40
The test run is necessary in the following cases.
⚫
When mount a brand new breaker on the excavator.
⚫
When assemble the connecting hose to an excavator after long term storage of a breaker.
⚫
In case of the repair or over haul of a breaker
①
Replenishment the hyd, oil up to the highest level of oil level. （under the condition of the boom of
a excavator is lowered.）
②
Supply the hyd, oil gradually in order to remove air bubbles in side hyd, breaker and to fill up the hyd,
oil in the breaker. （Squeeze the throttle and slowly press the operation pedal of a hyd, breaker5-6
times with half open operation. ）
③
Check any looseness on the bolts and nuts of a breaker and of a bracket.
④
Check the abnormal noise, vibration and oil leakage from a breaker.
⑤
Check if any oil leakage from the connecting hose and fittings.
⑥
Check if any irregular movement, twist and interference of hyd, hose,
(1)Excavator
(2)Air
removal time
(3)Seal
recovery time
(4)Preparation
time
(5) Preparation
time
New unit
More than 5
min.
More than 10
min.
Less than 50％
Throttle 10 min.
At 70％
Throttle 20 min.
After the hose
has been
removed
After the
breaker has
been repaired
More than 10
min.
More than 15
min.
⚫
Process (2) & (3) must be performed as shown
in Fig. 2 where the breaker is lifted up and held
straight up.
⚫
When performing process (2) & (3) make sure
the breaker does not impact by adjusting the
operating pedal accordingly.
CAUTION
Fig.2
CAUTION
⚫
The air will mix into the hyd, oil circuit of piping and hyd, breaker when assemble the breaker
onto an excavator.
Under this condition start to operating the breaker all of sudden, it results in the oil film cut
and can cause the seizure of piston and cylinder.
⚫
Slowly supply the hyd, oil for the shake of removing air bubbles and fill in the hyd, oil.
（Squeeze the throttle and gradually open the operation pedal of a hyd, breaker in half way）
⚫
Follow the process of air bubble removal to warming up in order of (2),(3),(4),(5).
⚫
Test run time of each process are shown below table and keep the time according to below
table.
Do not let it impact.
Operation
Summary of Contents for TNB-08M
Page 133: ...TOKU Pneumatic Co Ltd...
