Page 16
32
31
8. Repairs to Gearbox
8.1 Removal and Re-assembly of Gearbox (fig. 30 and 31)
• Drain oil (see data sheets D 134 + D 137).
- Fresh oil at (K) / Bearing oil LP at (K
1
) and HP at (K
2
)
- Gearbox oil at (K
3
)
• Remove drive motor (see page 12).
• Remove locking ring (87) on the drive shaft (72).
• Pull coupling (G
3
) from the drive shaft with a puller.
• Take out key (151).
• Remove allen screws in bearing cover (81) and withdraw bearing
cover from drive shaft (72) with sealing (83) (and shaft seal (82)).
• Dis-connect all oil lines from the oil pump (185) (marking
identification).
• Remove oil pump (185) with seal (88).
• Remove oil pump flange (80) with seal (83) (shaft seal (82) is
located in the flange (80)).
• Remove spring shim (79).
• Unscrew all screws in the gear box (70) - including those around
the coupling.
• With the puller (W
7
) loosen the gearbox housing (70) from the
locating pins (108) while turning the screws simultaneous and
remove it.
• Re-assembly in reverse order. Note the following:
- Bearing cover (80) and shaft seal (82) will be carefully pushed
without sleeve along the shaft.
- Bearing cover (81) and
shaft seal (82) will be
mounted with assembly
sleeve type III (W
3
).
• Re-assembly of drive (see
page 12).
• Refill with oil (see data
sheets D 134 + D 137).
- Fresh oil at (H)
- Bearing oil LP at (H
1
) and
HP at (H
2
)
- Gearbox oil at (H
3
)
8.2 Changing Gear Wheels and Ball Bearings in Gearbox
Housing (fig. 31 and 32)
• Removal and Re-assembly of gearbox.
• Withdraw both bearings (26) with a puller (W
8
) (do not use the
bearings again).
• Bend back locking tab (77).
• Remove shaft nut (78) with a C spanner (W
9
).
• Remove back locking tab (77).
• Pull off gear wheels (73) and (75).
• Assemble in reverse order.
• Before pressing on bearing (26) their inner ring should be
warmed to 100°C.
W
9
89
108
75
72
73
26
W
8
70
W
7
30
185
80
87
81
G
3
G
3
