Checking the Spark Plugs
Service Interval:
Every 160 hours
Remove spark plugs, check condition and reset gaps, or
replace with new plugs. See the
Engine Owner's Manual
.
Servicing the Spark Plug
Service Interval:
Every 100 hours
Type for all Engines:
NGK BPR4ES or equivalent
Air Gap:
0.75 mm (0.03 inch)
Make sure the air gap between the center and side electrodes
is correct before installing the spark plug.
Use a spark plug wrench for removing and installing the spark
plug(s) and a gapping tool/feeler gauge to check and adjust
the air gap. Install a new spark plug(s) if necessary.
Removing the Spark Plug
1.
Stop the engine, set the parking brake, remove the key,
and wait for all moving parts to stop before leaving the
operating position.
2.
Remove the spark plug as shown in
.
Figure 40
Checking the Spark Plug
Important:
Do not clean the spark plug(s). Always
replace the spark plug(s) when it has a black coating,
worn electrodes, an oily film, or cracks.
If you see light brown or gray on the insulator, the engine is
operating properly. A black coating on the insulator usually
means the air cleaner is dirty.
Set the gap to 0.75 mm (0.03 inch).
G008794
1
2
Figure 41
Installing the Spark Plug
Tighten the spark plug(s) to 22 N-m (16 ft-lb).
Figure 42
34
Summary of Contents for 23518
Page 53: ...Schematics Electrical Diagram Rev A 53...
Page 54: ...Electrical Schematic Rev A 54...
Page 55: ...Hydraulic Diagram Rev A 55...