3500B Locomotive Engines Caterpillar

Illustration 1	g01427300

(1) 101-1180 Spring

Quantity ... 4

Length under test force ... 57.36 mm (2.258 inch)

Test force ... 450 ± 23 N (101.2 ± 5.1 lb)

Free length after test ... 70.55 mm (2.778 inch)

Outside diameter ... 43.66 mm (1.719 inch)

(2) 101-1177 Spring

Quantity ... 4

Length under test force ... 46.49 mm (1.830 inch)

Test force ... 133 ± 7 N (30.0 ± 1.6 lb)

Free length after test ... 55.54 mm (2.187 inch)

Outside diameter ... 28.68 mm (1.129 inch)

Note: Coat the inlet valve stems and the exhaust valve stems with clean engine oil prior to installation into the cylinder head.

(A) Dimensions for the valves

Diameter of the new valves ... 9.441 ± 0.008 mm (0.3717 ± 0.0003 inch)

Bore in intake and exhaust valve guides after installation of valve guides into cylinder head assembly ... 9.487 ± 0.025 mm (0.3735 ± 0.0010 inch)

(B) Height from the top of the cylinder head to the top of the valve guides ... 26.0 ± 2.0 mm (1.02 ± 0.08 inch)

(C) Valve face angle ... 29.50 ± 0.25 degrees

(D) Outside diameter of the valve heads ... 56.00 ± 0.15 mm (2.205 ± 0.006 inch)

Illustration 2	g01623783

(E) Depth of counterbore for valve seat inserts ... 16.00 ± 0.15 mm (0.630 ± 0.006 inch)

(F) Angle of the face of the valve seat insert ... 30.25 ± 0.25 degrees

Note: For installation, reduce the temperature of the valve seat inserts to −20 °C (−4 °F). Apply 4C-9506 Retaining Compound to the outside diameter of the valve seat inserts and install the valve seat inserts. Do not hammer the valve seat inserts.

(G) Dimensions for the valve seat inserts

Diameter of counterbore for inlet valve seat inserts ... 60.508 ± 0.025 mm (2.3822 ± 0.0010 inch)

Diameter of counterbore for exhaust valve seat inserts ... 60.000 ± 0.025 mm (2.3622 ± 0.0010 inch)

Outside diameter of inlet valve seat inserts ... 60.119 ± 0.015 mm (2.3669 ± 0.0006 inch)

Outside diameter of Exhaust valve seat inserts ... 60.627 ± 0.015 mm (2.3869 ± 0.0006 inch)