Part Location Diagram of 638420-4 Makita Yoke Unit
See part 9 in the diagram
( Grid squares measure 1x1 inch )

Yoke Unit 638420-4

Manufactured by:
Makita
ERP Number:
ERP10153272
Part Number:
638420-4
Original Equipment Manufacturer ?
$83.16
Special Order

Easy 

15 - 30 mins 

(1 rated repair) ?

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Troubleshooting

This part works with the following brands:
  • Makita
This part works with the following products:
  • Saw
  • Leaf Blower / Vacuum

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Customer Repair Instructions

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Easy 

15 - 30 mins 

(1 rated repair) ?
  • 1
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Sorry, we couldn't find any existing installation instruction that matched.

Over used the tool, overheated the motor

Lucas from Eureka , Kansas

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers
Parts Used:
CB430, 638420-4, 619290-0
I was ripping a thick board for a while then forced to stop when loosing power and smoke emitting from the saw, thus overheated the motor. When the saw was taken apart, the armature had a wire melted in two. The wire had wore on the yoke unit tearing a deep groove and ultimately destroying it. I replaced the armature and yoke unit with ne w along with new carbon brushes even though the originals were ok. The unit came apart very easily and the parts fit perfectly. Probably would have only taken ten minutes to repair if I didnÆt clean dust from the disabled parts. The saw works perfectly as good or better than the day I bought it.
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Model Cross Reference

This part works with the following models:
ERP Number: ERP10153272
Manufacturer Part Number: 638420-4
Brand Model Number Description
Makita BCS550 Circular Saw - 18V LXT Lithium-Ion Cordless 5-3/8" Metal Cutting Saw
Makita BCS550F Saw - Saw
Makita BCS550Z Nibbler & Shears - 18V LXT Lithium-Ion Cordless 5-3/8" Metal Cutting Saw
Makita BPB180 Band Saw - Portable Band Saw
Makita BPB180F Saw - Saw
Makita BPB180Z Band Saw - 18V LXT Lithium-Ion Cordless Portable Band Saw
Makita BSS501 Circular Saw - 18V LXT Lithium-Ion Cordless 5-3/8" Circular Trim Saw
Makita BSS501F Saw - Saw
Makita BSS501Z Saw - Saw
Makita BUB360 Leaf Blower / Vacuum - Cordless Blower
Makita BUB360X Leaf Blower / Vacuum - Blower
Makita BUB360Z Leaf Blower / Vacuum - Blower
Makita BUB360Z2C Leaf Blower / Vacuum - Blower
Makita BUB360ZCX Leaf Blower / Vacuum - Blower
Makita UB360DWB Leaf Blower / Vacuum - 36v Lithium-Ion Cordless Blower Kit
Makita XBP02 Band Saw - 18V LXT Lithium-Ion Cordless Compact Band Saw Kit
Makita XBP02TX Saw - Saw
Makita XBP02Z Band Saw - 18V LXT Lithium-Ion Cordless Portable Band Saw
Makita XBU01 Leaf Blower / Vacuum - 18v X2 (36v) Lxt Lithium-Ion Cordless Blower Tool Only
Makita XBU01PM Leaf Blower / Vacuum - Blower
Makita XBU01PT Leaf Blower / Vacuum - Blower
Makita XBU01Z Leaf Blower / Vacuum - Blower
Makita XSC01 Saw - Saw
Makita XSC01M Circular Saw - 18v Lxt Lithium-Ion Cordless 5-3/8 Inch Metal Cutting Saw
Makita XSC01MB Saw - Saw
Makita XSC01T Saw - Saw
Makita XSC01Z Saw - Saw
Makita XSC03T Saw - Makita Xsc03t Parts
Makita XSC03Z Circular Saw - 18v Lxt Lithium-Ion Cordless 53/8 Inch Metal Cutting Saw, With Electric Brake And Chip Collector
Makita XSS03 Saw - Saw