KOMATSU 56B-20-13900 OE Part

Name: KOMATSU 56B-20-13900 OE Part
Brand: PTC Drivelines
SKU: KOMATSU 56B-20-13900

Product Description

PTC 2230 is manufactured as a cross-reference replacement for Komatsu 56B-20-13900, connecting the transmission output to the hitch coupling on articulated dump trucks used in mining and quarry operations. This driveline segment sits close to the articulation point, so the tube is built from high-tensile alloy steel sized to match OEM diameter and wall thickness while accommodating the steering-induced angular movement between the front and rear frame sections. Forged yoke ends are machined for precise spline engagement, keeping transmission-to-hitch alignment consistent under load.

Dynamic balancing is carried out on every unit before dispatch, minimising vibration transfer through this shorter, high-stress driveline segment and reducing wear on adjacent transmission bearings. Paired with sealed, self-lubricated spider joints at each end, PTC 2230 helps extend the interval between manual greasing during regular servicing. Produced under ISO 9001:2015 quality processes and dimensionally checked against OEM 56B-20-13900, this shaft is designed as a direct, workshop-ready replacement for the trans-to-hitch driveline position (Komatsu HM400-2R).

Technical Specifications

Parameter	Details
OEM Part Number	56B-20-13900
PTC Part Number	PTC 2230
Product Type	Driveshaft (Propeller Shaft Assembly)
Position / Location	Transmission to Hitch
Joint Series Classification	10C / 12C Series (Medium-Heavy Duty)
Spider / Cross Material	Forged Alloy Steel (Case Carburizing Grade)
Bearing Type	Needle Roller Bearing with Self-Locked Bearing Cup
Sealing System	Three-Stage Labyrinth + Lip Seal
Lubrication	Self-Lubricated / Maintenance-Free
Maximum Articulation Angle	Up to 9°
Dynamic Balancing	Factory Balanced to OEM Tolerance
Surface Finish	Precision Ground, Ra ≤ 0.8 µm
Heat Treatment	Case Hardened, 56–60 HRC Surface
Application	Komatsu HM400 Series Articulated Dump Truck – Trans-to-Hitch Driveline
Operating Environment	Off-Highway Mining, Quarry & Construction Equipment
Temperature Range	-20°C to +120°C
Grease Type	EP Lithium Complex / OEM-Equivalent
Weight (Approx.)	8.6 kg

Frequently Asked Questions

Why does this driveshaft have a higher articulation angle than standard axle shafts?

It sits near the truck's articulation hitch, where the frame pivots during steering. PTC 2230 is built to handle up to 9° of angular movement, more than typical fixed-axle driveshafts, since it must accommodate constant directional changes without placing excess strain on the spider joints.

What maintenance checks help extend the life of a trans-to-hitch driveshaft?

Because this position sees frequent flexing during turns, checking spider joint play and seal condition more regularly than fixed driveline sections is advisable. Catching early wear here prevents it from transferring stress to the transmission output shaft or the hitch coupling assembly.

How is PTC 2230 different from adapting a standard straight driveshaft to this position?

A standard straight shaft isn't designed for the higher articulation angles this location demands. PTC 2230 is engineered specifically with joint geometry and spider angle tolerance suited to the trans-to-hitch section, unlike repurposed shafts that may bind or wear prematurely under steering load.

Does the increased articulation angle affect how often lubrication needs checking?

The self-lubricated, sealed design still minimizes routine greasing needs, but higher articulation naturally puts more cyclical stress on seals over time. A periodic visual inspection of seal integrity during scheduled service is a reasonable precaution given this shaft's more demanding operating angle.

Which Komatsu equipment requires the PTC 2230 trans-to-hitch driveshaft?

This part is designed for the transmission-to-hitch driveline segment on Komatsu HM400 series articulated dump trucks matching OEM 56B-20-13900. Confirm your machine's exact configuration before ordering, as articulated trucks often use different shaft lengths across various driveline segments near the hitch point.