Index Manuals GENERATOR DIESEL ENGINE DP158LCF/LCS/LDF/LDS, DP180LBS/LAS/LBF/LAF, DP222LAS/LBF/LBS/LCF/LCS. Maintenance Manual
|
|
4. Regular inspection 64 Cylinder block/head Valve Clearance Adjust the valve clearance. • When disassembling the engine or cylinder head. • When there is excessive noise in the valve connec- tion. • When the engine runs abnormally even if the fuel injection system is normal. Adjusting the Valve Clearance DV2213041A DV2213042A DV2213213A DV2213043A 1. Rotate the crankshaft so that #1. cylinder may be positioned at the compression TDC(Top Dead Center). Note) #1. Cylinder is located at the side where cooling water pump was installed. Note) In case of 8/12 cylinder engine, #6. cylinder is posi- tioned at the valve overlap when #1. cylinder is positioned at the compression TDC(Top Dead Center). Note) In case of 10 cylinder engine, #7. cylinder is posi- tioned at the valve overlap when #1. cylinder is positoned at the compression TDC(Top Dead center). 2. Loosen the lock nut of the #1. cylinder rocker arm. 3. Push the feeler gauge between a rocker arm and a valve stem. 4. Adjust the clearance screw respectively and then tighten with the lock nut. 5. As for the valve clearance, adjust it when in cold, as follows. 1 2 3 5 6 7 8 1 2 3 4
8
7
6
5
4
3
2
1 8 Cy lin d er
engine 6 7 8 9 10 1 2 3 4 5 10 9 10 Cy lin d er engine 7 8 9 10 11 12 1 2 3 4 5 6 12 9 5 12 Cy lin d er engine
4. Regular inspection 65 6. Rotate the crankshaft. When a cylinder reaches the compression TDC(Top Dead Center), adjust the valve clearance of the cylinder. 7. When a cylinder vavle overlap, adjust the valve clear- ance cylinder of the compression TDC(Top Dead Center), as follow. • 8 cylinder engine(DP158L) • 10 cylinder engine(DP180L) • 12cyliner engine(DP222L) Tightening Cylinder Head Bolt 1. Retightening cylinder head bodt on new engine. DV2213044A_E 1) The cylinder heads are mounted with cylinder head bolts which are tightened by the angle-ofrotation method. 2) On new engines the cylinder head bolts are tightened up for the first time at the factory after the engine has been broken in. 3) After the first 400 hours of operation retighten cylinder head bolts 1 to 4 in the order shown in right figure by a further 90°(1/4 revolution). Engine Model In. valve Ex. valve DP158L DP158LCS 0.25mm 0.35mm DP158LCF 0.25mm 0.35mm DP158LDS 0.25mm 0.35mm DP158LDF 0.25mm 0.35mm DP180L DP180LBS 0.25mm 0.35mm DP180LBF 0.25mm 0.35mm DP180LAS 0.25mm 0.35mm DP180LAF 0.25mm 0.35mm DP222L DP222LAS 0.25mm 0.35mm DP222LBS 0.25mm 0.35mm DP222LBF 0.25mm 0.35mm DP222LCS 0.25mm 0.35mm DP222LCF 0.25mm 0.35mm Valve overlap cylinder No. 1 5 7 2 6 3 4 8 6 3 4 8 1 5 7 2 Adjusting valve cylinder No. (In./Ex. Valve) Valve overlap cylinder No. 1 6 5 10 2 7 3 8 4 9 7 3 8 4 9 1 6 5 10 2 Adjusting valve cylinder No. (In./Ex. Valve) Valve overlap cylinder No. 1 12 5 8 3 10 6 7 2 11 4 9 6 7 2 11 4 9 1 12 5 8 3 10 Adjusting valve cylinder No. (In./Ex. Valve) CAUTION • The two outer screws (intake and exhaust sides) must not be retightened. • The cylinder head bolts to be retightened must not be loosened first, but simply tightened by a further 90°(1/4 revolution) from their actual posi- tion. 1 Intake si d e injector Exhaust si d e 4 3 2 |