D518015
O-ring Replacement Instructions
DEWALT FRAMING NAILER MODELS D51825 AND D51850
If you should have difficulty understanding the following
instruc tions contact a D
EWALT service center or an authorized
D
EWALT service person, or call 1-800-4-DEWALT.
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.
TABLE 1
O-RING DESC. # IN KIT PART #
Inner Exhaust 1 641142-00
Inner Cylinder 1 641138-00
(in polybag)
Outer Exhaust 1 641140-00
Outer Cylinder 1 641137-00
Outer Bulkhead 2 641136-00
Lower Cylinder 1 641135-00
OTHER INCLUDED PARTS
Retainer Band 1 641168-00
Cylinder Seal 1 641170-00
Check Seal O-ring 1 N008933 (black o-ring)
Grease Tube 2 606112-00
Piston O-ring 1 641139-00
1. Disconnect air supply and remove nails from tool.
2. Remove the 4 top cap screws (A) using a 5 mm hex wrench.
Remove the top cap (D).
A
C
B
D
3. Remove wear guards (B), wear pads (C) and gasket (E).
C
B
E
A
D
4. Pull out engine assembly and piston/driver blade assembly. If
necessary, pry the cylinder out of housing using the handle of a
hammer or other tool.
5. Place the engine assembly upside down on work surface so
that the spring is toward the top. Use one hand to compress
the collar (E) and spring (F) so that the lower cylinder o-ring
(G) is exposed.
E
G
F
J
I
E
H
6. With the free hand, remove the lower cylinder o-ring and
gently release the collar and spring.
a. Remove the collar (E).
E
I
F
H
K
J
b. Remove the spring (F) by turning it slightly as it is pulled
off.
c. Remove the black retainer band (H) from the white spring
retainer (I).
I
7. Remove the spring retainer (I) by spreading it enough to clear
the body of the engine and pushing it up.
8. Remove the bulkhead (J).
9. All the o-rings are identified in Figure 1.
10. Remove all o-rings and the cylinder seal (K) as identified in the
Parts Drawing at the end of this instruction sheet.
IMPORTANT: Replace all o-rings, coating each one with
a layer of supplied grease to insure proper seating when
reinstalled. No grease is needed on the check seal.
11. Reassemble the engine in reverse order.
WARNING: The o-ring in the polybag (part # 641138-00)
must only be used in the location indicated on the Parts
Drawing. The use of any other o-ring in this position could
2
result in excessive wear over the life of the tool and potential
inadvertent firing.
12. Before installing engine into the housing, make sure bumper
(L) is properly seated in the nosepiece.
L
13. Insert engine assembly into frame and push down as far as
possible.
14. Replace piston o-ring (M) on driver blade/piston as sem bly (N).
Insert driver blade/piston assembly into cylinder. Align driver
blade by turning clockwise and pushing in.
N
M
15. Liberally apply supplied grease to the inner and outer exhaust
o-rings before assembling the top cap to the engine frame.
PART # / PIÈCE N° / PIEZA N°
N008933
Black o-ring /
Joint torique noir /
Junta tórica negro
PART #
PIÈCE N°
PIEZA N°
641140-00
PART #
PIÈCE N°
PIEZA N°
641136-00
PART #
PIÈCE N°
PIEZA N°
641135-00
PART #
PIÈCE N°
PIEZA N°
642139-00
PART #
PIÈCE N°
PIEZA N°
641137-00
FIG. 1
PART # / PIÈCE N° / PIEZA N°
641138-00
16. Replace gasket. Be sure to orient gasket in the proper
direction.
17. With a gentle turning motion, assemble top cap onto engine
and frame. The cap should slide easily. If not, remove cap and
reassemble.
18. Push downward to fully seat cap of frame.
19. Replace and tighten top cap screws, wear guards and wear
pads.
20. Tighten screws snugly to prevent leaks.
21. Ensure trigger and contact trip are working smoothly.
22. Set pressure on compressor or air line at 80 psi.
23. Pointing tool in safe direction, connect tool to air supply. Tool
must not leak air.
24. Check for proper operation of tool. If tool continues to leak
air or if problems persist, take nailer to a D
EWALT service
center.
25. If warning labels are missing or damaged, request free
replace ments from a D
EWALT service center.
PART # / PIÈCE N° / PIEZA N°
641142-00
Page is loading ...
Page is loading ...
Page is loading ...
BULKHEAD
CLOISON
TABIQUE DIVISORIO
PART # / PIÈCE N° / PIEZA N°
641111-00
WHITE SPRING RETAINER
PIÈCE DE RETENUE DU
RESSORT BLANCHE
DISPOSITIVO DE
RETENCIÓN DEL RESORTE
DE COLOR BLANCO
PART # / PIÈCE N° / PIEZA
N° 641169-00
SPRING
RESSORT
RESORTE
PART # / PIÈCE N° / PIEZA
N° 641115-00
OUTER CYLINDER O-RING
JOINT TORIQUE DU PISTON
EXTERNE
JUNTA TÓRICA DEL
CILINDRO EXTERNO
PART # / PIÈCE N° / PIEZA N°
641137-00
BLACK RETAINER BAND
BANDE DE RETENUE NOIRE
BANDA DE RETENCIÓN
DE COLOR NEGRO
PART # / PIÈCE N° / PIEZA N°
641168-00
INNER CYLINDER O-RING
(IN POLYBAG)
JOINT TORIQUE INTERNE DU
PISTON (DANS LE SAC DE
PLASTIQUE)
JUNTA TÓRICA DEL CILINDRO
INTERNO (EN BOLSA DE
POLIETILENO)
PART # / PIÈCE N° / PIEZA N°
641138-00
OUTER EXHAUST O-RING JOINT
TORIQUE DE L’ÉCHAPPEMENT
EXTERNE
JUNTA TÓRICA DEL ESCAPE
EXTERNO
PART # / PIÈCE N° / PIEZA N°
641140-00
COLLAR / BAGUE / ANILLO
PART # / PIÈCE N° / PIEZA N°
641171-00
LOWER CYLINDER O-RING (INSIDE)
JOINT TORIQUE DU BAS DU PISTON (INTERNE)
JUNTA TÓRICA DEL CILINDRO INFERIOR (INTERIOR)
PART # / PIÈCE N° / PIEZA N° 641135-00
OUTER BULKHEAD O-RINGS
JOINTS TORIQUES DE LA
CLOISON EXTERNE
JUNTAS TÓRICAS DEL
TABIQUE DIVISORIO
EXTERNO
PART # / PIÈCE N° / PIEZA N°
641136-00
INNER EXHAUST O-RING (INSIDE)
JOINT TORIQUE INTERNE DE L’ÉCHAPPEMENT (INTERNE)
JUNTA TÓRICA DEL ESCAPE INTERNO (INTERIOR)
PART # / PIÈCE N° / PIEZA N° 641142-00
CHECK SEAL O-RING
(Black o-ring)
JOINT TORIQUE DE
SCELLEMENT
(Joint torique noir)
JUNTA TÓRICA DEL
SELLO DE RETENCIÓN
(Junta tórica negro)
PART # / PIÈCE N° / PIEZA N°
N008933
CYLINDER SEAL
JOINT DU PISTON
SELLO DEL CILINDRO
PART # / PIÈCE N° / PIEZA
N° 641170-00
Parts Drawing - Schéma des pièces - Diagrama de piezas
DEWALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286
Copyright © 2007, 2008 DEWALT (MAY08) Part # N001280 D518015
The following are trademarks for one or more DEWALT 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.
-
1
-
2
-
3
-
4
-
5
-
6
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
in other languages
- français: DeWalt D518015 Manuel utilisateur
- español: DeWalt D518015 Manual de usuario