Hydraulic cylinder Tie Rod Design - imperial - Duncan Rogers

INSTALLATION AND MAINTENANCERod Gland Retainer(or Rod Gland)Screw Torque InformationScrew Torque in Foot PoundsBore Size1 1 /8"1 1 /2"2"2 1 /2"3 1 /4"4"5"6"7"8"10"10"12"12"14"14"Piston Road Diameter5/8"ALLALLALLALLALLALLALLALLALL4 1 /2", 5" & 5 1 /2"Tie Rod Torque Information7"5 1 /2" & 7"8"7"10"Tie Rod 1 1 /8" Through 6" BoresBore1 1 /8"1 1 /2"2"2 1 /2"Torque in Foot Pounds8305050Tie Rod Torque for 7" Bore and LargerColumn 1Turn (T) in 12ths123456789101112“L” Length2 3 /45 5 /88 1 /211 1 /41416 3 /419 5 /822 1 /225 1 /42830 3 /433 5 /8Hex Head Set ScrewBore3 1 /4"4"5"6"One Full Turnplus T “L” Length36 1 /239 1 /442 1 /244 3 /447 5 /850 1 /253 1 /45658 3 /461 5 /864 1 /267 1 /413.6333366Two Full Turnsplus T “L” Length7072 3 /475 5 /878 1 /281 1 /48486 3 /489 5 /892 1 /295 1 /498100 3 /4Socket Head Cap Screw7.73.67.77.77.73333333939953995Torque in Foot Pounds110130325480Three Full Turnsplus T “L” Length103 5 /8106 1 /2109 1 /4112114 3 /4117 5 /8120 1 /2123 1 /4126128 3 /4131 5 /8134 1 /2Large Bore CylindersFor 7" bore cylinders and larger, the tierods are given an initial torque, and thetie rod nuts are turned a calculatedamount. First torque all 4 tie rod nuts to200-250 foot pounds. Measure thecylinder to obtain length "L" as shown inthe illustration. Scribe a line on thecylinder head at one point of each hexnut and a matching mark on the hex nutpoint. Using the derived "L" consult thechart for the proper number of turns orfractions (in 12ths). The figures in Column1 shown in 12ths corresponds to thepoints and flats of the hex nut (seeillustration).All 7" bore cylinders and larger are nowfitted with hardened steel washers underthe tie rod nuts in order that thesecondary torque can be applied withoutheating, using an impact power wrenchor a slogging type ring spanner.34