BEARING 2P3662 - Caterpillar

Speed Control Circuit
Fluid Spillage ContainmentCare must be taken to ensure that fluids are contained during the performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication NENG2500 Caterpillar Tools and Shop Product Guide, for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of fluids according to local regulations and mandates.
Speed Control Schematic
(1) Pilot Line. (2) Pressure Reducing Valve. (3) Main Valve Stem. (4) Check Valve.When pressure is applied to pilot line (1) from the pilot control valve, pressure reducing valve (2) reduces pressure to the pilot cap on the main valve stem (3). The adjustable pressure from valve (2) regulates the amount the main valve stem (3) shifts. The adjustable amount the main valve (3) shifts will control the speed of the hydraulic motion in this circuit. When the pilot control valve is neutralized, pilot oil in the main valve stem cap (3) is dumped through the check valve (4) and back through the pilot control valve.