Exmark 312 Lawn Mower User Manual


 
Operation
Adjusting the Anti-Scalp Rollers
It is recommended to change the anti-scalp roller
position when the height of cut has changed.
1. Stop the machine and move the drive levers to
the neutral lock position.
2. Disengage the PTO.
3. Engage the park brake.
4. Stop the engine, remove the key and wait for all
moving parts to stop.
5. After adjusting the height of cut, adjust the
anti-scalp rollers by removing the whizlock nut
and spring disc washer.
6. Adjust anti-scalp rollers for Normal Operating
Conditions. Place rollers in one of the positions
shown in
Figure 8. Rollers will maintain 3/4
inches (19 mm) clearance to the ground to
minimize gouging and roller wear or damage.
Note: For Maximum Deck Flotation, place
rollers one hole position lower. Rollers should
maintain 1/4 inch (6.35 mm) clearance to ground.
Do Not adjust rollers to support the deck. Be
sure roller bolts are installed with the spring disc
washer between head of the nut and mounting
bracket.
Figure 8
For cutting heights above 3.5 inches (38 mm) use the
bottom hole. The rollers will still be effective against
scalping.
1. Anti-scalp roller
mounting bracket
2. Cutting height
7. Torque the 3/8–16 whizlock nut to 30-35 ft-lb
(41-47 N-m) (Figure 9).
8. If the 3/8 nyloc nut has been removed, reinstall
and torque to 30–35 ft-lb (41-47 N-m) (Figure 9).
Figure 9
1. Spring disc washer
(cone towards nut )
3. 3/8 nyloc-torque to 30-35
ft-lb (41-47 N-m)
2. Front right anti-scalp
bracket shown
4. 3/8-16 whizlock nut
torque to 30-35 ft-lb
(41-47 N-m)
Transporting
Transporting a Unit
WARNING
Loading the mower onto a trailer without strong
enough or properly supported ramps could be
dangerous. The ramps could collapse causing
the unit to fall, which could cause injury.
Use proper ramps that are secured to the
truck or trailer.
Keep feet and legs out from under the unit
when loading and unloading.
If necessary, use assistance when loading.
Consult the NFPA 58: Liqueed Petroleum Gas
Code for additional information regarding LPG
transportation.
Be sure the fuel valve is closed.
Place spare LPG tank(s) in a DOT approved
storage cage.
Transport tanks in an upright, vertical and
secure position to minimize movement,
tipping, or physical damage relative to other
tanks or to the storage cage while in transit.
Place tanks so that valves, ttings, or gauges
are protected from physical damage during
transport.
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