https://quickserve.cummins.com/info/qsol/promotions/tool_kit.html
With this one kit (P/N 3399869) you will have everything you need to do an oil and oil filter change, a fuel filter change and a valve lash adjustment. All 16 pieces fit neatly into a rugged, custom-designed carrying case for easy transporting.
3/8" Drive Sockets - 10mm, 12mm, 13mm, 14mm, 15mm, 17mm and 19mm general-purpose sockets for tightening and loosening components.
3/8" to 1/2" Socket Adapter - Lets you use the 3/8" ratchet in combination with the barring socket to rotate the flywheel.
6-Inch 3/8" Drive Extension - For loosening or tightening fasteners in difficult locations.
3/8" Ratchet - Flex-head ratchet for hard-to-reach places. Designed to work with the barring socket.
Feeler Gauge Set - This universal feeler gauge set has the Cummins-recommended thickness to check and adjust valves.
14mm and 15mm Combination Wrenches - The 14mm is used to loosen and tighten the valve adjustment screw locknut. The 15mm wrench is used on the valve cover-holding capscrew.
Barring Socket - Special socket designed for rotating the crankshaft while performing a valve adjustment.
Screwdriver - "Stubby" screwdriver holds the adjusting screw while tightening the locknut.
Filter Wrench - Fits most oil filters, as well as many fuel filters.