North Star M1108D Owner's Manual page 16

Before Each Use-Inspection / Maintenance
9. Tires Make sure tires are fully inflated and in good repair if you will be towing the splitter.
See tire sidewall for recommended tire pressure.
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10. Shields / guards Replace all guards and shields after servicing the log splitter.
WARNING:
Do not over-inflate tires. Serious injury can occur if tire explodes.
When seating a bead after repair, do not exceed 30 PSI. Pressures higher than 30 PSI can
cause the tire and wheel to rupture and explode.
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