PAD 3237245 - Caterpillar

Do not disassemble or tamper with the solenoid valve. Engine damage could result.
Unscrew solenoid valve (10) from the compression brake housing.
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Remove O-ring seals (11) from solenoid valve (10). Discard the O-ring seals.Note: The lower O-ring may stay in the bore in the compression brake housing. If this is the case, use a seal pick in order to remove the O-ring from the compression brake housing.
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Do not diassemble or tamper with slave piston adjusting screw. Engine damage could result.
Remove slave piston adjustment screw locknut (12) .
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Loosen slave piston adjustment screw (13) until the slave piston is fully retracted.
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Remove slave pistons carefully. The slave pistons are under spring pressure. Remove with care to avoid personal injury.
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.
Place Tooling (C) over slave piston adjustment screw (13). Turn the handle on Tooling (C) until spring retainer (14) is depressed approximately 1.0 mm (0.04 inch) in order to relieve the pressure from retaining ring (15) .
Remove retaining ring (15) with Tooling (A). Slowly back out the handle on Tooling (C) until the spring pressure ceases. Remove Tooling (C) .
Remove spring retainer (14), springs (16), and slave piston (17) .Note: Repeat Steps 9 through 13 for the remaining slave piston.
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Remove master pistons carefully. The master piston is under spring pressure. Remove with care to avoid personal injury.
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.
Apply downward pressure to retaining washer (19) with a punch of suitable size. Remove retaining ring (18) with Tooling (B) .
Slowly release the pressure from retaining washer (19) until the spring pressure ceases. Remove retaining washer (19), springs (20), and master piston (21) .Note: Repeat Steps 14 and 15 for the remaining master piston.