KIT-PISTON RING 3341997 - Caterpillar

ALL CATERPILLAR ENGINES (EXCEPT STARTING ENGINES)The new 5P2050 Checking Fixture can be used for taking accurate measurements of the relation between the pin bore and crankshaft bore on connecting rods. The fixture can be used for checking connecting rods after the pin boring operation, and for checking used rods for possible rebuilding.
5P2050 CONNECTING ROD CHECKING FIXTURE 1. 5P2050 CHECKING FIXTURE2. 5P2051 POSITION ARM3. 5P2052 CRANK MANDREL (4.00" TO 5.50") NOT SHOWN4. 5P2053 CRANK MANDREL (2.62" TO 4.00")5. PLUNGER EXTENSION (SEE APPLICATION CHART)6. PIN MANDREL (SEE APPLICATION CHART)Checking Center-To-Center Distance
(1) Use the chart on pages 9 and 10 to find the correct pin mandrel, crank mandrel, and plunger extension. Install pin mandrel (1), crank mandrel (2), plunger extension, and position arm (3) on the master or new connecting rod of known length. Put arm (3) in alignment with the centerline of pin mandrel (1), and tighten actuator (4) until the plunger extension and mandrel (2) are firm (solid resistance) against the connecting rod. (2) Put the master connecting rod into position on the checking fixture as shown. Loosen knob (5) and move indicator holder (6) until the dial indicators (7) show about .010" less than one revolution. (3) Put both dial indicators in the "zero" position by turning dial face (8). Remove the connecting rod from the fixture; turn the rod 180° horizontally and put it back in the checking fixture. (4) If the dial indicators are still in the "zero" position after turning the master rod 180°, the fixture is correctly calibrated. If there is a new reading on the dial indicators, turn dial face (8) of the indicators one-half of the difference between zero and the second reading (Example: If there are readings of + .001 and - .001, set dials to + .0005 and - .0005). Remove master rod (9) from the fixture. Remove the mandrels and position arm from the master rod. (5) If the connecting rod is being checked before being rebuilt, remove piston pin bearing (10) from the rod. Install the correct "bearing out" pin mandrel (1), crank mandrel (2), plunger extension, and position arm (3) as given in the Application Chart.(6) If the connecting rod is being checked after being rebuilt, install the correct "bearing in" pin mandrel (1), crank mandrel (2), plunger extension, and position arm (3). The pin bearing must be "cleaned up" (100% machined on the inside diameter) after the boring operation. (7) Put position arm (3) in alignment with the centerline of the pin mandrel (1), and tighten actuator (4) until mandrel (2) is firm (solid resistance) against the connecting rod. Put the connecting rod into position on the checking fixture as shown. (8) Make a record of the readings on the two dial indicators (7). Add the two readings and divide by two. The resulting average is the difference from the standard center-to-center distance. Refer to the chart on pages 9 and 10 for the maximum tolerances before and after rebuilding.EXAMPLE I: (+ .003