MacDon M105 Operator's Manual page 320

Measure tire pressure annually with a gauge. Caster tire pressure should be 10 psi (69 kPa).
To maintain pressure, visually check daily that tires have not lost pressure, and adjust pressure as needed.
Under-inflation of tires can cause side wall cracks.
NOTE:
If caster wheels shimmy, a possible cause is over-inflation.
NOTE:
An anti-shimmy dampener kit is available for rear caster wheels. Refer to
for information.
page 337
Table 5.20 Caster Tire Options
Formed Caster
7.5 – 16SL Single Rib, 10 - 16 Front Steer Tire
10 psi (69 kPa)
Tightening Caster Wheel Nuts
At first use, or when a wheel is removed, check caster wheel bolt torque as follows after 5 hours, and then at 200
hour intervals:
NOTE:
To avoid damage to wheel rims, do NOT over-tighten wheel nuts.
169890
MAINTENANCE AND SERVICING
306
7.1.2 Anti-Shimmy Shocks for Casters,
Forked Caster
16.5L – 16.1 Rib Implement Flotation, 10 –
16 Front Steer Tire
10 psi (69 kPa)
Revision A