2008 Arctic Cat DVX 400 ATV Service Manual, Page 54Get this manual
3Measure the free length of the springsIf any spring free length is less than 10.3 mm (0.41 in, replace all four springs SP211A
NOTE: Do not attempt to disassemble the oil pump housing assemblyIt is serviceable only as complete unit
ATV2166
2Apply engine oil to the mating surfaces of the inner and outer rotors; then align the groove (5) of the inner rotor with the pin (4) of the shaft and install the inner rotor3Install the outer rotor
4Assemble the balancer driven gear noting the position of the two pins (A) and alignment of the two punch marks