Servicing and repair 53/70
RE 79022-01-B/04.2020, General Operating Instructions HYDROTRAC GFT 8000 series 40, Bosch Rexroth AG
Changing the lubricating oil via the motor side:
Observe the information on the planetary gearbox dimensioned drawing in
appendix D “Technical data / Drawings” of the material number-specific operating
instructions.
• Bore 10: for filling the lubricating oil
• Bore 11: for checking the lubricating oil level
• Bore 12: for draining the lubricating oil
1 Put the planetary gearbox out of service. Proceed as described in the
instructions of the machine or the overall vehicle.
2 Check the oil level as described in chapter 10.2.3 “Checking the oil level of the
planetary gearbox via the motor side”.
3 Place a catch basin with sufficient capacity under the planetary gearbox.
4 Loosen the screw plug of the bore 10 slowly, so that any existing pressure can
be released.
5 Remove afterwards the screw plugs from the bores 10 and 12.
6 Drain the lubricating oil completely in the catch tank.
7 Check visually whether e.g. water, metal particles or mud are in the drained
lubricating oil.
8 In case of important contamination, find out the cause before refilling. Contact
the Rexroth Service located in your area, for the address refer to appendix
A “Address directory” in the material number-specific operating instructions.
9 If the lubricating oil is contaminated, flush the lubricating oil system carefully
before filling the planetary gearbox with new lubricating oil.
10 Dispose of this drained lubricating oil in accordance with local country
regulations.
11 Check whether the seals on the screw plug threads of bore 10 and bore 12 are
still in perfect condition and can be reused. Replace the damaged seals.
12 Seal bore 10 and bore 12 with the corresponding screw plugs.
13 Then fill the planetary gearbox with clean lubricating oil according to the
selection list – industrial gear oils. Proceed as described in chapter 8.1.5
“Filling lubricating oil via the oil filler opening on the motor side”.
Procedure
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