Hitachi VH-650 Handling Instructions Manual page 10

English
CAUTION
A cracked drive bit may cause damage. Prior to
reassembling the drive bit, be sure to check for such
cracks.
4. Inspecting the piston
A depletion of cylinder oil or a worn O-ring may
restrict smooth operation. In such instances remove
the piston as illustrated in Figs. 6, 7 and 9 and clean the
cylinder interior. Then apply 2cc of the recommended
oil over the cylinder interior surface. If the piston still
refuses to offer smooth operation, replace the worn
O-ring.
Also, apply a thin coat of grease (Attolub No. 2 Grease)
to the cylinder interior and the O-ring.
CAUTION
Never clean the O-ring with gasoline, thinner, or
similar substance.
5. Inspecting the feeders
(1) Occasionally clean the knob sliding part and then
apply the recommended oil. (See Fig. 10)
(2) Open the nail guide as shown in Fig. 11.
Then successively depress the main feeder, subfeeder,
and main nail stopper and sub nail stopper to check on
smooth operation. Remove accumulated dirt and apply
the provided oil to the sliding groove and shaft.
(3) Also, apply the recommended oil to the feeding sur-
face of the nose and nail guide after cleaning. This
promotes smooth operation and retards corrosion.
CAUTION:
Check for smooth movement of the feeders and
stoppers before use. If movement is uneven, nails
could be fired at an irregular angle, presenting a
hazard to the operator and others nearby.
6. Service parts list
A : Item No.
B : Code No.
C : No. Used
D : Remarks
CAUTION:
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the tool
to the Hitachi Authorized Service Center when re-
questing repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
MODIFICATIONS:
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
COMPRESSOR
CAUTION:
When the maximum, operating pressure of the air
compressor exceeds 8.3 bar (120 psi.), be sure to
provide a reducing valve between the air compressor
and nailer. Then, adjust the air pressure within the
operating range of 4.9 ~ 8.3 bar (70 ~ 120 psi.). If the air
set is installed, lubrication is also possible, thus
providing additional convenience.
9
OILER-FILTER-REDUCING VALVE (Air Set)
So that the equipment can be operated under an optimum
condition to ensure extended service life, it is advisable to
use an oiler filter reducing valve. Please limit the length of
the hose between the unit and the air set to within 10m
when using.
APPLICABLE LUBRICANTS
Type of lubricant
Recommended oil
Motor oil
Turbine oil
Noise Information
Noise characteristic values in accordance with EN 792-13,
JUNE, 2000:
The typical A-weighted single-event sound power level
The typical A-weighted single-event emission sound
pressure levelat work station
These values are tool-related characteristic values and
do not represent the noise development at the point of
use. Noise development at the point of use will for
example depend on the working environment, the
workpiece, the workpiece support and the number of
driving operations, etc.
Depending on the conditions at the workplace and the
form of the workpiece, individual noise attenuation
measures may need to be carried out, such as placing
workpieces on sound-damping supports, preventing
workpiece vibration by means of clamping or covering,
adjusting to the minimum air pressure required for the
operaion involved,etc.
In special cases it is necessary to wear hearing protection
equipment.
Vibration Information
The typical vibration characteristic value in accordence
with EN 792-13, JUNE,2000: 2.5 m/s
This values is a tool-related characteristic value and does
not represent the influence to the hand-arm-system
when using the tool. An influence to the hand-arm-
system when using the tool will for example depend on
the gripping force, the contact pressure force, the working
direction, the adjustment of energy supply, the workpiece,
the wrokpiece support.
Name of lubricant
SHELL TONNA
SAE10W, SAE20W
ISO VG32 – 68
(#90 – #180)
L ,1s,d = 100 dB
WA
L ,1s,d = 86 dB
pA
2