COVER 2031878 - Caterpillar

Table 1
Required Tools    
Tool    Part Number    Part Description    
A     4C-4892     ORFS Fittings Group    
4C-9910 Flow Meter
48200 kPa (7000 psi)
13 L/min to 473 L/min (4 US gpm to 125 US gpm)    
At operating temperature, the hydraulic oil is hot and under pressure. Hot oils can cause burns.To prevent possible personal injury, release the pressure in the implement hydraulic circuit (boom, stick, bucket, and swing), travel circuits, and the hydraulic oil tank at the filler cap before any hydraulic lines or components are disconnected or removed.Remove the filler cap only when the engine is stopped and the filler cap is cool enough to touch.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before operating any compartment or disassembling any component containing fluids.After collecting all fluids in suitable containers, dispose of all fluids according to local regulations and mandates.
Illustration 1 g01025151
Typical example (1) Fitting for rotating to the right (2) Fitting for rotating to the left
Disconnect the hose assembly from fitting (1).
Install Tooling (A) in either direction between the hose assembly and fitting (1) .
Start the host machine. Run the host machine at high idle and operate the implements until the hydraulic oil reaches normal operating temperature.
Rotate the work tool. Ensure that the direction of the rotation corresponds with the direction of flow of Tooling (A). Record the reading on the flow meter. Maximum flow is 40 5 L/min (10.6 1.3 US gpm).
Remove Tooling (A) from the work tool.
Ensure that the O-ring seals are properly positioned and connect the hose assembly to the coupling on fitting (1) .
Disconnect the hose assembly from fitting (2) .
Install Tooling (A) in either direction between the hose assembly and fitting (2) .
Start the host machine.
Rotate the work tool. Ensure that the direction of the rotation corresponds with the direction of flow of Tooling (A). Record the reading on the flow meter. Maximum flow is 40 5 L/min (10.6 1.3 US gpm).
Remove Tooling (A) from the work tool.
Ensure that the O-ring seals are properly positioned and connect the hose assembly to the coupling on fitting (2) .
Refer to the list below for the corresponding results to the test:
If the flow was within the specification and the cycle times were not within the specification in either direction, the seals in the motor may be faulty. Check the gerotor motor for internal leakage. Refer to Service Manual, "Gerotor Motor Leakage - Test".
The air must be purged from the work tool before the tool is returned to operation. Refer to Service Manual, "Hydraulic System Air - Purge" for the proper procedure.