PUMP GP-GEAR 1643656 - Caterpillar

Table 1
Required Tools
Part Number Description Qty
311-1362 Vacuum Cap 1
6V-8398 O-Ring Seal 2
6V-8738 Connector 1
157-2348 Elbow 1
6V-7788 Flow Meter 1
8C-6874 Connector 2
6V-9746 O-Ring Seal 2
6V-8943 Reducer Assembly 2
7J-9108 O-Ring Seal 4
8T-1710 Permanent Coupling 4
6V-9476 Bulk Hydraulic Hose 2
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 g01897153
Swing motor compartment
(1) Swing motor
(3) Case drain hose
Illustration 2 g01897155
(2) Swivel
(3) Case drain hose
(4) Tee
Locate case drain line (3) on swivel (2).
Illustration 3 g01897158
Flow Meter Tool Layout
(1) Swing Motor
(2) Swivel
(3) Case Drain Hose
(4) Tee
(5) 6V-8398 O-Ring Seal
(6) 157-2348 Elbow
(7) 6V-8738 Connector
(8) 7J-9108 O-Ring Seal
(9) 8T-1710 Permanent Coupling
(10) 6V-9476 Hose
(11) 6V-8943 Reducer Assembly
(12) 6V-9746 O-Ring Seal
(13) 8C-6874 Connector
(14) 6V-7788 Flow Meter
Install the following tools in accordance with the flow meter tool layout. Refer to Illustration 3.
Disconnect case drain hose (3) from tee (4).
Install O-ring (5) and connector (7) to case drain hose (3).
Install O-ring (5) and elbow (6) on tee (4) of the swivel.
Connect flow meter (14) between connector (7) and elbow (6). Note: Correct orientation of the flow meter is necessary. The oil flows from swing motor (1) to swivel (2).
Remove 311-1362 Vacuum Cap and install the filler plug for the hydraulic tank.
Illustration 4 g01899937
Pilot manifold
(15) Connector
(16) Solenoid valve for swing parking brake
Disconnect connector (15) from the solenoid valve for swing parking brake (16).
Start the engine.
Place the engine speed dial at position "10" and AEC switch OFF. Reference: Refer 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 one minute. Measure the case drain oil.
Stop the engine.
Connect connector (15) to the solenoid valve for swing parking brake (16).
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 to the proper specification. Refer to Testing and Adjusting, "Specifications" for the correct pressure setting. New swing motor ... 30 L/min (7.9 US gpm)Rebuilt swing motor ... 35 L/min (9.2 US gpm)