Cooling System Maintenance; Cleaning The Engine Screen And The Oil Cooler; Cleaning The Engine Fins; Brake Maintenance - Toro 74291 Operator's Manual

Cooling System
Maintenance
Cleaning the Engine Screen
and the Oil Cooler
Service Interval: Before each use or daily
Before each use, check and clean the engine screen and
oil cooler. Remove any build-up of grass, dirt or other
debris from the oil cooler screen and engine screen
(Figure 42 and Figure 43).
Figure 42
1. Engine screen
2. Oil cooler

Cleaning the Engine Fins

Service Interval: Every 100 hours
Clean around the carburetor, the governor levers and
the 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 engine shroud.
2. Clean the engine cooling fins.
3. Install the engine shroud.
Figure 43
1. Panel
2. Engine shroud
3. Screws

Brake Maintenance

Adjusting the Parking Brake

Service Interval: Every 200 hours
Check the parking brake for proper adjustment.
1. Disengage brake lever (lever down).
2. Measure the length of the spring.
The measurement should be 2-3/4 inch (70 mm)
between washers (Figure 44).
1. Brake lever
2. Spring (2-3/4 inches/70
mm)
3. Adjusting nuts
3. If adjustment is necessary, loosen the jam nut below
the spring and tighten the nut directly below the
yoke (Figure 44). Turn the nut until the correct
measurement is obtained. Tighten the two nuts
together and repeat on opposite side of unit.
4. Turn nuts clockwise to shorten spring length and
turn counter-clockwise to lengthen the spring.
5. Engage parking brake, lever up.
6. Measure the distance between the trunnion roller
and the collar on brake rod.
The measurement should be 3/16-1/4 inch (5-7
mm) (Figure 44).
7. If adjustment is necessary, loosen the jam nut
directly below the yoke. Turn the bottom rod until
the correct measurement is obtained (Figure 44).
Tighten jam nut at yoke
35
Figure 44
4. Collar on brake rod
5. 3/16–1/4 inch (5–7 mm)
6. Jam nut and yoke