Lubrication; Maintenance And Inspection - Hitachi DH 25DL Handling Instructions Manual

English
(2) Mount the drill bit (taper shank) to the taper shank
adapter. (Fig. 15 on page 49)
(3) Turn the switch ON, and drill a hole to prescribed
depth.
(4) To remove the drill bit (taper shank), insert the cotter
into the slot of the taper shank adapter and strike the
head of the cotter with a hammer supporting on the
rest. (Fig. 16)
8. Switching between the "SAVE" and the "POWER"
modes
The hammering force of the hammer can be
increased or decreased to conform with intended
usage, by operating the shift knob as per Fig. 17.
Adjust the force to match the usage intended.
(1) "SAVE" mode ... decreased hammering force
This can prevent thin drill bits which are less than 5
mm in diameter, from being bent or broken.
(2) "POWER" mode ... increased hammering force
This can be used to speedily and effi ciently drill holes
○
when the drill bits which are being used are greater
than 5 mm in diameter.
This can be used to drill holes into wood or metal.
○
CAUTION
Do not drill holes in wood with the "SAVE" mode. There is a likelihood that the
motor will burn out because it can easily lock up due to the low power.

LUBRICATION

Low viscosity grease is applied to this rotary hammer so that it can be used for a long period
without replacing the grease. Please contact the nearest service center for grease replacement
when any grease is leaking form loosened screw.
Further use of the rotary hammer despite the grease shortage causes damage to reduce the
service life.
CAUTION
A specifi c grease (FG-6A) is used with this machine, therefore, the normal
performance of the machine may be badly aff ected by use of diff erent grease.
Please be sure to let one of our service centers to undertake replacement of the
grease.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
Since use of as dull tool will degrade effi ciency and cause possible motor malfunction,
sharpen or replace the tool as soon as abrasion is noted.
50
Taper shank
Cotter
adapter
Rest
Fig. 16
"SAVE"
mode
"POWER"
mode
Shift knob
Fig. 17