Repairing a starter motor can be a cost-effective way to get your vehicle or equipment back up and running. Here are the steps to follow when repairing your starter motor:
Inspect Components: Check the armature, brushes, and clutch for signs of wear or damage. Check the armature for wear or damage by touching the permanent magnet. If the length of the measuring brush is shorter than the usage limit, replace the brush holder assembly.
Check the clutch: slide the overrunning clutch A along the shaft and replace it if it does not slide smoothly; fix the driving gear B and turn the overrunning clutch in the direction shown in the figure to ensure that it turns freely. Also make sure that the overrunning clutch is locked in the opposite direction. If it cannot be locked, replace the overrunning clutch assembly; if the starter drive gear is worn or damaged, replace the overrunning clutch assembly; the gears cannot be replaced separately. Check condition of torque converter ring gear. If the starter drive gear is damaged, replace it.
After prying up each brush spring with a screwdriver, center the brush outside the brush holder. Release the spring so it stays in place. Note that to place the new brushes, slide a strip of 500 or 600 grit sandpaper between the commutator and each brush, sand side up, and turn the armature smoothly. The contact faces of the brushes will be ground to the same profile as the commutator.
Install the plastic tube into the brush holder assembly; align the groove point C with the protruding part D, install the armature housing A and armature B; put the brush holder assembly on the armature, and then put the brush Frame A moves down onto the armature;Push each brush down until it sits on the commutator, then release the spring against the end of the brush, install the end caps to secure the brush holders.
Disassemble the Motor:
Remove the starter: Disconnect the motor cable from the M terminal, and remove the end cover;lace a plastic tube with an outer diameter of 29.4mm on the armature; fix the plastic pipe and move the brush holder A to the plastic pipe B so that the brush can not fall off the brush holder.
Inspect the Components:
Check the armature, brushes, and clutch for signs of wear or damage. Check the armature for wear or damage by touching the permanent magnet. If the length of the measuring brush is shorter than the usage limit, replace the brush holder assembly.
Check the clutch: slide the overrunning clutch A along the shaft and replace it if it does not slide smoothly; fix the driving gear B and turn the overrunning clutch in the direction shown in the figure to ensure that it turns freely. Also make sure that the overrunning clutch is locked in the opposite direction. If it cannot be locked, replace the overrunning clutch assembly; if the starter drive gear is worn or damaged, replace the overrunning clutch assembly; the gears cannot be replaced separately. Check condition of torque converter ring gear. If the starter drive gear is damaged, replace it.
Clean the Components: Use a commutator stone to clean the armature and commutator and remove any debris or build-up. The commutator is the copper segments that are located on the armature. Clean the brushes and bearings with a solvent to remove any dirt or debris that may be causing them to malfunction.
Reassemble the Motor: Once you have inspected and cleaned all the components, it’s time to reassemble the starter motor.After prying up each brush spring with a screwdriver, center the brush outside the brush holder. Release the spring so it stays in place. Note that to place the new brushes, slide a strip of 500 or 600 grit sandpaper between the commutator and each brush, sand side up, and turn the armature smoothly. The contact faces of the brushes will be ground to the same profile as the commutator.
Install the plastic tube into the brush holder assembly; align the groove point C with the protruding part D, install the armature housing A and armature B; put the brush holder assembly on the armature, and then put the brush Frame A moves down onto the armature;
Push each brush down until it sits on the commutator, then release the spring against the end of the brush
Install the end caps to secure the brush holders.
Test the Motor: Before reinstalling the starter motor, it’s important to test it to ensure that it’s functioning properly. Use a starter motor tester or a multimeter to test the motor’s windings and brushes for continuity and resistance. If the motor is not receiving power or is not functioning properly, it may need to be repaired or replaced.