John Deere約翰迪爾強鹿柴油發動機氣缸蓋閥凹槽與氣門的測量與技術參數

Measure and record valve recess (A) using a depthmicrometer, magnetic base dial indicator or a dial indicatorwith JDG451 or KJD10123 Height Gauge (B).Measurements must be made a maximum of 3.0 mm(0.12 in.) in from edge of valve head.

Specification

Intake Valves—Recess inCylinder Head 0.61—1.11 mm(0.024—0.044 in.)

Wear Limit ................................................................. 1.63 mm (0.064 in.)

Exhaust Valve—Recess in

Cylinder Head 1.22—1.72 mm(0.048—0.068 in.)

Wear Limit .................................................................. 2.26 mm (0.089 in.)

Install new valves and inserts, or grind existing valves andinserts, as necessary, to obtain proper valve recess. Grindvalve seat inserts as required. (See REMOVE VALVESEAT INSERTS later in this group.)

A—Valve Recess

B—Dial Indicator