HARNESS AS-ENGINE 1391211 - Caterpillar

Introduction
This information includes the following test:
Crossover Relief Valve (steering) - TestThis information includes the following adjustment procedure:
Crossover Relief Valve (Steering) - AdjustRequired Tools
Illustration 1 g02110753
Typical electric hydraulic pump group (F) with pressure gauge (G).
Illustration 2 g03777913
Test manifold block (H)
Table 3
Tool Part Number Description Qty
F 3S-6224 Electric Hydraulic Pump Gp 1
G 8T-0860 Pressure Gauge (0 to 40,000 kPa (0 to 5,800 psi)) 1
H 474-8877 Test Manifold Block 2
J 5P-1838 Adapter 2
K 1P-2375 Quick Connect Coupler 2
L 1P-2376 Quick Connect Coupler 2
M 8F-0024 Hose As 2
N 3B-7722 Pipe Bushing 1
P 7J-8611 Pipe Elbow 2 Test Preparation
Refer to Testing and Adjusting, "System Pressure Release".Test Procedure
Illustration 3 g06086584
Close-up view of the steering valve group
(1) Steering Valve Group
(2) Crossover Relief Valve
Remove crossover relief valve (2) from steering valve group (1). The steering cylinder work port relief valve and makeup valves are located in the steering control valve. The steering cylinder work port relief and makeup valves need to be bench tested.
Secure test manifold block (H) in a suitable holding device.
Install two adapters (J) and two quick connect couplers (K) in test manifold block (H).
Attach two quick connect couplers (L) to two hose assemblies (M).
Illustration 4 g02110866
Typical electric hydraulic pump group (F) with pressure gauge (G).
Connect two hose assemblies (M), two pipe bushings (N), and pipe elbow (P) to electric hydraulic pump group (F).
Illustration 5 g03777936
(2) Steering work port relief valve
(2A) Locknut
(2B) Adjustment screw
(H) Test manifold block
(aa) Port for the return oil
(bb) Port for the pressure line from electric hydraulic pump group (F)
Install steering work port valve (2) into test manifold block (H).
Install oil return line to port (aa).
Install the pressure oil line from electric hydraulic pump group (F) to port (bb).Note: Ensure that the hose assemblies are connected to the proper test port. If the lines are not connected correctly, the relief valve setting will be incorrect.
Turn electric hydraulic pump group (F) into the ON position. Check for leaks at any of the connections.
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 steering work port relief valve opens.
Shut off electric hydraulic pump group (F).The pressure of the steering work port relief valve should be 29100 300 kPa (4221 43.5 psi) at a flow of 21 2 L/min (5.5 0.5 US gpm). If the pressure setting is within the specified pressure range, install the relief valve back into control manifold (1).Steering Relief Valve - Adjust
Illustration 6 g06086594
Steering crossover relief valve
(2) Valve body
(2A) Locknut
(2B) Adjustment screw
Loosen the locknut (2). Turn adjusting screw (1) clockwise to increase the pressure. Turn the adjustment screw counterclockwise to decrease the pressure.When the correct pressure is reached, install crossover relief valve (2) with a new O-ring. The proper installation torque is 50 7 N m (37 5 lb ft).