Toro Sand Pro 5020 - Manual (Page 115)

6. Inspect manifold (22) for cracks, surface scoring,
peening, chipping. Replace manifold if any of these
conditions exist. A polished pattern on the ground sur-
face from commutator or rotor rotation is normal.
NOTE: The rotor set consists of the rotor (19), vanes
(20), and stator (21). Rotor set components may be-
come disassembled during service procedures.
7. Inspect rotor set in its assembled form for nicks,
scoring, and chipping on any surface. Inspect for broken
and worn splines. If the rotor set component requires
replacement, the complete rotor set must be re-
placed as it is a matched set.
Figure 67
8. Place rotor set and wear plate (18) on a flat surface
and center the rotor (19) in the stator (21) such that two
rotor lobes (180 degrees apart) and a roller vane (20)
center line are on the same stator center line. Check the
rotor lobe to roller vane clearance with a feeler gage at
this common center line. If there is more than 0.005 inch
(0.13 mm) of clearance, replace the entire rotor set (Fig.
67).
9. Inspect the wearplate (18) for cracks, peening, and
scoring. A polished pattern on the wear plate from rotor
rotation is normal. Replace as necessary.
10. Inspect drive link (13) for cracks and worn or dam-
Figure 68
aged splines. No perceptible backlash (play) should be
noted between mating spline parts of the rotor (19) or
coupling shaft (11). Replace as necessary (Fig. 68).
11. Inspect thrust bearing (12) for wear, peening, corro-
sion and a full complement of retained rollers. Replace
as necessary.
12. Inspect coupling shaft (11) internal and external
splines and keyway for damage and wear. Inspect bear-
ing and sealing surfaces of the coupling shaft for chip-
ping, nicks, grooves, severe wear, corrosion, and
discoloration. Replace coupling shaft if any of these
conditions exist. Minor shaft wear in seal area is permis-
sible. If wear exceeds 0.020 inch (0.51 mm) diametrical-
ly, replace coupling shaft. A slight ”polish” is permissible
Figure 69
on the shaft bearing areas (Fig. 69).
NOTE: Do not remove inner bearing (10), thrust wash-
ers (8), thrust bearing (9), and outer bearing (2) from the
housing (3). These parts should be inspected in place.
13. Inspect housing (3) for cracks. Inspect machined
surfaces for nicks, burrs, peening, and corrosion. Re-
move burrs that can be removed without changing di-
mensional characteristics. Inspect tapped holes for
thread damage. If the housing is defective in these
areas, discard the housing assembly (Fig. 70).
Hydraulic Systems
Figure 70
Sand Pro 2020/3020/5020 Page 4 – 65 Hydraulic System (Rev. A)