SPRING 6N5164 - Caterpillar

Differential Lock Engagement Check
Safely remove frame lock. While machine is in forward motion and turning machine left or right, depress deferential lock floor switch located in the cab.If machine travel becomes rough due to the wheels dragging. The differentials are engaging.Specifications
Table 1
Worksheet
Target Pressure Actual Pressure
3100 300 kPa (450 45 psi) Introduction
When testing and adjusting the transmission and power train, move the machine to an area clear of obstructions, with safe exhaust ventilation for the exhausts. 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, do the procedure that follows before testing and adjusting the transmission and power train.
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.
The following procedure is used in order to test the operation of the differential lock.Required Tools
Illustration 1 g01089423
Illustration 2 g01623868
Table 2
Tool Item Part Number Description Qty
A A1 8T-0856 Pressure Gauge
(0 to 6,000 kPa (0 to 870 psi)) 1
A2 6V-3989 Fitting 1
A3 6V-4143 Quick Connect Coupler 2
A4 177-7860 Hose As
(3.0 m (10 ft)) 1
B 198-4240 Digital Pressure Indicator Gp
B1 198-4234 Digital Indicator 1
B2 198-4237 Pressure Sensor Gp
(0 to 3,445 kPa (0 to 500 psi)) 1
B3 198-4236 Adapter Cable As 1 Machine Preparation
Operate the machine until the transmission oil at the sump is at operating temperature of 76° 7°C (169° 13°F). Operate the machine until the hydraulic oil is at operating temperature of 62° 8°C (144° 14°F).
Locate the machine on a hard level surface. Engage the parking brake. Shut off the engine.
Illustration 3 g03694124
Test ports
Remove the dust cap. Attach Tooling (A) to test port (1) for rear axle.
Remove the dust cap. Attach Tooling (A) to test port (2) for front axle. Test Procedure
Start the engine and run the engine at low idle.
Place transmission in second neutral.
Depress the differential lock floor switch located in the cab. Hold switch for 5 seconds. Release differential lock floor switch for 5 seconds. Repeat step 3 four more times.
Measure pressure at low idle. Transmission in second neutral and differential lock floor switch depressed in cab. No steering or implement commands allowed during test. Ensure that pressure is within the limits listed in step 5
The gauge should read 3100 300 kPa (450 45 psi).
If the differential lock valve appears to be working properly, the differential lock clutch may need serviced.
Shut off the engine. Remove the test equipment.