Exmark METRO Operator's Manual page 34

For the highest quality cut, place all four spacers between the blade and the
spindle shaft.
If the mulching kit is installed, the highest quality cut can be obtained with 3
spacers between the blade and spindle (minimum is 1 for a good cut).
If you need to cut higher or lower than what the spacers will allow, it will be
necessary to adjust the rear axle height and caster position. See Section 5.2.2
below.
5.2.2 Axle height and caster position.
Desired cutting height range can be obtained by adjusting the rear axle and
placing caster spacers above or below the caster arm (See Figures 19 and 20
along with the Cutting Height Adjustment Chart). It may be necessary to
readjust wheel drive and brake linkages.
To adjust rear axle:
a) Stop engine and wait for all moving parts to stop. Remove key or spark plug
wire(s).
b) Place the drive levers in the neutral lock position.
c) Remove mower deck belt shield for access to axle adjustment bolts.
d) Loosen but do not remove the two (2) axle pivot bolts and the two (2) axle
adjustment bolts (See Figure 20).
e) Place a jack under the rear center of the engine deck.
f) Raise the back end of the engine deck up enough to remove the two (2) axle
adjustment bolts.
g) With the jack, raise or lower the back end of the engine deck so that two (2)
axle adjustment bolts can be reinstalled in desired hole location. A tapered
punch can be used to help align the holes.
h) Retighten all four (4) bolts, lower unit and remove jack.
i) Install mower deck belt shield.
j) Adjust wheel drive and brake linkages as required. (See Sections 3.13 and 3.14).
k) Adjust the caster spacers as directed in chart to match with the axle hole
selected. (See Figure 19).
l) Refer back to 5.2.1 for adjusting the cutting height with blade spacers.
(12 mm)
(5 mm)
FIGURE 19
CASTER HEIGHT ADJUSTMENT
These models have five (5) axle positions; four (4) 1/2" (1.3 cm) caster spacers; one (1)
3/16" (.47 cm) caster spacer, and four (4) blade spacers.
NOTE: The axle positions are in 1/2" (1.3 cm) increments and the large caster spacers
are 1/2" (1.3 cm) thick. Therefore, by adjusting the same number of 1/2" (1.3 cm) caster
spacers as axle hole positions the blades will retain the same front-to-back tip (rake).
Axle Pivot Bolt
Place Jack
Here
Axle Adjustment Holes are actually
in the side of the rear deck.
FIGURE 20
AXLE HEIGHT ADJUSTMENT
- 29 -
Axle
Adjustment
Holes
Pos. A
Pos. B
Pos. C
Pos. D
Pos. E