Allied AR110C, Safety, Operation And Maintenance, Page: 48 / 60

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SOM576701_14jan
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13.0 Troubleshooting [cont’d]
Condition Possible Cause Corrective Action
Operating pressure too
low
Relief valve set too low
Set to value listed in the specifications section of this
manual
Leakage in carrier’s hydraulic
circuit Test hydraulic components for malfunction or improper
adjustment
Insufficient pump delivery [low
flow results in low pressure]
Check pump flow [Measure with flow meter]
Flow control set improperly
Set to value listed in the specifications section of this
manual
Hot Oil Temperature
Operating pressure too high or
too low Refer to section “Operating Pressure Too High” or
“Operating Pressure Too Low”
Relief valve set too low
Set to value listed in the specifications section of this
manual
Ambient temperature is high
Auxiliary cooler may be required
Check with carrier manufacturer
Tool binding in bushing
Check breaker tool is receiving sufficient lubrication.
Use Chisel Paste
Return line pressure too high Refer to “Return Line Pressure Too High” section
Excessive cycle time
Limit hammering time to 30 seconds maximum
Review operating technique Section 6.
Oil flow too high
Set to value listed in the specifications section of this
manual
Breaking cycle too long
Review operating technique and application. Reduce
advance. Evaluate breaker size to material
Oil viscosity too low
Review Section 6.4.3. Adjust oil to match ambient
temperatures. Optimum oil viscosity @ operating
temperature is 60 – 30 cSt. Consult carrier
manufacturer for recommended oil.
Cooling system fault Clean cooler, repair
High Return Pressure
Flow restricted from blocked
hoses or fittings
Remove blockage, replace damaged hoses or fittings
Flow restricted from hoses or
fittings too small for installation
Replace with proper size hose and fitting
Flow restricted from small ports
in valve bank Return line must by-pass valve bank and be routed
directly to the filter.
Flow restricted from cooler or
return filters Repair or replace cooler
Change filter