MacDon 9250 Operator's Manual page 108

Traction Drive: Wheels and Tires (continued)
DRIVE WHEEL BOLTS
At first use, or when a wheel is removed, check
drive wheel bolt torque according to the following
schedule:
• Every 15 minutes on the road or 60 minutes in
the field until torque stabilizes, then
• Daily (10 hours) until no change is recorded for
3 consecutive days (30 hours), then
•
Every 200 hours or annually thereafter.
Torque Specification for drive wheels:
9 Bolt Rim: 130 ft.lbs. (175 N⋅m). Torque in
numbered sequence shown at right. Repeat
sequence three times.
8 Bolt Rim: 180 ft.lbs. (245 N·m). Torque in
numbered sequence shown at right. Repeat
sequence three times.
NOTE: When installing drive tires, be sure air
valves are on the outside and tire tread points
forward.
For "Turf and Field" tires (diamond or rectangular
tread), be sure arrow on sidewall points in forward
rotation.
CASTER WHEEL BOLTS
Check caster wheel bolt torque after the first 5
hours and every 200 hours or annually thereafter.
Torque specification for caster wheels:
9.5L-14: 50 to 60 ft.lbs. (70 to 80 N⋅m)
16.5L-16.1, 11-16 or 7.5-16: 100 ft.lbs. (135 N⋅m)
Whenever a wheel is removed and re-installed,
check torque after one hour of operation.
IMPORTANT: To prevent damage to wheel disc,
do not over-tighten wheel nuts.
Follow the proper bolt tightening sequence shown
at right.
Form # 46584
MAINTENANCE/SERVICE
106
4
1
9
6
9-BOLT WHEEL
TIGHTENING SEQUENCE
1
6
3
8
5
8-BOLT WHEEL
TIGHTENING
6-BOLT WHEEL
TIGHTENING SEQUENCE
7
2
5
8
3
4
7
2
5-BOLT WHEEL
Issue 11/06 Web Rev_01