Model Spotlight

John Deere 345 P-Tier Excavator: Modern 34.5-Ton P-Tier Construction Machine

The John Deere 345 P-Tier is a modern 34.5-ton class construction excavator built on the JD/Hitachi shared platform with Tier 4 Final emissions, a refined operator station, and current-generation hydraulic management. It sits between the 300 P-Tier and 350 P-Tier in the JD P-Tier excavator lineup.

Broken Tractor Editorial Team• Updated May 2026• 8 min read

Where the 345 P-Tier fits in the JD excavator line

The 345 P-Tier sits between the 300 P-Tier and 350 P-Tier in the modern John Deere P-Tier construction excavator lineup. It is a 34.5-ton class machine built on the JD/Hitachi shared platform, which keeps service-part availability strong because many components carry across multiple JD and Hitachi excavator models in the same weight class.

P-Tier is JD’s current production designation for the modern, Tier 4 Final emissions generation of construction equipment. On the 345 P-Tier that means a refined diesel engine, full aftertreatment (DPF + SCR with DEF), a modernized cab, and current-generation electronic hydraulic controls.

JD 345 P-Tier Excavator - Quick Specs

Class: 34.5-Ton Excavator
Generation: P-Tier (current production)
Engine: Tier 4 Final Diesel
Aftertreatment: DPF + SCR (DEF)
Drive: Hydrostatic, Steel Track Undercarriage
Platform: JD / Hitachi Shared
Smaller Sibling: JD 300 P-Tier
Larger Sibling: JD 350 P-Tier

Locating your serial number On the John Deere 345 P-Tier the serial number plate is mounted on the upper frame near the cab entry, typically on the right-hand side beneath the door threshold or beside the operator’s seat. Always verify the serial number before ordering parts to ensure proper fitment - the P-Tier generation has seen running changes through production.

Engine, hydraulics, and undercarriage

The 345 P-Tier runs a Tier 4 Final diesel through a hydrostatic drive into a steel-track undercarriage. The aftertreatment package includes a diesel particulate filter (DPF) for particulate control and an SCR catalyst with DEF dosing for NOx control - standard for the Tier 4 Final emissions tier.

The implement hydraulic circuit drives the boom, arm, bucket, and swing functions through current-generation electronic hydraulic control. The AT317252 cross-pin is the broad JD excavator family service pin that fits across the JD P-Tier and G-Tier construction line (180CW, 190DW, 200, 200C, 200G, 210G, 225C, 230GW, 2054, 180G, 190GW, 210P, 220DW, 225D, 245G, 2154D and more).

Common service items on the 345 P-Tier

Engine: Tier 4 Final diesel internals - pistons, rings, sleeves, bearings, gaskets.
Aftertreatment: DPF service, DEF dosing units, NOx sensors, SCR catalyst.
Cooling: Radiator, water pump, hydraulic oil cooler, heat exchanger, hoses.
Hydraulics: Main pump, control valve, swing motor, travel motors, boom/arm/bucket cylinders.
Boom pins: AT317252 cross-pin (broad JD family fit).
Undercarriage: Steel tracks, shoes, idlers, rollers, sprockets, idler springs.
Cab and electrical: Cab glass, alternator, starter, sensors, harnesses, ECU, monitor display.

Tier 4 Final aftertreatment - service implications The 345 P-Tier’s DPF and SCR systems are reliable when fed clean fuel and quality DEF, but they require attention. DEF tank must stay topped up. DPF will request periodic high-temperature regenerations. NOx sensors fail occasionally and trigger derate conditions if not replaced. Build aftertreatment service into the maintenance budget on any production P-Tier machine.

Parts we carry for the John Deere 345 P-Tier

Category	Common Parts	Browse
Engine	Tier 4 Final diesel internals, gaskets, bearings	Browse Engine Parts
Aftertreatment	DPF, DEF dosing, SCR catalyst, NOx sensors	Browse Aftertreatment
Cooling	Radiator, water pump, oil cooler, hoses	Browse Cooling
Hydraulics	Main pump, control valve, motors, cylinders	Browse Hydraulics
Boom Pins	AT317252 cross-pin (broad JD family)	AT317252 Cross-Pin
Undercarriage	Steel tracks, shoes, idlers, rollers, sprockets	Browse Undercarriage
Cab / Electrical	Cab glass, alternator, starter, ECU, harnesses	Browse Cab / Electrical

Need a part for your John Deere 345 P-Tier Excavator?

Aftertreatment components, hydraulic pumps, and boom pins are the highest-value items on a 345 P-Tier. Call our parts team with your serial number and we’ll match the right component to your machine.

Request a Part

What to verify before ordering

Serial number. Confirm the serial on the upper frame before ordering year-specific parts - the P-Tier generation has seen running changes.
Engine and aftertreatment serial. Tier 4 Final emissions parts are serial-specific. Match against the engine and aftertreatment serial tags.
Aftertreatment generation. DPF and SCR revisions have running changes through the production run.
Boom-pin position. AT317252 fits a broad JD family but the boom, arm, and bucket positions each have specific cross-pin part numbers - confirm position before ordering.
Hydraulic pump generation. Main pump revisions have running changes - match against the pump tag.

Why the 345 P-Tier still earns a paycheck

The 345 P-Tier stays in service because modern 34.5-ton JD excavators deliver Tier 4 Final fuel efficiency and operator-station refinements that contractors rely on for production work. JD/Hitachi platform parts sharing means service parts are widely available across the dealer network and aftermarket.

Maintenance priorities on a 345 P-Tier: clean fuel and quality DEF (Tier 4 Final common-rail injectors and SCR catalysts don’t tolerate contamination), aftertreatment service discipline, hydraulic oil cleanliness, boom-pin service (AT317252 cross-fit covers most positions), undercarriage replacement on schedule, and cab and electrical service. Broken Tractor maintains JD P-Tier construction coverage.