Dawson HPH 1200, User Manual

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1.0 INTRODUCTION
The D.C.P. Hydraulic Hammer has been designed and manufactured to meet the demands of today's
contractor. The hammer has many advantages over traditional piling hammers, including other
hydraulic hammers:-
- The hammer fits all British and most foreign single sheet piles as well as numerous 'H' piles using
one set of legs and inserts. It will also fit pairs of sheet piles and open bent corners with the same
configuration. This significantly improves productivity and reduces costs.
- The hammer does not have a single electrical component on it. This means no vulnerable
electrical cable running across the site and no delicate electronics on the hammer. All competent
fitters can understand this hammer.
- Hydraulic hammers are inherently efficient, typically 80-90% of the potential driving energy
being transferred into the pile as opposed to 25-35% for diesel hammers.
- Rapid blow rate. The hammer is double acting, not only giving high energy output, but
increasing the speed of operation. This inevitably increases production and keeps the pile on the
move.
- Infinitely variable stroke controlled, between limits, at the touch of a button. This enables precise
energy control which is very important when commencing piling or when coping with delicate
operations.
- Robust construction. The hammer has been designed with full knowledge of what is required of
piling equipment. A quick look at the hammer sitting on a pile will confirm this.
- With the hammer weighing only 3 tonnes, it lends itself to being used on long reach jobs where
there are few economic alternatives.
- Noise levels are considerably lower than that of diesel or air hammers.
- Transmitted ground vibrations have been measured lower than that of a vibrator.
1.1 Basic Safety Points
- Ear protection should be worn when in close proximity of the hammer.
- Keep clear of the hammer and/or power pack when they are being lifted.
- Avoid standing directly below the hammer when it is piling.
- Adhere to maintenance requirements set out in this manual.
- Lift equipment using lifting points specified only (see figures over).
1.2 Transportation and laying down hammer
- BEFORE operating hammer first time AND after each lay-down use inspection holes to ensure
dolly is seated correctly in anvil before striking.
- WHEN LAYING DOWN HAMMER, support top of hammer at higher level than bottom of
hammer.
- TRANSPORTATION, support top of hammer at higher level than bottom of hammer.