2.1 Introduction
The Allied Street Hammer is designed for
u s e o n b a c k h o e s , s k i d s t e e r s a n d
mini-excavators. It is compatible with
carriers weighing 2,000 to 30,000 lbs. (900
to 13,600 kg). The hammers can be in-
stalled on almost any hydraulic system and
can be operated with pump capacities from
4 to 24 g.p.m. (15 to 90 lpm).
The maximum operating pressure is 1900
to 2200 psi (130 to 150 bar). Most of the im-
pact energy is derived from the nitrogen
gas pressure in the head rather than the
hydraulic pressure. See Section 4-1 Tech-
nical Specifications for specific carrier in-
formation.
The Allied Street Hammer is an impact
hammer featuring high single blow energy
and long stroke design.
In place of side plates, the Allied design
suspends the hammer’s working body in a
box enclosure. This isolates the vibration
forces, allowing the hammer to work more
efficiently and reduce vibration to the car-
rier.
2.2 Description of Assembly Groups
•
Cylinder Head
The Cylinder Head is the upper hammer
section.
The nitrogen filling and measuring fit-
ting for the precharge chamber is lo-
cated on the front of the Cylinder Head.
Fitting
G.
2-2
6-1-03
A
LLIED
Street Hammer
AS Series
Figure 2-2. Typical Street Hammer
G
Figure 2-3. Typical Cylinder Head
Summary of Contents for AS 342
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