Tailgate Cylinder - Test
The following test will determine if the seals in the tailgate cylinder are good.
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| NOTICE |
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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 opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
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| Illustration 1 | g00634829 |
Location of the tailgate cylinder | |
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| Illustration 2 | g00503888 |
Tailgate cylinder (1) Rod end line | |
- Make sure that the following conditions exist:
- The engine is off.
- The hydraulic pressure is zero.
- The dump body is fully lowered.
- The tailgate is secured so that the tailgate cannot open.
- The engine is off.
- Disconnect the rod end line (1) of the tailgate cylinder and cap the line. Attach a length of tubing to the cylinder rod end port (1) and direct the other end into a suitable container.
Note: Some oil may discharge from the connection. Allow the oil to drain before performing the test.
- Start the engine and run the engine at low idle.
- Instruct an assistant to hold the hoist control in the lower position. This will force the tailgate into the dump body.
- Look for a continuous discharge of oil from the tubing. This would indicate a leak in the piston seal. Also check for leaks at the rod seal.
- Place the hoist control in the float position and stop the engine. Remove the test equipment.
If there is a leak, rebuild the tailgate cylinder. See Disassembly and Assembly, SENR9129, "Tailgate Cylinder - Remove".
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