Disassembly of Traction Pump (Fig. 21)
Figure 21
1. End cap 16. Screw 30. Seal carrier
2. Plug 17. Trunnion cover 31. O-ring
3. 18. O-ring 32. Retaining ring
4. O-ring 19. Trunnion spacer 33. Pump housing
5. Conical spring 20. Shim 34. Lip seal
6. Retaining ring 21. Roller bearing 35. Trunnion cover
7. Relief valve 22. O-ring 36. Swash plate
8. Charge relief poppet 23. O-ring 37. Thrust plate
9. Spring 24. Washer 38. Cylinder block
10. Shim 25. Capscrew 39. Valve plate
11. O-ring 26. Pump shaft 40. Pin
12. Charge relief plug 27. Ball bearing 41. Coupling
13. Needle bearing 28. Retaining ring 42. Plug
14. End cap gasket 29. Lip seal 43. Pin
15. Pin 30. Seal carrier
Clean parts by using a clean solvent wash and air leum jelly before assembly. All gasket sealing surfaces
drying. Keep parts free of foreign materials and chemi- must be cleaned before installing new gaskets.
cals. Protect all sealing surfaces and open cavities from
damage and foreign material. 1. Before performing major repairs on the pump, remove
external components as described in previous proce-
Dur
ing assembly of the pump, all surfaces which have dures. These include the Charge Check / High Pressure
relative motion between two parts should be coated with Relief Valves and Charge Relief Valve.
a film of clean hydraulic oil. This will assure that these
surfaces will be lubricated during start-up. 2. Remove pin (Item 43) from coupling (Item 41) on
output end of pump shaft. Remove the coupling.
It is recom
mended that all gaskets, o-rings and seals be
replaced. Lightly lubricate all o-rings with clean petro- 3. Remove four (4) screws (Item 25) which retain end
cap to pump housing.
Repairs Pa
ge 4 - 32 Groundsmaster
®
455-D
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