SEAL-O-RING 3346206 - Caterpillar

Illustration 1 g00288893 (1) DowelAssembled height ... 8.0 1.0 mm (0.32 0.04 inch) (2) Valve guideID of valve guide ... 16.031 0.028 mm (0.6311 0.0011 inch) (3) Bridge dowelAssembled height ... 105.0 2.0 mm (4.13 0.08 inch) (4) 1W-1749 SpringLength under test force ... 79.3 mm (3.12 inch)Test force ... 361 36 N (80 8 lb)Free length after test ... 107.0 mm (4.21 inch)Outside diameter ... 47.9 mm (1.89 inch) (5) 1W-1748 SpringLength under test force ... 84.9 mm (3.34 inch)Test force ... 758 76 N (170 17 lb)Free length after test ... 114.0 mm (4.49 inch)Outside diameter ... 68.0 mm (2.68 inch) (6) Valve guideAssembled height ... 20.0 2.0 mm (0.79 0.08 inch) (7) Cylinder head nutUse the following procedure to tighten the cylinder head nuts:
Lubricate the washer face and the stud threads with 5P-3931 Anti-Seize Compound.
Assemble the seals, the gasket, and the washers to the cylinder head. Tighten the nuts by hand.
Simultaneously tension each set of the cylinder head studs with either of the following tensioners: 207-5034 Stud Tensioner Tool Gp ... 40000 1520 kPa (5800 220 psi)The canceled 191-5320 Stud Tensioner Tool Gp or the newer 301-5215 Stud Tensioner Tool Gp ... 125000 4920 kPa (18130 715 psi)
Tighten the nuts by hand.
Slowly release the pressure.
Repeat Step 3 through Step 5. (8) Check valve assemblyTorque ... 115 15 N m (85 10 lb ft)Torque for plug (not shown) ... 45 9 N m (33 7 lb ft) (9) ValveAngle of the face of the inlet valve ... 20 1/4 1/4 degreesAngle of the face of the exhaust valve ... 20 1/4 1/4 degrees (10) GasketThickness ... 4.00 0.10 mm (0.160 0.004 inch)Surfaces must be parallel within the following dimension. ... 0.03 mm (0.001 inch)
Illustration 2 g00290111
Inlet and exhaust valves
(11) Valve seat insertDepth ... 24.00 0.15 mm (0.945 0.006 inch) (12) Valve stemLubricate the inlet valve stems and the exhaust valve stems with 8T-2998 Lubricant.OD of valve stem ... 15.980 0.007 mm (0.6291 0.0003 inch)ID of valve guide ... 16.031 0.028 mm (0.6311 0.0011 inch) (13) Valve seat insertOD of valve seat insert ... 97.195 0.015 mm (3.8266 0.0006 inch)Bore for inserts ... 97.000 0.025 mm (3.8189 0.001 inch) (14) Valve seat insertFull face contact is required between both the valve and the insert for the full 360 degrees.Minimum width of the seat ... 3.0 mm (0.12 inch)Angle of valve seat insert ... 20 1 degrees (15) DimensionMaximum recess from the closed valve face to the surface of the cylinder head ... 2.0 mm (0.08 inch)Maximum projection of the closed valve above the surface of the cylinder head ... 0.50 mm (0.020 inch) (16) OD of valveInlet valve ... 90.00 0.20 mm (3.543 0.008 inch)Exhaust valve ... 90.00 0.20 mm (3.543 0.008 inch) (17)