Makita Power Screwdriver AR410HR User Manual

ECHNICAL INFORMATION  
PRODUCT  
T
P 1/20  
Models No.  
Description  
AR410HR  
L
Pneumatic Auto Feed Coil Screwdriver  
CONCEPT AND MAIN APPLICATIONS  
Model AR410HR is a pneumatic screwdriver powered by high pressure air.  
Drives coil type collated drywall screws exactly to depth and fastens plasterboard  
securely to wood/metal drywall stud.  
H
Its main benefits are:  
Compact body for easy handling and high maneuverability  
High power allowing to fasten plasterboard securely to metal stud  
of even 0.8mm thick steel plate without unseated screw  
Optimum for operation in job sites among residential area  
thanks to low-noise air exhaust  
W2  
W1  
Dimensions: mm  
Rigid contact arm enabling to make fine finish constantly  
Length (L)  
296  
142  
116  
305  
Width 1 (W1)  
Width 2 (W2)  
Height (H)  
Width 1: with Hook  
Width 2: without Hook  
Specification  
Plastic sheet collated drywall screws  
(coil type)  
Screw type  
Wood backing  
Metal backing  
3.8 (Coarse thread)  
3.5 (Fine thread)  
Shank diameter:  
mm  
Screw  
Length: mm  
Screws per coil  
25, 28, 32, 41  
100 screws  
100 screws  
Magazine capacity  
Operating air pressure: MPa  
1.76 - 2.26  
(18 - 23)  
(kgf/cm2)  
Pressure regulator valve  
Fire mechanism  
Yes  
Bump-fire*1/ Sequential*2  
Driving depth adjustment  
Trigger lock-off function  
Net weight: kg  
Yes (by dial)  
Yes  
1.9  
*1: Screws can be driven one after the other continuously first by pulling Trigger then by  
bumping Contact arm against workpiece with the Trigger being pulled.  
*2: One screw is driven first by pushing Contact arm against workpiece, then by pulling  
Trigger with the Contact arm kept pushed; screw cannot be driven when the steps are  
reversed. Another one can be driven by releasing Trigger, then by repeating the steps;  
however, cannot be driven if Trigger is not released before repetition of the steps.  
Standard equipment  
Hook ................................................................. 1  
Safety goggles ................................................... 1  
Oil supply (containing 30ml of turbine oil) ...... 1  
Hex wrench 4 ................................................... 1  
Driver bit .......................................................... 1  
Plastic carrying case ......................................... 1  
Note: The standard equipment for the tool shown above may vary by country.  
Optional accessories  
Plastic sheet collated drywall screws (coil type)  
[3.5mm shank diameter: 25, 28, 41mm; 3.8mm shank diameter: 25, 28, 32, 41mm]  
Air hose  
Air leak repair set  
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P 3/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-1. Fastening Torque for Bolts ans Scerws  
Tighten the bolts and scerws to the required fastening torque.  
* Apply a little amount of Loctite 242 or Three Bond 1321/1342 to the threaded portion of 77 Plug.  
Fastening  
torque  
Item No.  
1
Description  
Q’ty  
Used for  
(N.m)  
M5x80 Hex socket head bolt  
M4x8 Hex socket button head bolt  
M5x30 Hex socket head bolt  
4
1
4
Fastening Top cap and Top cap spacer to Housing  
Fastening Knob to Change valve  
8.0  
2.5  
8.0  
3
76  
Fastening Inlet cap to Housing  
77  
93  
Threaded portion of Plug  
M5x22 Pan head screw  
1
1
1
2
1
Fastening Inlet and Inlet cap 9 to Housing  
Fastening Hook to Hook base  
7.0  
2.5  
2.5  
8.0  
2.5  
119  
121  
128  
M5x16 Hex socket head bolt  
M5x12 Hex socket head bolt  
M5x28 Hex socket head bolt  
Fastening Contact arm cover to Driver guide complete  
Fastening Driver guide complete to Housing  
Fastening Magazine and Hook base to Housing  
Fig. 2  
1
3
Knob  
Top cap  
Change valve  
Inlet cap  
76  
128  
Top cap spacer  
77  
93  
Cap 9  
Housing  
Hook base  
Hook  
M5 Hex nut  
Driver guide gasket  
119  
Contact arm cover  
Driver guide complete  
121  
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P 4/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-2. Top Cap Section  
DISASSEMBLING  
1) After removing Top cap and Top cap spacer from Housing, remove Head valve and Cylinder stay from Top cap  
using air duster to blow air into the space between Top cap and Head valve using air pressure. (Fig. 3)  
2) Remove Knob from Top cap, then disassemble the other parts from Top cap as illustrated in Fig. 4.  
Fig. 3  
1. By removing four M5x80 Hex socket head bolts  
using 1R299, separate Top cap, Top cap spacer  
and Top cap gasket from Housing. Then remove  
Top cap and the other Top cap gasket from  
Top cap spacer.  
2. Turn Top cap upside down, then press down Head valve  
and Cylinder stay firmly into Top cap with your palm  
to make the air pressure as possible.  
While pressing down Head valve and Cylinder stay,  
insert nozzle of air duster into the hole of Top cap.  
M5x80  
Hex socket  
head bolt  
(4 pcs)  
Nozzle of air duster  
Insert nozzle of air duster  
into this hole.  
Head valve  
Cylinder stay  
Top cap  
Top cap  
Top cap spacer  
Top cap gasket  
3. By blowing air into the space between Top cap and  
Head valve through the hole, Cylinder stay and  
Head valve can be separated from Top cap.  
Cylinder stay  
Head valve  
Fig. 4  
By removing M4x8 Hex socket button head bolt and Knob,  
the inner parts can be removed from Top cap as illustrated below.  
M4x8 Hex socket  
button head bolt  
(1 pc)  
Conical compression spring 10-15  
O Ring 6  
Knob  
Change valve  
Flat washer 19  
Rear cushion  
O Ring 22  
Seal ring 22  
Compression  
spring 4 (8 pcs)  
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P 5/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-2. Top Cap Section  
ASSEMBLING  
1) Assemble Top cap section as described in Figs. 5, 6.  
2) Assemble O rings to Cylinder stay and Head valve as described in Fig. 7.  
Fig. 5  
Set Knob on Top cap, with the protrusion on  
its back fitting in either click-stop concave  
portions on Top cap.  
Assemble Conical compression spring 10-15 to Top cap  
with the small end on Change valve side.  
Then assemble Change valve to Top cap.  
Then assemble O ring 6 to the insertion hole  
for Change valve.  
Note: When assembling Change valve to Top cap, place the  
notch on the front side of Top cap as illustrated below  
so that Change valve can engage with Knob easily.  
Knob  
protrusion  
Knob  
M4x8 Hex socket  
button head bolt  
Rear side  
click-stop concave  
portion  
Top cap  
Front side  
Conical compression  
spring 10-15  
Change valve  
O Ring 6  
Rear side  
notch  
Front side  
Fig. 6  
Fig. 7  
After mounting O ring 22 and Flat washer 19 on Rear cushion,  
assemble Rear cushion to Top cap, then assemble Seal ring to  
Top cap.  
Before assembling Cylinder stay and Head valve  
to Top cap, mount O rings to them as illustrated  
below, then apply such an amount of IDOFLEX  
grease that they are covered with a thick layer of  
the grease.  
Top cap  
O Ring 54  
Flat washer 19  
Cylinder stay  
Rear cushion  
O Ring 22  
Seal ring  
O Ring 47  
O Ring 40  
Set Compression spring 4 (8 pcs)  
in the big diameter holes of Top cap.  
Head valve  
Compression  
spring 4  
Top cap  
O Ring 45  
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P 6/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-2. Top Cap Section  
ASSEMBLING  
3) Assemble Head valve and Cylinder stay to Top cap (left in Fig. 8); assembling of Top cap section is now completed.  
Then assemble Top cap section, Top cap spacer and Top cap gasket to Housing as illustrated on right in Fig. 8.  
Fig. 8  
Assemble Head valve by pressing straight down  
into Top cap.  
Top cap spacer and two Top cap gaskets are directional  
when assembled to Housing.  
Then assemble Cylinder stay to Top cap.  
Make sure that the holes A, B, C are aligned with the hole  
of Housing.  
M5x80 Hex socket  
head Bolt (4 pcs)  
Top cap section  
Head valve  
Top cap  
A
Top cap gasket  
B
Note: Be careful not to fall down the eight  
Compression springs set in Top cap.  
Top cap spacer  
C
Top cap gasket  
Housing  
Cylinder stay  
[3]-3. Driver Bit  
DISASSEMBLING  
1) Disassemble Top cap and Top cap spacer from Housing as described on left in Fig. 3.  
2) Disassemble Driver bit as described in Fig. 9.  
Fig. 9  
Remove Driver bit by pushing it  
from Driver guide complete side.  
After removing Rubber ring 19 (white), pull off Pin 3.  
Main piston and Piston cap can now be removed  
as illustrated below.  
Driver guide complete  
Rubber ring 19  
(white)  
Piston cap  
Driver bit  
Pin 3  
Main piston  
Main piston  
Driver bit  
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P 7/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-3. Driver Bit  
ASSEMBLING  
Do the reverse of the disassembling steps.  
Note: Be careful with the following:  
Piston cap is directional when assembled to Driver bit. (Fig. 10)  
Align Driver bit with the hole of Carrier complete when assembling Driver bit to the machine. (Fig. 11)  
Fig. 10  
Fig. 11  
Align the flats of Driver bit with the hole of Carrier complete.  
[Correct]  
[Wrong]  
Driver bit  
[sectional view]  
With the stepped face up  
Stepped face  
flats  
Piston cap  
Driver bit  
Carrier complete  
[sectional view]  
Hole for Driver bit  
insertion  
[3]-4. Cylinder Section  
DISASSEMBLING  
1) Disassemble Top cap and Top cap spacer from Housing as described on left in Fig. 3.  
2) Disassemble Cylinder section as described in Fig. 12.  
Fig. 12  
Disassemble Cylinder section from  
Housing as illustrated below.  
Remove Outer cylinder from  
Separator by pulling them in  
opposite directions.  
Cylinder section can now be  
disassembled as illustrated below.  
Cylinder section  
Separator  
Cylinder  
Outer cylinder  
Separator  
Cushion ring  
Cushion guide  
Front cushion  
assembly  
Front cushion, Cushion ring  
can be replaced in this step.  
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P 8/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-4. Cylinder Section  
DISASSEMBLING  
3) Sealing rings can be removed from Outer cylinder, Separator, Cylinder, Cushion guide and Front cushion assembly  
as illustrated in Fig. 13.  
4) From Outer cylinder, remove Cylinder seal as described in Fig. 14.  
Fig. 13  
Fig. 14  
Remove Cylinder seal from Outer cylinder  
Cylinder seal  
Rubber ring 23  
by levering it up with a slotted screwdriver.  
O Ring 25  
Outer cylinder  
Cylinder seal  
O Ring 54  
Cylinder  
O Ring 31.5  
O Ring 30  
Cushion guide  
O Ring 12.5  
Separator  
Front cushion  
assembly  
O Ring 45  
O Ring 11  
O Ring 12  
Outer cylinder  
ASSEMBLING  
Do the reverse of the disassembling steps. (Figs. 14, 13, 12, 3)  
[3]-5. Air Motor Section  
DISASSEMBLING  
1) Disassemble Top cap and Top cap spacer from Housing as described on left in Fig. 3.  
2) Disassemble Cylinder section as described in Fig. 12.  
3) Disassemble Air motor section from Housing, then remove Internal spur gear 44 as described in Fig. 15.  
Fig. 15  
Disassemble Air motor section from the machine by hitting  
the end surface of Housing with mallet.  
Then remove Internal spur gear section.  
After removing Spur gear 10 (5 pcs),  
remove the assembly of Carrier complete and  
Ball bearing 6001LLU from Internal spur gear 44  
by pushing it in the direction of the arrow.  
Outer separator  
Spur gear 10  
Air motor section  
Flat washer 15  
Internal spur gear 44  
Carrier complete  
Ball bearing 6001LLU  
Do not remove the assembly  
by pushing it in the opposite  
direction, or the teeth of  
Internal spur gear  
section  
Internal gear 44 will be damaged.  
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P 9/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-5. Air Motor Section  
DISASSEMBLING  
4) Disassemble Air motor section and remove Rotor and Upper drum cap as described in Fig. 16.  
5) Rotor can be disassembled as described in Fig. 17.  
Fig. 16  
Remove Outer separator, Inner separator  
and Spur gear 21 from Air motor section.  
Remove O rings from Outer  
separator and Inner separator.  
Remove Rotor by tapping  
the drive-end of Rotor shaft.  
Upper drum cap  
Rotor  
Outer separator  
Inner separator  
O Ring 45  
Outer separator  
O Ring 31.5  
Upper  
drum cap  
O Ring 17  
Air motor  
Drum  
section  
Drum  
Inner separator  
Lower drum cap  
O Ring 16  
Lower  
drum cap  
Spur gear 21  
In this step, Ball bearing 689ZZ  
still remains in Lower drum cap.  
Fig. 17  
Damaged or worn Blades can be replaced  
in this step.  
Ball bearing 689 ZZ can be removed from Upper drum cap  
using Rotor as illustrated below.  
Note: Five Blades have to be replaced  
simultaneously.  
Hexagonal end  
of Rotor shaft  
Rotor  
Blade  
Round end  
of Rotor shaft  
Rotor  
Ball bearing  
689 ZZ  
Remove Rotor from Upper drum cap using 1R045  
and 1R346.  
Upper drum cap  
In this step, Ball bearing 689ZZ still remains in  
Upper drum cap.  
Upper drum cap  
O Ring 9 can be removed  
from the opposite side of  
Ball bearing 689ZZ.  
1R045  
1R346  
O Ring 9  
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P 10/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-5. Air Motor Section  
DISASSEMBLING  
6) Spring pin 2.5-5 and Ball bearing 689ZZ can be removed as described in Fig. 18.  
Fig. 18  
Separate Lower drum cap  
from Drum.  
Removing Spring pin 2.5-5 from Drum  
Clamp Spring pin 2.5-5 in vise, then pull up Drum while swiveling it  
left and right. The other pin on the opposite side can be removed the same way.  
Drum  
Spring pin 2.5-5  
Spring pin  
2.5-5  
Lower drum cap  
Removing Ball bearing 689ZZ from Lower drum cap  
Remove O ring 9 from  
Lower drum cap.  
Turn Lower drum cap upside down, then pull off Ball bearing 689ZZ  
using Rotor as illustrated below.  
Hexagonal end  
of Rotor shaft  
O Ring 9  
Rotor  
Round end  
of Rotor shaft  
Ball bearing  
689ZZ  
Ball bearing  
689 ZZ  
ASSEMBLING  
1) Assemble Rotor to Upper drum cap as described in Fig. 19.  
Fig. 19  
1. After assembling O ring 9 on Upper drum complete,  
put Ball bearing 689ZZ in Upper drum cap.  
Then, using arbor press and 1R027, press down the Ball bearing  
and Upper drum cap altogether on Rotor shaft until they stop.  
Note:  
Apply the tapered end of 1R027 to the Ball bearing.  
Round end of Rotor shaft has to be inserted into the Ball bearing.  
3. Rotate Rotor by hand, and check if  
Rotor rotates smoothly.  
1R027  
Ball bearing  
689 ZZ  
Tapered end  
Upper drum cap  
Round end  
of Rotor shaft  
O Ring 9  
2. After assembling Rotor to  
Upper drum cap, mount five  
Blade to Rotor.  
Rotor  
It may be a little bit tight to rotate Rotor.  
However, this is not a trouble.  
The tightness is caused by O ring 9  
correctly set in Upper drum cap.  
Blade  
(5 pcs)  
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P 11/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-5. Air Motor Section  
ASSEMBLING  
2) Assemble Upper drum cap to Drum as described in Fig. 20.  
Fig. 20  
Assemble Spring pin 2.5-5 (2 pcs) to Drum.  
Then set Upper drum cap on Drum,  
with Spring pin 2.5-5 of Drum fitting in the  
corresponding insertion hole of Upper drum cap.  
Visually check if Upper drum cap is properly set on Drum.  
If properly set, two holes of Drum can be seen through the  
sausage-shaped hole of Upper drum cap.  
[Top view]  
Spring pin 2.5-5  
Upper  
drum cap  
Upper  
drum cap  
sausage-shaped  
hole  
two holes  
Drum  
Drum  
3) Assemble Lower drum cap to Drum as described in Fig. 21.  
Fig. 21  
2. Support Drum with 1R027 at the Ball bearing 689ZZ  
of Lower drum cap. Then apply another 1R027 to the  
Ball bearing 689ZZ in Upper drum cap, and firmly  
assemble Upper drum cap and Lower drum cap to  
Drum by pressing down Upper drum cap and Drum  
using arbor press until they stop.  
1. Assemble Ball bearing 689ZZ to Lower drum cap  
using 1R027 and arbor press.  
Set Drum on Lower drum cap, with Spring pin 2.5-5  
of Drum fitting in the corresponding insertion hole  
of Upper drum cap.  
1R027  
1R027  
Drum  
Ball bearing  
689ZZ  
Upper  
drum cap  
Lower drum cap  
1R027  
3. Assemble Spur gear 21 to the hexagonal  
end of Rotor shaft protruding from Lower  
drum cap.  
4. Assemble Internal spur gear section to Air motor section,  
with the ribs of Internal spur gear 44 fitting in the cut  
portion of Lower drum cap.  
Lower drum cap  
Spur gear 21  
Lower  
cut portion  
drum cap  
Air motor  
section  
ribs with larger  
Upper  
drum cap  
intervening width  
Flat washer 15  
Internal spur gear 44  
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P 12/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-5. Air Motor Section  
ASSEMBLING  
4) Assemble Air motor section to Housing as illustrated in Figs. 22, 23.  
Fig. 22  
[Top view]  
Carrier complete  
Driver bit  
Hole A:  
insertion hole  
for Driver bit  
Carrier complete  
Hole A  
Ribs A  
Internal gear 44  
1. First, for easy assembling, make the following adjustment:  
Insert Driver bit into Hole A of Carrier complete.  
Then, by turning Driver bit, set Hole A vertical  
(or horizontal) to Ribs A of Internal gear 44.  
Note: Ribs A cannot be seen when assembling Air motor  
section to Housing although alignment of Ribs A  
with Rib B (See Fig.23) of Housing is required.  
This adjustment will be able to know the position  
of Ribs A from that of Hole A.  
Ribs A:  
with larger  
intervening width  
1R273  
Fig. 23  
2. Hold Housing over Air motor section on 1R273.  
3. Make sure that Air motor section  
In order to fit Rib B (located on Grip side inside Housing)  
in Ribs A, while watching Hole A through Hole B of  
Housing, turn Housing or Air motor section so that Hole A  
is positioned vertical (or horizontal) to Grip.  
is properly assembled to Housing  
by measuring the depth indicated  
in the illustration below.  
The depth will be approximately  
43.5mm if properly assembled.  
Put Housing down over Air motor section until it stops.  
Rib B:  
located on  
the inside surface  
Housing  
Upper drum cap  
of Housing end,  
positioned on  
Grip side,  
Hole B:  
Hole for Driver bit  
on the end surface  
of Housing  
widest of the four  
approx.  
43.5mm  
Housing  
Grip  
Hole A  
Ribs A  
Upper  
drum cap  
1R273  
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P 13/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-5. Air Motor Section  
ASSEMBLING  
5) Before assembling Cylinder section to Housing, make sure if Air motor section is properly assembled to Housing  
by doing the test as described in Figs. 24, 25.  
Fig. 24  
Mount Inner separator and Outer separator,  
then insert 4 Tapping screw for preventing  
air leakage.  
Mount O rings on Front cushion assembly  
and Cushion guide. (Refer to Fig. 13.)  
Then mount them on Outer separator.  
Outer separator  
Inner separator  
Tapping screw 4  
Cushion guide  
Front cushion  
Fig. 25  
Attach a Flat washer of proper size to nozzle  
of air duster for preventing air leakage.  
Then insert the nozzle into Front cushion.  
Firmly pressing down Cushion guide and Flat washer  
with fingers, blow air into the machine.  
Rotor will rotate with humming if Air motor section is  
properly assembled to Housing.  
Flat washer  
air duster  
Flat washer  
of proper size  
Front cushion  
Cushion guide  
If Rotor does not rotate with noise of air moving  
through and out of the machine, insert Driver bit  
into Rotor and rotate Rotor by turning Driver bit.  
Then do this check again.  
6) Assemble Cylinder section to Housing. (Fig. 12)  
7) Assemble Top cap section to Housing as illustrated on left in Fig. 3.  
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P 14/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-6 Magazine Section  
DISASSEMBLING  
1) Separate Magazine section from Housing as described in Fig. 26.  
2) The Magazine section can be disassembled as described in Fig. 27.  
Fig. 26  
Magazine section can be separated from Housing by removing  
M5x28 Hex socket head bolt, Flat washer 5, M5 Hex nut and Hook.  
M5x28 Hex socket head bolt  
Flat washer 5  
Magazine section  
Hook  
M5 Hex nut  
Fig. 27  
Stop ring E5 is the stopper for Pin 5 (hinge pin).  
Therefore, by removing this Stop ring using slotted screwdriver  
from the rear of Magazine complete, Pin 5 can be removed from  
Magazine complete, and consequently, Magazine cap complete  
is separated from Magazine complete.  
Pin 5  
Stop ring E5  
Magazine complete  
Stop ring E5  
Magazine cap complete  
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P 15/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-7. Trigger Valve Section  
DISASSEMBLING  
1) In order to separate Trigger valve section from Housing, first, remove Spring pin 3-28 (3 pcs )and Trigger. (Fig. 28)  
2) Pull off Trigger valve section from Housing, then disassemble it as described in Fig. 29.  
Fig. 28  
Remove Trigger by removing Spring pin 3-28 with 1R268.  
Trigger can be disassembled by removing Spring pin 2.5-16  
with 1R267.  
Using 1R268, remove Spring pin 3-28 (2 pcs)  
securing Trigger valve section to Housing.  
Trigger  
Idler  
Spring pin  
Spring pin  
3-28  
Spring pin 3-28  
2.5-16  
Do not remove  
this Spring pin 3-28.  
Trigger  
Fig. 29  
Remove Trigger valve section from Housing  
by pinching Trigger valve stem with pliers,  
then pulling it in the direction of the arrow.  
Trigger valve section can be disassembled by levering off  
Trigger valve guide from Trigger valve case using a slotted  
screwdriver.  
Trigger valve stem  
Trigger valve section  
Trigger valve  
stem  
Trigger valve case  
Trigger valve guide  
Trigger valve  
Trigger valve section  
Trigger valve case  
Compression spring 3  
O Ring 8  
(213985-3)  
guide  
Pilot valve  
Trigger valve stem  
O Ring 3  
O Ring 2  
O Ring 20 O Ring 13.5  
O Ring 8  
(213984-5)  
O Ring 11  
O Ring 18  
with one side  
painted white  
for identification  
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P 16/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-7. Trigger Valve Section  
ASSEMBLING  
1) Mount O rings to Pilot valve as described in Fig. 30.  
2) Assemble Trigger valve section. (Refer to the bottom illustration in Fig. 29.)  
When assembling Trigger valve guide to Trigger valve case, push it toward Trigger valve case until it snaps in place.  
Fig. 30  
Two different kinds of O rings of size 8 are mounted  
on Pilot valve:  
A
O Ring 8 B  
(213985-3)  
O Ring 8  
(213984-5),  
with one side  
painted white  
A O Ring 8 (213984-5), of Nitrile rubber,  
with one side painted white for identification  
B O Ring 8 (213985-3), of Urethane rubber  
Do not confuse these two O rings because they  
are not interchangeable, and be sure to mount  
them in position as illustrated on right.  
Pilot valve  
O Ring 18  
3) Set Trigger valve section in Housing as illustrated in Fig. 31.  
Fig. 31  
Housing  
Trigger valve  
section  
4) Secure Trigger valve section to Housing with Spring pin 3-28 as described in Fig. 32  
Fig. 32  
Use 1R268 as a guide jig as illustrated below.  
Strike the Spring pin 3-28 gently and repeatedly  
until 1R268 is pushed out from Housing.  
1. Insert two 1R268’s through Housing  
in the groove of Trigger valve section.  
Spring pin  
3-28  
1R268  
2.Then insert Spring pin 3-28 from the opposite side,  
and fit its hole over the stepped end of 1R268.  
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P 17/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-8. Adjuster, Contact Arm Assembly  
DISASSEMBLING  
1) Separate Driver guide section from Housing, then separate Contact arm assembly from Driver guide section. (Fig. 33)  
2) Disassemble Contact arm assembly as described in Fig. 34.  
Fig. 33  
Remove Contact arm cover by  
unscrewing M5x16 Hex socket  
head bolt.  
Separate Driver guide section from Housing by unscrewing two  
M5x12 Hex socket head bolts.  
Then separate Contact arm assembly from Driver guide section.  
M5x16 Hex socket  
head bolt  
Contact arm assembly  
Contact arm  
cover  
Driver guide  
section  
M5x12 Hex socket  
Driver guide  
head bolt  
section  
Fig. 34  
Put Contact arm assembly on 1R217 or the like, then remove  
Spring pin 2-14 (used as a stopper for Adjust shaft) with 1R266.  
Adjust shaft can now be removed by turning Adjuster complete.  
Note: Be careful not to lose Steel ball 2.3 and  
Contact arm can be removed from Stopper  
by turning Adjust piece 90 degrees then by  
pulling up through the window of Stopper.  
Compression spring 2.  
Adjust piece  
Adjust shaft  
Stopper  
1R266  
Contact arm  
window  
Steel ball 2.3  
Compression spring 2  
1R217  
Adjuster complete  
Spring pin  
2-14  
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P 18/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-8. Adjuster, Contact Arm Assembly  
DISASSEMBLING  
3) The parts of Chuck portion can be disassembled from Contact arm as illustrated in Fig. 35.  
Fig. 35  
Washer  
Torsion spring 4  
Contact arm  
Pin 3.5  
Torsion spring 4  
Chuck  
(310222-7)  
Contact top  
Chuck  
(310221-9)  
Nose adaptor  
ASSEMBLING  
1) Assemble the parts of Chuck portion to Contact arm as described in Fig. 36.  
2) Then do the reverse of the disassembling steps. (See Figs. 34, 33.)  
Fig. 36  
Assemble two Chucks and Contact top to Contact arm with the open sides of the four parts on the same side.  
If assembled wrong way, screws cannot be fed.  
open side  
Contact arm  
closed side  
open side  
open side  
Chuck  
(310222-7)  
Chuck  
(310221-9)  
closed side  
closed side  
Contact top  
Insert Pin 3.5 through Contact top, Contact arm,Chucks and Torsion spring 4,  
then fix them with Washer as illustrated below.  
Torsion spring 4  
Washer  
Pin 3.5  
Torsion spring 4  
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P 19/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3] -9. Driver Guide, Feed Piston  
DISASSEMBLING  
1) Disassemble Driver guide section and Feed piston as described in Figs. 37, 38, 39.  
Fig. 37  
Remove Contact arm cover from Housing by unscrewing  
M5x16 Hex socket head bolt.  
Because two Compression springs are mounted in  
Driver guide complete, remove Retaining ring R-24  
while pressing Cup washer firmly.  
Slowly remove Cup washer so that two  
Compression springs do not pop out.  
Then remove Compression spring 10,  
Compression spring 9 and Rubber ring 14.  
Compression  
spring 10  
M5x16 Hex socket  
head bolt  
Cup washer  
Retaining ring  
R-24  
Compression  
spring 9  
Cup washer  
Contact arm cover  
Driver guide  
Rubber ring 14  
complete  
Fig. 38  
Remove Driver guide complete and  
Contact arm assembly by unscrewing  
two M5x12 Hex socket head bolts.  
Remove Urethane ring 4  
and Pin 4.5 from Driver  
guide complete.  
Remove Feed piston from Feeding claw.  
Note:  
Be careful not to lose Compression  
spring 3 mounted between Feed piston  
and Feeding claw.  
Contact arm  
assembly  
Driver guide complete,  
viewed from  
Contact arm cover side  
Feed piston  
Feeding claw  
Remove O ring 19  
from Feed piston.  
Driver guide  
gasket  
Compression  
spring 3  
Urethane  
ring 4  
Pin 4.5  
Driver guide  
complete  
M5x12 Hex socket  
head bolt  
Fig. 39  
Remove Urethane ring 3  
from Pin 4 and Lock pin.  
Remove Pin 4. Then, pressing down Lock pin to unhook  
it from Driver guide complete, remove it together with  
Compression spring 5.  
Remove Door from  
Driver guide complete.  
Urethane ring 3  
Lock pin  
Compression spring 5  
Door  
Lock pin  
Urethane ring 3  
Pin 4  
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P 20/20  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3]-9. Driver Guide, Feed Piston  
ASSEMBLING  
Do the reverse of the disassembling steps. (Refer to Figs. 39, 38, 37.)  
[3]-10. Inlet Cap, Plug  
DISASSEMBLING  
Disassemble Plug and Inlet cap as described in Figs. 40, 41, 42.  
Fig. 40  
Clamp the hex portion of Plug in vise. Then, by turning the machine clockwise,  
Plug section can be removed from the machine.  
Plug section can be disassembled  
as illustrated below.  
Comical compression  
spring 5-10  
Plug  
Sheet packing  
Cap 9  
Vise  
Plug  
Fig. 41  
By unscrewing four M5x30Hex socket head bolts,  
four parts can be removed from Housing as illustrated below.  
Remove O ring 25  
from Inlet cap.  
Inlet cap with Adjust cap  
Inlet cap with  
Adjust cap  
[Caution]  
Do not turn Adjust cap  
because it is  
Filter  
Inlet cap spacer  
factory adjusted.  
O Ring 25  
Inlet cap gasket  
Inlet cap  
M5x30 Hex socket  
head Bolt (4 pcs)  
Adjust cap  
Housing  
Fig. 42  
Pipe 13 can be removed from Housing by holding the inside of the Pipe with 1R003  
then by pulling off Pipe 13 together with Inlet filter.  
If it is difficult to remove Pipe 13 using 1R003, remove by striking the end surface  
of Grip with mallet.  
[Caution]  
Do not clamp the outside of  
Pipe 13, or its outer surface  
will be scratched, causing  
air leakage.  
O Ring 14 [thick]  
(213162-7)  
O Ring 14 [thick]  
(213154-6)  
Pipe 13  
1R003  
Pipe 13  
O Ring 14 [thin] Inlet filter  
(213162-7)  
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