Soosan SB70 - 9. Trouble Shooting

Soosan H
y
draulic Breaker
Soosan Heav
y
Industries Co.
,
Ltd
10. Trouble Shooting
The trouble-shooting chart is prepared to help operators find out causes and remedies instantly when
troubles occur. When a trouble is found, have a good grip of the problem and contact our service station.
When diagnosing faults in operation of the breaker, always check that hydraulic power source is supplying
the correct hydraulic flow and pressure to the breaker as listed in the table.
Check the flow with the hydraulic oil temperature at least 176 /80 . An approved test procedure is ℉℃
available form Soosan.
TROUBLE CAUSE REMEDY
1. Breaker fails to hammer
* Sufficient high pressure oil does
not flow to breaker inlet.
* Sufficient high pressure oil flows
to breaker inlet.
* Defective hose or pipes·
* Clogged or damaged piping
* Defective control valve and
related parts
* Insufficient hydraulic oil
* Internal breaker defects
* Check, clean and repair piping
or replace with new one.
* Check and repair valve and its
related parts or replace with
new one.
* Refill oil tank.
* Consult with our service station.
2. Breaker hammers with
hammering force reduced.
* Sufficient high pressure oil does
not flow to breaker inlet.
* Sufficient high pressure oil
flows to breaker inlet.
* Defective hose or pipes
Clogged piping, Oil leakage
* Defective control valve and
related parts
* Deformed pedal
* Deformed control valve
* Stuck control valve
* Insufficient control valve
stroke due to loose screws
* Clogged filter in return line of
base machine tank
* Insufficient hydraulic oil
* Contaminated or deteriorated
hydraulic oil
* Defective pump
* Internal breaker defects
* low N
2
-gas pressure of back
head
* Check, clean and repair piping
or replace with new one.
* Check control valve and related
parts or replace with new one.
* Clean or replace.
* Refill.
* After flushing tank, change oil
entirely.
* Ask service station for base
machine service.
* Consult with our service station.
* Adjust the gas pressure referring
to Chapter 10.
3. Hammering force weakens
suddenly and high pressure
hose vibrates excessively
during operation.
* Defective Back Head Gas
leakage
* Ask our service station for repair.
4. Excessive oil leakage from
Front Head or Rod.
* Worn cylinder seals * Ask our service station for repair.
5. Piston works but does not
hammer.
* Stuck in rod
* Remove front parts and pull out
rod.
* Repair with a grindstone.
Ask base machine service station to repair defective base machine.※