HARNESS AS 5285808 - Caterpillar

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.
Required Tools
Hydraulic test procedures may be performed using either one of the following test equipment:
Digital Pressure Indicator
Standard toolingDigital Pressure Indicator
Illustration 1 g00939662
Table 1 provides a list of the required tools if the 198-4240 Digital Pressure Indicator is used to perform the following test procedure.
Table 1
Required Tools
Digital Pressure Indicator    
Tool    Item    Part Number    Description    Qty    
A     A1     198-4234     Digital Pressure Indicator     2    
A2 198-4239     Pressure Sensor
0 - 68,900 kPa (0 - 10,000 psi)     2    Standard Tooling
Illustration 2 g00939665
Illustration 3 g00939666
Table 2 provides a list of the required tools if standard tooling is used to perform the following test procedure.
Table 2
Required Tools (Standard Tooling)    
Tool    Item    Part Number    Description    Qty    
B     B1     177-7860     Hose As     2    
6V-4143 Coupler 4    
B2 8T-0861     Pressure Gauge
0 - 60000 kPa (0 - 8700 psi)     2    
6V-3989 Fitting 2    
C     -     4C-6500     Digital Thermometer     1    
Make sure that the parking brake is activated. The propel control lever should be in the NEUTRAL position.
Place wooden wedges under both sides of the drums or tires (if equipped).
Illustration 4 g00954396
Brake Interlock Valve (1) Wiring harness for the brake solenoid
Set the brakes by disconnecting the wiring harness for brake solenoid (1). The wiring harness is identified by wire number 777-PU.
Illustration 5 g00951894
Propel Pump (2) Forward relief valve test port (3) Reverse relief valve test port
Connect tooling (A) or (B) to pressure test ports (2) and (3) of the propel pump.
Start the machine and run the engine at 3005 15 RPM for 4 cylinder engines CB-334E (S/N: C4F1-UP, C4X1-UP) and CB-335E (S/N: C5F1-UP). Start the machine and run the engine at 2800 10 RPM for 3 cylinder engines CB-334E (S/N: C4J1-UP) and CB-335E (S/N: C5J1-UP). Check the hydraulic temperature with Tool (B) until the hydraulic oil temperature reaches 38°C (100°F).
Pull the parking brake knob upward.
Move the propel control lever to the full FORWARD direction and the full REVERSE direction. Read the pressure gauges. The pressure at both gauges should peak at 37500 1000 kPa (5439 145 psi).
At this pressure, the drum and the wheels should not move.
If the drum and the wheels move, refer to Propel System Troubleshooting in order to diagnose the problem.
Remove the tooling.
Reconnect wiring harness (1) for the brake solenoid.