5. Inspect the rotor (16) and vanes (15) for abnormal
wear or damage. There will be normal polish marks
on both the top and bottom. The vanes need to be
free to slide both up and down and in and out. If
vanes are removed for inspection, make sure to
reinstall them with the rounded edge out.
Inspect rotor and
vanes
Inspect bottom
plate
6. Check the bottom plate (17) for abnormal wear
patterns.
7. Check the input shaft (28) for damaged splines and
unusual wear or grooves around the shaft seal area.
Grooves you can detect with your fingernail necessi-
tate replacement of the input shaft.
The ball bearing (26) should exhibit free-rolling
operation.
Inspect input shaft/
Ball Bearing
8. Inspect spool components as follows: Check all
components for damage. Check the relief valve
seat assembly (6E) for wear or chipping. Back flush
with air and solvent if necessary. Check the spool
for nicks or burrs.
Inspect spool
components
Splines
Shaft Seal Area