Drilling And Driving-In Operations For Anchors; How To Replace Grease; Maintenance And Inspection - Hitachi Koki DH 40SR Instrucciones De Manejo

English
4. Warming up (Fig. 7)
The grease lubrication system in this unit may require
warming up in cold regions.
Position the end of the bit so makes contact with the
concrete, turn on the switch and perform the warming
up operation. Make sure that a hitting sound is
produced and then use the unit.
CAUTION
When the warming up operation is performed, hold
the side handle and the main body securely with both
hands to maintain a secure grip and be careful not to
twist your body by the jammed drill bit.
DRILLING AND DRIVING-IN OPERATIONS FOR
ANCHORS
Use the optional accessories for anchors, such as anchor
adapter and taper shank adapter.
1. When a rotation hammering anchor adapter is used.
(1) Install the self-drilling anchor in the anchor adapter
(Fig. 8).
(2) Turn ON the switch and drill a base hole with the self-
drilling anchor. (Fig. 9)
At the start of the hole-drilling slightly tilt the rotary
hammer to determine the hole position.
(3) After cleaning out dust with a syringe, attach the plug
to the anchor tip and drive in the anchor with a manual
hammer.
(4) After driving in the anchor, use the drift key to separate
the anchor. (Fig. 10)
(5) By employing a manual hammer or pliers, snap off
the tapered portion of the anchor. (Fig. 11)
CAUTION
Since the snapped-off tapered portion will fly about,
pay attention to the snapping direction.
2. When a taper shank adapter is used. (Fig. 12)
(1) Install drill bit with taper shank in the taper shank adapter.
(2) Turn the power on and drill a base hole to the depth
sounded by indicating groove on the drill bit.
(3) After cleaning out dust with a syringe, attach the plug
to the anchor tip and drive in the anchor with a manual
hammer.
(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 manual hammer supporting
on a rest. (Fig. 13)
HOW TO HANDLE A CORE BIT
When a core bit is used, large diameter holes and blind
holes can be drilled. In this case, use optional accessories
for core bits (such as a center pin and core bit shank) for
more efficient operation.
1. Mounting
CAUTION
Prior to mounting a core bit, always disconnect the
plug from the power supply receptacle.
(1) Mount the core bit on the core bit shank. (Fig. 14)
Before that, feed oil to the screw portion of core bit
shank for easy dismounting.
(2) Mount the core bit shank on the main body in the
same manner as in mounting the drill bit and the bull
point. (Fig. 15)
(3) Insert the center pin into the guide plate until it reaches
the extremity.
9
(4) Fit in the guide plate by aligning its concaved portion
with the core bit tip. When the position of the concave
is shifted by turning the guide plate right or left, the
guide plate never slips off even when the drill is used
in a downward direction. (Fig. 16)
2. Drilling holes
(1) Insert the plug into a receptacle.
(2) A spring is built in the center pin. By straightly and
gently pressing it to the wall or floor surface, the entire
surface of the core bit tip attains contact to start the
hole drilling job. (Fig. 17)
(3) When the hole depth reaches approximately 5 mm,
the hole position can be determined. Then remove
the center pin and guide plate from the core bit and
continue the hole drilling job.
CAUTION
When removing the center pin and guide plate, always
disconnect the plug from the receptacle.
3. How to dismount the core bit
Remove the core bit shank from the rotary hammer,
hold the core bit with one hand, and strongly strike
the head of the hexagonal portion of the core bit shank
with a manual hammer two or three times, whereby
the round head screw is loosened and the rotary
hammer is ready for disassembly. (Fig. 18)

HOW TO REPLACE GREASE

This machine is of full air-tight construction to protect
against dust and to prevent lubricant leakage. Therefore,
the machine can be used without lubrication for long
periods. Replace the grease as described below.
1. Grease replacement period
After purchase, replace grease after every 6 months
of usage. Ask for grease replacement at the nearest
Hitachi authorized Service center. Proceed for
replacement of grease.
2. Grease replenishment
CAUTION
Before replenishing the grease, turn the power off and
pull out the power plug.
(1) Remove the crank cover and wipe off the grease
inside. (Fig. 19)
(2) Supply 30g of Hitachi Electric Hammer Grease A
(Standard accessory, contained in tube) to the crank
case.
(3) After replenishing the grease, install the crank cover
securely.
NOTE
The Hitachi Electric Hammer Grease A is of the low
viscosity type. If necessary purchase from an Hitachi
authorized Service center.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
Since use of a dull tool will degrade efficiency and
cause possible motor malfunction, sharpen or replace
the tool as soon as abrasion is noted.
2. Inspecting the mounting screws:
Regularly inspect all mounting screws and ensure that
they are properly tightened. Should any of the screws
be loose, retighten them immediately. Failure to do
so could result in serious hazard.