Inspection And Maintenance - Hitachi NV 90HMC Handling Instructions Manual

English
(1) Attaching and detaching nose cap
The nose cap can be attached by simply pressing it into
the push lever.
Press it in until a convex part inside the nose cap enters
into a hole of the push lever. (Fig. 17)
For removal, insert a thin rod such as a screw driver into
the gap on the back of the push lever, and then pull it
out.
(2) Safekeeping of nose cap
Put the removed nose cap in a space behind the
magazine for safekeeping. (Fig. 18)

INSPECTION AND MAINTENANCE

CAUTION
Be sure to disconnect the hose during cleaning jams,
inspection, maintenance and cleaning.
1. Countermeasure for nail jamming
(1) Remove the nail roll from the magazine, open the nail
guide, insert a rod into the outlet and tap the rod with a
hammer (Fig. 19).
(2) Remove the jammed nail with slotted screw driver
(Fig. 20).
(3) Cut off the defective part of the steel wire which links the
nails with cutting nippers, correct the deformation, then
load the nail roll in the magazine.
(4) In case of frequent jams, consult the Authorized Service
Center from which you bought this machine.
2. Check on mounting screws for each part
At regular intervals check every part for loose mounting
screws and whether or not there are any air leaks.
Retighten any loose screws. Operating the equipment
with loose screws untightened will incur a hazard.
3. Inspecting the push lever
Check if the push lever can slide smoothly (Fig. 21).
Clean up the sliding area of the push lever and use the
provided oil for lubrication from time to time. Lubrication
enables smooth sliding and simultaneously serves to
prevent the formation of rust.
4. Inspecting the feeders
(1) Occasionally clean the knob sliding part and then apply
the recommended oil (See Fig. 21).
(2) Open the nail guide and remove dust, etc., as shown
in Fig. 22. Apply lubricant to the sliding groove of the
feeder and shaft. Check the nail stopper (A) and nail
stopper (B) slide smoothly by pushing them with your
fi nger.
(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 fi red at an irregular angle, presenting a hazard to the
operator and others nearby.
5. Inspect the Trigger
Periodically clean the sliding parts of the trigger, and
make sure that the trigger moves smoothly (Fig. 23).
6. Inspecting the muffl er
This Nailer has a built-in muffl er in the exhaust to reduce
noise and stirred-up dust during exhaust.
When the mesh of the muffl er is fi lled or the muffl er
is damaged, replace the muffl er with a new one. To
replace the muffl er, contact our Authorized Service
Center (Fig. 24).
7. Inspecting the magazine
Clean the magazine. Remove dust of wooden chips
which may have accumulated in the magazine.
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8. Storing
○ When not in use for an extended period, apply a thin
coat of the lubricant to the steel parts to avoid rust.
○ Do not store the Nailer in a cold weather environment.
Keep the Nailer in a warm area.
○ When not in use, the Nailer should be stored in a warm
and dry place.
Keep out of reach of children.
9. Service parts list
CAUTION
Repair, modifi cation and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the tool to
the Hitachi Authorized Service Center when requesting
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 modifi ed to incorporate the latest technological
advancements.
Accordingly, some parts may be changed without prior
notice.
COMPRESSOR
CAUTION
When the maximum, operating pressure of the air
compressor exceeds 23 bar (320 psi.), be sure to
provide a reducing valve between the air compressor
and nailer. Then, adjust the air pressure within the
operating range of 12 – 23 bar (170 – 320 psi.). If the
air set is installed, lubrication is also possible, thus
providing additional convenience.
APPLICABLE LUBRICANTS
Type of lubricant
Recommended oil
Motor oil
Turbine oil
Name of lubricant
SHELL TONNA
SAE10W, SAE20W
ISO VG32 - 68 (#90 - #180)