8- ENG
WARNING:
When working on air tools, note the warnings in this manual and use
extra care evaluating problem tools.
CAUTION:
Pusher spring (constant force spring). Caution must be used when
working with the spring assembly. The spring is wrapped around, but not attached
to, a roller. If the spring is extended beyond its length, the end will come off the roller
and the spring will roll up with a snap, with a chance of pinching your hand. Also the
edges of the spring are very thin and could cut. Care must also be taken to insure no
permanent kinks are put in the spring as this will reduce the springs force.
REPLACEMENT PARTS
Use only D
e
WALT replacement parts.
ASSEMBLY PROCEDURE FOR SEALS
When repairing a tool, make sure the internal parts are clean and lubricated. Use
Parker “O”-LUBE or equivalent on all “O”-rings. Coat each “O”-ring with “O”-LUBE
before assembling. Use a small amount of oil on all moving surfaces and pivots. After
reassembly add a few drops of D
e
WALT Air Tool Lubricant through the air line fitting
before testing.
AIR SUPPLY-PRESSURE AND VOLUME
Air volume is as important as air pressure. The air volume supplied to the tool may
be inadequate because of undersize fittings and hoses, or from the effects of dirt
and water in the system. Restricted air flow will prevent the tool from receiving an
adequate volume of air, even though the pressure reading is high. The results will be
slow operation, misfeeds or reduced driving power. Before evaluating tool problems for
these symptoms, trace the air supply from the tool to the supply source for restrictive
connectors, swivel fittings, low points containing water and anything else that would
prevent full volume flow of air to the tool.
Maintaining The DWMIII Series Tools
TO REPLACE PISTON
A. Insert the flats on the lower end of the driver piston stem carefully into the end of
piston and plunger wrench, BC1009.
B. Using another special wrench, BC1009, or another wrench of the proper size,
unscrew the plunger from the upper end of the stem. After this is done, it will be
possible to lift the poppet off the stem.
C. Place the special wrench, BC1009, down over the piston stem onto the driver
piston, locking the piston ears in the slots in the wrench. Unscrew the piston from
the stem.
TO REPLACE DRIVER
A. It is not necessary to disassemble the piston-poppet-driver assembly to replace
the driver. Pull the poppet up on the driver piston stem as far as it will go.
B. Insert special wrench, BC1009, over the driver piston, locking the piston ears in
the slots in the wrench. Unscrew the piston from threaded portion of the stem.
C. To remove the driver blade from the piston stem, push the driver blade pin out of
the stem. This will release the blade.
D. Insert new driver blade into the slot in the end of the driver piston stem and
assemble the driver blade pin. Test the side play in the driver blade by grasping the
driver piston stem in one hand and the blade in the other and moving the blade
sideways in alignment with the slot in the stem. There should be a small amount
of side play in the blade. This is necessary to take care of any slight misalignment
between the blade and guide in the nose. If there is no side play, the blade should
