Crank bracket bearing repair

I found this exploded view, will this help you?
I can't see the part you're talking about.
https://www.ereplacementparts.com/proform-pfel539090-elliptical-parts-c-149445_149446_149517.html

hi the crank bearings have gone

It is according to what your crank design is.
1st. design. This is a solid crank. Look at your crank. One side will have a nut, and a race with slots in it. If this is yours then you take off the pedal on the side of the nut. Now take off the nut, use a screwdriver to remove the race. Pull that bearing out, then push the crank through the opening, removing the other bearing. If you have a multiple speed bike you have to remove the sprockets first.

2nd design. After removing the sprockets there is a bolt holding the crank arms on the shaft that the bearing are on. Remove the cranks and then remove the bearings the same as above.

Sounds like a bearing issue in the "bottom bracket" or the housing that holds the cranks, in other words. I would remove the crank and inspect the bearings. There are several different types of bearings. If your bike uses sealed bearings, your only option is usually to just replace them. a "caged" bearing consists of several actual ball bearings, set into a round metal cage that holds them in place. If you have caged bearings, remove them clean them thoroughly, and then re-pack them with bearing grease before reinstalling. also be sure to clean the bearing cups, or any surface that they may come into contact with. Any dirt, sand, or grit makes for a quick death for your bearings. Some bikes just use free floating ball bearings set into the bearing cups. If this is the case, smear a blob of grease into the bearing cups. This will hold the ball bearings in place while you install the rest of them. Be careful when re-inserting the crank not to knock any of the ball bearings down into the bottom bracket. From the sounds of your description, you may be missing a ball bearing or two. Check to make sure there are no large spaces between any two ball bearings. If you could fit another ball bearing into the bearing cup without crowding any of the others out, then you are missing a bearing. Re-assemble everything as it came apart. When tightening the crank into the bottom bracket, be cautious not to over tighten. The crank arm shouldn\'t have any "wiggle" from side to side, and yet should still spin freely on its bearings. I sincerely hope this helps.

follow this steps and fix it. God bless you
Use a flat screwdriver to unseat the tabs that hold the front top cover in place. This will expose the flywheel and pedal arm connection points. Rotate the flywheel by hand and determine whether lubrication will accomplish the repairs. If the bearings are exposed, use a grease gun with an extension nozzle and lubricate both bearings with lithium grease. If the bearings are damaged or sealed, proceed to the next step.

2

Remove the front and side covers on the main frame. Hold the flywheel with one hand and use a box wrench to loosen the bolts that secure the pedal arms at each side of the flywheel. Pull the arms away from the flywheel and remove the bearings from each side.

3

Test the bearings as before. Lubricate exposed bearings with lithium grease and reinstall them. Sealed bearings must be replaced. Reattach the pedal arms to the flywheel. Replace the main frame covers and front top cover to complete the repairs.
Lubrication

1

Detach the ends of the pedals from the crank axles. Spread a layer of machine grease over the crank axles, then reattach the ends of the pedals.

2

Remove the bolts connecting the pedals to the swing arms. Detach the pedals from the arms, then spread a layer of machine grease over the axles on the swing arms. On some models, the bolts may also serve as the axles. Reattach the pedals to the arms.

3

Remove the bolts connecting the swing arms to the elliptical's upright. Detach the swing arms from the upright, then spread a layer of machine grease over the axles on the upright. Reattach the arms to the upright.
Drive Belt

1

Remove the screws or bolts securing the ends of the pedals to the crank axles. Slide the ends of the pedals off the axles. Remove any screws or bolts securing the left and right disc shields to the base unit. Pull or pry the disc shields off the base unit and set them aside.

2

Remove any screws or bolts securing the left and right side shields to the base unit. Detach the side shields and set them aside. Examine the interior of the base unit and locate the drive belt.

3

Pull the drive belt free of the crank pulley, flywheel and any other pulleys. Discard the old drive belt and install a new belt in its place. Turn the crank axles by hand to confirm that the belt will turn smoothly when the device is in use.

follow this steps and fix it. God bless you
Remove the screws or bolts securing the ends of the pedals to the crank axles. Slide the ends of the pedals off the axles. Remove any screws or bolts securing the left and right disc shields to the base unit. Pull or pry the disc shields off the base unit and set them aside.

2

Remove any screws or bolts securing the left and right side shields to the base unit. Detach the side shields and set them aside. Examine the interior of the base unit and locate the drive belt.

3

Pull the drive belt free of the crank pulley, flywheel and any other pulleys. Discard the old drive belt and install a new belt in its place. Turn the crank axles by hand to confirm that the belt will turn smoothly when the device is in use.
Detach the ends of the pedals from the crank axles. Spread a layer of machine grease over the crank axles, then reattach the ends of the pedals.

2

Remove the bolts connecting the pedals to the swing arms. Detach the pedals from the arms, then spread a layer of machine grease over the axles on the swing arms. On some models, the bolts may also serve as the axles. Reattach the pedals to the arms.

3

Remove the bolts connecting the swing arms to the elliptical's upright. Detach the swing arms from the upright, then spread a layer of machine grease over the axles on the upright. Reattach the arms to the upright.
Use a flat screwdriver to unseat the tabs that hold the front top cover in place. This will expose the flywheel and pedal arm connection points. Rotate the flywheel by hand and determine whether lubrication will accomplish the repairs. If the bearings are exposed, use a grease gun with an extension nozzle and lubricate both bearings with lithium grease. If the bearings are damaged or sealed, proceed to the next step.

2

Remove the front and side covers on the main frame. Hold the flywheel with one hand and use a box wrench to loosen the bolts that secure the pedal arms at each side of the flywheel. Pull the arms away from the flywheel and remove the bearings from each side.

3

Test the bearings as before. Lubricate exposed bearings with lithium grease and reinstall them. Sealed bearings must be replaced. Reattach the pedal arms to the flywheel. Replace the main frame covers and front top cover to complete the repairs.

If it clunks once per revolution, it could be the crank bearings. The brake would make a more rapid noise due to the way it is geared.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/russell_1d1c35fa8a5a0be4

see this steps and fix it. God bless you
Pedal Arms 1

Use a flat screwdriver to unseat the tabs that hold the front top cover in place. This will expose the flywheel and pedal arm connection points. Rotate the flywheel by hand and determine whether lubrication will accomplish the repairs. If the bearings are exposed, use a grease gun with an extension nozzle and lubricate both bearings with lithium grease. If the bearings are damaged or sealed, proceed to the next step.
2

Remove the front and side covers on the main frame. Hold the flywheel with one hand and use a box wrench to loosen the bolts that secure the pedal arms at each side of the flywheel. Pull the arms away from the flywheel and remove the bearings from each side.
3

Test the bearings as before. Lubricate exposed bearings with lithium grease and reinstall them. Sealed bearings must be replaced. Reattach the pedal arms to the flywheel. Replace the main frame covers and front top cover to complete the repairs.
Link Arms 1

Unplug the power cord. Identify the pivot points where the lower handlebars and the footpad link arms connect at each side of the machine. Use a screwdriver to remove the inside and outside elbow covers at each connection. This will expose the pivots.
2

Put a box wrench on the lock nut at the inside of one pivot and loosen the bolt with an Allen wrench. Remove the bolt and check the assembly for nylon spacers or a bearing. If no spacer is found, proceed to the next step. Replace the nylon spacers, reassemble the connection and reattach the elbow covers. Repeat this at the opposite side of the machine.
3

Have an assistant hold a deep socket against the inside face of the pivot hub. Make sure the socket is large enough to allow the bearing to pop out. Insert the point of a flat screwdriver into the outside of the hub until it contacts the bearing. Tap the handle of the screwdriver with a hammer to remove the bearing. Repeat this to remove the bearing on the opposite side.
4

Hold each bearing next to one ear and turn the inner race with your finger. If you hear grinding noises or the bearing is rough, it must be replaced. Lubricate the bearing with lithium grease and a grease gun. Replace the bearing into the hub. Reattach the lower handlebars and footpad link arms and put the elbow covers on.

Lubrication 1

Detach the ends of the pedals from the crank axles. Spread a layer of machine grease over the crank axles, then reattach the ends of the pedals.
2

Remove the bolts connecting the pedals to the swing arms. Detach the pedals from the arms, then spread a layer of machine grease over the axles on the swing arms. On some models, the bolts may also serve as the axles. Reattach the pedals to the arms.
3

Remove the bolts connecting the swing arms to the elliptical's upright. Detach the swing arms from the upright, then spread a layer of machine grease over the axles on the upright. Reattach the arms to the uprigh

see the next video:



sincerely. God bless you