Toro ProLine 30159, Operator'S Manual

Page: 28 / 40

Maintenance
26
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 24).
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.
IMPORTANT: Never clean the spark plug(s).
Always replace the spark plug(s) when it has:
a black coating, worn electrodes, an oily film,
or cracks.
2. Check the gap between the center and side
electrodes (Fig. 24). Bend the side electrode
(Fig. 24) if the gap is not correct.
0.040 in.
(1.02 mm)
2
3
1
Figure 24
1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
Installing the Spark Plug
(s)
1. Install the spark plug(s) and metal washer. Make
sure the air gap is set correctly.
2. Tighten the spark plug(s) to 20 ft-lb (27 N.m).
3. Push the wire(s) onto the spark plug(s) (Fig. 23).
Greasing and Lubrication
Service Interval/Specification
Grease the wheel bearings every 8 operating hours
and the transmission couplers every 200 operating
hours. Grease more frequently when operating
conditions are extremely dusty or sandy.
Grease Type: General-purpose grease.
How to Grease
1. Disengage the power take off (PTO), set the
parking brake, and turn the ignition key to
“OFF” to stop the engine. Remove the key.
2. Clean the grease fittings with a rag. Make sure to
scrape any paint off the front of the fitting(s).
3. Connect a grease gun to the fitting. Pump grease
into the fittings until grease begins to ooze out of
the bearings.
4. Wipe up any excess grease.
Where to Add Grease
1. Lubricate the wheel bearings and front spindles
until grease begins to ooze out of the bearings
(Fig. 25).
2147
Figure 25