PUMP GP-MAIN HYDRAULIC 3841109 - Caterpillar

Illustration 1 g01971914 (1) Torque for two plug assemblies ... 50 7 N m (37 5 lb ft) (2) Torque for the bolt ... 3100 350 N m (2286 258 lb ft)Note: Before assembly, lubricate the threads of the head with clean grease. (3) Torque for the head ... 600 130 N m (443 96 lb ft) (4) Lubricate the sealing lip of the buffer seal assembly lightly with the lubricant that is being sealed. (5) Lubricate the sealing lip of the U-cup seal lightly with the lubricant that is being sealed. (6) Lubricate the sealing lip of the wiper seal lightly with the lubricant that is being sealed. (7) Apply Loctite Retaining Compound 609 Adhesive to the wiper seal groove before assembly. (A) Outside diameter of the piston over two lands ... 88.40 0.03 mm (3.480 0.001 inch) (B) Bore of the cylinder assembly ... 88.90 0.08 mm (3.500 0.003 inch) (C) Diameter of the rod ... 63.450 0.038 mm (2.4980 0.0015 inch) (D) Bore of the head over four lands ... 63.78 0.05 mm (2.511 0.002 inch)