1997/05/19 Caterpillar

Cylinder Rod For Suspension Cylinder Groups Has Larger Diameter Bolts For Piston Retention{7201}

Usage:

772 (10S, 11S, 80S) 772B (64W),
773 (63G) 773B (63W) 775B (7XJ) Trucks

Description of Change: A cylinder rod assembly using 12.7 mm (.50 in) diameter bolts and washers, retaining the piston, has replaced the former rod assembly using smaller 11.1 mm (.44 in) diameter bolts or studs.

Adaptable To: The 6E-1972 Rod Assembly replaces the 7J-3470 Rod Assembly (canceled). The 6E-1972 Rod Assembly requires ten 5J-5793 Bolts-12 Point Hard and ten 3V-3306 Washers-Hard.

The 6E-1972 Rod Assembly, 5J-5793 Bolts-12 Point, and 3V-3306 Washers-Hard are adaptable to 7J-3480 (Eng. Chgs. 00-Up), 9J-2016 (Eng. Chgs. 00-Up), and 1U-4777 (Eng. Chgs. 00-13) Suspension Cylinder Groups.

NOTE: The cylinder group part number, (Eng. Chg.) engineering change number, and date of manufacture are found on the cylinder group tag.

NOTE: Bolt holes, in earlier pistons, must be enlarged to give clearance for the larger bolts used with the 6E-1972 Rod Assembly. See Illustration 2.

Illustration 1. Typical suspension cylinder group
(1) 5J-5793 Bolt-12 Point. Tighten bolts to 130 ± 20 N·m (95 ± 15 lb ft). (2) 3V-3306 Washer-Hard.

Machining dimensions. (A) 70.54 mm (2.777 in). (B) 43.59 mm (1.716 in). (C) 22.92 mm (.902 in). (D) 60.00 mm (2.362 in). (E) 74.17 mm (2.920 in). (F) 148.34 mm (5.840 in) dia. (Ref). (G) 14.50 mm (.5708 in) dia.

Caterpillar Information System:

1997/05/19 Improved Crankcase Breather Group Is Available{1317}

1997/05/19 Improved Components For Air Lines Groups{1058,1063}

1997/05/19 New Engine Software Available For 3412E Engines In 24H Motor Graders{1920}

1997/05/12 New Cylinder Groups Use Piston For Internal Stop {7562,5101,5102,5104}

1997/05/12 Structural Improvement To Piston Permits Removal Of Piston Coatings {1214}

1997/05/12 Correction To 50 Hour Machine Lubrication Schedule {7521,6437,6451,6452}

1997/05/12 Dimensions To Produce Drive Shaft Sleeve {3253,3267}

1997/05/12 New Turbocharger Guard Now Used {1073}

1997/05/12 New Center Arms, Steering Arms And Lock Plates Used In Steering Linkage Groups To Improve Linkage Quality {4305,4300}

1997/05/12 Fabricated Rear Cross Tube Replaced With Casting To Improve Service Life {3268}

1997/05/12 New Engine Wiring Harnesses Allow Easier Engine Removal And Installation {1408}

1997/05/12 Improved Lever Assembly Allows Greater Clearance {5112,7117}

1997/05/19 Improvements Made To Prevent Alternator Terminal Breakage{1405}

1997/05/19 Dimensions For Installing Attachment Tailgate Mounting Hardware On Articulated Truck Dump Bodies{7271,7258}

1997/05/19 Torques For Wheel Nuts And Bolts Are Incorrect In The Operation And Maintenance Manual{4201,4202}

1997/05/19 Installation Of Transmission Oil Distributor Sleeves{5208,3002,3159,3176}

1997/05/19 Improved Speed Sensor Group Used{1907}

1997/05/19 New Electronic Transmission Control Group Used{3032,3100}

1997/05/19 New Differential Pinion Bearing Setting Tool And Procedure Available{3258}

1997/05/19 Torque Specified For Piston Rod Nut In Steering Cylinder Group{4303}

1997/05/19 New Antirotation Bearing Pins And Bearing Lubrication Lines Used On Rear Suspension Cylinder Bearings To Increase Service Life{7218,7213,7201,7200}

1997/05/19 Backup Alarms Improved{7406}

1997/05/26 Foam Filled Oil Saver Tanks Used In Off-Highway Truck Rear Axle Groups To Increase Bearing Life{3260}

1997/05/26 New Brake Group Available For Thicker Front Wheel Casting{4006,4251,4201}