5. Replace internal (E) and external (F) O-rings on head valve.
6. Apply grease provided to O-rings
in head valve prior to assembly.
7. Remove cylinder hold-down (G)
from tool.
8. Remove piston/driver subassembly
(H), cylinder (I), bumper (J), bumper
plate (N) and bulkhead (K) from tool.
9. Remove bulkhead from cylinder.
10. Remove piston/driver subassembly
(H) from cylinder.
11. Replace piston O-ring (L) on driver
blade/piston assembly.
12. Replace check valve O-ring
(M) on cylinder.
13. Replace internal (K2) and external
(K1) O-rings on bulkhead (K).
14. Apply grease to all O-rings prior to assembly.
15. Ensure the inside of the tool is free from dirt and
debris.
16. Place piston/driver subassembly (H) back into
cylinder (I).
17. Place bumper (J) onto bottom of cylinder (I).
18. Place bumper plate (N) through the
piston/driver subassembly. (H) and onto the
bottom of the bumper (J).
19. Replace cylinder seal (Q) with new one pro-
vided, and snap onto cylinder.
20. Replace cylinder hold-down (G) onto top of
bulkhead (K).
21. Assemble top bumper (D) into top cap (A). Be sure it snaps into
place.
H
G
K
I
J
M
E
F
(RED DOT)
B
C
D
B
D514301 O-ring Repair Kit Instructions
FOR USE WITH THE D51430 AND D51431 MEDIUM CROWN
STAPLERS
If you should have difficulty understanding the following instruc-
tions contact a D
E
WALT service center or an authorized D
E
WALT
service person.
Important Safety Instructions
•
Read and understand tool instruction manual before attempting
repairs.
•
Use only genuine D
E
WALT 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.
CAUTIONS:
•
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.
TO REPLACE O-RING
1. Disconnect air from tool before servicing
or repairing.
2. Remove all nails from the magazine and
nosepiece before servicing or repairing.
3. Remove 4 screws from top cap (A) with
4 mm Allen wrench provided in kit box.
4. Pull head valve (B), head valve spring
(C), and top bumper (D) out of top cap
through center of head valve opening.
A
O-RING DESC.
# IN KIT
PART #
REF. LETTER
O-Ring 42.9 x 2.53
1
609019-00
F (Red Dot)
O-Ring 35.8 x 2.5
1
398163-00
E
O-Ring 29.7 x 3.5
1
622865-00
L
O-Ring 43.5 x 2
1
398165-00
M
O-Ring 64.5 x 2
1
398166-00
K(1)
O-Ring 45.5 x 2
1
398167-00
K(2)
Cap Gasket
1
395376-00
O
Seal, Cylinder
1
395380-00
Q
Grease Tube
1
606112-00
F
PART# 609019-00
(RED DOT)
(POINT ROUGE)
(PUNTO ROJO)
K1
PART# 398166-00
L
PART# 622865-00
M
PART#
398165-00
E
PART# 398163-00
K2
PART# 398167-00
D
E
WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286
(MAR04) Form No. 622879-00 D514301 Copyright © 2004
The following are trademarks for one or more D
E
WALT 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.
N
J
H
I
Q
L
