- Aug 13, 2008
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INTRODUCTION:
My radiator fan started to give abnormal sound and by visual I saw that my fan seem 'heavy' to turn. To prevent it become worst, I searching for a motor at spare part shop but unfortunately I've been told it is not in the market anymore (really?). So, no other choice I search it at used parts (kedai potong). Luckily found it but not the exactly model and need to modify the electrical wire to suit with the original socket. It cost me RM212.00 (including G.S.T).
THE STORY:
After everything settle down, I looking at the original motor and thinking to open and look inside it. So, the story begin:
1. The Motor:
2. Twist this part little bit.
3. After twist here and there and slowly tap it with hammer, there we go:
4. Looking at the carbon brush still thick and the commutator still in good condition, next step - pull out the armature from the housing (It is felt 'heavy' to pull because of the magnet inside the housing):
5. After components dismantle and please take more precaution to the washer and the carbon brush spring:
6. The bearing seem not turning smooth and felt heavy to turn. I suspect this is the reason of the symptom of abnormal sound and fan heavy to turn.
7. Using the bearing puller, pull the bearing out from the shaft:
8. Clean the component (I just use liquid dish wash and brush it with toothbrush). After that, put it under the sun to make it really dry.
Went to buy the bearing and insert it to shaft. Since there is no proper tools, I just use a spanner (8 mm) and slowly tap it with hammer) and add more spanner
until the bearing at original position. (Note: to make it more easier, lube the shaft with WD40).
9. After bearing already at the original position and seem good, put back the armature in the housing (Note: don't forget the washer mentioned in paragraph 5):
10. To couple back the carbon brush parts are tricky because with the spring inserted in the slot, it will stuck with the commutator. So, I use the thread to hold back
the carbon brush and this will make easier to insert the commutator part (Note: don't forget the washer mentioned in paragraph 5):
11. After everything coupled, pull the thread slowly and this will release the carbon brush and make it contact with the commutator.
12. Reverse the step in paragraph 2 to make it really tight:
13. Test the motor by:
Blue - positive battery
Black - negative battery
Result: motor will turn
Blue+Yellow - positive battery
Black - negative battery
Result: motor will turn (normal speed)
Blue+Green - positive battery
Black - negative battery
Result: motor will turn (high speed)
CONCLUSION:
If the result at paragraph 13 as stated, no sound of abnormal and it turn smoothly then this means the repair successfully. For this project, i spending RM50.88 for the bearing puller (I've been told it will cheaper if you send it to engineering shop) and RM9.50 for the bearing. The total are RM60.38. It is lot cheaper compare to buy a second hand corroded motor and need to modify for RM212.00.
So, I hope this write up can give some guide if you are facing the same problem but I won't take responsible if anything goes wrong.
Sorry for terrible English but hope you can understand. Any comment are most welcome.
My radiator fan started to give abnormal sound and by visual I saw that my fan seem 'heavy' to turn. To prevent it become worst, I searching for a motor at spare part shop but unfortunately I've been told it is not in the market anymore (really?). So, no other choice I search it at used parts (kedai potong). Luckily found it but not the exactly model and need to modify the electrical wire to suit with the original socket. It cost me RM212.00 (including G.S.T).
THE STORY:
After everything settle down, I looking at the original motor and thinking to open and look inside it. So, the story begin:
1. The Motor:
2. Twist this part little bit.
3. After twist here and there and slowly tap it with hammer, there we go:
4. Looking at the carbon brush still thick and the commutator still in good condition, next step - pull out the armature from the housing (It is felt 'heavy' to pull because of the magnet inside the housing):
5. After components dismantle and please take more precaution to the washer and the carbon brush spring:
6. The bearing seem not turning smooth and felt heavy to turn. I suspect this is the reason of the symptom of abnormal sound and fan heavy to turn.
7. Using the bearing puller, pull the bearing out from the shaft:
8. Clean the component (I just use liquid dish wash and brush it with toothbrush). After that, put it under the sun to make it really dry.
Went to buy the bearing and insert it to shaft. Since there is no proper tools, I just use a spanner (8 mm) and slowly tap it with hammer) and add more spanner
until the bearing at original position. (Note: to make it more easier, lube the shaft with WD40).
9. After bearing already at the original position and seem good, put back the armature in the housing (Note: don't forget the washer mentioned in paragraph 5):
10. To couple back the carbon brush parts are tricky because with the spring inserted in the slot, it will stuck with the commutator. So, I use the thread to hold back
the carbon brush and this will make easier to insert the commutator part (Note: don't forget the washer mentioned in paragraph 5):
11. After everything coupled, pull the thread slowly and this will release the carbon brush and make it contact with the commutator.
12. Reverse the step in paragraph 2 to make it really tight:
13. Test the motor by:
Blue - positive battery
Black - negative battery
Result: motor will turn
Blue+Yellow - positive battery
Black - negative battery
Result: motor will turn (normal speed)
Blue+Green - positive battery
Black - negative battery
Result: motor will turn (high speed)
CONCLUSION:
If the result at paragraph 13 as stated, no sound of abnormal and it turn smoothly then this means the repair successfully. For this project, i spending RM50.88 for the bearing puller (I've been told it will cheaper if you send it to engineering shop) and RM9.50 for the bearing. The total are RM60.38. It is lot cheaper compare to buy a second hand corroded motor and need to modify for RM212.00.
So, I hope this write up can give some guide if you are facing the same problem but I won't take responsible if anything goes wrong.
Sorry for terrible English but hope you can understand. Any comment are most welcome.
