How to Troubleshoot & Replace Whirlpool AP4036191 / 27001233 Drain Pump

Ordered a new pump, belt and idler pulley from AppliancePartsPro. Removed the 4 mounting bolts on the motor/pump assembly and removed the hoses from the pump, then tilted the motor to expose pump and belt. Removed 3 mounting screws (torx) from pump and pried the pump loose (some effort with short pry bar and screwdriver). Removed retainer c clip from idler pulley axle, removed old pulley, installed new pulley and c clip. Positioned moter/pump assembly and bolted it up. Positioned new belt on drive pulley, idler pulley and agitator shaft of washer. 

I replaced the worn parts. Removed the electric motor/pump assembly then took it to my motorcycle repair shop to clean/maintenance the motor, remove the old pump because it was stuck on the motor shaft. Once removed I blew out dust/debris from the motor w/compressed air. Sanded and filed the corrosion off the shaft, applied a "sealing grease" of sorts to the shaft to make potential future removal easier and reassembled. I took the whole wamma jamma home, reinstalled and wah-la, fixed. I am blessed more than most to have access to hand tools and other equipment at my shop. I could've fixed it completely at home but, since I've the ability to take it further, I did. 

The water pump is cracked in the axle. I can see bearing balls in the pump. Replaced the broken pump with a new pump. Everything works fine. 

This is a relatively simple fix if you have any mechanical skills at all. Took about 30 - 45 minutes to complete and only 1 beer. 

Looked up on line causes for a leaky washer. Opened the front panel and there was water on the washer pump. Entered the model # on line and bad pump. I found a step by step video on how change it. So I ordered the part on Thursday and it was here by Saturday morning (Standard shipping). The hardest part of the repair was getting the belt back on, but the rest of the repair was easier than expected. Took me about 40 minutes and that includes 15 minutes wrestling with the belt, belt was hard to get to. Total cost of the repair was $45 and that included shipping. It would of cost at least $200 if I called a professional. 

Unplugged machine from outlet. Removed front cover. Disconnected wiring harness from motor. Removed four screws from motor to washing machine base. Slid motor towards center pulley and slid belt off. Turned motor upside down and removed three screws from pump to motor. Removed and replaced motor. Reverse procedure to install. 

Replace water pump, drive belt and drain hose..... 

It came fast and it fit perfectly. I fixed it myself' very easy to repair. 

Replaced belt 

Replaced the water tank drain pump