85-10-30 Gearbox Oil Filter (Gearbox Rev. 70 or higher)
85-10-31 Removal of the Gearbox Oil Filter
If Gearbox is mounted on an “-B” or “-C” engine, the gearbox temperature sensor
(GBTS) is installed instead of the plug screw. Disconnect the GBTS prior conduction of
further work steps.
Removal of GBTS prior removal of the filter is recommended. Take care when
handling the GBTS.
Fig. 85 - 22 Plug screw [1] Fig. 85 - 23 Filter [2]
1. Remove the wire protection from the plug screw [1]
2. Open the plug screw [1]
3. Remove the filter [2] with screw (e.g. M8x50 or longer)
For 100h check: Check the filter (damage, debris) and clean it with Brake Cleaner.
Conduct a visual inspection of the used gearbox oil filter for contamination and metal
abrasion. If unusual contamination (metal shavings exceeding 1 mm; concentration of
particles; clogged filter) is found, the gearbox has to be exchanged.
For 300h change: Dispose the old filter and replace it with a new filter.