TM 5-3805-281-24-2
Hydraulic Impact Breaker
33
3. Observe gauge readings while breaker is operating in
67
material. (Working pressure tends to increase up to
maximum value, depending on hardness of material to
be broken.)
4. Move excavator to softer material and operate in same
manner. Frequency (speed) should increased to
specification maximum. (Correspondingly, working
pressure tends to decrease to specification minimum.)
5. If breaker is too much, some adjustment shims may be
added under spring to increase speed and reduce
impact power. See the below list. If hammer shows
difficulty in breaking/penetrating, some adjustment
shims may be removed from under spring to increase
power and reduce speed. Alternatively, shims can be
added under spring to power valve, to increase
developed power of breaker.
Continued on next page
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