Refill the Pulse-Unit with Oil

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 necessary 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 tightening.

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 Atlas Copco Pulse Unit Oil.

Running the machine with too little oil may damage the pulse unit.

After the refill – Check the tightening torque, see Service instructions.