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John Deere约翰迪尔强鹿柴油机活塞与缸套的测量方法与标准值参数
详细描述
John Deere约翰迪尔强鹿柴油机活塞与缸套的测量方法与标准值参数
1. Measure skirt OD (A) at right angles to piston pin bore,28 mm (1.1 in.) from the bottom of the piston (B).
2. Record measurement and compare measurementobtained from matching liner.
Specification
Piston Skirt—OD 28 mm (1.1 in.) from Bottom of Piston 106.38—106.40 mm (4.188—4.189 in.)
A—Skirt OD
B—Bottom of Piston Dimension
IMPORTANT: ALWAYS measure liners at room temperature.
3. Measure liner bore parallel to piston pin at top end of ring travel (A).
4. Measure bore in same position at bottom end of ring travel (B).
5. Measure bore at right angle to piston pin at top end of ring travel (C).
6. Measure bore in same position at bottom end of ring travel (D).
7. Compare measurements A, B, C, and D to determine if liner is tapered or out-of-round.
8. Compare liner ID with matched piston OD. Replace piston and liners (as a set) if they exceed wear specifications given.
Specification
Cylinder Liner—ID 106.48—106.52 mm (4.192—4.194 in.)
Cylinder Liner (Top or Bottom)—
Maximum Out-of-Round ............................................. 0.05 mm (0.002 in.)
Cylinder Liner—Maximum Taper................................ 0.05 mm (0.002 in.)
Piston-to-Liner Clearance(Measured at Bottom of PistonSkirt) (Naturally Aspirated
Engines)—Clearance 0.08—0.14 mm (0.003—0.005 in.)
Piston-to-Liner Clearance(Measured at Bottom of PistonSkirt) (Turbocharged Engines)—
Clearance 0.08—0.15 mm(0.003—0.006 in.)
