MDB7749SBM2 Maytag Dishwasher - Instructions

When the top rack stopped cleaning, I tracked down the problem to the food shredder/chopping blade, and then to the impeller that drives the blade. The knob on the impeller had sheared/broken off. That meant removing the motor, and replacing the impeller. Four hours, a band-aid, and a trip to Home Depot later, here are my suggestions

1. Look for videos – this site is awesome, but they don’t have a video on this particular repair. I found 4 that got me close to knowing what I was doing.
2. Do all the “remove internal stuff” - you had to anyway to find the issue with the shredder/cutting blade
3. Take pictures as you move along, you’ll need them when you have to remember the placement of the water line, drainage hose, wired connections etc.
4. You need a 1/4 inch socket set. A 3/8 drive will NOT work (it won’t fit between the shroud and the base). Don’t start working on the repair, unless you have a 1/4 in socket with about a 6" extension
5. Someone at Kitchenaid should be shot for having the waterline connection facing the back of the unit. Use a short adjustable wrench
6. The order comes with a washer, but when you take the impeller off this model, you’ll see you don’t need it.
7. Placement is everything – there was zero clearance between the bottom of the unit and the floor. Placement of the water line, drain hose, and power line was critical – had to re-position the unit about 7 times to get it to “play nice”.
8. Hindsight – only needed to remove the wire harness for the motor (take pictures)
9. Hindsight – gloves are a great idea – sheet metal is unforgiving

all 4 wheel units needed to be replaced, popped them off and installed need wheel units in roughly 10 minutes, no tools needed.

You need to pull the unit out to get access to the spring connected to the rear leg frame. Use the everything in the kit. The rollers are upgraded and will guid the cable better.

Just followed the YouTube video they sent with the receipt.

A Mouse friend had seen fit to chew through the original drain line. I used my Model Number, and was able to order the correct part . It arrived the next day. The job itself is fairly straight forward. You will need to access the rear of the machine. This may include shutting off, and disconnecting the water supply line. (Adjustable wrench). Mine is under the sink, on the "Hot" side. You may also need to un-plug the unit. (recommended) . A pair of (Pliers) will be needed for the spring clamp.

just had to remove 4 screws on the top of panel and disconnect the plug

pull out the dishwasher
lay it on its side
use a 1/4" drive socket with extension and a universal joint to undo the the hidden bolt,
twist the motor 1/4 turn. this is the hard part you have to pull fairly hard and rock the motor around a little to get the o-ring to let the motor slide out.
lube up the new motor with jet dry or soap and insert back it, turn it back 1/4 turn, install the bolt and plug the motor control wires back in, then reinstall it back under the counter

I removed the dishwasher from under the counter. This took the bulk of the repair time along with disconnecting the water supply and electrical connection. I had enough slack in drain hoses that I could turn the dishwasher over to replace the motor. I was surprised that there was only one bolt that held the motor in place. I put the motor on, turned the dishwasher upright and slide it back unde the counter and began the long process ofreconnecting everything. I am sureit could have gone faster if I were younger and did not need glasses for close work. Start to finish took me four hours. This was the fourth time I have replaced motors in dishwashers of various makes.

First research then troubleshoot
Removed
1 Upper rack
2 Lower rack
3 Lower Wash Arm and Strainer Parts
4 Upper Wash and Rinse Parts
5 Accumulator assy.
6 Motor shield
7 Inlet protector (most difficult)
Noticed blade was broken off chopper assy.
Replaced chopper assy.
Runs and cleans like new.
Most difficult step was to remove Inlet protector
After removing two torx screws (#15) used small pry bar to lift inlet protector from position. Not easy to accomplish with hands alone. Inlet protector fits tightly into position.

Removed old gasket, cleaned track thoroughly, then followed instructions from video on Part Select order form. Instructions very clear and precise. Getting the new gasket was a little tedious at the corners but take your time and work the gasket with your fingers as shown on the video.

Disconnected power to dishwasher. Removed water supply hose from inlet water valve.
Removed lower and upper racks. Removed Lower spray arm. Removed tube from pump tp top spinner. Pulled dishwasher from under cabinet (remember to tip to get back out!). Placed dishwasher on its back. Removed electrical connectors from water valve, main motor and drain motor. Removed drain hose from drain pump. Removed pump/motor assy by pulling out wedges and pushing assembly into dishwasher. Removed pump/motor assy from inside dishwasher. Cleaned out pump. Installed new chopper. Re-install pump/motor assy. Re-install driain pump hose. Re-connect the pumps and water valve electric connectors. Slide dishwasher near cabinet for re-install. Re-connect drain hose to dishwasher. Re-install dishwasher under cabinet.Reconnect water supply. Removed top spinner from tube. Installed new spinner onto tube. Re-install tube onto main pump (below lower spray arm). Clean out and re-install lower spray arm. Remove middle spray arm from top rack. Clean out spray arm. Re-install spray arm with a new gasket (gasket may have not been needed). Re-installed lower and top racks. Re-connect power supply. Position all three spray arms pointing towards the door to confirm they were turning. Tested dishwasher - confirmed fill, wash, and drain properly. Also confirmed that all three spray arms were turning. Machine is washing, draining and running great since!

Looked at other side of top rack which still had the stop. Just had to orient the direction of the stop and push it firmly onto the rack arm. Took a couple tries, but it went in and locked. Works perfectly. Inexpensive and easy fix to to very annoying problem.

1) clear out the dishwasher
2) remove unit securing screws from top or sides of DW and cabinetry near the top or under the counter top
3) gently pull the dishwasher from the cabinetry about 20" is plenty, mind the connecting hoses and electrical connection
4) close the door! pull back the insulation from the area of the hinge and photograph both sides - this will save you the pain of going online
5) you will see the cord, the tensioning wheel assembly and the door balance spring on both sides
6) with the door closed to relieve tension on the cord, remove the cord from the balance spring - this can be done w/o tools at this point
7) remove the 5/16" screw from the plastic tensioning wheels and remove the tensioners, cord - leave the springs in place if not replacing them
8) install the door end of the cord to its hook on the hinge, install the new tensioning wheel assembly, install the old 5/16" self tapping screw through the lower wheel and into the outer hole in the frame
9) thread the cord from the door over the upper wheel and lower wheel. the lower wheel has cord retaining tabs to hold the cord on the assembly
10) hook the eye end of the cord to the balance spring and you are finished with the first side - repeat operations for the other side, reposition the insulation and slide the washer back in its cavity - do not forget to reinstall the stabilizing screws in the upper washer frame
11) you've done it!
12) have a cuppa and do your second washer that hasn't failed yet - it will soon.

Prepared by watching the video. Great instructions. Great.

Disassembled easily as per video. Removed the old latch and installed the new.

Began the reassembly and learned that after ten or more years the small plastic parts used to keep the dishwasher steady had slowly deteriorated to the point that I was breaking these necessary items faster than I was putting the appliance back together.

What was a half hour task became over two hours and the end result was for me to put my tools away and buy a new dishwasher the next day. I learned that if your appliance is over ten years old BUY A NEW ONE!

Great job by the people who make and sell the latch parts for you who own a dishwasher that is only a few years old.

Thank you Part Select.

The video included with this part is perfect. Unplug the dishwasher, take off the front trim piece, remove the drain hose from the pump, unclip the power, press the little clip that holds the pump in while turning it counter clockwise to remove. Then just do that in the opposite order to put the new one in. Just make sure you hear it click when you twist the new one on so you know the clip has engaged. Super easy.