Assembling Instructions

Assembling the GFA Module with Shaft Lid generation 1

For service tool, see Service Equipment for the specific GFA model.

To assemble the GFA module:

  1. Depending on the type of needle bearings, assembled with needle carrier (A) or loose pins (B), do the following:

    • A) Add grease to the needle carrier. Put the needle carrier over the shafts.

    • B) Add grease to the middle gears. Put the middle gears over the shafts.

  2. Depending on the type of needle bearings, assembled with needle carrier (A) or loose pins (B), do the following:

    • A) Add grease to the middle gears. Put the middle gears over the needle carriers.

    • B) Add grease to the needles. Insert the loose needles between the shafts and the middle gears. Make sure all the needles go in - there should be no gaps.

  3. Add grease to the output gear. Place the output gear in the housing. Position the gear with the same orientation (hexagonal shape pointing up or down), as when dismantling.

  4. Add grease to the input gear. Insert the input gear into the bearing housing and put back the snap ring, shim ring and needle carrier (if they were removed):

    • A) GFA system with fixed index or quick index adapter generation 1.

    • B) GFA system with fixed index or quick index adapter generation 2.

  5. Depending on the adapter type the bearing house can be prepared in one of the following ways, before inserted into the GFA housing:

    • A) GFA system with fixed index adapter generation 1:
      Insert the bearing housing into the upper locking ring, nut, and lower locking ring.

    • B) GFA system with quick index adapter generation 1:
      Insert the bearing housing into the upper locking ring, guide ring, and lower locking ring.

    • C) GFA system with fixed index or quick index adapter generation 2:
      Insert the bearing housing into the upper locking ring, guide ring, and lower locking ring.

    Locking rings are not used in all GFA models, refer to the spare parts list of the GFA model in question.

  6. Insert the bearing housing, prepared as in the step above, into the GFA module housing.

    The bearing housing can be inserted from the top or from below, depending on the GFA model.

  7. Use a press tool to press the upper and lower parts of the housing together.

    It is important to press evenly over the housing.

  8. Make sure there is no gap between the upper and lower part of the housing.

  9. Tighten the screws to the specified torque. The number and type of screws depend on the GFA model.

  10. If applicable, put the bearing support washer over the shaft lid. The bearing support is not available of all GFA models.

  11. Insert the shaft lid into the housing.

  12. Turn the GFA upside down, put it in a vice and tighten the shaft lid.

Assembling the GFA Module with Shaft Lid generation 2

For service tool, see Service Equipment for the specific GFA model.

To assemble the GFA module:

  1. Depending on the type of needle bearings, assembled with needle carrier (A) or loose pins (B), do the following:

    • A) Add grease to the needle carrier. Put the needle carrier over the shafts.

    • B) Add grease to the middle gears. Put the middle gears over the shafts.

  2. Depending on the type of needle bearings, assembled with needle carrier (A) or loose pins (B), do the following:

    • A) Add grease to the middle gears. Put the middle gears over the needle carriers.

    • B) Add grease to the needles. Insert the loose needles between the shafts and the middle gears. Make sure all the needles go in - there should be no gaps.

  3. Add grease to the output gear. Place the output gear in the housing. Position the gear with the same orientation (hexagonal shape pointing up or down), as when dismantling.

  4. Add grease to the input gear. Insert the input gear into the bearing housing and put back the snap ring, shim ring and needle carrier (if they were removed):

    • A) GFA system with fixed index or quick index adapter generation 1.

    • B) GFA system with fixed index or quick index adapter generation 2.

  5. Depending on the adapter type the bearing house can be prepared in one of the following ways, before inserted into the GFA housing:

    • A) GFA system with fixed index adapter generation 1:
      Insert the bearing housing into the upper locking ring, nut, and lower locking ring.

    • B) GFA system with quick index adapter generation 1:
      Insert the bearing housing into the upper locking ring, guide ring, and lower locking ring.

    • C) GFA system with fixed index or quick index adapter generation 2:
      Insert the bearing housing into the upper locking ring, guide ring, and lower locking ring.

    Locking rings are not used in all GFA models, refer to the spare parts list of the GFA model in question.

  6. Insert the bearing housing, prepared as in the step above, into the GFA module housing.

    The bearing housing can be inserted from the top or from below, depending on the GFA model.

  7. Use a press tool to press the upper and lower parts of the housing together.

    It is important to press evenly over the housing.

  8. Make sure there is no gap between the upper and lower part of the housing.

  9. Tighten the screws securing the upper housing to the specified torque. The number and type of screws depend on the GFA model.

  10. If applicable, put the bearing support washer over the shaft lid. The bearing support is not available for all GFA models.

  11. Turn the GFA module upside down. Insert the shaft lid into the housing. In the case that the GFA module has keys, check that the keys are in the correct position.

  12. Put the shaft lid plate onto the shaft lid, the shaft lid should fit into the hole in the middle. Use a pin spanner to make sure that the shaft lid plate is in the correct position.

  13. Tighten the screws securing the shaft lid plate to the specified torque.

Attaching a Fixed Index Adapter Generation 1 and 2

For service tool, see Service Equipment for the specific GFA model.

  1. Clean the threads of the drive unit and the adapter.

  2. Apply Loctite 2701, or similar, to the threads of the drive unit.

  3. Fasten the drive unit in a vice and tighten the adapter to specified torque.

  4. Attach the adapter to the nut.

  5. Tighten the nut with a C-spanner to specified torque.

Attaching a Fork Adapter

For service tool, see Service Equipment for the specific GFA model.

  1. Remove the bearing shell from the angle head of the tool.

  2. Attach the fork adapter to the angle head.

  3. Fasten the tool to a vice. Clean the threads. Apply Loctite 2701, or similar, to the bearing shell adapter, push it into the fork adapter and tighten to specified torque. Note: this is not the same bearing shell as the one for the angle head, in Step 1.

  4. Clean the threads. Apply Loctite 2701, or similar, to the threads of the adapter. Screw it onto the fork adapter and tighten to specified torque, using a C-spanner.

  5. Attach the nut with the GFA module to the adapter of the drive unit.

  6. Tighten the nut, using a C-spanner.

Attaching a Quick Index Adapter Generation 1 and 2

For service tool, see Service Equipment for the specific GFA model.

  1. Attach the adapter and ring to the GFA unit.

    Make sure the spring is inserted in the adapter before attaching the ring.

  2. Tighten the ring inside the adapter to specified torque.

  3. Fasten the drive unit to a vice. Clean the threads of the drive unit and the adapter.

  4. Apply Loctite 2701, or similar, to the threads of the drive unit.

  5. Attach the adapter to the drive unit and use a C-spanner to tighten the adapter to specified torque.

GFA-COT | Show Product Numbers

3513000942 3513000349 3513000876 3513000906 3513000905 3513000923 3513000881 3513000878 3513000877 3513000875 3513000874 3513000903 3513000891 3513000890 3513000347 3513000480 3513000375 3513000363 3513000856 3513000330 3513000863 3513000479 3513000361 3513000285 3513000469 3513000318 3513000317 3513000242 3513000152 3513000314 3513000327 3513000214 3513000213 3513000131 3513000223 3513000218 3513000198 3513000328 3513000261 3513000260 3513000268 3513000267 3513000266 3513000264 3513000263 3513000272 3513000271 3513000270 3513000269 3513000274 3513000273 3513000287 3513000286 3513000284 3513000283 3513000045 3513000043 3513000277 3513000276 3513000275 3513000303 3513000301 3513000300 3513000299 3513000298 3513000282 3513000281 3513000280 3513000279 3513000278 3513000292 3513000291 3513000290 3513000289 3513000288 3513000310 3513000309 3513000297 3513000296 3513000295 3513000294 3513000293 3513000308 3513000307 3513000306 3513000305 3513000304 3513000044 3513000329 3513000251 3513000250 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Published: 2025-06-19

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