Tool Operation Check; Maintaining The Pneumatic Tool - DeWalt DWEHF1838K Instruction Manual

Remove all fasteners from tool before performing tool operation check.
If the tool is dropped or you suspect tool damage perform tool operation check.
SEQUENTIAL TRIP OPERATION:
A. Press the contact trip against the work surface, without touching the trigger.
THE TOOL MUST NOT CYCLE.
B. Hold the tool off the work surface and pull the trigger.
THE TOOL MUST NOT CYCLE.
Release the trigger. The trigger must return to the trigger stop on the frame.
C. Pull the trigger and press the contact trip against the work surface.
THE TOOL MUST NOT CYCLE.
D. With finger off the trigger, press the contact trip against the work surface. Pull the trigger.
THE TOOL MUST CYCLE.
When working on air tools, note the warnings in this manual and use extra care evaluating
problem tools.
If the tool has been dropped or you suspect tool damage perform tool operation check as
defined in the tool operation check section.
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 genuine D WALT replacement parts. Do not use modified parts.
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ASSEMBLY PROCEDURE FOR SEALS
When repairing a tool, make sure the internal parts are clean and lubricated. Use Parker "O"-LUBE, Magnalube,
or equivalent on all "O"-rings. Coat each "O"-ring with lubricant before assembling.
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, low points containing water and anything else
that would prevent full volume flow of air to the tool.

TOOL OPERATION CHECK

MAINTAINING THE PNEUMATIC TOOL

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