Mechanicaldrivegearunit–2550

Changing of the drive shaft’s sealing ring

Assembling

Assemble the gear after changing the drive shaft’s sealing ring in reverse order.

Pay special attention to the following during assembling:

•Fill the sealing ring with grease after fitting it on the drive shaft.

•Make sure that only undamaged shim washers with the same total thickness as the originals are put on the drive shaft.

•Press the bearing on the drive shaft and make sure not to damage the bearing’s shim washers.

•When fitting the drive shaft with bearing, shim washers and seal, make sure that the shaft keys correspond with the crown gear’s keys and that the bearing and seal are correctly positioned in the gear housing before the shaft is pressed in completely.

•Put the distance ring on the drive shaft end, and put on the shaft nut. Always use a new nut. Tighten the shaft nut to a torque of 300 Nm and lock it with a punch mark in the middle. The drive shaft nut should be lubricated before it is put on the shaft.

•Change the gasket before fitting the bottom cover. Make sure that it is not damaged. Fit the cover and tighten the bolts to a torque of 26.6 Nm. The bolts should be lubricated before they are fitted. Fill up with oil in accordance with the instructions for replenishing the oil.

Fit the drive gear and tighten the bolts to a torque of 65 Nm.

Mechanicaldrivegearunit–2550

Changing of the drive shaft’s sealing ring

677, 678, 679723984-DateOrdernumber 2005-02-02222995-040

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9 Brake disc

10 Hub

10.2Maintenance

Basically the brake is maintenance free in normal work environments. However it is recommended according to the preventive maintenance schedule to check the brake disc for wear.

10.2.1Exchangeofbrakedisc

The brake disc shall be exchanged when its total thickness has been reduced to 5,5 mm.

•Disconnect the electrical wires of the brake.

•Undo and remove the two fastening bolts.

•Loosen the brake disc from the hub and check for wear and tear. Replace the brake disc if the surface is unevenly worn.

•Reassemble the brake.

•Reconnect the electrical wiring.

9,5 Nm

Ustawianieszczelinyhamulca

0,3

Nominalna szczelina powinna wynosic 0,3 mm. Jednakze w niektorych przypadkach ze wzgledu na duze zapylenie szczelina powinna wynosic max. 0,5 mm

Regulacja:

•Loosen the tension of the three mounting bolts .

•Turn the lock nuts anti-clockwise and tighten the bolts slightly while checking the gap onthreepoints with a 0.3 mm feeler gauge.

•Tighten the mounting bolts 9,5 Nm and recheck the gap with the feeler gauge.

11.2.2Exchangeofbrakedisc

The brake disc shall be exchanged when its total thickness has been reduced to 6 mm.

•Disconnect the electrical wires of the brake.

•Loosen and remove the three mounting bolts and remove the brake coil.

•Replace the brake disc on the hub and make a visual inspection of the wear of the friction plate. Replace the friction plate if the surface is worn uneven.

•Unwind the lock nuts on the coil at least 6 mm to make sure there is a gap between the coil and the pressure plate when the coil is refitted.

•Mount the coil on the motor end and carry out adjustment of the gap according to chapter “Basic Adjustment of gap”.

•Reconnect the electrical wiring.