WINDOW GP-DOOR 1641074 - Caterpillar

src="//c1.a2109.com/cat2/se/senr/senr6482b00055.png">
Articulating Piston Group ShownMake reference to Guideline For Reusable Parts, Pistons, Form No. SEBF8049, and Guideline For Reusable Parts, Piston Pins And Retaining Rings, Form No. SEBF8051.Top And Intermediate Ring
The 1U6431 Keystone Piston Ring Groove Gauge is necessary for measuring ring grooves in keystone style pistons. For correct use of the gauge group, refer to SEES5678 Instruction Card that is with the gauge group.Install piston rings with "UP" side toward top of piston.(1) Top ring has the mark "UP-1".(2) Intermediate ring has the mark "UP-2".Clearance between ends of piston ring when installed in a cylinder liner with a bore size of 137.16 mm (5.400 in)Top ring ... 0.724 0.190 mm (.0285 .0075 in)Intermediate ring ... 1.080 0.190 mm (.0425 .0075 in)Increase in clearance between ends of piston rings for each 0.03 mm (.001 in) increase in cylinder liner bore size ... 0.08 mm (.003 in)Oil Control Ring
Due to various horsepower ratings and compression ratios the oil control rings specifications will vary with each piston group.(3) Install oil control ring with the gap in the spring 180 degrees away from the gap in the ring.The 5P3519 Piston Ring Groove Gauge is available for checking ring grooves with straight sides. For instructions on the use of the gauge, refer to Guideline For Reusable Parts, Pistons, Form No. SEBF8049.Width of groove in piston for piston ring (new): 7E4367 Piston, 15.2 Compression ratio ... 3.210 0.010 mm (.1264 .0004 in)9Y7212 Piston, 15.6 Compression ratio ... 3.188 0.013 mm (.1255 .0005 in)7E6262 Piston Crown (articulating piston) 13.0 Compression ratio ... 3.210 0.010 mm (.1264 .0004 in)Thickness of piston ring (new) ... 3.137 0.013 mm (.1235 .0005 in)Clearance between groove and piston ring (new): 9Y7212 Piston ... 0.051 0.025 mm (.0020 .0010 in)7E4367 Piston and 7E6262 Piston Crown ... 0.073 0.025 mm (.0029 .0010 in)Maximum permissible clearance (worn) ... 0.15 mm (.006 in)Clearance between ends of piston ring when installed in a cylinder liner with a bore size of 137.16 mm (5.400 in) ... 0.572 0.191 mm (.0225 .0075 in)Increase in clearance between ends of piston ring for each 0.03 mm (.001 in) increase in cylinder liner bore size ... 0.08 mm (.003 in)Piston Pin Bore
(4) This piston has an elliptical (not round) pin bore. Measure the pin bore only in the vertical direction: 7E4367 Piston ... 50.82, 0.00 to +0.15 mm (2.001, .000 +.006 in)9Y7212 Piston and 7E5843 Skirt (articulating) ... 50.808, 0.000 to +0.500 mm (2.0003, .0000 +.0197 in)(5) Pin diameter ... 50.795 0.005 mm (1.9998 .0002 in)