TM 5-3805-281-24-2
Hydraulic Impact Breaker
33
If flow meter reading indicates that pressure is ABOVE
64
recommended average in Owner's Manual, engine rpm
may be reduced until recommended pressure level is
achieved. To work on flow from breaker, SLOWLY adjust
flow meter restrictor to fully closed position. Observe
where circuit relief starts to "crack" (flow drops off). Also
observe point at which circuit relief is "fully open" (flow is
Zero). This figure must be a minimum of 600 psi over the
maximum operating pressure of the breaker. Adjust or
correct before proceeding!
CED,OUOE039,5
1920MAR993/9
BREAKER INSUFFICIENT OIL FLOW ADJUSTMENTS
If pressure reading obtained is BELOW average
recommended value in Owner's Manual, make necessary
corrections to meet specification (e.g. check carrier
diverter valve, filters, piping, check OEM specifications for
breaker size capacity). If flow is still not adequate, as a
last resort, adjustment shims (B) must be inserted
underneath spring (C) into guiding plug (A) in the following
procedures:
1. Stop engine.
2. Discharge pressure in pipes by operating breaker
circuit while engine is stopped.
3. Bleed oil tank air to reduce pressure.
4. Move ball check valves to OFF position.
5. Move breaker to horizontal position, curving it under
boom.
6. Cap off hammer return line to avoid oil leakage.
Continued on next page
CED,OUOE039,5
1920MAR994/9
20-60
