in my opinion , k2 ^$ a- f3 K
1.the noise is coming from the gears .the engine oil lubricating the gear is not enough * O/ F8 [9 C% e1 w! ?. t1 D$ O- @ g, i( V5 `/ W" l X
2.the loadmatch of the Engine and the Pump is bad or the fuel filter has big resistance