to mildew as well. I have repaired this washer numerous times and personally own one. I have never had a problem with it in the 9 years I've had it, following this regiment.

you did fine several companies built kenmore for sears yours looks like a frigidaire on some models there is a problem with water collecting at the bottom of the door where the bellows or boot is and leak to correct this they came out with a new boot that has a channel at the bottom with three holes in it so the trapped water can drain back into the tub the parts kit for that is 5303937187 now on washers with rubber boots its recommend that you shut the door with a little force to make sure it closes tight against the boot sorry about the letters they came with the part number you might want to call kenmore parts to ask about the boot kit if i was there i could tell you but it looks like a frigidaire to me

watch the drawer closely as it fills, on out side of machine it might be hard to see or else small hole in door seal also hard to find good luck luck close ire

this will more likely be your door seal open the door pull your seal so u can see inside and feel around as u look u will more than likely find a hole the water looks like it comes from somewhere else but it will be from the hole in the door seal seen this with hundreds of washers m8