ROLLER GP-TCK 1885597 - Caterpillar

Illustration 3 g00835420
Measurement of the thickness of the shim pack (5) Cover (6) Shims (14) Dial indicator (15) Support (16) Location of ring (17) Boss (A) Dimension from ring (4) to end of shaft (8)
Place the mechanical drive on support (15) with boss (17) over the hole in the support. Place cover (5) on the mechanical drive. The seal and the O-ring are not needed for this measurement. Do not install the ring at location (16) .
Move the support and the mechanical drive under the dial indicator.
Add shims (6) in order to obtain a reading of 0 to -0.10 mm (0 to -0.004 inch).Adjustment of the Lift-off Limitation of the Steering Motor
Maximum Separation between the Cylinder Barrel and the Port Plate
Table 3
Required Tools for 159-7156 Piston Motor    
Item    Part Number    Description    Quantity    
13         Set of Standard Gauge Blocks     1    
14     8T-5096     Dial Indicator     1    
18     8T-7763 (1)     Center Pin     1    
19     8T-7756 (1)     Support     1    
20     8T-7759 (1)     Disc (Centering)     1    
21     8T-7764 (1)     Cylinder     1    
22     7J-0637     Screws (Hex) (1/4 inch by 20 by 3/8 inch)     2    
( 1 ) Component of 8T-7760 Tool (Group)Dimension (B) is the clearance between shim (12) and center pin (10). Shim (12) and spring (11) maintain the correct separation between cylinder barrel (2) and port plate (1). The maximum separation limits leakage during start-up and during downhill operation. See Illustration 1 for the references on components.The adjustment procedure determines the correct size of shim (12) in order to obtain dimension (C).
Illustration 4 g00835425
Gauge with dial indicator for measurement of dimension (C) (13) Gauge blocks (14) Dial indicator (19) Support (C) Dimension from the end of shaft (8) to center pin (18)
Place support (19) on a smooth surface.
Use gauge blocks to obtain dimension (C) in Table 1. Dimension (C) is measured between the center of the pivot head of center pin (10) and center pin (18). When dimension (C) is correct, clearance (B) between shim (12) and center pin (10) is 0.325 0.075 mm (0.0128 0.0030 inch).
Zero the gauge on the dial indicator.
Illustration 5 g00806928
Measurement for the correct shim thickness (1) Port plate (2) Cylinder barrel (10) Center pin (12) Shim (14) Dial indicator (18) Center pin (19) Support (20) Disc (centering) (21) Cylindrical mount (22) Lifting screws (23) Center hole (C) Reference dimension from end of shaft (8) to center pin (18)
Remove the flushing valve from port plate (1) .
Install shim (12) in the center bore of cylinder barrel (2) .
Install the center pin in the center bore without spring (11) .
Insert cylinder barrel (2), shim (12) and center pin (10) into center hole (23) in support (19) .
Place the cylindrical mount in a vertical position. Insert center pin (18) in port plate (1) and cylinder barrel (2). Install