This test will show the following conditions if the conditions exist:
- Oil pressure to the transmission lubrication circuit is good.
- The transmission lubrication relief valve is closed.
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| Illustration 1 | g01089423 |
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Tooling (A) | |
Use the tools in Table 1 to complete the following test procedure.
| Required Tools (Pressure Gauges) | ||||
|---|---|---|---|---|
| Tool | Item | Part Number | Description | Qty |
| A | A1 | 6V-3989 | Fitting (Test) | 2 |
| A2 | 8T-0855 | Pressure Gauge | 2 | |
| A3 | 177-7861 | Hose As | 2 | |
| A4 | 6V-4143 | Coupler | 4 | |
| 186-2602 | Pressure Sensor
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1 | ||
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Sudden movement of the machine or release of oil under pressure can cause serious injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system. |
| 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 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 and mandates. |
Pressure gauges are used in the following test procedure.
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| Illustration 2 | g01276773 |
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Pressure tap location for lubrication test | |
- Attach a coupler to the transmission lubrication pressure tap (1). If necessary, connect the pressure hose. Install a pressure gauge
400 kPa (58 psi) to the fitting. - Start the engine and warm the oil up to
60 °C (140 °F) . - Run the engine at LOW IDLE rpm with the transmission control lever in the NEUTRAL position. The pressure on the gauge must be a minimum of
4 kPa (0.5 psi) . - Run the engine at HIGH IDLE with the transmission control lever in the NEUTRAL position. The pressure on the gauge must be
179 ± 27 kPa (26 ± 4 psi) . - When the test is complete, stop the engine and remove the test equipment.