Hardi COMMANDER TWIN FORCE Instruction Book page 92

6 - Maintenance
7. Rinse the remaining parts on the brake carrier plate with water and dry them.
8. Remove roller bearings (E), clean all parts in degrease detergent and dry them.
9. Check the brake drum diameter and lining thickness - renew if worn.
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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.
ATTENTION! If the brake drum must be removed from the wheel hub, a hydraulic press is required to press the wheel
studs out.
10. Remove the clevis pin between the air diaphragm cylinder and
brake cam lever.
11. Remove the cotter pin (G) and castle 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 (I) again.
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WARNING! Do not get copper paste in contact with the brake
linings and drums.
13. Fit the shoe assembly with the anchor bolt (H) first. Then pull the
shoes away from each other and slide them over the cam
afterwards. Tighten the anchor bolt castle nut (F) again and fit a
new cotter pin (G).
14. Check roller bearings for discolouration and wear - renew if worn
or damaged.
15. Assemble drum (D) and bearings (E) using a new sealing ring (J).
16. Fill the hub and bearings with fresh grease before fitting it to the shaft.
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WARNING! Do not get oil or grease in contact with the brake linings and drums.
17. Fit the castle nut (C). Rotate the brake drum (D) and tighten the castle nut (C) until a slight rotation resistance is felt.
18. Loosen the castle nut (C) again until the first notch is aligned with the cotter pin hole in the shaft.
ATTENTION! The shaft has a vertical and an horizontal cotter pin hole. Use the one first aligned with the notch when
loosening the castle nut.
19. Fit a new cotter pin (B) and bend it.
20. Fit the hub cap (A) to the hub. Slightly tighten the 6 Allen bolts.
21. Adjust the brakes as described in "250 hours service - Brake adjustment (optional)" on page 90.
22. Fit the wheel again and tighten the wheel nuts. See "50 hours service - Wheel nuts" on page 87 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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