- 22 -
5.1.4
Check mower blades.
Service Interval: Daily
a)
Stop engine, wait for all moving parts to stop, and remove key.
b)
Lift deck and secure in raised position as stated in Section 5.1.3.
c)
Inspect blades and sharpen or replace as required.
For Serial Nos. 510,000 – 539,999:
d)
Re-install the blades (if they were removed) by placing a block of wood
between the front or rear baffles and the blade then torquing the blade bolts
to 115-120 ft. lbs. (156-163 N-m). Be sure the spring disk washer cone is
installed toward the bolt head. See Figure 5.
CAUTION
POTENTIAL HAZARD
♦
Operating a mower deck with loose or weakened blade
bolts can be dangerous.
WHAT CAN HAPPEN
♦
A loose or weakened blade bolt could allow a blade
rotating at a high speed to come out from under the
deck, causing serious injury or property damage.
HOW TO AVOID THE HAZARD
♦
Replace the blade bolt after striking a foreign object.
(Use only Exmark replacement parts PN 103-0862 –
blade bolt and PN 103-0865 – spring disc washer).
♦
DO NOT lubricate the threads of the bolt or spindle
before assembly.
♦
Torque the blade bolt to 115-120 ft. lbs. (156-163 N-m)
FIGURE 5
BLADE BOLT INSTALLATION
For Serial Nos. 540,000 and Higher:
d)
Re-install the blades (if they were removed) in the following order (See Figure 6):
1) Install bushing through blade with bushing flange on bottom (grass)
side of blade.
2) Install bushing/blade combo into spindle.
3) Install blade bolt and spring disc washer. Be sure the spring disc
washer cone is installed towards the bolt head. Place a block of wood
between front or rear baffles and the blade then torque the blade bolts
to 55-60 ft-lbs. (75-81 N-m).
DO NOT USE WRENCH HERE.
FOR BLADE INSTALLATION MAINTAIN
140-145 ft-lbs. (190-197 N-m) ON THIS NUT
