Allied Hy-Ram HR270, Safety, Operation And Maintenance Instructions, Page: 51 / 60

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SOMM577202_14mar
40
13.0 Troubleshooting Guide [cont’d]
Condition Possible Cause Corrective Action
Breaker operates but
at reduced impact
Back head charge is low Fill back head to proper pressure
Operating pressure too low Refer to section “Operating Pressure Too Low”
Improper Breaker operation
Tool binding in bushing
Maintain right angle to work surface. Refer to Section
6.0
Check breaker tool is receiving sufficient lubrication.
Check operation of AutoLube. Use Chisel Paste
Breaker tool / bushings are worn
Return line pressure too high Refer to section “Return Line Pressure Too High”
Control valve [Carrier]
misadjusted or malfunction Incorrect working mode. Check for mechanical or pilot
circuit failure
Hydraulic oil overheating Oil temperature should not exceed 176

F [80

C]
Impact rate slows
down
Hydraulic oil is overheated Refer to section “Operating Temperature Too High”
Return line pressure too high Refer to section “Return Line Pressure Too High”
Excessive charge pressure in
back head
Readjust to correct pressure
Flow too low
Measure oil Flow – Set to value listed in the
specifications section of this manual
Leakage in hydraulic circuit
[Carrier]
Test hydraulic components for malfunction
Oil viscosity too low
Consult carrier manufacturer for recommended oil
type
Breaker tool is binding
Maintain right angle to work surface. Refer to Section
6.0
Check breaker tool is receiving sufficient lubrication.
Check operation of AutoLube. Use Chisel Paste
Breaker tool / bushings are worn
Excessive pulsations
in pressure hose
No gas charge in accumulator Stop breaker operation until accumulator is repaired