9 TROUBLESHOOTING GUIDE
9.1 Problems in operation
If the Post driver hammer does not work or blow frequency and blow get worse, check following troubleshooting.
And then inspect according to the following order.
Symptom
Cause
Required action
No blow out
1.Excessive back head gas pressure
2.Stop valve (s) closed
3.Lack of hydraulic oil
4.Wrong adjustment of pressure
reducing valve
5.Faulty hydraulic hose connection
6.Oil back head infection
1.Re-adjust nitrogen gas pressure
2.Open Stop Valve
3.Fill hydraulic oil
4. Re-adjustment valve
5.Tighten or replace
6.Replace back head O-Ring, Or
cylinder bush stop seal
Low impact power
1.Line leakage or blockage
2.Clogged tank return line filter
3.Lack of hydraulic oil
4.Hydraulic oil contamination, or heat
deterioration
5.Poor main pump performance
6.Back head nitrogen gas low
7.Low flow rate by mis-adjustment
of flow control pressure reduction valve
8.Tool out of range for blowing position
1.check lines
2.Wash fitter, or replace
3. Fill hydraulic oil
4.Replace hydraulic oil, rinse tand
and release oil inside lines
5.Contact authorized service shop
6.Refill nitrogen gas
7.Re-adjust reduction valve
8.Rush down tool by excavator
Irregular impact
1.Low accumulator gas pressure, of bad
accumulator
2.Bad piston or valve sliding surface
3.Piston moves down/up to blank blow
hammer chamber
1.Refill nitrogen gas
2.Call an authorized service man.
3.Rush down tool by excavator
operation
Bad tool movement
1.Tool diameter incorrect
2.Tool and pin jammed from tool retainer
3.Jammed lower bush and tool
4.Deformed tool and piston contact area
1.Replace tool with genuine
replacement parts
2.Smoothen rough surface of tool
3.Smoothen rough surface of lower
bush interior
4.Replace tool
Oil leakage between front head
and tool
1.Cylinder seal worn
1.Replace seal
Gas leakage
1.O-ring damage in related parts
1.Replace relevant o-ring
WWW.TMGINDUSTRIAL.COM
P17/23
Toll Free:1-877-761-2819
