6 - Maintenance
81
€
DANGER! Brake dust can cause severe health injuries! Avoid inhalation of brake dust! Use respirator when servicing
the brakes. Do not clean brakes with compressed air! Use vacuum cleaner or rinse with water to avoid brake dust
being blown around.
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WARNING! The specified min. thickness is the absolute minimum which must never be exceeded. Renew the parts if
they would reach the above dimensions before next service inspection.
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WARNING! Renewal of brake linings or brake drums must be done both sides at the same time.
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ATTENTION! If the brake drum must be removed from the hub, a hydraulic press is required to press the wheel studs
out.
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WARNING! Do not get oil, grease or copper paste in contact with the brake linings and drums.
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ATTENTION! The shaft has a vertical and an horizontal cotter pin hole. Use the one first aligned with the notch when
loosening the castellated nut.
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WARNING! If you do not feel totally confident changing wheel bearings or brake shoes contact your HARDI dealers
workshop.
10. Remove the clevis pin between the air diaphragm cylinder and
brake cam lever.
11. Remove the cotterpin (G) and nut (F), the brake shoe anchor bolt
(H) and slide the brake shoes over the cam. Twist the pair of brake
shoes to remove the shoe return springs (I). Replace brake shoes if
the linings are worn.
12. Apply a small quantity of copper paste on moving parts and
assemble the brake shoes and shoe return springs again.
13. Fit the shoe assembly with the anchor bolt first. Then pull the
shoes away from each other and slide them over the cam
afterwards. Tighten the anchor bolt castellated nut again and fit a
new cotter pin.
14. Check roller bearings for discoloration and wear - renew if worn or
damaged.
15. Assemble the hub and bearings using a new sealing ring.
16. Fill the hub and bearings with fresh grease before fitting it to the shaft.
17. Fit the castellated nut. Rotate the hub and tighten the castellated nut until a slight rotation resistance is felt.
18. Loosen the castellated nut again until the first notch is aligned with the cotter pin hole in the shaft.
19. Fit a new cotter pin and bend it.
20. Fit the hub cap to the hub. Slightly tighten the 6 Allen bolts.
21. Adjust the brakes as described in “250 hours service”.
22. Fit the wheel again and tighten the wheel nuts. See section “50 hours service” regarding torque wrench setting.
Tighten all bolts to half the specified torque first, then to the full specified torque.
23. Tighten again after 10 hours of work. Check the torque every day until it is stabilized.
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