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HITCH AR 2278633 - Caterpillar

2278633 HITCH AR Caterpillar parts TH330B HITCH
Alternative (cross code) number:
Caterpillar 2278633 HITCH AR

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Compatible equipment models: 2278633:

TELEHANDLER  TH330B   Caterpillar
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Table 1
Required Tools    
Part Number    Description    Qty    
24 mm (.94 inch) Spanner Wrench     1    
    Cap 3/4-16 UN     2    
    Container for Measuring     1    
Illustration 1 g00451509
Swing motor compartment (1) Case drain hose (2) Connector (3) Connector (4) Swing parking brake solenoid valve
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.
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
Disconnect the case drain hose (1) from connector (2). Place the open end of the case drain hose (1) into the container for measuring.
Install a cap 3/4-16 - UN on connector (2) of the swivel.
Disconnect connector (3) from swing parking brake solenoid valve (4) .
Start the engine and place the power mode switch in POWER MODE position.
Place the engine speed dial at position "10" and AEC switch OFF. Maintain the maximum no-load speed at 2300 50 rpm.Reference: Refer to Testing and Adjusting, "Operational Checks" for engine rpm settings.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Slowly move the swing control lever and make sure that the swing parking brake is activated.
Move the swing control lever fully for one minute. Measure the case drain oil.
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
Connect connector (3) to swing parking brake solenoid valve (4). Release the swing parking brake.
Remove the cap from connector (2) of the swivel.
Connect case drain hose (1) to connector (2) .
Start the engine.
Operate the swing control lever in order to change the position of the swing motor.
Repeat Steps 1 through 17 in order to measure the case drain oil three times.The following values specify the maximum acceptable flow of case drain oil when the swing relief pressure is set at 27500 980 kPa (4000 140 psi). New swing motor ... 15 L/min (4.0 US gpm) Rebuilt swing motor ... 17 L/min (4.5 US gpm)

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