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My brother had a Mr. Coffee coffeemaker that stopped working. It would not turn on at all. He told me that they only use it when they have visitors So all I had to do was rig something up to make it functional.
This is the coffee maker.
This image shows a MX350 when taken from the trash.
MX350 operation:
MX350 operation:
The MX350 has a 24 Volt motor which uses a chain to power the rear wheel. It is powered by 2x sealed lead acid batteries. A twist throttle and brake are on the handlebars. An interesting feature is that twisting the throttle closes a push button switch. It is not an analog control over the speed. A motor controller receives the input from the switch and ramps up the speed until it reaches top speed.
The red rectangles show that the throttle contains 2 push buttons. One button is normally open and the other is normally closed. Rotating the throttle back will depress the normally open switch. Releasing the throttle will return to a center position. Rotating the throttle forward past the center position will depress the normally closed switch. I think this is a type of safety.
Repairs
Repairs
Batteries
Batteries
The batteries were missing when the dirt bike was recovered from the trash. I went to batterysharks.com to find replacement batteries. I have used this website before and I was happy with the price and the product. I searched their website for MX350 and found a set of replacement batteries for $21.80. The shipping charge was reasonable for such a heavy item.
Note: Both times I have ordered from batterysharks.com I checked out as a guest. I did not receive any order confirmation or update in my email. However the items arrived very quickly with no problems. But if you want to track your order you should probably create an account.
After connecting the batteries I was able to test the motor and it worked.
12 Volt, 7Ah sealed lead acid batteries from batterysharks.com
The batteries fit perfectly. I used quick-connect terminals to make the connections. The batteries are placed in series with a 30 Amp fuse. I used a metal bar to make a bracket to hold the batteries down.
The battery cables were missing which meant that I did not have the mating connector for the battery connection to the motor controller. I used an XT60 connector as a replacement. I cut the connector that came from the motor controller and replaced it with a male XT60. Then I soldered an XT60 female to the battery wires.
The motor controller connections are: 1) battery power 2) charging port 3) main power switch 4) motor 5) throttle 6) brake sensor
The brake handle performs 2 functions: it pulls on the brake cable to squeeze the brake on the rear wheel and it disconnects a switch which tells the motor controller to stop the motor. I think this is another safety thing to prevent braking while the motor is running.
Chain
Chain
The chain was rusted and several of the links were not pivoting. I soaked the chain in PB Blaster for several hours. Then I reconnected the chain and ran the motor while the bike was up on blocks. This helped to loosen up the links that were still sticking.
The chain connects the motor to the rear wheel. A spring tensioner keeps the chain in the right tension.
I didn't want to remove the rear wheel to get the chain off. So I took the chain off the motor sprocket and draped the chain down into this milk jug. I soaked the chain in PB Blaster. I let it sit for a few hours and then rotated the chain to soak the other half.
Brake
Brake
The brake cable was seized. I disconnected the cable where it connects to the brake at the rear wheel. I used a ladder and a stick to elevate the brake cable so that I could slowly drip oil into the cable. Every few hours I put a few drops of oil into the cable and let it gravity feed down through the cable. After doing this on and off throughout the day the cable began moving freely.
I disconnected the brake cable from the rear wheel. I elevated it so that I could add lubricant and let it gravity feed down through the cable.
I dripped 3 in 1 oil into the brake cable. I repeated the process every few hours.
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