Changing The Engine Coolant; Spark Plugs - Toro 73580 Operator's Manual

Maintenance

Changing the Engine Coolant

POTENTIAL HAZARD
Coolant is hot and pressurized.
WHAT CAN HAPPEN
Discharge of hot pressurized coolant can
cause severe burns.
HOW TO AVOID THE HAZARD
Do not remove the radiator cap when the
engine is hot. Always allow the engine to
cool at least 15 minutes or until the
radiator cap is cool enough to touch
without burning your hand before
removing the radiator cap.
1. Park the machine on a level surface, disengage
the power take off (PTO), set the parking brake,
lower the attachment lift, and turn the ignition
key to "STOP" to stop the engine. Remove the
ignition key.
2. Remove the radiator cap and reserve tank cap
(Fig. 32).
1
1
Figure 32
1. Radiator cap
Note: If you wish, you can attach a 3/8 ID
hose to the drain valve.
34
2
2
m–3606
2. Reserve tank cap
3. Open the coolant drain at the bottom of the
radiator and allow coolant to flow into a drain
pan. When coolant stops flowing, close the
drain.
4. Remove the coolant plug from the engine and
allow coolant to flow into the drain pan. When
coolant stops flowing, install the drain plug.
5. Slowly fill the radiator with a 50/50 mixture of
water and permanent ethylene glycol anti–freeze.
Install the radiator cap.
6. Slowly fill the reserve tank until the level
reaches the upper line. DO NOT OVERFILL.
Install the reserve tank cap.
7. Start the engine and operate it until it is warm.
Recheck the coolant level after the engine has
cooled down and replenish, if required; refer to
Check the Cooling System, page 15.

Spark Plugs

Service Interval/Specification
Check the spark plugs and reset the air gap as
necessary. Replace the spark plugs after every 100
operating hours. Make sure the air gap between the
center and side electrodes is correct before installing
the spark plugs. Use a spark plug wrench for
removing and installing the spark plugs and a
gapping tool/feeler gauge to check and adjust the air
gap.
Type: NGK BMR4A
Air Gap: 0.024–0.028" (0.6–0.7 mm)