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Yes, the standard contents of a tractor cab a

Dog (optional)
Thermos and sandwiches (optionally half-eaten by the dog)
Driver with wellies on feet
A hammer (for where the wellies won't do)
Baler twine
Wire (for where baler twine won't do)
Spare locking pins and clips (if you're lucky)
An adjustable spanner (if you're lucky)

A number of well read copies of the Sun newspaper.

--
Bill