Toro 98957SL Rev B Sand Pro 2020 3020 5020 Service Manual

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
67).
mm) of clearance, replace the entire rotor set (Fig.
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
on the shaft bearing areas (Fig. 69).
Figure 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).
Figure 70
Hydraulic System (Rev. A)
Sand Pro 2020/3020/5020
Page 4 – 65
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- 170 pages
Document TypeService Manual
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Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
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