Disassembly And Reassembly Of The Cylinder - Hitachi CM 75EAP Service Manual

12. Disassembly and reassembly of the cylinder

[Tools required]
• Hex. bar wrench (5 mm)
• Socket wrenches (13 mm and 19 mm)
(1) Disassembly
• Remove Spark Plug Ass'y BPMR7A [142] by using a socket wrench (19 mm).
• Remove the four Bolts M6 x 25 [168] using a hex. bar wrench (5 mm), and then remove the Cylinder
[146].
• Remove the Decomp. [144] and Decomp Cap [143] by using a socket wrench (13 mm).
(2) Reassembly
Reassembly can be conducted by reversing the disassembly procedure. However, special attention
should be given to the following items.
• Completely wipe off all liquid packing (ThreeBond 1207C) from the matching surfaces of the Cylinder
[146], Crank Case (A) [6], and Crank Case (B) [44], and from the surface of Cylinder Packing (C)
[169]. Be careful not to damage the matching surfaces.
• Never reuse the Bolts M6 x 25 [168]. Replace the bolts with new ones.
• Degrease the threaded holes of Crank Case (A) [6] and Crank Case (B) [44] before reassembling the
Cylinder [146].
• Do not reverse the orientation of Cylinder Packing (C) [169]. (Mount it according to the shape of the
exhaust port.)
• Be careful not to damage the cylindrical surface of the Cylinder [146] when disassembled. Remove
carbon dust from the exhaust port and combustion chamber, and then clean both parts with gasoline.
• Be careful not to let any dust enter the Cylinder [146] from its ports when reassembling the Cylinder
[146].
• Apply a thin coating of two-cycle oil to the cylindrical surface of the Cylinder [146] and the peripheral
surface of Piston (51.5) [172] when reassembling the Cylinder [146].
• Apply liquid packing (ThreeBond 1207C) to the entire faces on both sides of Cylinder Packing (C)
[169]. Fully degrease the mating faces before applying the grease.
• Cylinder
[143]
[144]
[44]
[142]
[146]
[169]
[172]
[149]
[147]
[168]
Apply liquid packing
(ThreeBond 1207C) to the
entire faces (both sides).
[6]
-19-
[148]
[169]