Exmark Lazer Z XS - Manual (Page 41)

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a) This adjustment must be made with the drive wheels turning. Raise the
rear of machine up and support with jack stands (or equivalent support)
just high enough to allow drive wheels to turn freely.
b) Unhook seat latch and tilt seat forward.
c) Remove the electrical connection from the seat safety switch, located
directly to the left of the seat switch assembly beside the hydraulic oil
reservoir.
Temporarily install a jumper wire across the terminals in the connector of the
wiring harness.
d) Run the unit at least 5 minutes with the drive levers at full forward speed to
bring hydraulic system oil up to operating temperature.
e) Loosen lock nuts from the ball joints at each end of the RH pump control
linkage. (See Figure 13).
NOTE: The nut to the front of the unit on the RH rod has left-hand threads.
FIGURE 13
f) Start engine. Brake must be engaged and motion control levers out to
start engine. Operator does not have to be in the seat. Run engine at
full throttle and release brake.
g) The reverse indicator spring must be correct before the following
adjustments can be made. See Section 4.2.10.
NOTE: The motion control lever needs to be in neutral while making
any necessary adjustments.
The left rod assembly controls the left wheel and the right rod assembly
controls the right wheel.
h) Bring the RH motion control lever into the neutral position. Adjust RH
pump control rod length by rotating the double nuts on the rod in the
appropriate direction until the wheels slightly creep in reverse. (See Figure
13) Move the motion control lever to the reverse position and while
applying slight pressure to the lever allow the reverse indicator spring to
bring the levers back to neutral. The wheel must stop turning or slightly
creep in reverse.
i) When adjustment is complete, re-tighten lock nuts onto ball joints at Rear
of the RH pump control linkage (See Figure 13).
j) Bring the LH motion control lever into the neutral position. Adjust the LH pump
control rod length by rotating the tracking adjustment knob in the appropriate
direction until the wheels slightly creep in reverse. Move the motion control
lever to the reverse position and while applying slight pressure to the lever
allow the reverse indicator spring to bring the levers back to neutral. The
wheel must stop turning or slightly creep in reverse (See Figure 13).