216B, 226B, 232B and 242B Skid Steer Loaders Machine Systems Caterpillar

Show/hide table

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the power train.

Before you perform these procedures, refer to Testing and Adjusting, "Machine Preparation" for the correct procedure for machine preparation.

The following operational checks can be used for the following items:

• find leakage in the system.

• determine whether the pilot operated hydraulic controls are functioning correctly.

• determine whether the pumps and motors are functioning correctly.

• determine whether the whole work tool system is functioning correctly.

In order for the hydraulic system to function properly, each component in the system must be set to the correct specifications. Some components must be set prior to the testing of other components. A component that is not set properly will have an impact on other components in the system.

Note: When any test is performed on the hydraulic system, the hydraulic oil must be at an operating temperature of 45° ± 5°C (113° ± 9°F). This temperature range is specified for the standard filled oil at the factory. Use the 164-3310 Infrared Thermometer or the equivalent to measure this temperature at the canister for the hydraulic filter. To increase hydraulic system temperature, start the engine and operate all hydraulic cylinders for at least five cycles. Move the work tool through the full range of motion.

Lift Cylinder Speed Test

Note: Perform the lift cylinder speed test with an empty general purpose bucket. If a general purpose bucket is not available, then use a load weight of 200 kg (441 lb).

1. Fasten the seat belt and lower the armrest.

2. Start the engine.

3. Disengage the parking brake.

4. If the automatic leveling switch is in the ON position, then turn the automatic leveling switch to the OFF position.

5. Run the engine at HIGH IDLE with the pilot operated hydraulic control ( hydrostatic) in the HOLD position.

6. Operate the lift cylinder through at least five lift cycles. This will ensure that there is warm oil in the lift cylinders.

7. Tilt the bucket to the full TILT BACK position. Lower the bucket to the full LOWER position.

8. Raise the bucket from the full LOWER position. Record the time from the full LOWER position to the full RAISE position.

9. Lower the bucket from the full RAISE position. Record the time from the full RAISE position to the full LOWER position.

10. Raise the bucket to the full RAISE position. Move the hydraulic control to the FLOAT position. Record the time from the full RAISE position to the full LOWER position.

If the speeds are not correct, refer to the Testing and Adjusting, "Hydraulic System Troubleshooting".

Tilt Cylinder Speed Test

Note: Perform the tilt cylinder speed test with an empty general purpose bucket. If a general purpose bucket is not available, then use a load weight of 200 kg (441 lb).

1. Fasten the seat belt and lower the armrest.

2. Start the engine.

3. Disengage the parking brake.

4. Run the engine at HIGH IDLE with the pilot operated hydraulic control ( hydrostatic) in the HOLD position.

5. Operate the tilt cylinders through at least five cycles. This will ensure that there is warm oil in the tilt cylinders.

6. Tilt the bucket to the full TILT BACK position. Raise the bucket to the full RAISE position.

7. Tilt the bucket from the full TILT BACK position to the full DUMP position. Record the time from the full TILT BACK position to the full DUMP position.

8. Tilt the bucket from the full DUMP position to the full TILT BACK position. Record the time from the full DUMP position to the full TILT BACK position.

9. Lower the bucket to the ground.

If the speeds are not correct, refer to the Testing and Adjusting, "Hydraulic System Troubleshooting".

Hydraulic Quick Coupler (if equipped)

1. Fasten the seat belt and lower the armrest.

2. Start the engine.

3. Disengage the parking brake.

4. Run the engine at HIGH IDLE with the pilot operated hydraulic control ( hydrostatic) in the HOLD position.

5. Press the switch in order to engage the quick coupler. Record the time that is needed to engage the quick coupler. Press the switch in order to disengage the quick coupler. Record the time that is needed to disengage the quick coupler.

If the speeds are not correct, refer to the Testing and Adjusting, "Hydraulic System Troubleshooting".

Drift Check (Lift and Tilt Cylinder)

Use this procedure to determine the amount of wear that occurs in the lift cylinders and the tilt cylinders.

Note: Perform the following tests with a general purpose bucket on the machine. If a general purpose bucket is not available, use a load weight of 200 kg (441 lb).

1. Before you perform these procedures, refer to Testing and Adjusting, "Machine Preparation" for the correct procedure for machine preparation.

2. Run the engine at HIGH IDLE.

3. Operate the lift cylinders through at least five cycles. This will ensure that there is warm oil in the lift cylinder.

4. Operate the tilt cylinders through at least five cycles. This will ensure that there is warm oil in the tilt cylinder.

5. Raise the bucket to the full RAISE position.

6. Tilt the bucket forward until the bucket is parallel with the ground.

7. Reduce the engine speed to LOW IDLE. Stop the engine.

8. Mark the cylinders.

9. Use a stopwatch to count for one minute. Measure the drift of the cylinders.
   Show/hide table

   Table 4

   CYLINDER DRIFT
   Cylinders	Time	Cylinder Drift
   Tilt Cylinders	1 minute	3 mm (0.118 inch)
   Lift Cylinders	1 minute	3 mm (0.118 inch)

   Note: If the lift cylinder drift and/or the tilt cylinder drift exceeds the maximum, refer to Testing and Adjusting, "Hydraulic System Troubleshooting" for probable causes.

10. Start the engine and lower the bucket to the ground.

Test for Tracking of the Machine (Drift)

This test will determine if each displacement stop is adjusted correctly in each group of rotation. The two displacement stops adjust the maximum stroke of the swashplate in each of the groups of rotation in the forward direction.

Note: If the machine drifts to the same side in both forward and reverse, check the chain tension on both sides of the machine before you proceed with the test.

1. Move the machine to a testing location that is flat, level and 30.5 m (100 ft) long. Allow enough space on each side of the centerline for any machine drift that could exceed 3 m (10 ft).

   .

2. Inflate all four tires to the same air pressure.

3. Start the test outside the test area. The machine must enter the testing location in straight line travel and the machine must be traveling at full speed. The engine must be set to HIGH IDLE and the speed and direction control must be positioned fully forward.

4. Measure the amount of drift and record the direction of the drift.
   Show/hide table

   Table 5

   Test for Tracking of the Machine (Drift)
   Test	Specification
   Engine Speed	3195 ± 65 RPM
   Drift	3 m (10 ft)

5. If the machine does not pass this test, refer to the Testing and Adjusting, "Maximum Runout Test".