DeWalt D25900K Service Manual

Page 3 of 63
SECTION ONE.
General Information.
q ONLY THE CORRECT GREASE MUST BE USED
q When repairing this product it is very important to keep the working area clean and free
from any dust or debris.
If any contamination is allowed within the Tool holder, Anti-vibration unit or Gear Box this
will cause premature failure of the Product.
q If significant wear has occurred within in the Tool Holder components then it is
recommended to replace the complete unit (111).
q If ANY of the O Rings are disturbed when dismantling, they must be replaced.
q If only the Motor/Switch needs attention, it is not necessary to remove the Anti-Vibration &
Tool Holder units, although it can make the operation difficult if left attached, because of
the size and weight of the product.
If they are removed then the following should be noted
q Only undo the 4 Screws (65) from the Anti-Vibration Unit and remove the complete front
assembly including the Tool Holder Unit from the Motor Housing.
q The Piston, Crank Case, Cylinder & Anti-Vibration Unit will be exposed and should be
kept covered to prevent any ingress of dust or debris.
q The O Ring’s (49) Piston and (79) Housing must be replaced on re-assembly.
Serial Number / Date Code.
A serial number and the Date code will be printed on the Main Metal Housing on the right
hand side next to the Anti-Vibration Unit. .
The Serial Number must be quoted on all repair documentation.
After repair, mark the housing next to the serial number with the letter ‘R’.

DeWalt D25900K Specifications

General

Input power	1500 W
Power source	AC
AC input voltage	230 V
AC input frequency	50 Hz
Impact rate	2040 bpm
Impact energy (max)	25 J
Chuck type	SDS Max

Weight and Dimensions

Weight	9800 g