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Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)
Article Breakdown
Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)
Tools & Materials
If hammer drills and service bills are boring into your budget, it's time to face the fix. Whether you are a master carpenter or an occasional drill-seeker, eReplacementParts.com provides the parts, procedures and facts you need to fearlessly fix what fails you.
The switch in your cordless drill performs several functions: It turns the drill on, controls its speed, and enables you to select the direction of rotation. Common symptoms of a bad switch include a drill that doesnt turn on when the trigger is pulled; not being able to change the direction of rotation; and no longer having variable speeds.
It is also fairly common for a bad switch to create smoke when it is activated, especially if the switch has been overheated. If you suspect the switch in your drill has been overheated, remove the housing and inspect it. You will usually see melted plastic on the switch or the surrounding wires. This article provides step-by-step instructions for removing and installing the switch on a Makita cordless hammer drill.
Let's get started. REMOVING THE SWITCH [top] 1. Remove the battery.
Remove the battery from the drill.
2. Remove the rear cover.
Remove the (2) screws.
Remove the rear cover from the drill.
3. Split the housings.
Remove the screws from the top half of the housing.
Lift the top half of the housing away from the unit.
4. Disconnect the switch wires.
Lift the switch assembly out of the housing.
Remove the forward/reverse change lever from the switch (or from the housing).
Note the location of the wires prior to disassembly.
Disconnect the (2) wires from the top of the switch assembly. (Disconnect only the flag terminals. The soldered wires (on the lower portion of the switch) are part of the switch assembly and do not require removal).
5. Remove the heat sink.
Lift the heat sink out of the housing.
Remove the screw securing the heat sink to the switch.
Remove the heat sink from the switch assembly.
6. Remove the terminal.
Slide the terminal block out of the housing.
Note location of the wire connections prior to disassembly.
Disconnect the (3) wires from the terminal assembly.
Remove the terminal from the unit.
7. Remove the switch.
Disconnect the LED supply wire (by depressing the center tab and separating the two halves of the plastic connector).
Remove the switch assembly from the housing.
INSTALLING THE NEW SWITCH [top] 8. Connect the LED wire.
Place the new switch assembly in its approximate position within the housing.
Connect the LED supply wire to the new switch.
9. Install the terminal block.
Connect the (black) wire to the (negative) post on the terminal.
Connect the (red) wire to the (positive) post on the terminal.
Connect the (yellow) wire to the (center) post on the terminal.
Install the terminal assembly into the housing.
10. Attach the heat sink.
Attach the heat sink to the new switch.
Secure the heat sink to the switch with the screw.
11. Connect the switch wires.
Connect the (red) wire to the (M1) terminal on the new switch.
Connect the (black) wire to the (M2) terminal on the new switch.
12. Install the switch.
Align the notch on the forward/reverse change lever with the post on the switch.
Install the switch (and F/R change lever) into the lower half of the housing.
Tuck the switch wires into the channels on the housing.
REASSEMBLING THE UNIT [top] 13. Reinstall the heat-sink.
Install the heat-sink into the lower half of the housing.
Verify that the wires (extending from the heat-sink) are positioned on the switch-side of the plastic post (not on the motor-side).
14. Reinstall the top half of the housing.
Inspect all of the wires for potential pinch-points; make adjustments as necessary.
Reinstall the top half of the housing.
Secure the housing with the screws.
15. Reinstall the rear cover.
Install the rear cover.
Secure the rear cover with the (2) screws.
16. Reinstall the battery.
Install the battery.
As you just learned, fixing things yourself means more drilling with less billing. Hopefully, this article has restored your ability to drill holes without replacing your whole drill. And that's just the tip of the bit. Our online repair guides can help expand your skills far beyond drills; empowering you to face power tool problems whenever they arise; and to fearlessly fix whatever fails you.