Dozer hard to start

Hi Guys,
I have a circa 2000 d3 Cat dozer that for years started instantly after turning the key. Just recently it started taking 10 to 15 seconds to fire up.Runs normal from then on but will do the same thing after every shutdown and restart,warm or cold. Someone told me to change filters but a diesel mechanic who I respect for his ability says it's most likely the fuel lift pump. Where is this pump located? Attached to the injector pump I see an electric type pump or motor of some...

Dozer hard to start

Dozer hard to start