CROWN AS-PISTON 1753671 - Caterpillar

(5RK) Tractors;
785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL),
793C (4AR) Off-Highway TrucksDescription of Change: Assembly strength between differential and differential housing will be improved with longer studs or bolts and spacers. Replace the former studs or bolts with longer studs or bolts and spacers in certain mounting groups.Adaptable To: The 5P-6603 Stud and 108-0961 Spacer directly replace the former 4D-6578 Stud. The 5P-6603 Stud and 108-0961 Spacer are effective with 784B (5RK26) Tractors; 785B (6HK862), 789B (7EK670) Off-Highway Trucks and are adaptable to 784B (5RK) Tractors; 785 (8GB), 785B (6HK), 789 (9ZC), 789B (7EK) Off-Highway Trucks. The 6V-9667 Bolt and 108-0961 Spacer directly replace the former 6V-3532 Bolt. The 6V-9667 Bolt and 108-0961 Spacer are effective with 793C (4AR70) Off-Highway Trucks and are adaptable to 793 (3SJ), 793B (1HL), 793C (4AR) Off-Highway Trucks.
On 784B (5RK) Tractors and 785 (8GB), 785B (6HK) Off-Highway Trucks use one 4D-6578 stud without a spacer in location over differential carrier oil port. On 789 (9ZC) and 789B (7EK) Off-Highway Trucks use two 4D-6578 studs without spacers in locations over differential carrier oil port and lube line.