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3. Dismounting (Fig. 14)
Remove the core bit shank from the rotary
hammer and strike the head of the core bit
shank strongly two or three times with a manual
hammer holding the core bit, then the thread
becomes loose and the core bit can be
removed.
HOW TO REPLASE GREASE
This machine is 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:
⅜ Before replenishing the grease, turn the power off and pull out the power plug.
(1) Remove the crank case cover and wipe off the
grease inside.
(2) Apply 0.7 oz (20 g) of HITACHI Electric Hammer
Grease A (standard accessory, contained in
tube) to the crank case.
As the tube contains 1 oz (30 g) of grease,
supply 2/3 of the contained grease.
(3) After replenishing the grease, install the crank
case securely.
NOTE: The HITACHI Electric Hammer Grease A
is of the lower viscosity type. When the
supplied grease tube is consumed,
purchase from a HITACHI Autorized
Service Center.
Fig. 14
Core Bit Shank
Fig. 15
Crank Cover