Cooling and lubrication are what keep an engine alive, and their warnings mean stop now — a temperature or oil-pressure warning ignored for even a short time destroys an engine. In ag, the cooling system has a specific enemy that shop-only techs miss: chaff and dust packing the coolers solid. Temp and oil warnings mean…
Hydraulics run nearly everything on modern equipment, and the system rewards methodical diagnosis and punishes two things brutally: contamination, and casual respect for pressure. Most hydraulic problems are diagnosed with a gauge and a flow meter against the schematic — not by swapping the pump. Diagnose pressure and flow, don’t swap the pump Hydraulic complaints…
A transmission problem is one of the most expensive things a customer can face and one of the most commonly misdiagnosed, because modern powershift, CVT/IVT, and hydrostatic transmissions are electronically controlled — and a large share of “transmission” problems are fluid, sensor, calibration, or software, fixable for a fraction of a rebuild. Tearing into one…
Modern ag equipment is a rolling network of electronics, and electrical faults intimidate techs into guessing or parts-swapping. But electrical diagnosis is methodical with a meter and a diagram, and in ag’s dirty, wet, vibrating world the fault is overwhelmingly a bad ground, a corroded connector, or a broken wire — not the expensive component…
“It won’t start” is one of the most common calls and one of the most commonly misdiagnosed — batteries and starters get replaced that were fine, because the real fault was a corroded terminal or bad ground that costs nothing. The starting system is simple to diagnose in order, and testing instead of guessing finds…
Cab climate looks like a comfort feature and isn’t: the cab’s filtration and pressurization protect the operator’s health — critically during chemical application — and A/C service involves refrigerant that’s federally regulated to recover, never vent. Treating it as trivial overlooks a health-and-safety system and risks an environmental violation. Cab air protects the operator An…
These are safety-critical, and on a machine weighing many tons on the road a failure isn’t an inconvenience — it’s a potential fatality. They tend to get neglected until they fail, and shortcutting them, or returning a machine with a known problem, puts lives at risk. This is where the repair gets followed exactly and…
The most expensive wear items on the machine and the ones that put people in the hospital. Two things stay front of mind: the energy in an inflated ag tire will kill you, and inflation pressure and undercarriage wear are money decisions read off tables and gauges, not judged by eye. The energy is lethal…
Hot work in a shop full of fuel, hydraulic oil, tires, and sealed vessels, joining parts that sometimes hold a life. The skill is only half of it; the other half is what you clear before the arc, what metal you’re actually on, when a part gets replaced instead of welded, and keeping the current…
A current machine is a network: sensors feed data to several ECUs, the ECUs command actuators, and everything talks over a CAN bus (J1939 on the machine, ISOBUS 11783 out to implements). Diagnosis follows the architecture — a fault lives somewhere in that network, and knowing the structure tells you where to look and what…
