Troubleshooting - Tar River BPD-680 Operator's Manual

BPD-680/750 Post Hole Driver
Problem
The driver-breaker fails to
strike
The striking frequency is
normal at first, but be-
comes irregular with use
Weak striking force
Low striking frequency
The oil temperature rises
too fast
The hydraulic oil is emul-
sified
The engine speed is re-
duced sharply

Troubleshooting

Possible Cause
The driver head/breaking chisel is jammed
Insufficient hydraulic oil
Oil temperature is too low
Improper main valve operation
The internal pressure of the back head is too
low
There is hydraulic oil leakage in the cap
chamber of the back head
Poor working performance of the hydraulic oil
Oil temperature rise, caused by oil shortage
Excessively high pressure in the back head
The lowering pressure of the attachment
insufficient
The driver head/breaking chisel is excessively
worn
The hydraulic oil pump is in poor performance
The gas pressure in the back head is relative-
ly low
The gas pressure is too high
The lowering pressure of the attachment is
insufficient
The working pressure is too high
Poor working performance of the hydraulic oil
The heat dispersion of the excavator is
not good; the hydraulic pump is under
premature abrasion and the pipeline is
blocked
The oil is mixed with water
The output power of the engine is insufficient
The engine performance is downgraded
The oil temperature is too low
Inspect and replace worn parts
Supplement the hydraulic oil
The oil temperature should be at least 87
Inspect the operation of the breaking
Inspect the Nitrogen pressure
Replace the sealing elements
Immediately contact the excavator manufac-
Supplement the hydraulic oil
is
Inspect the boom and arm of the excavator
Remove the part and make inspections, re-
Have the oil pipeline inspected by the exca-
Inspect the boom and arm of the excavator
Have the oil pipeline inspected by the manu-
Change the settings of the attachment; in-
spect or replace the hydraulic pump
Replace the hydraulic oil immediately
Lower the pressure in the back head
Lower the position of the throttle; require the
excavator manufacturer to make an inspec-
17
Solution
degrees Fahrenheit/
in the driving cab
turer
Inspect the gas pressure
placing if necessary
vator manufacturer
Inspect the gas pressure
Inspect the gas pressure
Inspect the set pressure
facturer
tion
Preheat before operation
button