COVER 4646873 - Caterpillar

Use Tooling (C) in order to remove ring (37). Remove bearing (36) from gear case (7).
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Illustration 18 g00539092Note: Later air starting motors will not have bumper (38) and backup ring (39).
Remove bumper (38) and backup ring (39) from drive housing (6).
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Remove seat (40) and bearing (41) from drive housing (6).
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Remove seal (42) from drive housing (6).
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Mark the position of cover assembly (2) in relation to motor housing (3) for assembly. Remove the cover assembly and the O-ring seal from the motor housing.
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Remove bolt (44) in order to remove rotor pinion (43) from the rotor shaft.
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Loosen bolt (46). Remove nut (45) from the rotor shaft.
Remove bearing (47) from end plate (48).
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Remove O-ring seal (49) and end plate (48) from the end of the rotor.
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Remove vanes (50) from rotor (51).
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Remove rotor (51) from motor housing (3).
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Use a suitable press in order to remove bearing (52) and end plate (53) from rotor (51).
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Remove bearing (52) from end plate (53).
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Remove washers (54) from end plate (53).
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Remove O-ring seals (55) from cylinder (56).
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Remove cylinder (56) from motor housing (3). Remove the remainder of the O-ring seals from the cylinder.