Usage:
768C (02X),
772B (64W),
776C (2TK),
784B (5RK) Tractors;
769C (01X, 1ED),
773B (5SC, 63W),
777C (4XJ),
785 (8GB),
785B (6HK),
789 (9ZC),
789B (7EK),
793 (3SJ),
793B (1HL) Trucks;
771C (3BJ),
775B (7XJ) Quarry Trucks
The horizontal wear limits for the ball studs used in the steering linkage are now available. The inspection for ball stud wear should be made every 1000 hours.
The "Planned Maintenance" horizontal wear limit for ball stud is 1.02 mm (.040 in). The "Out Of Service" limit is 1.27 mm (.050 in). The "Planned Maintenance" limit means that the ball stud should be replaced at the next regularly scheduled maintenance interval or when the machine is out of service for other repairs. The "Out Of Service" limit indicates that the ball stud must be replaced before the machine is put back into service.
Use the following method to measure horizontal ball stud wear.
Steering linkage measurement locations.
1. Attach the magnetic base of an 8T-5096 Dial Indicator Test Group to the link group (1) of the steering linkage so the horizontal movement of the ball stud can be measured.
NOTE: The horizontal wear limits on all ball studs, including those on the steering cylinders, in the steering linkage should be checked.
2. Place the indicator against the side of the steering arm (2) or center arm (3) depending on which ball stud is being inspected. Set the indicator dial to zero.
3. Turn the front wheels in both directions. Note the amount of horizontal play on the indicator dial.