Panasonic EY6931 - 15.6V HAMMER DRILL User manual

1 SCHEMATIC DIAGRAM 2
2 WIRING CONNECTION DIAGRAM 2
3 DISASSEMBLY INSTRUCTIONS 3
4 ASSEMBLY INSTRUCTIONS 5
©2000 Matsushita Electric Works Ltd. All rights
reserved. Unauthorized copying and distribution is a
violation of law.
EY6931
5 TROUBLESHOOTING GUIDE 8
6 TRIAL OPERATION 10
7 EXPLODED VIEW 11
8 REPLACEMENT PARTS LIST 12
Cordless Hammer Drill & Driver
SPECIFICATIONS
Capability Screw driving Machine screw M3.5 - M6
Wood screw Ø2.1 - Ø5.8mm (5/64"~ 15/64")
Drilling Mortal Brick Ø3 - Ø13mm (1/8" - 1/2")
Wood Ø3 - Ø36mm (1/8" - 1-27/64")
Metal Ø1.5 - Ø13mm (1/16" - 1/2")
Motor DC Motor 15.6V
No load speed LOW 80 - 550/min (rpm)
HIGH 300 - 2,000/min (rpm)
Blows rate per minute LOW 1,200 - 8,250/min (bpm)
HIGH 4,500 - 30,000/min (bpm)
Chuck capacity Ø1.5 - Ø13mm (1/16" - 1/2")
Maximum torque LOW 25.5Nm (260kgf-cm, 255in-lbs.)
HIGH 5.9Nm (60kgf-cm, 52in-lbs.)
Blow strength 1.7kN (170kgf, 370lbs.f)
Overall length 236mm (10-23/32")
Weight (with battery pack) 2.3kg (5.1lbs.)
CONTENTS
Page Page
ORDER NO. PTD0009U37C1

1 SCHEMATIC DIAGRAM
2 WIRING CONNECTION DIAGRAM
2
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3 DISASSEMBLY INSTRUCTIONS
3.1. HOW TO REMOVE KEYLESS DRILL CHUCK.
Ref. No. 1A Procedure 1A Removal of keyless drill chuck.
1. Set clutch handle to position .
2. Turn lock handle counterclockwise direction to open chuck jaws.
3. Use a screwdriver to turn chuck fastening screw inside chuck
clockwise direction of arrow, and remove the screw.
NOTE :
If chuck fastening screw will not come loose, insert an allen wrench
into chuck and lightly tap in clockwise direction with a hammer to
tighten chuck, and then loosen chuck fastening screw.
4. Insert an allen wrench into chuck, and turn counterclockwise direction in
arrow with holding main unit by vise to remove chuck.
3.2. HOW TO DISASSEMBLE MAIN UNIT.
(Housing AB set can be opened without disassembling chuck.)
Ref. No. 2A Procedure 2A Removal of housings.
1. Remove 9 housing screws.
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Ref. No. 2B Procedure 2A →
→→
→2B Removal or attachment of motor.
(Removal of motor.)
1. Remove motor with gear block from housing.
2. Separate motor from gear box block by twisting
motor to unlock tabs.
(Attachment for motor.)
3. Motor mounting base and positioning rib of gear
case should be set.
Ref. No. 2C Procedure 2A →
→→
→2B →
→→
→2C Removal of gear box block.
1. Set clutch handle B to position 1 before replacing
driving block from housing.
2. Loosen 3 screws of clutch handle A and remove
clutch handle from driving block.
3. Pull out 2 pins (Ø2×31.8) by pressing down on clutch
handle B and driving shaft.
4. After removing clutch handle B, internal parts of
driving block can be removed one after another.
driving shaft →spring →change plate (2pcs) →cam A
→vibration spring →click plate →adjust ring →clutch
spring →clutch plate →steel ball (12pcs) →roller pin
(6pcs)
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4 ASSEMBLY INSTRUCTIONS
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4.1. HOW TO ASSEMBLE DRIVING BLOCK AND GEAR CASE.
Ref. No. 3A Procedure 3A Assembly of driving block.
1. Assemble clutch plate, clutch spring and adjust ring to outside of clutch case. 2. The click plate has its own correct direction for proper
assembly.
Adjust (A) groove of clutch case to protrusion part of click
plate.
3. Assemble vibration spring and cam A into clutch case. 5. Insert spring to driving shaft and assemble them to clutch
case.
4. When assembling change plates, make sure that protrusion side of change
plates face inside of clutch case.
Ref. No. 3B Procedure 3A →
→→
→3B Assembly of clutch handle.
1. Set clutch handle B to position 1 toward dent part of clutch
case.
2. Insert 2 pins (Ø2×31.8) by pressing down clutch handle B
and driving shaft.
3. The change ring has its own correct direction. Confirm the
direction when change ring is inserted into clutch handle.
4. Select clutch handle B to position before assembling
clutch handle A to gear block.
5. Adjust protrusion parts of change plate with groove parts of
change ring inside of clutch handle A.
6. Tighten 3 screws of clutch handle A.
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Ref. No. 3C Procedure 3A →
→→
→3B →
→→
→3C Assembly of gear case
1. Reinstalling place 2pcs of steel balls into each of 6 holes.
2. Insert 6 pins into clutch case.
3. Assemble carrier, ring gear, 3 pieces of planet gear and
thrust plate.
4. Align the dent part of clutch case with positioning rib of gear
case. And tighten them with 4 screws.
5. Assemble ring gear B, carrier A, planet gear A, carrier B,
ring gear A, planet gear B and thrust plate.
NOTE :
Ring gear B has its own correct direction for proper
assembly.
6. Confirm proper position of High/Low change gear handle
when it is assembled. Both ends of spring must be put into
grooves of ring gear B.
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EY6931

(Refer to WIRING CONNECTION DIAGRAM.)
5 TROUBLESHOOTING GUIDE
5.1. CHECK POINTS FOR ELECTRICAL PARTS.
< TROUBLE > < CHECK > NO < REMEDY >
Does not operate. — <CHECK BATTERY PACK.> →Replace battery pack.
If no less than 15.6 V DC is available across the (+) and (-) terminals,
the battery pack is OK.
NOTE :
The battery pack is sold separately as an optional accessory.
See the nearest sales dealer for details. The battery pack has a
limited life. The pack should be replaced if
- after being charged for the rated charging time the battery
voltage is less than 15.6V DC or the usable time is extremely
short.
- the battery leaks. Check battery for leaks and terminals for
corrosion.
↓OK NO
<CHECK TERMINAL CONNECTIONS BETWEEN →Repair contacts.
MAIN UNIT AND BATTERY PACK.>
Check for proper terminal contacts.
↓OK NO
<CHECK SWITCH BLOCK.> →Contacts in switch
(See WIRING CONNECTION DIAGRAM.) block are defective.
Replace switch & FET
Check continuity between following terminals. block.
* Inspection of the forward / reverse selection switch. When switch
handle is depressed all the way :
- There should be 0Ωbetween (A) - (D) , and between (B) - (C) ;
when switch lever is set to forward side.
- There should be 0Ωbetween (A) - (C) , and between (B) - (D) ;
when switch lever is set to reverse side.
↓OK NO
<CHECK MOTOR.> →Replace motor.
The motor normally operates with its white (+) and black (-) lead wires
connected to 15.6V DC.
Ref.: motor rotating speed 17,700 ±1,500.
NO
Does not speed —<CHECK SWITCH BLOCK.> →Replace switch & FET
control. block.
Though FET block may be defective, FET block can not be replaced
without replacing switch block.
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EY6931

5.2. CHECK POINTS FOR DRIVING BLOCK.
< TROUBLE > < CHECK > NO < REMEDY >
Does not vibrate — <CHECK DRIVING SHAFT (CAM B) AND CAM A.> →Replace driving
or weakness of shaft or cam A.
vibration. Check wear condition of driving shaft (cam B) and cam A
(When setting inside of clutch case.
clutch handle
to .)
↓OK NO
<CHECK CHANGE PLATES.> →Replace change
plates.
Check wear condition of protrusion parts for both side of change plates.
NO
Weakness of —<CHECK CLUTCH HADNEL A.> →Replace clutch
clutch operation. handle A.
Check wear condition of torque changing cam inside of clutch handle A.
↓OK NO
<CHECK RING GEAR.> →Replace ring
gear.
Check wear condition of protrusion parts of ring gear.
↓OK NO
<CHECK ADJUST RING.> →Replace adjust
ring.
Check wear condition of tip parts of adjust ring.
NO
The bit-locking —<CHECK ROLLER AND CARRIER.> →Replace roller
function does not set or carrier.
work. Check wear condition of roller set and carrier.
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6 TRIAL OPERATION
(after checking TROUBLESHOOTING GUIDE.)
1.Check vibrating operation by setting clutch handle to , then touching bit on a board.
Impact rate per minutes : (HIGH) 4,500 - 30,000 b.p.m. (LOW) 1,200 - 8,250 b.p.m.
Impact strength : 1.7kN (170kgf)
2.Check clutch operation by setting clutch handle between 1-5.
Clutch torque : 5 steps (approx. 1.0 - 1.5 - 2.5 - 3.4 - 4.4 Nm)
(approx. 10 - 15 - 25 - 34 - 45 kg-cm)
3.Check rotation of clutch (without clutch operation) by setting to .
4.Check spped control in proportion to depression amount of switch handle.
Low : approx. 300 - 2,000 r.p.m.
High : approx. 80 - 550 r.p.m.
5.Check operation by selecting forward or reverse switch.
6.Check if 3 chuck claws open or close smoothly by turning lock handle.
Chuck : Ø1.5 - 13 mm
7.Screwdriver bit locks in place, check if it is locked and can be used as a manual screwdriver.
Torque : max. 25.5Nm (260kgf-cm)
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7 EXPLODED VIEW
EY6931
11

8 REPLACEMENT PARTS LIST
NOTE:
*A --- available as an optional accessory
*B --- only available as set
*C --- available individually
Ref. No. Part No. Part Name & Description Remarks Per Unit
1WEY6931K3078 HOUSING AB SET 1
2EYT103L6807 CHUCK FASTENING SCREW 1
3EY6930K7917 KEYLESS DRILL CHUCK 1
4EY6930K9157 SCREW *C K3-16 3
5EY6901H3227 CLUTCH HANDLE A 1
6EY509B0977 O-RING 1
7EY6901L0567 CHANGE RING 1
8EY6901L0357 PIN *B Ø2-31.8 2
9WEY6902H3257 CLUTCH HANDLE B 1
10 WEY6902L1137 DRIVING SHAFT 1
11 EY6900B0177 SPRING 1
12 EY6901L0907 CHANGE PLATE *B 2
13 EY6901L1387 CAM A 1
14 EY6901L0197 VIBRATION SPRING 1
15 EY6901L0457 CLICK PLATE 1
16 EY6901L0637 ADJUST RING 1
17 EY6901L0167 CLUTCH SPRING 1
18 EY6901L0577 CLUTCH PLATE 1
19 EY560B6967 STEEL BALL *B Ø5 12
20 EY6901L1797 CLUTCH CASE 1
21 EY6705L0377 ROLLER PIN *B Ø3.175*7.2 6
22 EY6901L1107 CARRIER 1
23 EY6901L1477 RING GEAR 1
24 EY6900B1347 PLANET GEAR *B 3
25 EY6200B0857 THRUST PLATE 1
26 WEY6902L1767 GEAR CASE 1
27 EY6930L9577 SCREW *C K3-12 4
28 WEY6902L1467 RING GEAR 1
29 WEY6902L1357 CARRIER 1
30 EY6200B1357 PLANET GEAR *B 3
31 EY6900B1127 CARRIER 1
32 EY6930B1457 RING GEAR 1
33 EY560B1367 PLANET GEAR *B 3
34 EY6901L0887 THRUST PLATE 1
35 WEY6931L1007 MOTOR 1
36 WEY6902L2567 RADIATING PLATE 1
37 WEY6902L6017 SEMS SCREW 2.6-7 1
38 WEY6931Y2007 SWITCH BLOCK 1
39 EY6230L6037 SEMS SCREW *C M3-5 2
40 EY6481L0207 DUST PREVENTIVE PLATE 1
41 EY6406Y3238 HIGH/LOW HANDLE 1
42 EY6481L0177 CLICK SPRING 1
43 WEY6402Y3247 F/R SELECTOR HANDLE 1
44 EY6930L0177 CLICK SPRING A 1
45 WEY6930K9218 SCREW *C K3-20 9
46 WEY6902L1458 GEAR BOX BLOCK 1
-WEY6931K8008 INDIVIDUAL BOX 1
-WEY6931K8108 OPERATING INSTRUCTIONS 1
** Battery Pack and Tool Case are available as an optional accessory. See the nearest sales dealer for details.
*** For replacement parts of charger, see the charger service manual.
Charger complete set is available as an optional accessory. See the nearest sales dealer for details.
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EY6931