# To fill the pulse unit 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 indication of not enough oil is a decreased tightening torque and an increased pulse frequency.

After disassembly of pulse unit, fill with oil according to operation No. 1-3 below. Run the machine in a vice for 10 seconds according to operation No. 5 below. Then continue according to operation No. 6-11. For best performance use Atlas Copco pulse unit oil Bio. The Oil Filling Kit is composed of Atlas Copco Pulse unit oil Bio 150 ml and a syringe (1 ml). Ordering No. : 4081 0121 90.