Pre-season hydraulic checks can help New Zealand growers and contractors identify contamination, worn components and other problems before machinery is needed in the field.
Planting season puts a premium on machinery availability. For New Zealand growers and contractors working within tight seasonal windows, a hydraulic problem that keeps equipment out of the paddock can quickly create delays across the wider operation.
Many of those problems can begin well before the machine is put back to work.
Thales Leme, NZ Manager – Fluid Control Systems at Motion, says machinery coming out of winter storage can present a number of hydraulic risks, particularly where moisture, contamination and ageing components have gone unnoticed.
Condensation can build inside reservoirs during damp storage conditions, introducing water into hydraulic oil. One of the clearest warning signs is cloudy or milky fluid, which can indicate moisture contamination and the potential for corrosion inside valves and other hydraulic components.
Particle contamination presents another risk. Dust, soil and metallic debris can enter through unsecured fittings or degraded breathers and circulate through the system once the machine is operating.
Thales describes this contamination as acting “like liquid sandpaper under pressure”, with the potential to score cylinder walls, damage pumps and seals, and affect the tight internal clearances of control valves.
Fluid can also deteriorate while equipment sits idle. Oxidation may leave varnish and sludge deposits inside the system, while seals can dry out, harden or crack before being exposed to operating pressure again.
Read the warning signs early
A pre-season inspection gives operators an opportunity to identify these issues before they turn into downtime.
Beyond fluid condition, sluggish controls, jerky cylinder movement or sudden pressure drops can indicate contamination, valve problems or internal component wear.
Hoses should also be checked carefully before planting begins. Swelling, cracking or exposed wire reinforcement can indicate that a high-pressure hose assembly is approaching failure.
Cylinder rods can provide another clue. A thin film of oil that begins attracting dust may point to a weeping rod seal.
Operators should also pay attention to how machinery sounds when it first starts. A high-pitched whining or metallic knocking sound can indicate pump cavitation and air becoming trapped in the oil.
These warning signs are easier to address in the workshop than during a narrow planting window.
Filters, cylinder seals, hose assemblies and quick-connect couplings are among the components that deserve particular attention during pre-season servicing.
Pressure and return filter elements can help remove contamination accumulated during storage, while worn seals and aged or sun-damaged hoses should be addressed before equipment is placed under sustained load.
Corroded, leaking or loose-fitting quick-connect couplings should also be replaced to help maintain clean, secure hydraulic connections.
Support before the season starts
Motion can work with growers and contractors before planting to help identify potential hydraulic issues and prepare machinery for the season ahead.
This can include on-site machinery reviews and visual inspections, supported by specialist knowledge across hoses, seals, bearings and power transmission.
Motion’s sourcing network can also help customers access hydraulic filters and components when replacements are required, giving operators another option when seasonal deadlines leave little room for extended delays.
For agricultural operators, the value of this preparation comes back to keeping machinery available when conditions are right to work.
Checking fluid condition, inspecting high-wear components and responding to early warning signs before planting begins can help reduce the chance of a hydraulic issue interrupting the season.
TAGS:
hydraulics, agricultural machinery, planting season, hydraulic maintenance, hydraulic contamination, hydraulic hoses, hydraulic filtration, equipment reliability
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