ROD AS 7Y6641 - Caterpillar

Machine Preparation
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.
Position the machine on level ground.
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 g03352012
Swing motor (top view)
(1) Swing motor
(2) Swivel
(3) Case drain line
(4) Tee adapter
Locate case drain line (3) on the top of swivel (2) and the side swing motor (1).
Disconnect the case drain line from both swing motor (1) and swivel (2).
Illustration 2 g03352010
Flow Meter Tool Layout
(1) Swing Motor
(2) Swivel
(4) 6V-8781 Tee
(5) 6V-8636 Connector
(6) 2M-9780 O-Ring Seal
(7) 6V-8398 O-Ring Seal
(8) 157-2348 Elbow
(9) 8C-6758 Connector
(10) 7J-9108 O-Ring Seal
(11) 8T-1710 Permanent Coupling
(12) 6V-9476 Hose
(13) 6V-8943 Reducer Assembly
(14) 6V-9746 O-Ring Seal
(15) 8C-6874 Connector
(16) 6V-7788 Flow Meter
(17) 3E-7403 Connector
(18) 6V-8397 O-Ring Seal
Install the following tools in accordance with the flow meter tool layout. Refer to Illustration 2.
Disconnect connector (5) from side of swing motor (1).
Install O-ring (6) and connector (9) in place of connector (5).
Install O-ring (18), connector (17), O-ring (7), and elbow (8) on tee (4) of swivel (2).
Connect flow meter (16) between connector (9) and elbow (8).Note: Correct orientation of the flow meter is necessary. The oil flows from swing motor (1) to swivel (2).
Perform the following steps to engage the swing parking brake.
Illustration 3 g03353757
Main control valve (swing lines)
(19) Adapter
Disconnect the pilot line from adapter (19) at the SBU port on the main control valve.
Install 4J-5477 O-Ring Seal and 6V-9828 Cap As on adapter (19).
Install 4J-5477 O-Ring Seal and 6V-9507 Plug on the pilot line.
Remove 311-1362 Vacuum Cap and install the filler plug for the hydraulic tank.Test Procedure
Start the engine.
Place the machine controls at the following settings: engine speed dial "High Idle". Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Place the hydraulic activation control lever in the UNLOCKED position.
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.
Repeat this test procedure three times 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 24000 400 kPa (3481 58 psi).New swing motor