Checking The Wheel Hub Slotted Nut; Adjusting The Level Of Mower - Toro 74177 Operator's Manual

Checking the Wheel Hub
Slotted Nut
Check after every 500 operating hours.
The slotted nut needs to be torqued to 125 ft–lb (170 N m).
1. Stop the engine, set the parking brake, remove the key,
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Remove the cotter pin.
3. Torque the slotted nut to 125 ft–lb (170 N m) (Fig. 55).
4. Check the distance from the bottom of the slot in the
nut to the inside edge of the hole. Two threads or less
should be showing (Fig. 55).
5. If more than two threads are showing, remove the nut
and install a washer between the hub and nut (Fig. 55).
6. Torque the slotted nut to 125 ft–lb (170 N m) (Fig. 55).
7. Tighten the nut until the next set of slots line up with
the hole in the shaft (Fig. 55).
8. Install the cotter pin.
4
5
2
Figure 55
1. Slotted nut
2. Two threads or less
showing

Adjusting the Level of Mower

1. Position mower on a flat surface. Stop the engine, set
the parking brake, remove the key and disconnect the
spark plug wire(s) from the spark plug(s).
2. Check tire pressure of all four (4) tires. If needed, adjust
to 13 psi (90 kPa)
3. Set anti-scalp rollers to top holes or remove them
completely for this adjustment.
1
3
m–4638
3. Hole in threaded shaft
4. Washer (if needed)
5. Slot
40
4. Raise the deck to the transport position (Fig. 56). Take
force off of the two large deck lift springs by loosening
jam nut and front spring nut, in front of each spring, as
far as possible (Fig. 57).
5. Place two 1-1/4 inch (35 mm) thick blocks under rear
left and right lower edge of mower. Place one 1-3/8
(44 mm) block under front center lower edge of mower.
Not under anti-scalp roller brackets. Lower mower to
the 1-1/2 inch (38 mm) height-of-cut position (Fig. 56).
Figure 56
1. Transport position
6. Loosen bottom chain bolt in slot at rear of deck. Repeat
for opposite side. (Fig. 57).
Note: Do not loosen front chain hardware.
7. Loosen front and rear locking nut on either side of front
swivel. Loosen until front chains are loose and deck is
supported by blocks. Repeat for opposite side. (Fig. 57).
Note: When hardware is loose, deck will rotate the lift
handle up out of position.
8. When hardware is loosened, remaining tension in the
large support springs will tend to rotate the deck lift
handle up, out of the 1-1/2 inch (38 mm) position. Press
down on the rear deck support arm to firmly return the
deck lift handle to the 1-1/2 inch (38 mm) position
(Fig. 57).
Note: Do not push on deck lift handle.
9. While continuing to press down on rear deck support
arm, take the slack out of the rear chain and tighten
hardware at the bottom (Fig. 57). Downward pressure
may now be released. Repeat for opposite side.
10. Adjust front swivel using rear locking nut until the front
chain is tight and front of deck is still touching block.
Tighten front locking nut. Repeat for opposite side.
1
2
m–4122
2. 1-1/2 (38 mm)
height-of-cut