Toro Z557 Z Master - Toro Mower Brake and Belt Maintenance

Figure 47
1. Engine screen
2. Oil cooler
Cleaning the Engine Fins
Ev er y 100 hours clean the engine cylinder and
cylinder head cooling fins . Also clean around
carburetor , g o v er nor lev ers and linkag e . T his will
mak e sure adequate cooling to h y draulic pumps ,
motors and engine and will reduce the possibility
of o v erheating and mec hanical damag e .
1. R emo v e the engine shroud.
2. Clean the engine cooling fins .
3. Install the engine shroud.
Figure 48
1. Panel
3. Screws
2. Engine shroud
Brake Maintenance
Adjusting the Parking Brake
Chec k the parking brak e for proper adjustment.
1. Diseng ag e brak e lev er (lev er do wn).
2. Measure the length of the spring .
T he measurement should be 2-3/4 inc h (70
mm) betw een w ashers ( Figure 49 ).
Figure 49
1. Brake lever 4. Collar on brake rod
2. Spring (2-3/4 inches/70
mm)
5. 3/16–1/4 inch (5–7 mm)
3. Adjusting nuts 6. Jam nut and yoke
3. If adjustment is necessar y , loosen the jam n ut
belo w the spring and tighten the n ut directly
belo w the y ok e ( Figure 49 ). T ur n the n ut until
the cor rect measurement is obtained. Tighten
the tw o n uts tog ether and re peat on opposite
side of unit.
4. T ur n n uts cloc kwise to shor ten spring length
and tur n counter -cloc kwise to lengthen the
spring .
5. Eng ag e parking brak e , lev er up .
6. Measure the distance betw een the tr unnion
roller and the collar on brak e rod.
T he measurement should be 3/16-1/4 inc h
(5-7 mm) ( Figure 49 ).
7. If adjustment is necessar y , loosen the jam n ut
directly belo w the y ok e . T ur n the bottom rod
until the cor rect measurement is obtained
( Figure 49 ). Tighten jam n ut at y ok e
Belt Maintenance
Inspecting the Belts
Inspect all belts ev er y 100 hours .
Chec k belts for crac ks , fra yed edg es , bur n marks
or any other damag e . R e place damag ed belts .
Replacing the Mower Belt
Squealing when the belt is rotating, blades slipping
when cutting g rass , fra yed belt edg es , bur n marks
and crac ks are signs of a w or n mo w er belt. R e place
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