Spark Plug: Service and Repair

REPLACING SPARK PLUGS

NOTE: Remove both rear mufflers.

1. Remove engine guard. Remove ball clamps from tailpipe and rear muffler I catalytic converter and take out hexagon head bolts. Remove both tailpipes.




2. Undo rear muffler at tightening strap and lift out rear muffler. Remove rear muffler bracket.
3. Undo hot-air hose from right-hand heat exchanger (cyls. no. 4 to 6) and from air distributor pipe and take off hose.
4. Undo both left and right-hand engine covers from camshaft housing, hydraulic pump support bracket as well as front and rear engine cover. Leave engine cover suspended at ignition cables.





5. If spark plugs are difficult to remove, use Special Tool (disassembly clamp) 9513, Part No. 000.721.951.30.

6. Unscrew spark plugs with commercially available Snap-on socket, Part No. S 9706, and Snap-on extension, Part No. FXW 4.

NOTE: Do not use any lubricant on the plug threads.