VT-30, VT-40, VT-50 and VT-60 Multi-Processors Swivel Leakage

Swivel Leakage - Test

VT-30, VT-40, VT-50 and VT-60 Multi-Processors [RENR4471]

VT-30, VT-40, VT-50 and VT-60 Multi-Processors Swivel Leakage - Test

VT-30, VT-40, VT-50 and VT-60 Multi-Processors Host Machine Pressure and Flow - Test

WORK TOOLS

SWIVEL GP

VT-30, VT-40, VT-50 and VT-60 Multi-Processors Swivel

VT-30, VT-40, VT-50 and VT-60 Multi-Processors Swivel Leakage - Test

MP15, MP20, MP30 and MP40 Multi-Processors Swivel - Remove

MP15, MP20, MP30 and MP40 Multi-Processors Swivel - Install

MP15, MP20, MP30 and MP40 Multi-Processors Swivel - Remove

MP15, MP20, MP30 and MP40 Multi-Processors Swivel - Install

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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 work tool 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.

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Dispose of all fluids according to local regulations.

Close the jaws of the work tool. Place the work tool on the ground and shut off the engine on the host machine. Close the ball valves on the host machine in order to prevent excess oil to the work tool.

Inspect the area around the swivel for exterior leakage. If evidence of external leakage from the swivel is present, replace the seals in the swivel. Refer to Service Manual, "Swivel - Disassemble".

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Illustration 1	g02129215

Remove the bolts and the washers that secure cover (1) to the lower housing. Remove the cover. Repeat this step for the other side of the work tool.

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Illustration 2	g01896736

Remove the eight bolts and the washers that secure two flanges (2) to the cylinder. Install cover plates and half flanges to each port on the cylinder and to each flange (2). The two flanges must be completely sealed in order to check the swivel for leakage. The pressure for this circuit is 35000 ± 2500 kPa (5075 ± 360 psi).

Disconnect hose assembly (3) from the ball valve on the stick. Place the open end of the hose in a suitable container.

Start the engine of the host machine and operate the machine until the hydraulic oil reaches normal operating temperature.

Open the ball valve that is still connected to the work tool. Activate the control that closes the jaws. Observe the open end of hose (3). If there is flow through the hose, the seals of the swivel are faulty. Replace the seals in the swivel. Refer to Service Manual, "Swivel - Disassemble". If there was no flow through the swivel and no external leakage was present, the seals of the swivel do not need to be replaced.
Note: If the cylinder cycle times were not within the specifications and the seals in the swivel are sealing properly, the cylinder may be leaking internally.