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14 ► MB656 User Manual
OPERATION
While “Blank Firing” cannot always be avoided, it can be
kept to a minimum by avoiding the above conditions as
much as possible.
UNDERWATER USAGE
Underwater usage of the breaker will cause damage
to internal components. Even if the breaker is partially
submerged, water is introduced to an area between the
tool bit and piston. On the piston down cycle, the water
becomes compressed and damages adjacent compo-
nents.
Do not use underwater without supplying air to breaker.
Figure 10. Underwater Restrictions
Do not use underwater without supplying air to breaker
CAUTION
No part of the breaker may be submerged in
water. Underwater usage of the breaker will cause
internal damage to the breaker. Consult Stanley for
modications and specic warranty coverage if you
have an underwater requirement.
The breaker is equipped with an underwater port on the
side of the breaker. Connect an air line to this port and
supply the required air pressure and ow to the breaker
when using underwater. The following chart shows the
air ow rate and pressure required for various depths of
operation.
Depth/Feet Pressure/PSI
Air Flow Rate/
cfm
60 53 69
50 44 60
40 35 52
30 27 44
25 22 39
20 18 35
15 13 31
10 9 27
5 4 23
0 0 18
GREASE THE BIT
Grease should be applied to the upper end of the break-
er tool bit each time it is installed. Thereafter, the tool
should be greased at the tting to reduce wear in the
lower body and bushings of the tool. See Greasing The
Tool Bit in the sections titled Pre-Operation Procedures.