SPRING 5D9982 - Caterpillar

Illustration 5 g00805312
Lift-Off Limitation Adjustment (Cylinder Barrel to Port Plate Maximum Separation)
Table 3
Tools Required:    
Motor     9t8345    
Gauge Blocks     -    
Dial Indicator Group     8s2328    
Measuring Kit, Tool Group (8t7760)     Support     8t7756    
Cylinder 8t7764    
Centering Pin 8t7763    
Centering Disc (with two screws) 8t7759    The clearance from spacer (3) to pin (4), in combination with the compression springs (5), maintains the barrel (2) to port plate (1) separation. The maximum separation limits the leakage during startup and downhill operation.The adjustment procedure determines the correct size of the spacer required for the distance between the center pin and centering pin (12). With correct distance (B), clearance (C) between spacer (3) and center pin (4) is 0.10 to 0.25 mm (.004 to .010 in)
Illustration 6 g00492634
Dial Indicator Setup (13) Gauge blocks (19) SupportPlace support (19) on a surface plate. Using gauge blocks (13), build up dimension (B) as listed in the chart. Set up the dial indicator and zero.
Illustration 7 g00492639
Spacer Installation (1) Port plate (2) Cylinder barrel (3) Spacer (20) Wire (21) CylinderUse wire (20), to guide spacer (3) into cylinder (21). Place center pin in cylinder (21) without compression springs (5).
In order to avoid damage to center pin (4) and support (19) in the next step, place measuring kit cylinder (24) over support and lay cylinder on its side (horizontal).
Illustration 8 g00492668
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). Stand the cylinder in a vertical position. Insert centering pin (12) in port plate (1) and barrel (2). Position centering disc (22) and lifting screws (23) over the port plate. Slide the assembly under the dial indicator.The dial indicator must read between -0.10 and -0.20 mm (-.004 and -.008 in). The motor has four different sizes of spacers. There is a minimum spacer size. Each succeeding size of the spacers is 0.10 mm (.004 in) thicker. Depending on the reading on the dial indicator, select the correct spacer.
Table 4
Motor     Spacer     Thickness     Difference From Minimum Spacer    
9t8345     9t1650    
9.6 mm (0.38 inch)    
0 mm (0 inch)
Minimum Spacer    
9t1651
9.7 mm (0.382 inch)    
.1 mm (0.004 inch)    
9t1646
9.8 mm (0.386 inch)    
.2 mm (0.008 inch)    
9t1648
9.9 mm (0.39 inch)    
.3 mm (0.012 inch)    For example, tolerance for dimension (B) is −0.40 mm (−0.016 inch) on the dial indicator. Remove the spacer with the minimum thickness and replace the spacer with a spacer that increases the indicator reading by 0.20 mm (0.008 inch) in order to give a dimension (B) of 136.3 mm (5.37 inch).Once the correct spacer has been selected, center pin (4) can be removed. Compression springs (5) can be inserted by using wire