PIN-CYLINDER 4646137 - Caterpillar

Remove nut (5). Remove diaphragm assembly (3) from regulator body (4).
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Remove plate (6) from regulator body (4).
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Remove adapter ring (7) and the O-ring seal.
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Remove two screws (9). Remove valve assembly (8) and O-ring seal (10).
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Remove self-locking nut (10) from valve assembly (8).
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Remove metal washer (13), plastic washer (12), and valve disc (11) from valve assembly (8). If necessary, remove the seal from valve disc (11).
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Remove valve (14) from valve assembly (8).
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Remove spring washer (15) and O-ring seal (16) from valve (14).
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Remove dowel pin (17) from shaft (18) and remove shaft (18) from valve assembly (8).
Remove retaining ring (19) from shaft (18).
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Remove shaft (20) from valve assembly (8).
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Remove rubber diaphragm (21) and washer (22) from shaft (20).
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Remove plastic bushing (23) from valve assembly (8).
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Remove spring (25) from regulator body (4).
Remove three screws (24) and diaphragm assembly (26).
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Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Diaphragm assembly (26) consists of spring (28), spring seat (29), retainer (30), spring seat (31), spring (32), and shaft (33).