KIT-HOUSING 1247125 - Caterpillar

Illustration 1 g00628818
Location of the Metering Pump (Steering) (1) Cover (2) Metering pumpThe metering pump (2) is located behind the cover (1). The cover is located in front of the cab.
Illustration 2 g00628824
Location of the Metering Pump (Steering) (2) Metering pump.The steering wheel is connected to the metering pump by a mechanical linkage.
Illustration 3 g00631405
Metering Pump (Steering) (3) Centering springs (4) Outlet to tank (5) Internal check valve (6) Inlet port (7) Passage (8) Passage from gerotor (9) Drive shaft (10) Spool (11) Pin (12) Passage to the left turn port (13) Passage to the right turn port (14) Sleeve (15) Passage to gerotor (16) Gerotor (17) Selector valve (18) Gerotor (A) Control section (B) Metering sectionThe steering metering pump is made up of the following two sections:
Control section (A)
Metering section (B) The two sections are connected by hydraulics and by mechanics. The two sections work together in order to send oil to the steering cylinder.Pump oil goes through inlet (6) into control section (A). When the steering wheel is turned, control section (A) sends oil to metering section (B). Metering section (B) produces a specific amount of oil flow. Metered oil from metering section (B) is then directed by control section (A) to either the passage to the left turn port (12) or the passage to the right turn port (13) .Metering section (B) consists of two small hydraulic motors and a selector valve (18). The hydraulic motors produce a metered amount of oil flow. Then, the metered oil is directed by the control section (A) to the steering cylinder. The direction and the speed are controlled by the metering pump. As the steering wheel is turned faster, there is an increase in the flow of oil from the steering metering pump to the cylinder. The increased flow causes the cylinder to move faster. This turns the machine faster.When the steering wheel is not being turned, control section (A) is in the NEUTRAL position. The metering pump is a closed center valve. This means that there is no alignment between the passages in the spool and the orifices in the sleeve in the NEUTRAL position. Only a small amount of oil flows through the center position. This keeps the spool slightly open and ready to respond quickly to any steering demands.When the steering wheel is turned for a right turn, pump oil flows into the metering pump through inlet (6) and passage (7). Oil flows from passage (7), through passage (15) and into gerotor (16). Oil also flows through the selector valve (17) and into gerotor (18). While the steering wheel is turned, gerotors (16) and (18) turn. The gerotors also pump oil while the steering wheel is turned. The oil flows outward through passage (8). This oil is directed to the steering cylinder through the right turn port.
Illustration 4 g00650149
Spool and Sleeve (10) Spool (11) Pin (14) Sleeve (19) Slots for springs (20) Grooves for oil flow (21) Holes for pin (22) Small holes for oil flowWhen the steering wheel