Hitachi NR90GC Service Manual - Page 34

10-2. Disconnection and Reconnection of Wiring between Cylinder Head Section and Handle Section The Model NR 90GC is comprised of three sections, cylinder head section, housing section and handle section. The wiring between the cylinder head section and the handle section must be disconnected before disassembly and reassembly of each section. Refer to 10-3, 10-4 and 10-5 for disassembly and reassembly of each section. Cylinder head section Four bolts Hanging mechanism Spark plug cable (One thick red cable) Housing section Two bolts Handle section Wiring connected to the motor. Connector is provided. (One thin red wire and one thin black wire) Fig. 23 [Tools required] Hex. bar wrench (4 mm) Phillips screwdriver (a) Disassembly (Fig. 24) Remove the Hex. Socket Hd. Bolt M5 x 14 [1] and the Washer M5 [2] then open the Top Cover [3]. (Do not open the Top Cover [3] excessively. Otherwise, it may be broken.) Disconnect the red cable from Spark Plug (A) [11]. Be sure to hold the black rubber cap at disconnection to prevent the cable from being damaged. Do not yank the cable. If it is difficult to disconnect the rubber cap from Spark Plug (A) [11], pry the rubber cap off with a Phillips screwdriver or the like by fitting the tip of the Phillips screwdriver in the root of the cable outlet of the rubber cap. Remove the connector from the two wires coming from the Motor [6]. Remove the Hex. Socket Hd. Bolts M5 x 20 [13] and remove the cylinder head section from the main body. --- 31 ---