Adjusting The Push Arms - Toro 74179 Operator's Manual

5. Place 2 thick blocks (1-1/4 in. [35 mm]) under the rear
left and right lower edge of the mower. Place 1 block
(1-3/8 in. [44 mm]) under the front center lower edge of
the mower, not under the anti-scalp roller brackets.
Lower the mower to the 1-1/2 in. (38 mm) height-of-cut
position (Fig. 50).
Figure 50
1. Transport position
6. Loosen the bottom chain bolt in the slot at the rear of
the deck. Repeat for the opposite side (Fig. 51).
Note: Do not loosen the front chain hardware.
7. Loosen the front and rear locking nut on either side of
the front swivel. Loosen until the front chains are loose
and the deck is supported by blocks. Repeat for the
opposite side. (Fig. 51).
Note: When the hardware is loose, the deck will rotate the
lift handle up, out of position.
8. When the hardware is loosened, the remaining tension
in the large support springs will tend to rotate the deck
lift handle up, out of the 1-1/2 in. (38 mm) position.
Press down on the rear deck support arm to firmly
return the deck lift handle to the 1-1/2 in. (38 mm)
position (Fig. 51).
Note: Do not push on the deck lift handle.
9. While continuing to press down on the rear deck
support arm, take the slack out of the rear chain and
tighten the hardware at the bottom (Fig. 51). Downward
pressure may now be released. Repeat for the opposite
side.
10. Adjust the front swivel using the rear locking nut until
the front chain is tight and the front of the deck is still
touching the block. Tighten the front locking nut.
Repeat for the opposite side.
1
2
m–4122
2. 1-1/2 in. (38 mm)
height-of-cut
39
8
9
5
3
6
Figure 51
1. Bottom chain bolt
2. Top chain bolt
3. Front swivel
4. 10-1/4 in. (260 mm)
spring compressed
11. Recheck that the blocks fit just snuggly under the
mower and that the tension on all four chains are
approximately equal.
12. Raise the deck to the 3 in. (76 mm) height of cut and
measure the actual height from the blade tips to the
ground. The height of cut for the front blade tips should
be 3 1/8 in. (76 3 mm). The height of cut for the
rear blade tips should be 3-1/4 1/8 in. (83 3 mm).
Readjust if needed.
Note: When checking the blade tip heights, make sure that
the blades are not bent and check the blade pointing front to
rear.
13. Install anti-scalp rollers for proper height-of-cut and
tighten them securely; refer to Adjusting the Anti-Scalp
Rollers, page 21.
14. Raise the deck lift lever to the transport position
(Fig. 50).
15. Adjust the compression springs by turning the front
spring nuts so that the distance between the two large
washers is 10-1/4 in. (260 mm); then tighten the jam nut
(Fig. 51).
Note: Make sure that all hardware is tight.

Adjusting the Push Arms

1. To adjust the push arms, loosen the jam nut and rotate
the ball joint counterclockwise, one turn at a
time.(Fig. 52).
2. Adjust each side the same amount. Each push arm
should have a nominal length of 15-5/16 in. (389 mm)
(Fig. 52).
7
1
4
2
m–4116
5. Rear locking nut
6. Front locking nut
7. Rear deck support arm
8. Front spring nut
9. Jam nut