When checking the level of transmission fluid in your machine, it is important to note that the temperature of the transmission can impact your reading. Certain JLG® telehandler models are equipped with a ZF TSC Transmission which contains a thermal bypass valve in the cooling circuit to facilitate faster warm-up of the transmission. If this valve is not warmed to operating temperature it may be fully or partially closed, limiting the amount of fluid available to the transmission. A closed or restricted thermal bypass valve can impact the measurement of transmission fluid. As such, checking transmission fluid levels should always be done when the machine is at operating temperature assuring the valve is fully open.
For more tips on checking transmission fluid levels, download the Transmission Fluid Level Check Procedure Guide
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Please contact your Regional Service Manager or a JLG® service representative if further information is required.
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