BALL BEARING 3D0053 - Caterpillar

(1) Height to top of valve guides ... 26.00 2.00 mm (1.024 .079 in.)(2) 7N1904 Spring (outer) for valve: Length under test force ... 56.36 mm (2.219 in.)Test force ... 254 25 N (56.9 5.6 lb.)Use again minimum load at length under test force ... 229 N (51.5 lb.)Length of spring at valve open position ... 40.36 mm (1.589 in.)Use again minimum load at valve open position ... 800 N (180 lb.)Free length after test ... 62.50 mm (2.461 in.)Outside diameter ... 43.96 mm (1.731 in.)Spring must not be bent more than ... 2.18 mm (.086 in.)(3) 7N1903 Spring (inner) for valve: Length under test force ... 45.49 mm (1.791 in.)Test force ... 125 12 N (28 2.7 lb.)Use again minimum load at length under test force ... 113 N (25.4 lb.)Length of spring at valve open position ... 29.49 mm (1.161 in.)Use again minimum load at valve open position ... 397 N (89.3 lb.)Free length after test ... 51.54 mm (2.029 in.)Outside diameter ... 29.24 mm (1.151 in.)Spring must not be bent more than ... 1.83 mm (.072 in.)(4) Diameter of valve stems (new) ... 9.441 0.008 mm (.3717 .0003 in.) Bore in valve guides with guides installed in the head (new) ... 9.487 0.025 mm (.3735 .0010 in.)Use again maximum bore in valve guides with guides installed in the head ... 9.540 mm (.3755 in.)(5) Diameter of valve heads ... 56.00 0.15 mm (2.205 .006 in.)(6) Angle of valve faces ... 29 1/4 1/4° (7) Depth of bore in head for valve seat inserts ... 14.00 0.15 mm (.551 .006 in.)(8) Diameter of valve seat inserts ... 60.119 0.015 mm (2.3669 .0006 in.) Bore in head for valve seat inserts ... 60.000 0.025 mm (2.3622 .0010 in.)(9) Angle of face of valve seat inserts ... 30 1/4 1/2°(10) Outside diameter of the face of the valve seat inserts ... 55.14 1.48 mm (2.171 .058 in.)Procedure To Check Intake Valve Timing:
1. Check the No. 1 intake valve clearance with the engine stopped. The valve clearance must be 0.30 to 0.46 mm (.012 to .018 in.). If the valve clearance is not in this range, adjust the clearance to 0.38 mm (.015 in.).2. Mark top center position of the crankshaft on the vibration damper or pulley.3. Use a dial indicator to measure the intake valve movement.4. Rotate the crankshaft in the direction of normal engine rotation. Stop when the intake valve is 1.91 mm (.075 in.) off its seat in the opening sequence. At this point, the crankshaft Top Center Position Mark must be in the position as follows:Camshafts with two bolt drive gear ... 4 2° After Top CenterCamshafts with one bolt drive gear ... 2 2° Before Top Center