Tar River BPD-680, Operator'S Manual

Page: 17 / 36

17
BPD - 680/750 Post Hole Driver
Troubleshooting
Problem Possible Cause Solution
The driver - breaker fails to
strike
The driver head/breaking chisel is jammed Inspect and replace worn parts
Insufficient hydraulic oil Supplement the hydraulic oil
Oil temperature is too low
The oil temperature should be at least 87
degrees Fahrenheit/
Improper main valve operation
Inspect the operation of the breaking button
in the driving cab
The internal pressure of the back head is too
low
Inspect the Nitrogen pressure
There is hydraulic oil leakage in the cap
chamber of the back head
Replace the sealing elements
Poor working performance of the hydraulic oil
Immediately contact the excavator manufac-
turer
The striking frequency is
normal at first, but be-
comes irregular with use
Oil temperature rise, caused by oil shortage Supplement the hydraulic oil
Excessively high pressure in the back head Inspect the gas pressure
The lowering pressure of the attachment is
insufficient
Inspect the boom and arm of the excavator
The driver head/breaking chisel is excessively
worn
Remove the part and make inspections, re-
placing if necessary
The hydraulic oil pump is in poor performance
Have the oil pipeline inspected by the exca-
vator manufacturer
Weak striking force
The gas pressure in the back head is relative-
ly low
Inspect the gas pressure
Low striking frequency
The gas pressure is too high Inspect the gas pressure
The lowering pressure of the attachment is
insufficient
Inspect the boom and arm of the excavator
The working pressure is too high Inspect the set pressure
Poor working performance of the hydraulic oil
Have the oil pipeline inspected by the manu-
facturer
The oil temperature rises
too fast
The heat dispersion of the excavator is
not good; the hydraulic pump is under
premature abrasion and the pipeline is
blocked
Change the settings of the attachment; in-
spect or replace the hydraulic pump
The hydraulic oil is emul-
sified
The oil is mixed with water Replace the hydraulic oil immediately
The engine speed is re-
duced sharply
The output power of the engine is insufficient Lower the pressure in the back head
The engine performance is downgraded
Lower the position of the throttle; require the
excavator manufacturer to make an inspec-
tion
The oil temperature is too low Preheat before operation