Exmark 312 Lawn Mower User Manual


 
Maintenance
Dielectric Grease
Dielectric grease is used on all blade type electrical
connections to prevent corrosion and loss of contact.
Dielectric grease should not be applied to sealed
connectors.
Adjustments
Note: Disengage PTO, shut off engine, wait for
all moving parts to stop, engage parking brake, and
remove key before servicing, cleaning, or making any
adjustments to the unit.
Deck Leveling
See Adjusting the Cutting Height section in
Operation.
Pump Drive Belt Tension
Self-tensioning - No adjustment necessary.
PTO Clutching Belt Tension
See Inspect PTO Clutching Belt Tension section.
Deck Belt Tension
Self-tensioning - No adjustment necessary.
Park Brake Adjustment
1. Shut off engine and wait for all moving parts to
stop.
2. Disengage the park brake.
3. Remove the hairpin in the park brake linkage.
Turn the linkage in the yoke until there is 3/16
inch (4.8 mm) to 1/4 inch (6.4 mm) clearance
between the park brake tire bars and the tires with
the park brake disengaged. Re-install the hairpin.
Hydro Drive Linkage
Adjustment
Adjust Speed Control Linkage and Neutral
Safety Switch:
1. Stop engine and wait for all moving parts to
stop. Engage parking brake. Remove key or
spark plug wire(s).
2. Move the speed control lever (located on
the console) to the full forward position and
check the orientation of the tabs on the ends
of the speed control crank (see Figure 17).
These tabs should be pointing straight down
at the 6 o’clock position or slightly forward.
Adjust the threaded yoke at the bottom of the
36