GASKET 2Y4215 - Caterpillar

Neutral Adjustment Procedure that Uses Pressure Gauges
Table 1
Required Tools    
Tool     Part Number     Description     Quantity    
A     4J-5477     O-Ring Seal     2    
B     124-8909     Elbow     2    
C     7X-5315     Coupling     2    
D     8T-0854     Pressure Gauge     2    
E     8T-0855     Pressure Gauge     2    
F     6V-9828     Cap     2    
G     6V-9507     Face Seal Plug     2    
Illustration 2 g00736016
The neutral adjustment is the only adjustment that can be made on the electrical displacement control (EDC). Adjustment of neutral adjustment screw (1) that is located on the end of the EDC performs the neutral adjustment.
Illustration 3 g00736045
Locate the gauge ports "M4" (2) and "M5" (3) on the top of the pump.
Install two 4J-5477 O-Ring Seals and two 124-8909 Fittings into ports "M4" (2) and "M5" (3). Install two 7X-5315 Couplings to the fittings.
Install two 8T-0855 Pressure Gauges on the couplings.Note: Under normal working conditions, the pressure could be as high as charge pressure. The pressure will be different on each pump. This is due to the different routing of the case drain lines. The left hand pump case drain runs through the case drain filter and the oil cooler. The right hand pump case drain line runs to the front return manifold.
Disconnect the electrical connections for the EDC at the propel pump.
Illustration 4 g00736121
Disconnect the balance lines (4) and (5) between the pumps. Plug the lines with two 6V-9507 Face Seal Plugs. Cap the fittings with two 6V-9828 Caps .Note: If the pressure is brought too high, the gauges could be damaged.
Start the engine and run the engine at high idle until the hydraulic oil temperature is at least 38 °C (100 °F). Read the pressure gauges. If the pressure is below 965 kPa (140 psi), remove the gauges and replace the gauges with two 8T-0854 Pressure Gauges .Note: If the pumps are stroked manually during this procedure, the gauges will be damaged.The pressure reading on the gauges should be equal. If the readings are not equal, use the following steps in order to adjust the adjustment screw for the EDC on the end of the controller.
Use a 13 mm wrench or a 4 mm Allen wrench for the neutral adjustment screw. Rotate the screw clockwise until the pressure increases on one of the gauges. Note the angle of the wrench and note the pressure reading of the gauge.
Rotate the screw counterclockwise until the pressure increases by the same amount that was read on the other gauge. Note the angle of the wrench and note the pressure reading on the gauge.
Rotate the adjustment screw clockwise in order for the screw to be half the distance between the noted positions from the two previous steps. The gauges should read the same pressure within 35 kPa (5 psi) of each other.