2.4 Wheel Bearing

Type : TC 25 Planetary-rigid axle in 6 Wheel Forwarder FW 1011 Drawing no.: SAP 7501.164 Valid as of Serial no. 01 Preparation of data : September, 30, 2005 Author: Rauh

(see Fig. 14) 2.4.1 Wheel Bearing Exchange

• Remove planetary cage (No.13) complete (section 2.3.1). • Disassemble sun gear shaft (No.40), (section 2.3.2). • Screw off groove nut (No.30) with an special groove socket wrench WZ 081.

For this, heat groove nut M 85x2 (No.30) to approx. 150°C, (i.e. with soldering torch) and loosen with the special groove socket wrench WZ 081. The loosening moment can reach up to 2000 Nm. • Pull off wheel hub (No.34) and outer gear bearing (No.36), simultaneously from the axle stub (No.27), with an appropriate extractor. • Press axial face seal (No.29) and outer bearing ring from the gear bearing (No.31 a. No.36) from the wheel hub (No.34) and renew with the appropriate assembly tools • Press axle stub ring (No.30) and bearing inner ring (No.31) with an extractor simultaneously from the axle stub (No.27) • Replace O-ring (No.49) in axle stub ring (No.30) and press with a new bearing inner ring (No.31) onto the axle stub (No.27).

Assembly temperature for the bearing inner ring (No.31) max. 80°. • Set new axial face seal (No.61) into wheel hub (No. 34) and into spindle ring (No.30) with an special installer ring (WZ 234). The face seals are very brittle, be careful not to brake them. • Clean thread M 85x2 of the axle stub (No.27) and nut (No.39) of dirt, oil, adhesive, and, and inhibitors • Centrally insert wheel hub and assemble heated bearing inner ring (No.36) onto the axle stub (No.27) completely, use assembly sleeve when needed. • Coat end faces of the crown gear carrier (No.38) with Klüber-Paste Wolfracote SSP • Insert crown gear carrier (No.38) with crown gear (No.1) • Adjust wheel bearing (see section 2.4.2) and tighten groove nut (No.39) with special socket wrench • Insert sun gear shaft (No.40), to ease meshing lightly turn sun gear back and forth for insertion into coupling sleeve (No.23). Or install with complete planetary cage together (see section 2.3.2) • Reassemble planetary cage (No.13) (see section 2.3.1).

Type : TC 25 Planetary-rigid axle in 6 Wheel Forwarder FW 1011 Drawing no.: SAP 7501.164 Valid as of Serial no. 01 Preparation of data : September, 30, 2005 Author: Rauh

2.4.2 Wheel Bearing Adjustment

• Measure distance „X1“ on the axle stub (No.27) (theoretical = 22 +/- 0.2) „X1“ = Distance between end face on axle stub (No.27) and shoulder for adjusting washers (No.62) • Coat end face of the crown gear carrier (No.38) with Klüber-Paste Wolfracote SSP • Screw on nut (No.39) and tighten until a bearing preload of approx. 30 to 35 Nm (with seals) is achieved at the wheel bearings. Align roller cage and wheel bearing, during this, turn wheel hub 1-2 times in both directions and continuously tap lightly a hammer on the outside of the wheel hub (No.34) and crown gear carrier (No.38). • Measure distance „X2“ (theoretical „X2“ = 20 +/- 0.75). „X2“ = Distance between end face on axle stub (No.27) and end face of crown gear carrier (No.38) • Select washer thickness „d“ of the adjusting washer (No.62) „d“ max = „X1“ - „X2“ „d“ min = („X1“ - „X2“) - 0.15 • Again loosen nut (No.39) and remove • Clean thread M 85x2 of axle stub (No.27) and groove nut (No.39) of oil, dirt, inhibitors, and adhesive residue. • Again coat end face of crown gear carrier with Klüber-Paste Wolfracote SSP (DO NOT coat groove nut No. 39) • Coat entire diameter M85x2 and length of axle stub (No.27) and groove nut (No.39) with Loctite 262 • Thread on groove nut (No.39) with WZ 081 and tighten with 2000+200 Nm. With the use of the torque amplifier Sk 2.90-1033 with a ratio of 5:1, tighten with 400 Nm. • The final location of the axle stub (No.39) must be achieved within 2-5 minutes, in order for the

Loctite to achieve its full potential.

Fig.13