Got the service manual. Here is what is says:
OIL PAN REMOVAL
NOTE: The oil pan can be removed with the engine in·
stalled in the tractor.
1. Drain the engine oil and remove the oil level in-
dicator.
2. Support the front transmission.
3. Remove the hood.
4. Disconnect the radi ator shell support, slacken
the engine to front support bolts leaving the nuts
flush or partly disengaged from the end of the
bolts.
5. Ease the front support and radiator assembly for-
ward to allow the front oil pan bolts and the pan
to be removed.
,NOTE: Using this procedure it should not be
necessary to disconnect the radiator hoses,
power steering or hydraulic oil cooler tubes
where fitted. However, care must be taken to be
sure no components are unduly stressed.