Komatsu WA200-6 to WA250-6 specifications

WA200-6: reduced traction can be a selected operating condition

Komatsu's WA200-6 brochure separates travel-speed selection from traction control. The hydrostatic drive changes its motor arrangement as demand changes, while the variable shift setting limits travel speed for the application. A loader being slow in a selected range has not, by that observation, demonstrated an HST failure.

S-mode reduces tractive effort for slippery surfaces and is effective in forward travel. The maximum-traction switch temporarily overrides the selected restriction; operating the direction lever restores the setting. Record the range, traction mode and direction when describing a machine that behaves differently after reversing.

The WA200-6 cooling description also separates a manually reversed hydraulic fan from the optional automatic-reversing arrangement. A reverse-fan switch does not prove the automatic option is fitted. The monitor can retain trouble data and display oil/filter replacement notices; a service reminder and an active abnormality are different kinds of information to preserve in an inspection record.

WA250-6 switch labels and no-move checks need their manual's scope

The North American WA250-6 manual CEAM000503 covers serial A76001 and above. It explicitly marks the shift-hold pilot lamp as unused. A printed icon in the monitor layout therefore does not establish a missing shift-hold function or a failed lamp on this edition.

Its directional-selector lamp concerns enabling direction selection at the work-equipment lever, rather than simply confirming that the machine is in forward or reverse. Those positions have their own indication. Note which lamp is involved when preparing an electrical enquiry.

For an engine-running/no-movement complaint, the manual distinguishes the parking brake, direction selection, the electrical supply to the directional control and the hydraulic oil level. These are preliminary possibilities, not proof that an HST motor needs replacement. Follow the serial-matched manual's safe inspection procedure before any powered test.

The WA200PT-5 and WA250-5L columns remain historical records in this comparison. Neither the newer WA200-6 brochure nor the serial-specific WA250-6 manual certifies their switch behavior or installed equipment. Keep the suffix and serial number with any quoted operating instruction.