SEAL-O-RING 1259701 - Caterpillar

Assembly Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
B     1U-5429     Snap Ring Pliers     1    
C     1P-0510     Driver Group     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01207856
If replacement of relief valve plug (22) is necessary, adjust screw (27) in order to obtain Dimension (X). Dimension (X) is 4.30 mm (0.169 inch). Tighten locknut (28) and then recheck Dimension (X) .
Install plug (29) .
Illustration 2 g01207712
Improper assembly of parts that are spring loaded can cause bodily injury.To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Install new O-ring seals on relief valve plug (22) and plug (21) .
Install plug (21) into rear housing (23) .Note: Be sure to install the relief valve in the original location.
Install valve (24) into rear housing (23) .
Install spring (25), guide (26), and relief valve plug (22) into rear housing (23) .
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Apply a light coat of clean engine oil to shaft assembly (19) and shaft assembly (20). Install the shaft assemblies into the rear housing.Note: In the steps that follow, ensure that the components are kept in alignment. This should be done by using the mark that was made before disassembly.
Illustration 4 g01207706
Install new O-ring seals on gear cases (17). Apply clean engine oil to the O-ring seals in order to hold the O-ring seals in position.
Install gear cases (17) on the rear housing.
Install dowels (18) .
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Install check valves (15) in middle housing (13) .
Install a new O-ring seal (14) in middle housing (13). Apply clean engine oil to the O-ring seal in order to hold the O-ring seal in place.
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Place middle housing (13) on the dowels and install middle housing (13) until middle housing (13) sits against the gear case.
Use Tooling (B) in order to install retaining ring (12) .
Install dowels (11) .
Illustration 7 g01208271
Improper assembly of parts that are spring loaded can cause bodily injury.To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Note: Do not touch the sealing surfaces of the carbon face seal. This may cause contamination by abrasive particles.
Install spring holder (32) and spring (31) on the shaft assembly.Note: Install carbon seal (30) immediately after applying oil to the rubber bellows. Oil causes the rubber bellows to expand.
Apply a light coat of clean engine oil to the rubber bellows of carbon seal (30) .
Hold the outside of carbon seal (30) and place carbon seal (30) on the shaft assembly against spring (31). Seal seat (7) will be installed later in the front housing.
Illustration 8 g01208283
Illustration 9 g01207717
Illustration 10 g00622447
Use Tooling (C) in order to install lip seal (9) in front housing (5). Install lip seal (9) with the lip that is spring loaded toward the bearing. Install O-ring seal (8) in front housing (5) .Note: There are two lip seals that are available for lip seal (9). One lip seal is for distillate fuel and the other lip seal