The general purpose tractor 311 transmission is 2-1/2 - 3" taller than the 310 utility. The axle housings are in the same position on both transmissions as measured from the bottom up.
Both tractors use the same dipstick measuring from the top of the transmission down so the oil level in the 311 has to be about 3 inches higher to reach the full mark on the dipstick. That floods the axle housings accounting for almost double the amount of oil required. The utility 310 axles are not flooded when the oil level is at the full mark on the dipstick. There are grease zerks on the axles to lube the outboard bearing.
The manuals vary capacity for the same tractor in the service and operating manual. The operating manual for 300B 400B even states the capacities backward for the 300B utility & general purpose tractors.
Case manuals are generally pretty accurate in service manuals less so in operator manuals. But all a round very poor in hydraulic and power steering for 300 300B.
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