ACTUATOR A- 4W2213 - Caterpillar

Note: Make sure that the filters and the screens are clean before you test any pressures. Make sure that the oil is at operating temperature before you perform this test.Specifications
Table 1
Pressure for lockup clutch pilot oil    
Pressure setting    
1725 100 kPa (250 15 psi)    
Table 2
Chart of Shims for the Pressure Reduction Valve (1)    
Part No. for the Shims    Thickness of the Shims    Change in Pilot Pressure as a Result of One Shim    
5J-2721 Shim    
0.13 mm (0.005 inch)    
10 kPa (1.4 psi)    
6J-3993 Shim    
0.25 mm (0.010 inch)    
19 kPa (2.8 psi)    
5J-1036 Shim    
0.80 mm (0.031 inch)    
60 kPa (8.7 psi)    
( 1 ) Before an adjustment is made, be certain that the valve spring is not weak or broken.Introduction
This test will show if the pressure reduction valve is correctly set and if the synchronizing valve is receiving pilot pressure.Required Tools
Table 3
Required Tools    
Tool    Item    Qty    Part Number    Description    
B     B1     1     8T-0855     Pressure Gauge
0 to 4000 kPa (0 to 580 psi)    
B2 1     6V-2989     Fitting    
B3 2     6V-4143     Coupler    
B4 1     177-7861     Hose As    
F     F1     1     6V-3965     Fitting 9/16-18    
F2 1     3J-1907     O-ring Seal 9/16-18    
Illustration 1 g02726620
Illustration 2 g01784963
Test Procedure
Illustration 3 g01082637
Pressure reduction valve (1) Shims (2) Pressure reduction valve
Illustration 4 g03383618
Torque converter lockup clutch and solenoid valve (3) Pressure tap for the lockup clutch pilot oil
Remove the plug at pressure tap (3). Install Tooling (F) at the location of the removed plug.
Use Tooling (B) to connect to Tooling (F) .
With the parking brake engaged, start and run the engine at low idle rpm with the transmission in NEUTRAL. Refer to 1 for the pressure requirement.
Stop the engine. After the pressure is correctly set, remove Tooling (B) and Tooling (F) .
Install the plug at pressure tap (3) .Problem: The oil pressure is too low
Probable Cause:
Pressure reduction valve (2) is sticking
Pressure reduction valve (2) is incorrectly set. Add shims (1). Refer to Table 2 Problem: The oil pressure is too high
Probable Cause:
Pressure reduction valve (2) is sticking
Pressure reduction valve (2) is incorrectly set. Remove shims (1). Refer to Table 2