Testing And Inspection - Toro Groundsmaster 455-D Service Manual

Testing and Inspection

Injection Pump Timing
(See Timing of Injection Pump in the Engine Overhaul
section.)
Glow Plug Test
CAUTION
Be careful while handling
plugs. Glow plugs become extremely hot. Ac­
cidental contact with the heated plug tip could
cause personal in ury. j
1. Disconnect the wire lead(s) to the glow plug.
2. Remove the glow plug.
3. Inspect the glow plug for signs of a burnt glow plug
end tube.
NOTE: If the metal of the glow plug end is melted, it is
a sign of cylinder overheating.
4. Connect the positive (+) battery terminal to the glow
plug terminal, and the negative (–) battery terminal to
the plug body (Fig. 34). If the glow plug glows red-hot in
9 to 12 seconds, the glow plug is operating correctly. DO
NOT leave on more than 20 seconds.
5. Replace any glow plugs that do not operate correctly.
Groundsmaster 455-D
or testing glow
Page 3 - 27 Rev. B
Figure 34
Engine