Farm Equipment Maintenance

Set the parking brake, lower implements to the ground, shut off the engine, and remove the key. Chock wheels on both sides before working under or near hydraulics.

Confirm the PTO master shield, driveline shield, and tumble guard rotate freely and are not cracked or missing fasteners. Missing PTO guards are a top fatality category in ag and a frequent OSHA citation under 29 CFR 1928.57.

Inspect the rollover protective structure for weld cracks, bent tubing, or unauthorized drilling. Verify the seat belt webbing, retractor, and anchor bolts. A compromised ROPS does not protect in an upset.

Pull the dipstick on level ground with the engine cold. Top up DEF only with ISO 22241-grade fluid; contaminated DEF will derate the engine and trigger SCR fault codes that take a dealer scan tool to clear.

Check hydraulic reservoir at operating temperature with implements lowered. Use the OEM-spec fluid (Hy-Gard, Hytran, etc.) — mixing brands can foam and degrade pump life.

Replace per OEM interval or sooner if hours warrant. Pre-fill the fuel filter with clean diesel before installing to avoid air-locking the high-pressure common rail and shorten priming time.

Walk the unit with the operator's manual lube chart. Driveline U-joints, three-point hitch pivots, loader pins, and steering cylinder pins are commonly missed. Wipe each fitting before pumping.

Pull a hot, mid-stream engine and hydraulic sample to a lab (Polaris, Cat S·O·S, or dealer program). Trending iron, copper, and silicon catches bearing wear and intake leaks before they cost a long block.

Load test each battery individually — a parallel pair will mask one weak unit. Wire-brush terminals, apply dielectric grease, and torque clamps. Corroded grounds cause intermittent monitor faults that look like display failures.

Pay attention to harnesses crossing exhaust, near steering knuckles, and along loader frames. Rodent damage in winter storage is the most common cause of springtime no-start and ISOBUS faults.

Verify headlights, work lights, turn signals, brake lights, amber flashers, and rotating beacon. Replace faded SMV (slow-moving vehicle) emblems — DOT requires a fluorescent and reflective emblem visible from 500 feet.

Connect Service ADVISOR, EDT, or AGCO EDT and read active and stored DTCs. Document any SCR/DEF, fuel-rail, or CAN-bus codes for the dealer before they escalate to a derate.

Book the dealer scan and quote before the unit ships to the field. In-season service slots fill fast — getting on the schedule now beats a planter-pause callout in May.

Drain water from the primary separator before bleeding the system. Water in Tier 4 high-pressure common rail injectors is a $4,000 to $8,000 mistake — never let the bowl fill past the sensor mark.

Replace the primary if the restriction indicator is in the red or hours warrant. Never blow out the secondary filter — replace it on the OEM schedule. Inspect intake clamps from turbo to manifold for boost leaks.

Check DEF quality with a refractometer (target 32.5% urea). Crystallized DEF around the doser is normal in small amounts; heavy build indicates a leaking injector or failed heater.

Use compressed air from the fan side outward to push chaff and pollen back the way it came in. Stacked coolers (rad, CAC, hydraulic, AC) trap debris between layers — swing them apart per the OEM service position.

Pressure test to cap rating; pinhole leaks at the lower hose and freeze plugs are common. Test the cap separately — a weak cap will boil over under load even with a healthy system.

Use coolant test strips for freeze point and supplemental coolant additive (SCA) level. Diesel engines without correct SCA suffer wet-sleeve cavitation that pits the liners and fails the head gasket.

Set pressure for the implement load and ground speed using the tire manufacturer's load/inflation chart (Firestone, Mitas, Trelleborg). Over-inflated radials compact the seedbed and cost yield — a common but invisible mistake.

Check lower-link arms, top link, lift links, sway blocks, and drawbar pin for wear and elongated holes. A worn drawbar pin under heavy implement load is a roadside breakdown waiting to happen.

On planters and combines, spin every meter and shaft by hand listening for rough bearings. Replace stretched roller chains rather than just adding links — a worn chain on a new sprocket destroys both.

Run TCM (terrain compensation), steering, and SF/RTK calibration after any tire change or front-axle service. Skipping TCM after a wheel-weight change shows up as A-B line drift at planting.

Bring the engine to full operating temperature and exercise hydraulics, PTO, and all gear ranges. Recheck for leaks while warm — many seal weeps only show up at temperature.

Log all parts and fluids by part number into Operations Center, Fleetio, or your shop binder. Resale value and warranty claims both depend on a documented service history.

Hang a red out-of-service tag on the steering wheel, lock the cab, and notify the farm manager and dispatcher. Move the unit off the equipment line so an operator does not grab it for an early-morning run.