TRANSFORMER GP-IGNITION 4184862 - Caterpillar

1Three class sizes of pistons are available. Diameters of the spherical link end are in proportion to the diameters of the spherical seat in the drive shaft. Class size is marked on the piston accordingly. (See illustration 6.)Note: Class sizes cannot be mixed.
Illustration 6 g02503236
Class size is marked on the piston accordingly.Port Plates
Table 5
Use Again Wear Specifications For Port Plates    
Part Number     Minimum Thickness     Standard Thickness    
9T-4552    
7.92 mm (0.312 inch)    
8.00 mm (0.315 inch)    
9T-4612    
9.90 mm (0.390 inch)    
10.00 mm (0.394 inch)    
9T-7727    
4.90 mm (0.193 inch)    
5.00 mm (0.199 inch)    
5W-5315    
11.90 mm (0.469 inch)    
12.0 mm (0.472 inch)    
5W-74571    
9.25 mm (0.364 inch)1    
9.34 mm (0.368 inch)1    1Port plates which have a spherical sealing face should be lapped using the mating barrel assembly. Thicknesses for this type of plate are measured at the outer seal band.Note: Port plates are gas nitride hardened to a depth of 0.20 mm (0.008 inch). When power lapping, do not remove more than 0.10 mm (0.004 inch) from the thickness. Surface reconditioning by grinding is not recommended. Port plates should be power lapped. Surface hardness must be Rc 30 or greater when measured with a 6V-6035 Hardness Tester .Swash Plates
Illustration 7 g02503238
Typical swash plate.(15) Rocker bearing surfaces.(16) Slipper contact face.
Table 6
Use Again Wear Specifications For Swash Plates    
Minimum Thickness (H)     Minimum Length (L)    
39.95 mm (1.573 inch)    
131.85 mm (5.191 inch)    
43.35 mm (1.707 inch)    
139.85 mm (5.506 inch)    
49.35 mm (1.943 inch)    
155.85 mm (6.136 inch)    
54.85 mm (2.160 inch)    
173.35 mm (6.825 inch)    Note: Swash plates are gas nitride hardened. Do not remove more than 0.18 mm (0.007 inch) from face when power lapping. Swash plates with bearing fret or heat check on rocker side should not be used again. Surface hardness must be Rc 30 or greater when measured with a 6V-6035 Hardness Tester .Barrel Assemblies
Table 7
Use Again Wear Specifications For Barrel Assemblies    
Reference Piston Diameter     Maximum Bore Diameter     Pin Diameter     Maximum Dimension Between Pins1    
18.98 mm (0.747 inch)    
19.000 mm (0.7480 inch)    
3.500 mm (0.1378 inch)    
32.30 mm (1.272 inch)    
21.47 mm (0.845 inch)    
21.520 mm (0.8472 inch)    
3.500 mm (0.1378 inch)    
42.78 mm (1.684 inch)    
22.47 mm (0.885 inch)    
22.515 mm (0.8864 inch)    
3.500 mm (0.1378 inch)    
40.92 mm (1.611 inch)    
27.00 mm (1.063 inch)    
27.015 mm (1.0636 inch)    
3.500 mm (0.1378 inch)    
42.80 mm (1.685 inch)    
16.00 mm (0.630 inch)    
16.010 mm (0.6303 inch)