DeWalt D51420 User Manual download pdf (Page 1)

D510001

18 Gauge O-ring Repair Kit Instructions

FOR USE WITH D51236 18 GA. 1-1/4" BRAD NAILER

FOR USE WITH D51420 18 GA. 1" NARROW CROWN

STAPLER

If you should have difficulty understanding the following

instructions contact a D

EWALT service center or an authorized

EWALT service person.

Important Safety Instructions

• Read and understand tool instruction manual before attempting

repairs.

• Use only genuine D

EWALT replacement parts.

• Always wear ANSI compliant eye protection.

• Disconnect air from tool and remove all nails before servicing.

• Always point tool in safe direction when reconnecting air

supply.

CAUTION:

• Do not allow dirt, dust or other foreign materials to enter the

tool.

• Be careful not to scratch or damage the o-rings or any internal

surfaces.

O-RING DESC. # IN KIT PART # REF. LETTER

O-Ring 31.5 x 2 2 642910-00 F

O-Ring 14.7 x 1.9 1 642909-00 E

O-Ring 21.8 x 3.1 1 642912-00 L

O-Ring 49.5 x 2 1 642911-00 Q

Cap Gasket 1 642918-00 O

Grease Tube 1 606118-00

O-ring Reference Guide

PART #

642909-00

PART #

642912-00

PART # 642911-00

PART #

642910-00

1. Disconnect air from tool before

servicing or repairing.

2. Remove all nails from tool.

3. Remove four screws from top

cap (A) with 3 mm Allen wrench

provided in kit box. The head

valve (B) and head valve spring

not to misplace them.

DEWALT Industrial Tool Co., 701 Joppa Road, Baltimore, MD 21286

The following are trademarks for one or more D

EWALT power tools: the yellow and black color scheme; the “D” shaped air intake grill; the array of pyramids

on the handgrip; the kit box configuration; and the array of lozenge-shaped humps on the surface of the tool.

4. Pull head valve (B) and head valve spring (C) out of top cap

through center of head valve opening.

5. Replace o-rings (E, F) on head

valve.

6. Apply grease provided to o-rings

in head valve prior to assembly.

7. Remove piston/driver sub-

assembly (H), cylinder (I),

bumper (J), bumper plate (N)

and bulkhead/cylinder hold-

down (K) from tool.

8. Remove bulkhead/cylinder hold-down (K) from cylinder.

9. Remove piston/driver subassembly (H) from cylinder.

10. Replace piston o-ring (L) on driver blade/piston assembly.

11. Replace internal o-ring (F) on cylinder and external o-ring (Q)

on bulkhead/cylinder hold-down (K).

12. Apply grease provided to all o-rings prior to assembly.

13. Ensure the inside of the tool is free from dirt and debris.

14. Place piston/driver subassembly (H) back into cylinder (I).

15. Place bumper (J) onto bottom of cylinder (I).

16. Place bumper plate (N) through the piston/driver subassembly

(H) and onto the bottom of the bumper (J).

17. D51236 ONLY

Making sure the piston/driver subassembly’s flat (smooth)

side is facing toward the FRONT of the tool, slide the cylinder/

bulkhead/piston/driver/bumper/bumper plate into the tool so

the piston/driver subassembly slides down the driver blade

channel in the nosepiece.

D51420 ONLY

Making sure the piston/driver subassembly’s flat (smooth)

side is facing toward the BACK of the tool, slide the cylinder/

bulkhead/piston/driver/bumper/bumper plate into the tool so

the piston/driver subassembly slides down the driver blade

channel in the nosepiece.

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Summary of Contents

Page 1 - O-ring Reference Guide

D510001 18 Gauge O-ring Repair Kit InstructionsFOR USE WITH D51236 18 GA. 1-1/4" BRAD NAILERFOR USE WITH D51420 18 GA. 1" NARROW CROWN STAPL

Page 2 - EWALT ou le

18. Be sure to replace top gasket (O) and properly place between the top cap and frame before fastening the top cap.19. Make sure to reinstall headB

Page 3 - EWALT originales

13. S’assurer que la surface interne de l’outil est exempte de saletés et de débris. 14. Remettre le sous-ensemble piston/extrémité motrice (H) dans

Page 4

5. Vuelva a colocar las juntasEF tóricas (E, F) en la válvula de suministro. 6. Antes de ensamblar, aplique la grasa suministrada a las juntas tórica

DeWalt D51420 User Manual Page 1

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