VALVE GP-PUMP CONTROL 2289694 - Caterpillar

The clearance between spacer (2) to pin (5) plus coil springs (4) maintains the maximum separation between barrel (1) to port plate (3). This maximum separation limits the leakage during start-up and downhill operation.The adjustment procedure determines the correct size of spacer in order to get distance (B). The correct clearance for dimension (B) is 0.325 0.075 mm (.0127 .003 inch).
Illustration 5 g00404938
Setup for dial indicator (13) Gauge blocks (19) SupportPlace support (19) on a surface plate. Use gauge blocks (13) to build dimension (B) that is listed in table 1. Set up the dial indicator and zero.
Illustration 6 g00404978
Spacer installation (1) Port plate (2) Cylinder barrel (3) Spacer (20) Wire (21) CylinderRemove the flushing valve from plate (1). Use a piece of wire (20) to guide spacer (3) (minimum thickness) into center pin cylinder (21) of barrel (2). Place center pin in cylinder (21) without coil springs (5).
To avoid damage to center pin (4) and support (19) in the next step, place measuring kit cylinder (24) over the support and lay the cylinder on its side (horizontal).
Illustration 7 g00405118
Measurement for spacer thickness (1) Port plate (2) Cylinder barrel (3) Spacer (4) Center pin (12) Centering pin (19) Support (22) Centering disc (23) Lifting screws (24) Measuring kit cylinder (25) Centering holeInsert barrel (2), spacer (3), and center pin (4) into the centering hole (25) in support (19). Place the cylinder in a vertical position. Insert centering pin (12) in port plate (1) and barrel (2). Position centering disc (22) with two lifting screws (23) over the port plate. Slide this assembly under the dial indicator.The dial indicator must read -0.25 to -0.040 mm (-.010 to -.016 inch) and (). The motor has four different sizes of spacers in order to get the correct distance. There is a minimum spacer size. Each succeeding size of spacer is 0.10 mm (.004 inch) thicker. Select the appropriate spacer in order to get the proper distance.
Table 4
Motor    Spacer    Thickness (mm)    Difference From Min Spacer (mm)    Dimension (C)    
171-3065     119-6117     9.6     0 (min spacer)     3.44 mm    
119-6118 9.7     .1     3.53 mm    
119-6119 9.8     .2     3.63 mm    
119-6120 9.9     .3     3.72 mm    For example, the measurement for dimension (B) is -0.50 mm (-.020 inch) on the dial indicator. In this case, remove the spacer with the minimum thickness and replace this spacer with a spacer that increases the indicator reading by 0.10 mm (.004 inch). This gives a final dimension (B) of -0.40 mm (-.016 inch).Once the correct spacer has been selected, center pin (4) can be removed. Use a piece of wire (20) as a guide to insert six compression springs (5). The orientation of the six compression springs is important. Refer to illustration 1 at the beginning of this procedure for the proper orientation of the spring.
Illustration 8 g00405258
Installation of compression springs (5) Compression springs (20) Wire
Illustration 9 g00405279
Cross section of spacer (A)