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DISTRIBUTION AR 3966796 - Caterpillar



3966796 DISTRIBUTION AR Caterpillar parts 314D LCR DISTRIBUTION
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Alternative (cross code) number:
CA3966796
396-6796
3966796
Caterpillar 3966796 DISTRIBUTION AR

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Compatible equipment models: 3966796:

EXCAVATOR  314D LCR   Caterpillar
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Auxiliary Flow Adjustment with a Flow Meter
Auxiliary flow adjustment may be critical for the work tool. To ensure the accuracy of auxiliary flow, a flow meter must be installed within the system.An adjustment to the proportional reducing valve that controls output to port "A" can be achieved by adjusting the pilot pressure that acts on port "a". An adjustment to the proportional reducing valve that controls output to port "B" can be achieved by adjusting the pilot pressure that acts on port "b". Refer to Table 2 for port identification for each configuration.
Illustration 31 g01807534
Flow meter tool layout for auxiliary flow adjustment (21) Line (high pressure auxiliary) (22) Line (high pressure auxiliary) (23) Medium pressure auxiliary control valve (24) High pressure auxiliary control valve (25) 148-8390 Elbow assembly (26) 148-8393 Elbow assembly (27) 7J-9108 O-Ring seal (28) 6V-9510 Plug (29) 4I-6140 Connector (30) 8T-1718 Elbow (31) 7M-8485 O-Ring seal (32) 4C-6482 Nipple assembly (33) 6V-9746 O-Ring seal (34) 4C-6481 Coupler assembly (35) 2M-9780 O-Ring seal (36) 6V-8629 Elbow (37) 6V-9746 O-Ring seal (38) 4C-8767 Coupling (39) 5P-1010 Sleeve (40) 5P-0201 Hose (41) 8C-9026 Adapter (42) 6K-6307 O-Ring seal (43) 4C-9910 Portable hydraulic tester (flow meter)
Illustration 32 g01812213
Port Identification for high pressure and medium pressure auxiliary (44) Port "A" ("A3 Valve Extend") (45) Port "B" ("A3 Valve Retract") (46) Port "A" ("A1 Valve Extend") (47) Port "B" ("A1 Valve Retract")
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.
Install the pressure taps for the pilot pressure measurement. Refer to "Installation of Pressure Taps".
Install the following tools in accordance with the flow meter tool layout. Refer to Illustration 31.
Disconnect line (21) and line (22) from elbow (25) and (26) on the attachment control valve.
Install seals (27) and plugs (28) in the open end of line (21) and line (22) .
Assemble elbow (30) and seal (33). Replace elbow assembly (26) with elbow assembly (30) .
Assemble elbow (36), seal (35), and seal (37). Replace elbow assembly (25) with elbow assembly (36) .
Assemble and install connectors (29), seals (31) and nipple assembly (32) to elbow (30) and elbow (36) at the attachment control valve.
Connect portable hydraulic tester (43) and the test hoses to nipple assemblies (32) at the attachment control valve.Note: Install the hoses in order to maintain the appropriate directional flow through the flow meter.
Remove 311-1362 Vacuum Cap and install the filler plug for the hydraulic tank.
Connect a 4000 kPa (580 psi) pressure gauge to the pressure taps for the measurement of pilot pressure.
To prevent personal injury or equipment damage from failure of the hydraulic test equipment or associated circuit components because of blocked pump flow, make

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