Perkins 5006A-E23TA Operation And Maintenance Manual page 40

40 M0122761
Operation Section
Cold Weather Starting
Air filters to pull in air from inside the canopy or
enclosure, not outside the canopy or enclosure.
Fully charged batteries of the correct capacity.
Electrical cables that meet the recommended
specification.
Contact your Perkins distributor or Perkins dealer for
more information.