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Curtis 1298 Manual, OS 11
Fig. 15 Hydraulic system diagram.
Fig. 16 Alternative hydraulic system, without proportional lowering.
HYDRAULIC OPERATION
The 1298 controls the speed of the pump motor, and also the valves on the Lift
cylinder’s hydraulic line. By so doing, it controls the hydraulic path for Lift and
Lower operations. The hydraulic path for any other hydraulic operations (e.g.,
reach, tilt, sideshift, rotate) is provided by the vehicle manufacturer, with the 1298
controlling the pump motor speed. VCL programming and spare 1298 inputs
and outputs could be used to control the other hydraulic valves.
The standard configuration is shown in Figure 15. In some alternative systems
a simple open/closed lowering valve is used, as shown in Figure 16.
3 — PROGRAMMABLE PARAMETERS: Hydraulic Parameters
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