Jaltest Heavy Equipment Diagnostics - 30+ Manufacturers, Full System Access

Heavy equipment is the backbone of construction, mining, forestry, and infrastructure development. Excavators, bulldozers, wheel loaders, motor graders, articulated haulers, crawler cranes, pavers, milling machines, and mining trucks are high-value machines that generate revenue only when they are running. A single hour of downtime on a mining haul truck can cost $5,000 or more in lost production. Jaltest heavy equipment diagnostics give your technicians OEM-level access to diagnose and repair these machines across 30+ manufacturers without relying on dealer service calls that take days to schedule and cost $200+ per hour.

Modern heavy equipment is fully electronic. A Caterpillar 390F excavator has separate electronic control units for the engine, hydraulic system, machine control, aftertreatment, cab and display, and telematics. A Komatsu PC490LC-11 adds Komtrax telematics, CLSS hydraulic controls, and Komatsu Tier 4 Final aftertreatment. Diagnosing these systems requires manufacturer-specific tools, or Jaltest, which covers all of them in a single platform.

Supported Heavy Equipment Manufacturers

Caterpillar

Jaltest provides diagnostic access to the full Caterpillar construction and mining equipment range. Coverage includes the 300 and 500 Series excavators (320D, 330F, 349F, 390F), D-Series bulldozers (D6, D8, D9, D10, D11), 900 Series wheel loaders (950H, 966M, 980M, 992K), 100 and 200 Series motor graders (140M, 160M), 400 Series backhoe loaders (420F, 430F), and the 700 and 800 Series articulated trucks (730, 740, 745). Access Cat engine ECUs (C7.1, C9.3, C13, C15, C18, C27, C32), hydraulic system controllers, transmission ECUs, machine control modules, and aftertreatment systems. Perform DPF regeneration, injector coding, hydraulic pump calibrations, and transmission clutch calibrations.

Komatsu

Full diagnostic coverage for Komatsu excavators (PC210-8, PC290LC, PC360LC, PC490LC, PC800, PC1250), bulldozers (D37, D51, D61, D65EX, D85, D155, D375), wheel loaders (WA200, WA320-6, WA380, WA470, WA500), motor graders (GD655), articulated haulers (HM300-2, HM400-2), and mining trucks. Jaltest accesses Komatsu SAA6D engines, CLSS hydraulic systems, HST transmissions, Komtrax telematics, and Tier 4 Final aftertreatment systems. Perform forced DPF regenerations (a critical function on Komatsu Tier 4 machines that frequently require manual intervention), injector coding, and hydraulic pump flow calibrations.

Volvo Construction Equipment

Diagnostic access for Volvo CE excavators (EC210B, EC250E, EC300E, EC350E, EC480E, EC750E), wheel loaders (L60H, L90E, L120H, L150H, L220H, L350H), articulated haulers (A25G, A30G, A35G, A40D, A45G, A60H), and pavers (P6820, P7820). Access Volvo TAD and D engine ECUs, I-shift transmission controllers, OptiShift drive systems, hydraulic controllers, Volvo Co-Pilot guidance system, and Tier 4 Final aftertreatment. Volvo CE machines use the same aftertreatment technology as Volvo trucks, and Jaltest provides the same depth of DPF/SCR diagnostic access.

John Deere Construction

Jaltest covers the John Deere construction equipment lineup: excavators (210G, 245G, 345G, 470G, 870G), dozers (450K, 550K, 650K, 700K, 750K, 850J, 1050K), wheel loaders (444K, 544K, 624K, 644K, 844K), motor graders (672G, 772G, 872G), backhoe loaders (310G, 310SL, 410L), and articulated dump trucks (260E, 310E, 370E, 410E, 460E). Access PowerTech and Yanmar engine ECUs, hydrostatic and powershift transmissions, EH hydraulic systems, and Grade Control Ready electronics. John Deere construction shares many engine platforms with their agricultural line, and Jaltest provides consistent diagnostic access across both.

Hitachi

Diagnostic coverage for Hitachi ZX-Series excavators (ZX130, ZX210, ZX250, ZX350, ZX490, ZX670, ZX890) and EX-Series mining excavators. Access Isuzu and Hino engine ECUs, HIOS hydraulic system controllers, ConSite telematics, and aftertreatment systems. Hitachi mining shovels (EX3600, EX5600, EX8000) receive engine and hydraulic diagnostic access for the Cummins and Isuzu power plants used in these machines.

JCB

Full diagnostic support for JCB tracked excavators (JS220, JS300, JS370), backhoe loaders (3CX, 4CX, 5CX), wheel loaders (417ZX, 427ZX, 437ZX, 457ZX), telehandlers (Loadall series), and the JCB Fastrac. Access JCB DieselMax and EcoMAX engines, JCB Smoothride hydraulic systems, Powershift transmissions, and LiveLink telematics. JCB machines use a mix of JCB-proprietary and Tier 4 Cummins engines, and Jaltest covers both.

Liebherr

Diagnostic access for Liebherr excavators (R914, R920, R922, R926, R930, R936, R945, R950, R960, R976), wheel loaders (L506, L509, L514, L524, L538, L546, L556, L566, L576, L586), dozers (PR716, PR726, PR736, PR756, PR776), and mining equipment (R9100, R9150, R9200, R9250, R9350, R9400, R9800, T264, T284). Liebherr manufactures its own diesel engines (D934, D936, D946, D9508, D9512, D9620), and Jaltest provides dedicated diagnostic access to these engines alongside the machine systems.

Doosan

Coverage for Doosan DX-Series excavators (DX140LC, DX225LC, DX300LC, DX350LC, DX420LC, DX530LC, DX800LC), wheel loaders (DL200, DL250, DL300, DL350, DL450, DL550), and articulated dump trucks (DA30, DA40). Access Doosan/Scania engine ECUs, eDoC aftertreatment systems, EPOS hydraulic controls, and DoosanConnect telematics. Doosan compact equipment is covered under the Compact Equipment collection.

Additional Supported Manufacturers

Jaltest heavy equipment coverage extends well beyond the major brands. The following manufacturers are also supported with varying levels of diagnostic depth.

Manufacturer	Equipment Types	Key Models
Bell	Articulated dump trucks	B20E, B25E, B30E, B40E, B45E, B50E
Bomag	Compaction equipment, pavers, milling machines	BW Series rollers, BF pavers, BM milling machines
CNH (Case Construction)	Excavators, dozers, wheel loaders, backhoes	CX-Series excavators, 650-1150 dozers, 521-1021 loaders
Dynapac	Rollers, pavers, planers	CA/CC Series rollers, SD pavers
Grove	Mobile cranes	GRT Series rough terrain, GMK all-terrain, TMS truck-mounted
Hamm	Compaction rollers	H Series, HD Series, DV Series
Hidromek	Excavators, backhoe loaders, wheel loaders	HMK Series excavators and backhoes
Hyundai CE	Excavators, wheel loaders	HX-Series excavators, HL-Series loaders
Kobelco	Excavators, cranes	SK-Series excavators (SK210, SK350, SK500)
Link-Belt	Excavators, cranes	210 X4, 350 X4 excavators; crawler cranes
Liugong	Excavators, wheel loaders, dozers	CLG Series equipment
Manitowoc	Crawler cranes, tower cranes	MLC Series lattice crawlers
New Holland Construction	Excavators, dozers, wheel loaders, backhoes	E-Series excavators, D-Series dozers, W-Series loaders
O&K (Terex)	Mining excavators	RH-Series hydraulic mining shovels
Sany	Excavators, cranes, pavers	SY-Series excavators, SCC/STC cranes
Tadano	Mobile cranes	GR Series rough terrain, GT all-terrain
Terex	Trucks, cranes, material handlers	TA Series ADTs, Demag cranes
Vermeer	Trenchers, horizontal directional drills, grinders	D-Series drills, T-Series trenchers, TG-Series grinders
Wirtgen	Milling machines, cold recyclers, soil stabilizers	W Series milling machines (W100, W200, W210)
XCMG	Excavators, cranes, loaders	XE-Series excavators, QY/QAY cranes
Zoomlion	Cranes, concrete machinery	QY/ZAT Series cranes, concrete pumps

Equipment Types and Diagnostic Functions

Excavators

Excavators are the most commonly serviced heavy equipment type, and Jaltest provides the deepest diagnostic coverage for this category. Access engine management, main hydraulic pump control, swing motor systems, attachment hydraulics, auto-idle and economy mode settings, Tier 4 Final aftertreatment, and machine monitoring/telematics systems.

Common diagnostic tasks: forced DPF regeneration (frequent on excavators that idle heavily), hydraulic pump flow calibration, injector coding, swing brake adjustment verification, and attachment flow and pressure parameter changes.

Bulldozers

Bulldozer diagnostics cover engine management, hydrostatic or powershift transmission systems, track drive motors, blade control electronics (including GPS grade control interfaces), steering systems, and aftertreatment. Perform transmission pressure tests, final drive motor diagnostics, and blade auto-grade calibrations.

Wheel Loaders

Wheel loader diagnostic access includes engine, powershift or hydrostatic transmission, torque converter, hydraulic lift and tilt systems, ride control, auto-lube systems, payload monitoring, and aftertreatment. Transmission clutch calibrations and torque converter lockup adjustments are among the most common diagnostic tasks on wheel loaders.

Motor Graders

Motor grader diagnostics cover engine, all-wheel-drive systems, transmission, circle drive and moldboard positioning, blade slope sensors, GPS grade control interface, and steering articulation systems. Graders have complex mechanical and electronic systems due to the precision required for finish grading work.

Articulated Haulers

Articulated dump truck diagnostics include engine, automatic transmission, retarder systems, differential locks, traction control, suspension systems, body tip controls, and payload monitoring. These machines operate under extreme loads and grades, making drivetrain diagnostics critical for reliability.

Cranes

Crane diagnostics cover engine and drive systems, load moment indicators (LMI), winch controls, boom extension/retraction systems, outrigger sensing, anti-two-block systems, and rated capacity indicators. Crane safety systems are electronically controlled and require diagnostic access for calibration and fault resolution. Coverage includes crawler cranes, rough terrain cranes, all-terrain cranes, and truck-mounted cranes from Grove, Tadano, Manitowoc, Liebherr, Link-Belt, Sany, and Zoomlion.

Pavers and Milling Machines

Asphalt paver diagnostics include engine, drive systems, screed controls (electric and gas-heated), grade and slope sensors, material feed systems, and conveyor/auger controls. Milling machine diagnostics cover drum drive systems, conveyor controls, grade sensing, and the specialized hydraulic systems used to control cutting depth and drum speed. Coverage includes Bomag, Dynapac, Volvo CE (formerly Blaw-Knox), and Wirtgen.

Mining Trucks

Mining haul truck diagnostics cover the large diesel engines (Cat C175, Cummins QSK60/QSK78, MTU Series 4000), electric drive systems (AC or DC), transmission/drive systems, brake systems, suspension monitoring, payload systems, and autonomous haulage interfaces. These machines are among the most expensive to keep running, with hourly operating costs that can exceed $500. Diagnostic access that keeps them moving pays for itself immediately.

The Cost of Dealer Dependence in Heavy Equipment

Heavy equipment dealers provide excellent service, but that service comes at a price and on their schedule, not yours.

Factor	Dealer Service	In-House with Jaltest
Hourly rate	$175 - $300/hour	Your technician's hourly rate
Response time	24 - 72 hours	Immediate
Travel charges	$2 - $5/mile for field service	$0 (your service truck)
DPF regen cost	$300 - $800 per visit	$0 (Jaltest included function)
Brands covered	Usually 1-2 per dealer	30+ with Jaltest

A single DPF regeneration service call from a Cat dealer can cost $300 to $800 when you include travel time, diagnostic time, and the regen itself. If your fleet has 10 Tier 4 machines that each need one forced regen per quarter, that is $12,000 to $32,000 per year in DPF service calls alone. A Jaltest diagnostic kit pays for itself in DPF regens within the first year.

Part of the Jaltest Off-Highway Platform

Heavy equipment diagnostics are one subcategory within the broader Jaltest Off-Highway Vehicle diagnostic platform, which also covers compact equipment, stationary engines, multi-purpose vehicles, and airport equipment. When you purchase a Jaltest off-highway diagnostic kit, you get access to all off-highway subcategories in a single package.

Get the Right Heavy Equipment Diagnostic Kit

Diesel Truck Diagnostic Tools carries the full range of Jaltest off-highway diagnostic packages. Whether you need a complete laptop kit ready to go out of the box or a tool-only kit to run on your existing shop computer, we have the right package for your operation.

Call 800-217-0063 to speak with a trained staff who understands heavy equipment. Tell us what brands and models are in your fleet, and we will verify coverage and recommend the right diagnostic package. Every kit ships with free ground shipping, a full manufacturer warranty, and access to our live support team.

Email: support@dieseltruckdiagnostictools.com | Phone: 800-217-0063 | Monday-Friday, 8:00 AM - 5:00 PM CST

Diesel Truck Diagnostic Tools - authorized Jaltest/Cojali dealer since 2016. Keeping your iron moving.