Hitachi CS 51EAP User Manual

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Engine Case (B) Ass’y [80]
Oil Seal [81]
Ball Bearing 6202C3 [82]
Crank Shaft [83]
Crank Case Packing (C51) [84]
Engine Case (A) Ass’y [87]
Rear Damper (C51) [88]
Seal Lock Hex.
Socket Hd. Bolt
M5 [32]
Seal Lock Hex.
Socket Hd. Bolt
M5 x 45 [35]
Seal Lock
Screw
M5 x 12 [33]
Spike [34]
Ɣ Engine case
12. Disassembly and reassembly of the engine case
[Tools required]
Ɣ Hex. bar wrench (5 mm)
Ɣ Phillips screwdriver
Ɣ Long-nose pliers
(1) Disassembly
Ɣ Use long-nose pliers to pull out the Rear Damper (C51) [88].
Ɣ Use a Phillips screwdriver to remove the two Seal Lock Screws M5 x 12 [33] , and then remove the Spike [34] .
CAUTION: The threads of the Seal Lock Screws M5 x 12 [33] may be easily broken. Therefore, do not
tighten the screws too much.
Ɣ Use a 5-mm hex. bar wrench to remove the four Seal Lock Hex. Socket Hd. Bolts M5 [32] and two Seal
Lock Hex. Socket Hd. Bolts M5 x 45 [35]. Then remove the Engine Case (A) Ass’y [87], Engine Case
(B) Ass’y [80], and Crank Shaft [83].
Ɣ Remove Ball Bearing 6202C3 [82] and the Oil Seal [81] by pushing it out on the Oil Seal [81] side.
(2) Reassembly
Reassembly can be conducted by reversing the disassembly procedure. However, special attention
should be given to the following items.
Ɣ Do not reuse the Oil Seal [81] and Ball Bearing 6202C3 [82] removed from the Engine Case (A) Ass’y
[87] and Engine Case (B) Ass’y [80].
Ɣ Do not reuse the Crank Case Packing (C51) [84].
Ɣ Do not reuse the Seal Lock Hex. Socket Hd. Bolts M5 [32] and Seal Lock Hex. Socket Hd. Bolts M5 x 45 [35] .
Ɣ Apply 50 to 100 mg of Piloknock Universal No. 0 of JX Nippon Oil & Energy between the lips of the Oil
Seal [81].
Ɣ Carefully clean the Crank Shaft [83] by using gasoline before mounting.
Ɣ Degrease the screw holes of the Engine Case (A) Ass’y [87] and Engine Case (B) Ass’y [80] before
mounting. Do not get the Fuel Pipe [119] caught between the Engine Case (A) Ass’y [87] and Engine
Case (B) Ass’y [80] when mounting.
Ɣ Check the hole position of the Crank Case Packing (C51) [84] and mount it without misalignment.
(When mating the Engine Case (A) Ass’y [87] and Engine Case (B) Ass’y [80], confirm that the Crank
Case Packing (C51) [84] is properly mounted along the circumference of the engine case.)
Ɣ Cut off the protrusion of the Crank Case Packing (C51) [84] at the mating surface of the Cylinder [73]
after mounting.
CAUTION: Do not break the Crank Case Packing (C51) [84] when cutting it.

Hitachi CS 51EAP Specifications

General

Brand	Hitachi
Model	CS 51EAP
Category	Chainsaw
Language	English