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[4] DISASSEMBLY/ASSEMBLY
[4]-1. Head valve section

DISASSEMBLING

Fig. 3

Fig. 4

M5x35 Hex socket 
head bolt (4pcs.)

M5 Hex socket button head bolt 

Disassemble Head valve section as illustrated in

 Figs. 3 and 4

.

Top cap

Top cap

Top cap

Exhaust cover cap

Disassemble Head valve section from Housing set
by removing M5 Hex socket button head bolt and 
M5x35 Hex socket head bolt (4pcs.).
Head valve and Rear cushion remain in Top cap in
this step.

Head valve

While holding Head valve by hand,
blow the air into Top cap with air duster.
Head valve and Rear cushion can be lifted
from Top cap.

air duster

Exhaust cover

Filter

Top cap gasket

Housing set

Rear housing
guard (2pcs.)

Rear cushion

Flat washer 26

Rear cushion can be completely 
removed by pushing with 1R308 
through the hole of Top cap. 

Head valve section

1R308 

Remove Head valve by 
turning by hand.
If removing is difficult, 
lever up Head valve with
slotted screwdriver.

Head valve

slotted screwdriver

ASSEMBLING

Compression 
spring 4 (8pcs.)

Head valve

(1) Assemble Head valve section as illustrated in 

Fig. 5

.

(2) Mount the Head valve section to Housing set.   Refer to 

Fig. 3

1R247

arbor
press

Assemble Head valve to Top cap carefully
so that Compression spring 4 (8pcs.) does
not fall. 

Mount Flat washer 26 to 
Rear cushion.
And put Rear cushion on 
the center of Top cap.

Finally set Rear cushion in
place in Top cap with 1R247
and arbor press.

Flat washer 26

Rear cushion

Fig. 5

P 4/ 16

R

epair

Summary of Contents for AN450H

Page 1: ...uipment for the tool shown above may vary by country Hook 1 Safety goggles 1 Oil supply containing 30ml of turbine oil 1 Hex wrench 4 1 Plastic carrying case 1 Air leak repair set Coil nails Air hose...

Page 2: ...for Apply a little amount of Isoflex NB52 to O rings and Rubber ring illustrated below to protect parts and product from unusual abrasion Fig 1 Item No Description Trigger valve section Q ty 9 12 16 2...

Page 3: ...zine cap complete to Door fastening Magazine to Driver guide complete fastening Exhaust cover cap to Top cap 1 installing the left handed thread to Housing set 1 2 1 installing the left handed thread...

Page 4: ...p cap gasket Housing set Rear housing guard 2pcs Rear cushion Flat washer 26 Rear cushion can be completely removed by pushing with 1R308 through the hole of Top cap Head valve section 1R308 Remove He...

Page 5: ...Valve seat from Cylinder Remove Valve seat from Cylinder stay Cylinder Cylinder Housing set Driver complete 3 O ring 17 O ring 28 and O ring 40 can be removed as illustrated in Fig 8 Fig 9 Cylinder D...

Page 6: ...pcs Refer to Figs 10 to 12 Remove Magazine and Single guide from the machine by removing M5x25 Hex socket head bolt 2pcs Remove Magazine guard by removing M4x8 Pan head screw Press Change plate until...

Page 7: ...agazine Insert Rubber plate 6 20 into Tension spring 5 Then assemble Top cap to Tension spring 5 Put Holder cap to Change plate while passing Tension spring 5 through the center hole of Change plate P...

Page 8: ...agazine cap complete Refer to Fig 14 Refer to Fig 15 Take the disassembling step in reverse Compression spring 6 Lock pin Lock lever Magazine cap complete Remove the other components as illustrated be...

Page 9: ...laced in this step as the right illustration in Fig 16 Viewed from Magazine side Trigger Contact arm Urethane ring 3 Remove Urethane ring 3 Contact arm can be removed together with Contact top Contact...

Page 10: ...be removed from Housing set Pilot valve Trigger valve guide Trigger valve case Separate Trigger valve case from Trigger valve guide Trigger valve guide Trigger valve stem Pilot valve Trigger valve ste...

Page 11: ...le Trigger base section Fig 20 3 Pay attention to the assemble position of Spring pins 3 20 and 3 32 Refer to the left illustration in Fig 17 4 Use 1R268 as a guide jig for easy and exact assembly of...

Page 12: ...cs of Pin 3 Trigger base section are dissembled as illustrated right Torsion spring 5 Torsion spring 4 Torsion spring 4 Torsion spring 6 Pin 3 as an axis for Trigger Pin 3 as an axis for Stopper plate...

Page 13: ...Put the one of tail of Torsion spring 5 on the boss of Stopper plate Lever for Single firing Stopper plate Face the wide hook side to Lever for single firing And assemble the Torsion spring 6 as illu...

Page 14: ...urning it by 90 degrees Remove Adjuster piece Slide plate can be removed from Upper yoke Adjuster piece Adjuster piece Upper yoke Fig 28 Remove Adjuster shaft by turning carefully so as not to lose St...

Page 15: ...ng the protruded end of Pin 4 with pliers pull it off toward the nail firing direction Disassemble Door and Magazine cap complete from Driver guide complete Pin 4 Urethane ring 3 Door Magazine cap com...

Page 16: ...nt H22PM clamp this hexagonal portion in vise then turn the machine clockwise as the right illustration hexagonal portion of One touch joint H22PM Inlet cap and One touch joint can be disassembled as...

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