Inspection of Traction Pump
Inspect the charge pump relief valve seat inside the
8. The pistons should move freely in the piston block
bore. If they are sticky in the bore, examine the bore for
scoring or contamination.
1.
charge pump adaptor. It should be smooth and free of
burrs or other defects.
9. Examine the O.D. of the pistons for finish condition,
they should not show wear or deep scratches. The
shoes should be snug fit on the ball end of the pistons.
The flat surfaces of the shoes should be flat and smooth.
DO NOT LAP THE PISTON SHOES.
2.
Inspect the charge pump relief valve poppet (42) and
spring (43).
3.
Inspect the gerotor pocket inside the charge pump
adaptor assembly (2). It should not be scored exces-
sively.
10.
no signs of wear in the pivot area.
Examine the spider. It should be flat, no cracks and
4.
Inspect the bearing (47) inside the charge pump
11.
Examine the pivot. It should be smooth and show no
adaptor assembly, if the needles are free of excessive
play and remain in the bearing cage there is no need to
replace the bearing.
signs of wear.
12. The camplate (14) should be inspected for the
condition of the finish of the polished shoe surface. It
should show no signs of scoring.
5.
Inspect the check valve assembly (8), make sure the
ball seat is in good condition and the ball is free to move.
13.
and spline areas.
Inspect the drive shaft (31) for fretting in the bearing
6.
Inspect the flat surfaces of the back plate (9), the fin-
ish on the gerotor side should show on galled surface.
The finish on the piston block side should be smooth and
free of grooves. The back plate should be replaced if it
shows any of the wear characteristics outlined above.
The cam stop should be tight in the back plate.
14. Inspect thrust bearing (30) and thrust race (29) for
wear.
15.
Inspect the needle bearing (6) in the housing as-
sembly. If the needles are free of excessive play and re-
main in the bearing cage, there is no need to replace the
bearing.
7.
Inspect the piston block. The surface that contacts
the back plate should be smooth and free of grooves.
Reelmaster 4000−D
Page 4 − 71
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro 4000 D, Toro 98958SL |
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| Document Type | Catalog |
| Language | English |
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