Technical specifications A) The contact of crown wheel and pinion must be located like in Fig. A
( mark obtained without load on bevel gears )
Use the shims in order to obtain the right contact.
Note : If the right contact is obtained, but the backlash is out of the
request range, move the crown wheel by adding or taking away shims.
The pinion movement, alteration the contact area.
The crown wheel movement, alteration the backlash.
The Ratio 1:1 does not follow the previous table, first adjust the teeth
contact and later move
both the gears in order to increase or decrease the backlash.
B) Gear backlash must be respect the following relation:
( 0.03 / 0.08 ) x module
( if module m=5 gear backlash must be 0.15 / 0.40 mm )
C) Tightening of bolts must be carried out making use of torque meter
wrench.
D) Insert oil seals taking care or greasing the zone of contact between oil
seal and shaft.
E) Gearbox operators with lubricating oil.
The type of oil recommended is : SAE 90EP
- Oil quantity upper gearbox 0.65 Litres and lower gearbox 1.8 Liters
First oil change is recommended after the first 50 hours of
work other change after 600 hours and / or once per year at
least.
The figure shown on LH side is how check the backlash.
4.6 Repair of swivel gearbox
50
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