FLYWHEEL ASSEMBLY 14" 2 plate 1W7787 - Caterpillar

3508 (95Y, 68Z),
3512 (1LM, 49Y, 65Z),
3516 (27Z, 71Z) Industrial;
3508 (6TJ),
3512 (2WK),
3516 (9KF) Locomotive;
3508 (96Y, 69Z),
3508 With EUI (3PS),
3508B (2BM, 7SM, 1TW),
3512 (50Y, 66Z),
3512 With EUI (3RS),
3512B (7HM, 4TN, 2GW),
3516 (29Z, 72Z),
3516 With EUI (3SS),
3516B (8CN, 8KN, 3CS) Marine;
3508 With EUI (3TS),
3508B (3DM, 3DW),
3512 With EUI (3WS),
3512B (8EM, 1PW),
3516 With EUI (3XS),
3516B (9AN, 2FW) Marine Auxiliary;
3508 (23Z, 70Z),
3508 With EUI (5XM, 3LS),
3508B (4GM, 6PN, 2HW),
3512 (24Z, 67Z),
3512 With EUI (6PM, 3MS),
3512B (8RM, 6WN, 4AW),
3516 (4XF, 5FJ, 25Z, 73Z),
3516 With EUI (7KM, 3NS),
3516B (6HN, 7RN, 1NW) Generator Set;
3508 (97Y),
3512 (51Y),
3516 (28Z) Vehicular EnginesReference: Engine News, October 1997, Page 2, "Improved Piston Crown Assembly Used In The Rod And Piston Group". Engine News, October 1997, Page 3, "New Piston Crown Improves Service Life". Engine News, May 1997, Page 6, "Improved Cylinder Liner Has Longer Service Life". Engine News, July 1996, Page 7, "New Oil Jet Tube Assemblies Replace Oil Cooling Jet Assemblies". Engine News, This Issue, "Piston And Piston Ring Reference Chart For 3500 And 3500B Enignes". Engine News, This Issue, "Causes Of Worn And Broken Piston Rings".Description of Change: The 3500B engines and 3500 engines with two piece pistons now use new piston rings.
Illustration 1.
Top Ring Wear(A) Ring Face Wear.(B) Top Flank Wear.(C) Piston Ring.(D) Bottom Flank Wear.(E) Piston Crown.(F) Liner Bore Wear.(G) Cylinder Liner.
Illustration 2.
Top Ring Face Change.(X) Former 8N-1233 Top Ring with Symmetrical Barrel Face.(Y) New 144-5694 Top Ring With Asymmetrical Barrel Face.The new top ring improvements include: * A new denser face coating.* A new asymemetrical face.* A different keystone angle.* A smaller end gap.
The new denser face coating decreases ring face wear [see Illustration 1, Item (A)]. This new denser face coating does not increase liner bore wear. The new asymmetrical face provides lower brake specifice oil consumption (see Illustration 2). The new keystone angle of the top ring provides better contact between the top ring and the piston top ring groove. This results in decreased bottom flank wear [see Illustration 1, Item (D)].
The new intermediate ring has a smaller end gap. When used together, the smaller end gap in the top and intermediate rings result in less blowby, lower crankcase pressure, and a decrease in top flank wear [see Illustration 1, Item (B)].
The new oil ring exerts 17 percent more force against the liner bore than the former oil ring. This results in slightly reduced oil consumption.
The new piston rings provide lower ring wear and lower piston ring groove wear. This will result in increased service life and help prevent broken top rings.
Adaptable To: The new 144-5694 Top Ring replaces the former 122-5956 Top Ring in 3500B engines. The new 144-5694 Top Ring replaces the 8N-1233 Top Ring in 3500 engines with two piece pistons. The 8N-1233 Top Ring