Case Uni-loader 1845c Operators Operator Manual Maintenance
Manual Table of Content:
General
Engines
Fuel System
Electrical
Power Train
Brakes
Hydraulics
Mounted Equipment
Manual Extract: Cooling Oil Mechanism
Lubricating and return 0il flows directly from the closed loop circuit to the oil cooler. This oil is replaced by cooler oil from the charging section of the dual gear pump. This movement of oil is important to the correct cooling of the piston pumps. Since the Case 1835 Uni-Loader the lubricating and return oil comes from passages in the pistons and from leakage, the amount of oil which flows is controlled by the oil pressure within the rotating group. In some conditions, such as travel under light load for extended periods, oil pressure within the rotating group is low in relation to speed of the piston pumps. Under such conditions, the amount of oil being replaced by cooler oil can be too small to keep the position pumps cool. For this reason, the piston pumps on this machine include a cooling oil mechanism.
A cooling oil mechanism is in the backplate of each piston pump. The parts include a spool, a poppet, two springs, and passages drilled in the back plate. A fitting in each backplate is connected to the lines from the charging section of the dual gear pump. When the engine is running, charging pressure holds the spool in a position which opens a passage between the rotating group and the poppet.
When oil pressure within the rotating group is high, the poppet is held against a seat, and the oil from the rotating group cannot flow through the passage. In this condition, there is enough oil from normal leakage to give cooling. If the oil pressure within the rotating group is low, the spring pushes the poppet off the seat. Oil from the rotating group can low through the seat, into the pump housing, and back to the oil cooler. This oil is then replaced by cooler oil from the charging section of the dual gear pump.
Over the years, the Case 1840 and 1845C Uni-Loader skid steers have earned a reputation as dependable, hardworking power sources. Day in and day out, these sturdy units tackle the toughest assignments, thanks to their impressive horsepower, load capacity, hydrostatic drive and hydraulic systems, and structural integrity. In addition, they are equipped with low-effort, highly responsive controls and can be rapidly transformed for various jobs that used to require countless laborious man-hours.
The 1840 and 1845C are ideally suited f r numerous applications – compatibility with a long list of quick coupling attachments makes them attractive to a wide range of markets. These versatile skid steers can be snowplows, material handlers, mini-excavators, sweepers and more, while their agility and com act stature allow them to easily maneuver in tight areas unsuitable for larger equipment.
These labor and time-saving skid steers will consistently prove their worth to any production-oriented business from building contractors to grain companies, foundries to livestock farms, quarries to landscapers.
