Cooling System Maintenance; Cooling System Safety; Checking The Engine-Coolant Level; Cleaning The Radiator - Toro Z Master Professional 7500-D Series Operator's Manual

Cooling System
Maintenance

Cooling System Safety

•
Swallowing engine coolant can cause
poisoning; keep out of reach from children and
pets.
•
Discharge of hot, pressurized coolant or touching
a hot radiator and surrounding parts can cause
severe burns.
– Always allow the engine to cool at least 15
minutes before removing the radiator cap.
– Use a rag when opening the radiator cap, and
open the cap slowly to allow steam to escape.
Checking the
Engine-Coolant Level
Service Interval: Before each use or daily
Coolant specification: 50/50 solution of water and
permanent ethylene-glycol antifreeze
Cooling-system capacity: 7.6 L (8 US qt)
1. Park the machine on a level surface, disengage
the blade-control switch, and engage the parking
brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Open the hood.
4. Check the level of the coolant in the expansion
tank (Figure 57).
Note:
The coolant level should be between the
marks on the side of the tank.
1. Expansion-tank cap
2. Full line
5. If coolant level is low, remove the expansion-tank
cap, and add the specified coolant
Important:
Do not overfill.
6. Install the expansion-tank cap.
7. Close the hood.

Cleaning the Radiator

Service Interval: Every 50 hours—Clean the
engine-cooling system (more often
in dirty and dusty conditions).
Clean the radiator to prevent the engine from
overheating.
Note:
If the mower deck or engine shuts off due to
overheating, check the radiator for excessive buildup
of debris.
1. Park the machine on a level surface, disengage
the blade-control switch, and engage the parking
brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Rotate the hood forward.
4. Using compressed air, blow out debris stuck
between the fins of the entire radiator, both from
the top down and bottom up.
5. If debris remains, it may be necessary to use
water from a low-pressure hose.
If the radiator is clean, proceed to step 7.
6. Cover the engine with a piece of cardboard or
a plastic sheet. Squirt water through the fins.
Blow through with low-pressure air from both
directions.
51
Figure 57
3. Add line
(Figure
g227787
57).