CONTROL GP-JOYSTICK 3428944 - Caterpillar

Illustration 1 g02594836
Table 1
Specification for 253-3066 Piston and Rod Gp
Item Qty Part Specification Description
This piston has a Keystone top ring. This piston also has Keystone intermediate rings. The 204-8041 Piston Ring Groove Gauge Gp is necessary for measuring the ring grooves in the Keystone pistons. For correct use of the gauge group, refer to the instruction card that is with the gauge group.
Before assembly of the rings, lubricate the ring grooves with clean engine oil. After assembly, lubricate the mating surfaces of the rings to the cylinder liner with clean engine oil.
1 1 172-0919 Crown As Bore in the bushing for new piston pin is 70.0525 0.0075 mm (2.75796 0.00029 inch).
Measure the pin bore in the bushings in two places for each bushing in a vertical direction.
2 1 155-5271 Piston Skirt Bore in the piston skirt for new piston pin is 69.988 0.005 mm (2.7554 0.0002 inch).
Measure the pin bore in a vertical direction.
3 1 229-1632 Top Piston Ring Install the piston ring with the "Up-1" side toward the top of the piston. The top piston ring must be installed with the yellow colored stripe to the right of the ring end gap.
When the piston ring is installed in a cylinder liner with a bore size of 170 mm (6.7 inch), the clearance between