Checking The Wheel Hub Slotted Nut; Adjusting The Mower Level - Toro 74236 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. 54).
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. 54).
5. If more than two threads are showing, remove the nut
and install the washer between the hub and nut
(Fig. 54).
6. Torque the slotted nut to 125 ft.-lb. (170 N m) (Fig. 54).
7. Tighten the nut until the next set of slots line up with
the hole in the shaft (Fig. 54).
8. Install the cotter pin.
4
2
Figure 54
1. Slotted nut
2. Two threads or less
showing

Adjusting the Mower Level

1. Position the 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 4 tires. If needed, adjust to
13 psi (90 kPa).
3. Set the anti-scalp rollers to the top holes or remove
them completely for this adjustment.
4. Raise the deck to the transport position and take all
force off of the two large deck lift springs by loosening
the nut in front of each spring (Fig. 55).
1
3
m–4638
3. Hole in threaded rod
4. Washer (if needed)
41
5. Place 2 thick blocks (1-1/2 in. [38 mm]) under the rear
left and right lower edge of the mower. Place 1 block
(2-1/4 in. [57 mm]) under the front center lower edge of
the mower. Lower the mower to the 2 in. (51 mm)
height-of-cut position (Fig. 55).
Figure 55
1. Transport position
2. 2 in. (51 mm) height-of-cut
6. Loosen the 4 top chain bolts in the slots. Check the
length of the rod/swivel assemblies. The distance from
the outside of the rear swivel to the outside of the front
swivel should be 19-17/32 in. (496 mm) (Fig. 56).
Make sure that all four swivels move freely in the holes.
1
3
Figure 56
1. 19-17/32 in. (496 mm)
outside swivels
2. Top chain bolt
7. If the measurement is not 19-17/32 in. (496 mm) on
each side, adjust by turning the nuts on either side of the
front swivels.
8. Lift up on the 4 top chain attachment bolts, in the slots,
to take the slack out of the chains and tighten the flange
locknuts. (The deck is still supported by two rear and
one front blocks under the mower.)
9. If the bolts contact the end of the slots, shorten or
lengthen the rod/swivel assemblies as required for extra
clearance. Adjust each side the same amount.
1
2
m–4164
4
2
m–3747
2
3. Front swivel
4. 11 in. (279 mm) spring
compressed