6 - Maintenance
62
IMPORTANT! The shaft has a vertical hole and a horizontal hole for the pin. Use the first hole that aligns with the notch
when you loosen the shaft nut.
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WARNING! If you do not feel sufficiently competent to carry out these operations, contact your HARDI dealer.
10. Remove the pin between the air diaphragm cylinder and the cam
shaft.
11. Remove key (G), nut (F) and fixing bolt (H) from the brake shoe and
slide the shoe over the cam. Twist the pair of shoes to remove the
return springs (I). Replace the shoes if the linings are worn.
12. Apply a small quantity of copper paste to the moving parts and
re-fit the shoes and return springs.
13. Re-fit the shoes with the fixing bolt. Then separate the shoes and
slide them over the cam. Tighten the locknut on the fixing bolt and
insert a new key.
14. Check for wear and discolouration of the ball bearings; replace
them if they are in poor condition.
15. Fit the hub and bearings using a new gasket.
16. Grease the hub and bearings before fitting them on the shaft.
17. Fit the shaft nut. Turn the hub and tighten the nut until slight
resistance is felt.
18. Loosen the shaft nut until the first notch is aligned with the hole for the pin in the shaft.
19. Insert a new pin and bend it.
20. Replace the hub cap. Slightly tighten the six Allen screws.
21. Adjust the brakes as indicated in "Every 250 hours".
22. Re-fit the wheel and tighten the nuts. See "Every 50 hours" for the tightening torques and order. Start by tightening all
the bolts to half the indicated torque and then to the full torque.
23. Tighten again after ten hours of use. Check the torque every day until it stabilises.
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