CASE 3888491 - Caterpillar

Table 1
"Swing Motor - Test (Measurement of Case Drain Oil)"    
Date     Machine Serial Number    
Machine Settings     Swing Relief Pressure     Engine Speed    
29400 + 1000 - 1500 kPa (4250 + 145 - 218 psi) Engine speed dial "10"
AEC Switch OFF    
Item     Specification (1)     Actual    
New Swing Motor    
31 L/min (8.2 US gpm)     1.    
2.
3.
Rebuilt Swing Motor    
36 L/min (9.5 US gpm)     1.    
2.
3.
( 1 ) Maximum acceptable flow
Table 2
Required Tools    
Part Number    Description    Qty    
6V-9830     Cap     1    
    Wrench
24 mm (0.94 inch)     1    
    Container for Measuring     1    
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
Attach 311-1362 Vacuum Cap onto the hydraulic tank. Attach an air supply hose onto the assembly. Apply 276 to 414 kPa (40 to 60 psi). This procedure will pull a vacuum on the hydraulic system.
Illustration 1 g01188962
Swing motor compartment (1) Case drain hose (2) Tee
Disconnect the case drain hose (1) from tee (2) . Place the open end of the case drain hose (1) into the container for measuring.
Install 6V-8398 O-Ring Seal and 6V-9830 Cap on tee (2) of the swivel.
Illustration 2 g00817473
Pilot manifold (3) Connector (4) Solenoid valve for swing parking brake
Disconnect connector (3) from solenoid valve (4) for the swing parking brake.
Remove 311-1362 Vacuum Cap and install the filler plug for the hydraulic tank.
Start the engine.
Place the engine speed dial at position "10" and AEC switch OFF.ReferenceRefer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Slowly move the swing joystick and make sure that the swing parking brake is activated.
Move the swing joystick fully for 1 minute. Measure the case drain oil.
Stop the engine.
Connect connector (3) to the solenoid valve for swing parking brake (4) .
Repeat this test procedure three times in order to obtain three measurements. For each test procedure, swing the upper structure to a different position.The following values specify the maximum acceptable flow of case drain oil when the swing relief pressure is set at 29400 + 1000 - 1500 kPa (4250 + 145 - 218 psi). New swing motor ... 31 L/min (8.2 US gpm) Rebuilt swing motor ... 36 L/min (9.5 US gpm)