BHI HydroRam HK300S, Operations Manual & Parts List

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BHI
Best Hammer Industries
- 17 -
Ⅴ. OPERATION AND HANDLING OF HYDRAULIC HAMMER
1. Hammer
1) Proper Positioning
The hammer must be positioned perpendicular
to the material. It is especially important to
follow this rule when using the hydraulic hammer
so that it can correctly test the hardness of the
material. If it is improperly aligned, it could
respond as though it was working in light
material and remain in a high frequency, low
impact mode. When it is properly aligned, it selects best frequency impact combination for
maximum performance with that material at that particular time. When installing a new
Hammer, it is recommended that the Hammer is run in vertical position at about 250~300
blow per minute for one hour. Also after 10 minutes working start is recommended. During
that time avoid Hammering in inclined condition. If the frequency is fast, the impact is low. If
the frequency is slow, the impact is high.
2) Applied Pressure
All hammers must have sufficient pressure
against the tool to allow the transmission of
energy, or the shock wave to flow through the
tool to the material being broken. As the tool
moves through the material, applied pressure is
continuously adjusted by using a combination of
the boom, dipper and attachment controls so
that the hammer follows the tool.
Applied Pressure Must be Correct
If applied pressure is insufficient, the tool will
dance around on the material rather than
sending energy into the rock. When this happens,
impact created by the piston is not transmitted
to the rock as a shock wave but is absorbed by
the hammer and excavator causing abnormal
structural fatigue.