Here are instructions on removing the intake manifold and the glow plugs. I found them very helpful -- especially the intake manifold.

PeachPartsWiki: LightMan's Step by Step Glowplug change

Make sure your battery is fully charged before you take the fuel lines off. You have to crank the starter for a minute or more to get the fuel back into the lines. Do that in 20 second intervals, with 10 minutes or so between each interval, to prevent the starter from overheating.

Fill the canister fuel filter with diesel fuel just before you put it in place. That cuts down on cranking time. Also put diesel in the tube where you will insert the pre-filter. Don't forget the o ring for the pre-filter.