GEAR & BEARING GP-SWING 1706727 - Caterpillar

Use the following Steps in order to test or check the appropriate relief valve setting:
Lower all of the work tools and the stabilizers to the ground.
Stop the engine.
Refer to UENR5205, "System Pressure - Release" for the information needed to release hydraulic pressure.
Remove the line relief valve to be tested and fit to the appropriate service tool line relief valve test block.
Illustration 1 g01296672
Example
Secure the appropriate test block in a suitable holding device.
Install two 030-8370 Adapters (G) and two 1P-2375 Couplers (H) in 288-6823 Manifold (E).
Attach two 1P-2376 Adapters (J) to two 8F-0024 Hose Assemblies (K).
Install line relief valve (F) in 288-6823 Manifold (E).
Connect two 8F-0024 Hose Assemblies (K), two 3B-7722 Bushings, and 7J-8611 Elbow to 3S-6224 Electric Hydraulic Pump.
Connect 8T-0860 Gauge to 3S-6224 Electric Hydraulic Pump.
Turn the 3S-6224 Electric Hydraulic Pump to the ON position. Check for leaks at the connection.
The 3S-6224 Electric Hydraulic Pump only has a 7.6 L (2 US gal) reservoir. Pump damage may result if the pump is operated with an empty reservoir.
Slowly increase the pressure. Record the pressure, when the line relief valve opens. Compare this pressure to Table 2.
Stop the pump.
Table 2
Line Relief Valve Pressure Settings Actual
Hydraulic Circuit Pressure Setting Actual Recorded Pressure
Rod End for STICK OUT 29000 kPa (4206 psi)
Head End for STICK IN
Extendable Stick (if equipped)
Rod End for retracting the stick 29000 kPa (4206 psi)
Auxiliary for backhoe (if equipped)
Head end and Rod end 29000 kPa (4206 psi)
SWING
Swing LEFT
Swing RIGHT 29000 kPa (4206 psi)
Backhoe BUCKET DUMP 33000 kPa (4786 psi)
Backhoe BUCKET CLOSE
BOOM RAISE 33000 kPa (4786 psi)
BOOM LOWER 415F2, 416F2, 420F2, 430F2 17500 kPa (2538 psi)
Loader Rod End for the Dump Operation 29000 kPa (4206 psi)
Head End for the Tilt Back Operation of the Loader Parallel Lift 16500 kPa (2393 psi)
Single Tilt 29000 kPa (4206 psi)
Auxiliary (if equipped) for the Loader
Line valve for the Head End
Port B 29000 kPa (4206 psi)
Illustration 2 g01296607
Line Relief Valve
(A) Cap
(B) Screw for Adjusting
(C) Locknut
If the line relief valve is within the specification, then go to Step 17. If the line relief valve is not within the specification, then an adjustment or replacement is required.
Remove cap (A). Loosen locknut (C) and turn adjusting screw (B) clockwise in order to increase pressure. Turn adjusting screw (B) counterclockwise in order to decrease pressure.
Check the oil level in the 3S-6224 Electric Hydraulic Pump and refill the oil if necessary. Repeat Steps 12, 13, 14, and 15.
Tighten locknut (C) to a torque of 20 N m (15 lb ft).
Remove the line relief valve .
Install a new O-ring on the line relief valve .
Install the line relief valve to a torque of 70 N m (50 lb ft).