BEARING 1P6916 - Caterpillar

Procedure A: Linkage Calibration
1. Verify that the levers on actuator and fuel control linkage are the correct length.2. Inspect the rod ends. Rod end replacement should be made when side to side movement of ball (due to wear) will let ball face become flush with body sides.
ROD END3. Install levers to actuator and fuel linkage at the correct angle. Fuel linkage must not bind at any position in travel range.4. Make adjustment of linkage to fit levers. Verify that linkage will now move to shutoff and maximum fuel positions.5. Run the engine at the highest notch position with the generator unloaded and measure the actuator amperage. All vertically mounted actuators should have 50 ma under no load conditions; all horizontally mounted actuators have 81 ma under no load conditions (except 3500 Engines). The 3500 Engine horizontally mounted actuator should have 50 ma under no load conditions. Make an adjustment of the linkage from the actuator to the fuel system to get this operating position. Make linkage connecting rod longer or shorter by 1/2 turn adjustments until correct actuator amperage is available. Actuators that can not operate at the amperage specified may not permit maximum fuel position for highly rated engines. These actuators should be returned to the factory for recalibration. See Service Manual for a specific engine or see Special Instruction SMHS7188 for the correct linkage geometry (lengths and angles).Procedure B: Actuator Check Procedure
InstallationWhen actuator is mounted on the engine, be sure that correct alignment is made with the engine fuel linkage.A gasket should be placed between the actuator and the base mounting pad. For vertically mounted actuators, be careful to not block the drain hole(s) next to the centering pilot of the base (see Figures 1 and 2). The oil that drains through drive shaft bore must flow freely to the sump. The splined drive shaft must fit into the drive with a free, slip fit; no tightness is permitted. The vertically mounted actuator must drop onto the mounting pad of its own weight without applying force.The actuator gets its oil supply from a sump in the mounting base. The engine overflows the sump (from the engine lube circuit) through an orifice that meters flow. The sump can be checked for fill level with the actuator removed. Cranking the engine will not make any oil flow at the actuator oil supply port. The actuator base gasket must not permit air leakage into the supply port.The engine fuel linkage must be free of binding and without backlash. If there is a collapsible member (permits compression) on the linkage, be sure the spring does not yield each time the actuator moves the linkage rapidly.
Fig. 1 EG-10P ACTUATORActuator Troubleshooting
1. The Locomotive Governor Control must produce voltage at the lead terminals for actuator during engine cranking and operation. This voltage should be more than 4 volts during cranking. If correct voltage is present and actuator shaft does not have movement, stop the engine and disconnect actuator leads. Check the resistance leads.