You can decipher that by locating the Bosch p/n on your pump.Bosch VE P/N Example: 0 460 494 001Key to Bosch Part Number:0= Denotes complete product460= Product class, Distributor pump4= Identifier for VE Injection pump9= Plunger Diameter: 8=8mm,9=9mm,0=10mm,1=11mm,2=12mm,3=13mm & 4=14mm4= Number of Cylinders001= Application
Isn't one of the digits the direction of rotation?
It turns out the last three digits of the VP37 marry up to another bosch part number that gives more information. The new code breaks down as follows:VE = VE type pump (VP is still a VE pump)4 = number of cylinders/10 = 10mm plungerE = electronic governor (F=mechanical)xxxx number = governor controlled RPM (I assume this is pump rpm not engine rpm)R = clockwise rotation (L = counter clockwise)xxx-x number = production number