3.Insert the gearbox into the coupling assembly.
4.Tip up the field and slide the gearbox/armature assembly into location.
5.Reseat the field and make sure the armature spins freely.
6.Remainder of assembly is the reverse of the removal procedure above.
MOTOR COUPLING REMOVAL / INSTALLA- TION
Removal
1.Remove the chuck as described above.
2.Remove the top housing half and gearbox as de- scribed above.
3.Remove the armature from the tool as described above.
4.The coupling is press fit onto the knurled end of the motor shaft. Remove the coupling using an arbor press or other suitable press. With the armature pointed upward, the coupling should be held from the bottom side and the armature pressed down.
Installation
1.Install a light film of moly based grease to the inside of the coupling – both in the large and small diameter bores.
2.Remainder of the installation is the reverse of the removal instruction above.
NOTE: It is very important that the coupling be lined up properly during installation. Failure to install the coupling straight will result in tool vibration.
MOTOR REMOVAL / INSTALLATION
Removal
1.Remove the chuck as described above.
2.Remove the top housing half and gearbox as de- scribed above.
3.Remove the armature from the tool.
4.Disconnect the black and white lead wires from the field and remove it. The thicker black jumper wire should not be disconnected
NOTE: During disassembly, take note of wire routing so the wires can be routed the same way upon reassembly. Also take note of the way the two dowel pins on the fan end of the field engage the lower housing.
Installation
1.Installation is the reverse of the removal instruction above.
SWITCH REMOVAL / INSTALLATION
Removal
1.Remove the chuck as described above.
2.Remove the top housing half as described above.
3.Remove the reversing shuttle from the top of the switch.
4.Disconnect the 4 leads from the reversing module (top portion) of the switch. These should slide straight up and disengage.
5.Loosen the two Phillips head machine screws on the side of the switch and remove the power cord wires.
6.The red brush wire installed in the bottom of the switch can be removed by pushing a small diameter pin in the wire opening. This will open the wire trap and the wire can be pulled out.
NOTE: Again, take note of the wire routing before disas- sembly so they can be properly routed upon reassembly.
Installation
1.Installation is the reverse of the removal instruction above.
CAUTION: It is extremely important that the wires that terminate in the reversing module of the switch be properly installed. When properly installed, the top of the terminals will be about flush with the top of the switch. Proper installation ensures adequate spacing between the switch terminals, which are live, and the gearbox, which is metal and has a conductive path to the chuck. Ensure that the spacing between the switch terminals and gearbox is adequate before reassembling the top housing half.
Terminals may not extend |
| |
beyond the top surface of | 100% inspect to see that the | |
the switch. | ||
terminal is pushed down all the | ||
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| way and that there are no | |
| excessive lumps of solder. |
Improper Switch Wire Assembly
100% inspect for proper connection.
When properly installed, the terminals on the switch wires are fllush with the top of the switch as shown in the pictures above.
Proper Switch Wire Assembly
3