Sure sounds scary!
ZsaZsa,
This machine is not ready to be buried just yet... Itr's only 30 years old!
However, you did not say how often it is used. If it is only used a few times a week, or less, then it is possible that the shaft seal did fail and water leaked down into the motor bearing which would eventually cause the grinding noise you heard. Tis series of machines lacked any type of macerator or grinder to chop up anything that got into the pump and relied on the multiple filters in the machine to stop just about evrything from wrecking theings. But sometimes things got by them. But also, after 30 years, the shaft seal could easily have given out.
As was mentioned, they are available from Hobart under the 117011 part number and lists for 30.70
Hobart carries a replacement motor assy for your motor but the gaskets will be different and it is also priced much higher than what WShirlpool and other distributors will charge for the Whirlpool replacement. You can try Marcone Parts which has a cool catalog feature you can browse thru and also you will often find these kits on Ebay.
As far as pulling the machine out, it has NO wheels, Is usually secured to the countertop and is hard plumbed in as well as usually hard wired in meaning it is connected with a cable directly to the circuit breaker/fuse panel. Some were connected with a service cord that plugs into an outlet, but I would venture to guiess that 30 years ago, that would be an exception and not the rule.
It will most likely much easier to remove the machine from its current home in order to replace the motor because it drops down out of the tank to the floor and can be hard to remove with all the wiring and such under the machine. An experienced tech can sometimes have problems doing it so I would take it out.
It also will allow you to re-insulate the unit to makie it quieter and help retain the heat of the water in it since it sounds like it may be one of the models without any supplemental heating in the tank.
If you have more questions, feel free to contact me or any of the people here or post them on this forum and we will see what we can do to help.
Here is a link for the complete pump replacement kit and shows all the parts you will get in the kit andyou will have all you need to do the job. This kit fits the 16 and 17 series and the motor parts will fit the 15 series as well as long as you use the old gaskets on the 15's.