CORE AS 2168642 - Caterpillar

Procedure to update existing lift cylinders on (S/N: BAR162-UP; 5TW1-UP)
Both lift cylinders must be reworked as the rod assembly in the new 303-4001 Hydraulic Cylinder Gp has a greater diameter.
Remove lift cylinders. Refer to Disassembly and Assembly, "Lift Cylinder - Remove".
Rework lift cylinders. Refer to Disassembly and Assembly, "Lift Cylinder - Disassemble and Assemble".
Install lift cylinders. Refer to Disassembly and Assembly, "Lift Cylinder - Install".Procedure to update existing lift cylinders on (S/N: GLK1-UP; JLK1-795)
Both lift cylinders must be reworked as the rod assembly in the new 303-4001 Hydraulic Cylinder Gp has a greater diameter.
Remove lift cylinders and rework. Refer to Disassembly and Assembly, "Lift Cylinder - Remove".
Install lift cylinders. Refer to Disassembly and Assembly, "Lift Cylinder - Install".303-4001 Hydraulic Cylinder Gp
Illustration 1 g01409427
Table 4
303-4001 Hydraulic Cylinder Gp    
Item     Qty     Part Number     Description     Item     Qty     Part Number     Description    
1     1     5M-6214     Pipe Plug (1/8" -27 NPT)     13     2     5M-0544     Bolt (1 1/8"UNC X 4 1/2")    
2     1     219-1159     Piston     14     8     3S-1349     Hard Washer (1 1/8")    
3     2     5S-7383     Bolt (3/8"UNC X 1 3/4")     15     1     206-7001     Ring-Wear    
4     2     8T-4896     Hard Washer (3/8")     16     1     206-6955     Seal As    
5     1     186-9711     Lift Cylinder As     17     1     303-3495     Ring    
6     1     5P-2235     O-Ring Seal     18     1     303-3492     Seal    
7     1     1V-7001     Sleeve Bearing     19     1     303-3491     Seal    
8     1     4J-8734     Locknut     20     1     303-3489     Seal    
9     1     141-8610     Plate     21     4     5S-7349     Bolt (1/4" UNC X 1/2")    
10     1     5P-8112     Grommet     22     4     6J-6478     Washer (1/4")    
11     1     288-1363     Cylinder Head     23     6     3N-1614     Bolt (1 1/8" UNC X 4")    
12     1     281-3694     Hydraulic Cylinder Rod As     -     1     302-9176     Seal Kit    Note: Install items (18), (19) and (20) as shown in Illustration 1.Note: Items marked (J) in Illustration 1 are part of 302-9176 Seal Kit .