Team SILK SX28-72, Instruction Manual

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SX28-72 Flange Facing Machine
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4. Remove 2 off M6 cap head screws from the PTO box (power take off); the screws
located in the slots of the PTO box lid (see Fig. 25) and the 4 off M10 cap head
screws from the gearbox.
5. Firmly grip the gearbox in your right hand and with your left hand hold the PTO
box, ensuring the keeper plate is secured into the gearbox as this prevents the
output shaft from pulling out of the gearbox as it is eased away from the hub. Do
not allow the traverse direction selector to pull out of its position or this may result
in the spring loaded drive key being lost or displaced. Pull both assemblies away
from the mounting bracket. When the gearbox is clear of the mounting plate it
can be detached from the PTO box assembly.
6. Draw the gearbox assembly off the location dowels and clear of the input and
output support bushes.
7. Place in a clean safe location.
8. If the drive key becomes displaced it will be necessary to remove the selector
shaft and gears. To do this remove the black anodised handle and securing nuts,
remove the keeper plate and securing screw before withdrawing the shaft from
the gearbox (consult the gearbox drawing in parts list) and locate the drive key.
Inspect the springs and replace if any damage is visible.
To refit
To refit follow the removal procedure above in reverse. Do not forget the gear
selector shaft stop sleeve. When inserting the sub-assembly into the gearbox rotate
the gears on the shaft to allow them to mesh more easily. Refit the keeper plate and
securing screw.
Do not over tighten the M6 screws securing the PTO box.
7.4.2 Replacement of shearpins
To replace either shear pin follow the procedure:
1. Remove the gearbox as described in section 7.4.1. The shear pins will be found
in the worm shaft and in the output shaft.
2. To replace a broken shear pin in the worm shaft unscrew the three retaining
screws and remove the bearing cap.
3. Withdraw the worm shaft, drift out the broken pin and refit a new shear pin.
Ensure the broken sections of the original shear pin are removed from the
gearbox and check grease for contamination and foreign elements.
4. Align the pin in the worm shaft with the slot in the input gear collar and refit the
worm shaft. Ensure the worm shaft is correctly seated and refit the bearing cap.
5. To replace the shear pin in the output shaft remove the 'Feed Direction' black
anodised handle by removing the hex locking nut. Slide the output shaft with
gear out of the gearbox and drift out the broken pin as above.
6. Refit the gear and reassemble.
7. Check the action of all gear selections and shafts. Replace the gearbox and
recheck the operation.