Complete workshop repair service manual with electrical wiring diagrams for Caterpillar 239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

Caterpillar 239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

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UENR4243 - Disassembly and Assembly (239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders Engine Supplement)
UENR4244 - Specifications (239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders)
UENR4244 - Systems Operation (239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders)
UENR4244 - Testing and Adjusting (239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders)
UENR4245 - Disassembly and Assembly (239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders Machine Systems)
UENR4246 - Disassembly and Assembly (239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders Powertrain)
UENR6683 - Schematic (226D and 232D Skid Steer Loader 239D and 249D Compact Track Loader Hydraulic System).pdf
UENR6684 - Schematic (226D and 232D Skid Steer Loader 239D and 249D Compact Track Loader Electrical System)
UENR6685 - Schematic (226D and 232D Skid Steer Loader 239D and 249D Compact Track Loader Electrical System).pdf

EXCERPT:
Because the rotor is connected to the shaft (7) by splines, the rotor turns the shaft. As the rotor turns, the previously exposed ports are covered and the previously covered ports are exposed. The fully extended piston assembly next passes over an exposed port.
As the piston rollers follow the inner diameter of the rotor housing, the rollers force the piston assembly toward the shaft (7). The hydraulic oil that is in the cavity is forced through the exposed port by the inward motion of the piston assembly. The hydraulic oil then returns to an annular passage. The oil then flows out of the port (13). This oil is the low-pressure loop.
The port (14) provides a case drain for the oil that leaks past the piston assemblies and from the flushing valve (6). The flushing valve is a shuttle type valve that provides a means for the oil to flow to the hydraulic oil cooler. The cooled oil will cool the motor. The flushing valve also provides a means to flush harmful
particles from the motor.
The oil that flows through the flushing valve flows from the low-pressure side of the drive loop. When the oil pressure in the annular passage increases, the oil pressure acts against the spool for flushing valve (6). The oil pressure overcomes the force of the spring . The oil pressure forces the spool to shift. When the spool shifts the spool opens a path to the return manifold for the oil that is in the annular passage.
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Caterpillar 239D and 249D Compact Track Loaders and 226D and 232D Skid Steer Loaders Factory Service & Shop Manual