Toro 74178 - Servicing the Spark Arrester; Cleaning the Cooling Systems; Greasing and Lubrication

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Servicing the Spark Arrester
Inspect the spark arrester every 50 hours for damage, such
as holes in the screen, and for buildup on the screen. If it is
damaged, replace it with a new spark arrester. If it is dirty,
remove it and clean the screen with a wire brush and/or
soak it in solvent.
Cleaning the Cooling Systems
Cleaning the Engine Screen
Before each use, check and clean the engine screen.
Remove any buildup of grass, dirt, or other debris from the
engine air intake (Fig. 38).
m–3801
1
ÓÓ
ÓÓ
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Figure 38
1. Engine screen
Cleaning the Engine Fins
Every 100 hours clean engine cylinder and cylinder head
cooling fins. Also clean around carburetor, governor levers
and linkage. This will make sure adequate cooling to
hydraulic pumps, motors and engine and will reduce the
possibility of overheating and mechanical damage.
1. Remove the panels from the engine shroud.
2. Clean the engine cooling fins.
3. Install the panels onto the engine shroud.
m–5616
1
2
3
Figure 39
1. Panel
2. Engine shroud
3. Screws
Greasing and Lubrication
Lubricate the machine when shown on the Check Service
Reference Aid decal (Fig. 40). Grease more frequently
when operating conditions are extremely dusty or sandy.
Grease with No. 2 general purpose lithium base or
molybdenum base grease.
How to Grease
1. Disengage the power take off (PTO), stop the engine,
and remove the key.
2. Clean the grease fittings with a rag. Make sure to scrape
any paint off of 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
Lubricate the grease fittings as shown on the Check
Service Reference Aid decal (Fig. 40).
Figure 40
Greasing the Front Castor Pivots
Lubricate the front castor pivots once a year.
1. Remove the hex plug and cap. Thread a grease zerk into
the hole.
2. Pump grease into the zerk until it oozes out around the
top bearing.
3. Remove the grease zerk in the hole. Install the hex plug
and cap.