Atlas Copco EP 7PTX-55 HR10-RE Produktanweisungen Seite 6

Safety and operating instructions
Refill the pulse-unit with oil
For further information pls see - Service Instructions.
For optimum machine performance the pulse unit must be correctly filled with
oil. Due to a possible microleakage of oil from the pulse unit, it could be neces-
sary to refill the unit between the regular overhaul intervals. The frequency of
this procedure depends on the type of application, number of cycles, tightening
time etc. An accurate refill of the pulse unit gives long service intervals.
Too much oil in the pulse unit implies a low pulse frequency and slow tighten-
ing.
Too little oil in the pulse unit implies a high pulse frequency and there will be a
risk of a decreasing tightening torque. In particular at the first tightening after a
break the machine might race.
Use Hydraulic Oil : 22 cST / 40 °C (ISO VG22).
Running the machine with too little oil may damage the pulse unit.
After the refill – Check the tightening torque, see Service instructions.
Rust protection and internal cleaning
Water in the compressed air, dust and wear particles cause rust and sticking of
vanes, valves etc. An air filter should be installed close to the machine (se 'Air
quality'). Before longer standstills, flush with oil (some drops) into the air inlet,
run the machine for 5-10 seconds when absorbing the oil in a cloth.
Service instructions
Overhaul and preventive maintenance is recommended at regular intervals once
per year or after maximum 250.000 tightening depending on which occurs
sooner. More frequent overhaul may be needed, specially replacing of oil in the
pulse unit, if used at high torque and long tightening times. If the machine is not
working properly, it should immediately be taken away for inspection.
The strainer at the air inlet and the exhaust silencer should be cleaned fre-
quently or replaced in order to prevent clogging, which decreases the capacity.
At the overhauls, all parts should be cleaned accurately and defective or worn
parts should be replaced.
All o-rings should be greased before assembling; especially important are
the o-rings in the pulse unit.
Disassembling /assembling
It is important that the machines threaded connections are tightened properly;
i.e. in accordance with the specifications on the exploded views.
Cleaning
Clean all parts, not electrical, thoroughly in white spirit or similar cleaning
agent. To prevent clogging and decreased power, it could be necessary to clean
the strainer (if used) and the exhaust filter between the overhauls.
Inspection
After the cleaning, inspect all parts. Damaged and worn parts should be re-
placed.
6
EN
© Atlas Copco Industrial Technique AB - 9836 950700 00
EP7PTX55 HR10-RE