Hitachi CS 33EDP Service Manual page 19

7. Disassembly and reassembly of the muffler
[Tools required]
• Phillips screwdriver
• Hex. bar wrench (5 mm)
(1) Disassembly
• Remove the two Tapping Screws (W/Flange) D4 x 16 (Black) [1] that secure the Muffler Cover [2].
• Remove the two Hex. Socket Hd. Bolts M6 x 55 [61] that secure the Muffler [59], and then remove
Bolt Washer M6 [62] and the Muffler Packing [60].
• Remove the three Screws (W/Washers) M4 (Black) [52] and detach the Muffler Gauze [58], Gauze
Fixing Plate [57], Muffler Special Packing [56], Exhaust Pipe [55], Muffler Special Packing (S) [54],
and Packing Plate [53].
(2) Reassembly
Reassembly can be conducted by reversing the disassembly procedure. However, special attention
should be given to the following items.
• Do not reuse the Hex. Socket Hd. Bolt M6 x 55 [61].
• To maintain sealing performance, replace the Muffler Packing [60] with a new one.
• If the Muffler Special Packing [56] or Muffler Special Packing (S) [54] has any breakage or cracks,
replace it with a new one.
• Perform reassembly from the muffler side in the following order: Muffler Gauze [58], Gauze Fixing
Plate [57], Muffler Special Packing [56], Exhaust Pipe [55], Muffler Special Packing (S) [54], and
Packing Plate [53].
• Attention must be paid to the mounting direction of the Gauze Fixing Plate [57]. (The rectangular
shape of the Exhaust Pipe [55] shall match that of the plate.)
• Before attaching the Muffler [59], degrease the screw holes of the Cylinder [74].
• Tighten the Muffler [59] with the Hex. Socket Hd. Bolt M6 x 55 [61] to 5.5 to 9.0 N•m, and after
checking the operation, retighten it by 10 to 12 N•m.
• Muffler
Screw (W/Washers) M4 (Black) [52]
Packing Plate [53]
Hex. Socket Hd. Bolt M6 x 55 [61]
Bolt Washer M6 [62]
Muffler Special Packing (S) [54]
Exhaust Pipe [55]
Muffler Special Packing [56]
Gauze Fixing Plate [57]
Muffler Gauze [58]
Muffler [59]
Muffler Packing [60]
Engine Case Ass'y [51]
Tapping Screw (W/Flange) D4 x 16 (Black) [1]
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Muffler Cover [2]