Panasonic EY74A2 User manual

© Panasonic Corporation 2015. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
ORDER NO. PTD1507X58CE
Cordless Drill & Driver
Model No. EY74A2
Europe
Oceania
TABLE OF CONTENTS
PAGE PAGE
1 Warning -------------------------------------------------------------- 2
2 Specifications ----------------------------------------------------- 2
3 Troubleshooting Guide ----------------------------------------- 3
4 Disassembly and Assembly Instructions ---------------- 7
5 Wiring Connection Diagram ---------------------------------13
6 Schematic Diagram ---------------------------------------------13
7 Exploded View and Replacement Parts List -----------14

2
1Warning
Caution:
• Pb free solder has a higher melting point that standard solder; Typically the melting point is 50 - 70 °F (30 - 40 °C) higher.
Please use a soldering iron with temperature control and adjust it to 750 ± 20 °F (400 ± 10 °C). In case of using high temperature
soldering iron, please be careful not to heat too long.
• Pb free solder will tend to splash when heated too high (about 1100°F / 600 °C).
2 Specifications

3
3 Troubleshooting Guide
3.1. Troubleshooting Guide

4

5

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3.2. Trial Operation (after checking Troubleshooting Guide).
3.2.1. Assembly
• Confirm if there is no gap between housing A, B and C by pinching lead wires.
• There is no dust or deformation on battery terminals.
3.2.2. Operation
• Check whether the tool operates properly in both the forward and reveres directions.
• Press the light button on the operation panel to confirm that the LED lights up.
• Check whether the tool speed increases continuously as the trigger is gradually engaged.
• Rotate the clutch handle and check whether the clutch switches properly.
• Check if the rotation speed is normal rated value.
High: 1580/min (rpm) at 18V, 1350/min (rpm) at 14.4V
Low: 470/min (rpm) at 18V, 400/min (rpm) at 14.4V
• Pull the trigger all the way back and check whether the tool stops rotating immediately when it is released.
• Set the clutch handle to the [ ] mark and check whether the tool rotates without any clutch operation.
• Operate (rotate) the keyless chuck and check whether the chuck's three jaws move smoothly.
3.2.3. Integrity
• With the switch activated, shake the tool back and forth and up and down and verify that its sound does not change excessively.
• Check for the presence of any dirt or foreign matter from the repair process on the outside of the tool.

7
4 Disassembly and Assembly Instructions
* To reduce the risk of injury, always remove battery pack before removing/installing the tool.
* To assemble the tool, start with 4-9 and proceed to 4-1.
4.1. Removing the Plate Hook.
4.2. Removing the Keyless Chuck.
1. Remove the M4-14 screw.
2. Remove the plate hook.
1. Use a screwdriver to turn the chuck fastening screw inside the chuck
clockwise direction, and remove the screw.
* in case of the chuck does not come loose; NOTE:
If the chuck fastening screw will not come loose, insert the allen wrench
into the chuck and lightly tap in the clockwise direction to tighten the
chuck, and then loosen the chuck fastening screw.
2. Insert the allen wrench into the chuck, and turn counterclockwise
direction with holding the unit by the vise to remove the chuck.
NOTE:
If the chuck is broken, use a allen wrench and turn counterclockwise
direction to remove the chuck.

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4.3. Removing the Housing.
4.4. Removing the Interior Components.
1. Remove nine screws.
2. Remove housing B.
3. Remove the F/R selector handle.
4. Remove the operation panel.
5. Remove the square nut.
1. Remove the heat resistant tape and remove the interior components
from the housing A.
* Precautions when securing LED assembly in place using the resistant
tape.
Attach the heat resistant tape at the location shown in the figure below.
2. Remove the clutch handle, H/L change handle and click spring from
the gear block assembly.

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4.5. Removing the Switch Assembly, LED Assembly and Battery Terminal.
4.6. Removing the Gear Case Assembly from the Module Assembly.
1. Remove the 2-pin connector.
2. Remove the 6-pin connector.
3. Pull the faston terminal directly
out from the switch assembly.
* Exercise care not to bend the ter-
minal fitting.
4. Remove the lead wires from the
battery terminal.
Connecting and disconnecting the connector
* Precautions when attaching the connectors
Holding the motor assembly, remove the entire motor mounting plate,
including the gear box assembly from the motor assembly.

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4.7. Removing the Gear Case Assembly.
1. Rotate the motor mounting plate to the
left and remove it from the gear case.
2. Remove the thrust plate, planet gear
B, ring gear B, carrier B, planet gear A,
carrier A, and the ring gear A (in that
order).
3. Remove 4 screws.
4. Remove the gear case, stopper, thrust
plate, planet gear, ring gear, carrier, steel
balls, pin, cushion plate, lock plate, lock
ring, thrust plate, wave washer and
thrust plate (in that order).
5. Insert the jaws of snap ring into two
holes on the C-ring. Open the jaws and
lift up on the ring to remove it.
* The C-ring cannot be reused after
being repaired or otherwise adjusted.
6. Remove the driving shaft, thrust plate,
steel balls, thrust plate, adjust screw,
clutch spring and thrust plate from the
clutch case.
* Assembly precautions
1. Exercise care when attaching the lock ring, ring gear, stopper, and ring
gear A to align them in the proper orientation (as shown in the above figure).
2. When installing the gear case to the clutch case, be sure to align the pro-
truding ribs on the clutch case with the recessed ribs on the gear case.
3. When installing the motor mounting plate to the gear case, align and
engage the two protruded sections on motor mounting plate with the two
notches on the gear case, then turn the motor mounting plate clockwise until
a clicking sound is produced to ensure secure mounting.
4. When installing the adjusting screw, make sure that the narrow protrusion
is on the right and flush with the clutch case surface.
5. Precautions when applying the grease (ALVANIA).