0437633 JOHNSON CARBURETOR ASSEMBLY

Illustration 1 g00993011
Typical example
(1) Oil seal (2) Ring assembly (3) Ceramic ring and rubber seal (4) Seal assembly (5) Spring Follow these recommendations for installation of the seals:Note: The seal installation tool is part of the replacement seal assembly.
Install ring assembly (2) and oil seal (1) into the pump housing. Install the oil seal dry. Do not lubricate the sealing lip. Use the correct installation tool and use a slow, even motion to press the seal into the pump housing.
Install shaft (6) through the oil seal.
Install the shaft's thrust washer (7).
Lubricate the outside diameter of the ceramic ring and rubber seal (3) with clean water.
Orient the polished face of the ceramic ring toward seal assembly (4). Use the installation tool and hand pressure to seat the ceramic ring and the rubber seal into the pump housing.
Remove spring (5) from the seal assembly. Lubricate the inside diameter of the seal assembly with clean water.
Use the seal installation tool and hand pressure to install the seal assembly onto the shaft until the face of the seal assembly makes light contact with the face of the ceramic ring and rubber seal.
Install the spring onto the seal assembly. (6) Shaft Width of shaft's groove for thrust washer ... 8.75 0.05 mm (0.345 0.002 inch) (7) Thrust washer Thickness ... 8.50 0.05 mm (0.3346 0.0020 inch) (8) Nut Torque ... 200 25 N m (150 18 lb ft) (9) Stud Torque ... 35 5 N m (26 4 lb ft) (10) Nut Torque ... 27 4 N m (20 3 lb ft) (11) O-ring seal Lubricate the O-ring seal with clean engine oil. (12) O-ring seal Lubricate the O-ring seal with clean engine coolant. (13) O-ring seal Lubricate the O-ring seal with glycerin. (14) Adapter Torque ... 100 10 N m (75 7 lb ft)Maximum leakage per minute for the water seal at 138 kPa (20 psi) of air pressure ... 20 cc (1.22 cu in)Maximum leakage per minute for the oil seal at 138 kPa (20 psi) of air pressure ... 24 cc (1.46 cu in)Type 2
Illustration 2 g01026565
Typical example
(1) Oil seal (2) Ring assembly (3) Ceramic ring and rubber seal (4) Seal assembly (5) Spring (6) Shaft Shaft's outer diameter for impeller ... 25.400 0.013 mm (1.0000 0.0005 inch)Width of shaft's groove for thrust washer ... 8.75 0.05 mm (0.345 0.002 inch) (7) Thrust washer Thickness ... 8.50 0.05 mm (0.3346 0.0020 inch) (8) Impeller Diameter of impeller's bore ... 25.342 0.013 mm (0.9977 0.0005 inch) (9) O-ring seal (10) O-ring seal (11) Stud Torque ... 35 5 N m (26 4 lb ft) (12) Nut Torque ... 27 4 N m (20 3 lb ft) (13) O-ring seal (14) Adapter Torque ... 100 10 N m (75 7 lb ft)Assembly Procedure
Follow this procedure for assembly:Note: The seal installation tool is part of the replacement seal assembly.
Install ring assembly (2) and oil seal (1) into the pump housing. Install the oil seal dry. Do not lubricate the sealing lip. Use the correct installation tool and use a slow, even motion to press the seal into the pump housing.
Install shaft (6) through the oil seal and through the ring assembly.
Install thrust washer (7).
Lubricate the outside diameter of the ceramic ring and rubber seal (3) with clean water or with 207-1600 Rubber Lubricant.
Orient the polished face of the ceramic ring toward seal assembly (4). Use the installation tool and hand pressure to seat the ceramic ring and the rubber seal into the pump housing.
Remove spring (5) from the seal assembly. Lubricate the inside diameter of the seal assembly with clean water or with 207-1600 Rubber Lubricant.
Use the seal installation tool and hand pressure to install the seal assembly onto the shaft until the face of the seal assembly makes light contact with the face of the ceramic ring and rubber seal.
Install the spring onto the seal assembly.
Lubricate the shaft with clean engine oil. Place the shaft onto a fixture that will absorb the load and press impeller (8) onto the shaft until the face of the impeller is flush with the face of the shaft.
Lubricate the bore for O-ring seal (9) with clean engine oil.
Lubricate the bore for O-ring seal (10) with clean engine coolant.
Tighten studs (11) according to the specified torque.
Tighten nuts (12) according to the specified torque.
Lubricate the bore for O-ring seal (13) with glycerin.
Tighten adapter (14) according to the specified torque. Maximum leakage per minute for the water seal at 138 kPa (20 psi) of air pressure ... 20 cc (1.22 cu in)Maximum leakage per minute for the oil seal at 138 kPa (20 psi) of air pressure ... 24 cc (1.46 cu in)