ASE P1 Medium-Heavy Truck Parts Specialist study plan

Build a one-page map of the parts department workflow from counter request through stocking and reorder

Define and practice calculating reorder points, safety stock, and economic order quantity for three sample SKUs

Classify 25 sample part numbers into A/B/C velocity tiers and justify each placement

Draft a physical inventory count procedure including cycle-count frequency by tier

Compare bin-location and locator systems and write the labeling convention you would use

Decode 20 sample OEM and aftermarket part numbers into their component segments (group, subsystem, size, variant)

Explain the difference between supersession, interchange, and direct-fit replacement using three examples

Practice using VMRS-style system/component coding to file 15 sample parts

Identify the major diesel engine systems and list the wear parts and gaskets associated with each

Match 15 engine components to their function and typical failure symptoms

Explain cylinder kit contents and when a rebuild versus an in-frame versus an out-of-frame kit applies

List the identification data needed (serial number, CPL/engine family, emissions tier) before ordering engine parts

Trace power flow through a manual transmission and identify which parts are replaced in a typical overhaul

Compare clutch types and list the measurements a counter person must confirm before selling a clutch kit

Describe differential and driveline component relationships, including ratio identification and yoke/slip-joint sizing

Build a quick-reference table of drivetrain fluids and their specification callouts

Explain air brake system components and the role of each valve from compressor to wheel end

Identify the measurements and specifications required to sell brake shoes, drums, chambers, and slack adjusters correctly

Describe steering gear, linkage, and kingpin components and the inspection points that drive part selection

List wheel-end components including bearings, seals, spindles, and hub assemblies with their fitment variables

Map the starting and charging circuit and identify the parts sold for each failure mode

Explain battery group sizes, cold cranking amp ratings, and terminal configurations used in heavy trucks

Match coolant types and filtration products to engine and emissions requirements

Describe oil and fuel filter selection variables including micron rating, bypass, and water separation

Identify HVAC system components and the refrigerant and compressor specification questions to ask a customer

List common cab and chassis parts categories and the fitment data each requires

Write a scripted return and warranty intake process covering reason codes and restocking decisions

Practice handling three customer scenarios: wrong part, core return, and warranty claim

Re-run missed practice questions from every domain and log the reason for each miss

Complete a timed mixed-domain practice set and score each domain separately

Review the three weakest domains and rebuild the reference sheets for them

Finalize a personal quick-reference binder covering all ten domains