flow chart illustrating a first embodiment of the method according to the invention performed by the processor unit 5 the method sequence is started at box 7 from where the sequence is transferred to box 8 where initial values are calculated e g in the same manner as previously i e with aid of a relubrication interval chart as described and illustrated with reference to fig1 data measured by the sensors 2 3 and 4 in fig2 are supplied at 9 and are inputted at 10 i e the current values for temperature load and rotational speed to which the different portions of the bearing assemblies are subjected in box 11 a new interval t f is calculated and this new t f value is compared in box 12 with the initial t f value if the new t f value differs from the initial t f value i e falling below the initial t f value the new t f value is introduced after calculation in box 13 as a new current t f value this new current t f value then is supplied to box 14 where a correct amount of lubricant is calculated for the current t f value in the event that the calculated t f value is not smaller than the initial or current t f value the initial or current t f value is supplied directly to the box 14 the current relubrication interval t f and the amount of lubricant required is output from box 15 to a comparison box in 16 where the current time is compared to the value of.