HOSE BK 5417141 - Caterpillar

Illustration 12. Measurement For Spacer Thickness4. Once the correct spacer size has been determined, centering pin (13) and spacer (12) can be removed and four compression springs (6) inserted using a straight piece of wire (20) as a guide.
Illustration 13. Installation Of Compression Springs (6) Compression springs (four). (20) Wire.Pump & Motor Adjustments For 330 Excavators
Main Pump Rotating Group Adjustment
Illustration 14. Cross Section Of Pump Rotating Group (1) Port plate. (2) Spacer. (3) Cylinder barrel. (4) Piston. (5) Center pin (6) Compression springs (four). (7) Shaft/gear. (8) Bearing assembly. (9) Bearing assembly.
Illustration 15. 126-6888 Measuring Kit (Partial Consist) (10) Support. (11) Cylinder. (12) Spacer. (13) Centering pin. (14) Centering disc. (15) Lifting Screws.Each of the two pump rotating groups are divided into two groups. The mechanical drive group consists of shaft/gear (7) and bearing assemblies (8) and (9). The hydraulic group consists of barrel (3), port plate (1), pistons (4), center pin (5), compression springs (6) and spacer (2).
To prevent damage to pumps and motors, it is very important that the pump cases be filled with hydraulic oil at least to the fill port before operation.
Illustration 16. Cross Section Of Pump Rotating Group (2) Spacer. (5) Center pin. (8) Bearing assembly. (12) Spacer. (13) Centering pin. (16) Shim. (D) Dimension needed for preload (E). (E) Preload determined by spacer (2). (F) Dimension determined by shim (16).Preload (E) between spacer (2) and pin (5), in combination with compression springs (6), maintains the correct limit of separation between barrel (3) and port plate (1) (lift-off limitation). This limits leakage during heavy, transient loading of the pump.
When servicing the hydraulic group, there are two critical dimensions. Dimension (D) is determined by one of nine sizes of spacer (2). Dimension (F) is determined by one thickness of shim.
Displacement Angle & Bearing Preload Adjustment
Illustration 17. Setup Of Dial Indicator Group [Tool (B)]. (17) Gauge blocks [Tool (A)].1. Position Tool (A) gauge blocks (17) on a surface plate to get dimension (F) of 86.50 mm (3.406 in). Position Tool (B) over the gauge blocks, and zero the indicator.
Illustration 18. Measurement For Shim Thickness (8) Bearing assembly. (16) Shim.2. Position the bearing assembly on surface plate. Slide the bearing assembly and support under Tool (B). Add shims (16) to get a reading on the indicator between 0.00 and -0.05 mm (.000 and -.002 in).Thickness of shims (16):
5 I-4480 .......... 6.9 mm (.244 in)5 I-4481 .......... 6.30 mm (.248 in)5 I-4482 .......... 6.40 mm (.252 in)5 I-4483 .......... 6.50 mm (.256 in)5 I-4484 .......... 6.60 mm (.260 in)
Illustration 19. Stub Shaft Group (8) Bearing assembly. (16) Shim. (18) Shaft. (9) Bearing assembly. (19) Nut. The following adjustment procedure for bearing preload applies only to new bearings with the manufacturer's lubricant.
Illustration 20. Locally fabricated tools. (22) Bearing Support. (23) Piston Retaining Plate. (24) Rotating Group Holding Tool. Rotating group holding tool (24) and bearing support (22) will be required when setting the bearing preload of the rotating group. These tools must be fabricated. To fabricate