SEAL 4M9780 - Caterpillar

Illustration 9 g03731450
Press down piston (10). Remove pin (12) from guide (11).
Illustration 10 g03731396
Illustration 11 g02152508
Use Tooling (C) and a suitable lifting device in order to remove piston (10). The weight of piston (10) is approximately 98 kg (215 lb).
Remove seal rings (13) and seal rings (14) from piston (10).
Illustration 12 g02152511
Possible injury can result from spring force released when removing the nuts.Spring force will be released when the nuts and the brake anchor are removed.Loosen the nuts evenly, one turn at a time in order to release the spring force.
Loosen nuts (15) by one-half turn at a time until the spring tension has been released.
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Attach Tooling (C) and a suitable lifting device onto housing (16). Continue loosening nuts (15) until the nuts until housing (16) can be removed. The weight of housing (16) is approximately 57 kg (126 lb).
Remove seal rings (17) and seal rings (18) from the housing (16).
Remove nuts (15).
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Use Tooling (C) and a suitable lifting device in order to remove piston (19). The weight of piston (19) is approximately 121 kg (267 lb).
Remove D-ring seal (20) from piston (19).
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Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
Use Tooling (F) in order to compress guide spring (21). Remove Tooling (E), guide (11), and guide spring (21). Repeat this step for the remaining Tooling (E), guides (11), and guide springs (21).
Illustration 19 g02152549Note: Note the location of the springs that are marked with an X.
Remove inner springs (22) and outer springs (23) from brake anchor (24).
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Remove O-ring seals (25).
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Remove studs (26) and studs (27), if necessary.