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Inspection, repair and
part replacement
End cover & associated parts
Swashplate parts
Shaft/housing parts
24
EATON 220 Piston Pump Service Manual E-SRSR-RR002-E August 2019
1. Inspect end cover for
erosion, cracks, and burrs.
Clean up minor burrs with
an India stone. If erosion or
cracks are found, replace
the end cover.
2. Inspect roller bearing and
bearing race for nicks and
pitting. Make sure the roller
bearing turns freely within
the bearing race. If the roller
bearing needs replacement,
both the roller bearing and
the bearing race must be
replaced.
1. Inspect swashplate face for
wear, roughness or scoring.
Check the swashplate hubs
and bearing surfaces for
wear and cracks. Replace if
defective.
1. Inspect drive shaft for wear,
stripped splines, and burrs.
Remove burrs with an India
stone. Inspect the contact
area of bearing and shaft
seal). Replace the drive shaft
if wear or scoring is greater
than 0.005 T.I.R. (total
indicator reading).
2. Inspect drive shaft bearing
for roughness, pitting of
rollers, and excessive end
play. Replace, if defective.
If the bearing needs to be
replaced, the bearing race
also requires replacement.
3. Inspect valve plate for
erosion, excessive wear,
heavy scratches, and
cracks. If any of the above
conditions are found,
replace the valve plate.
4. Inspect control piston and
maximum displacement
screw for burrs, scratches
and cracks. Clean up minor
scratches with 500 grit
paper. Remove burrs with
an India stone. The control
piston should move freely in
the bore.
2. Inspect saddle bearing
surfaces for wear, pitting,
and smooth operation.
Replace if necessary.
3. Inspect housing mounting
flange for nicks and burrs.
Remove minor nicks and
burrs with an India stone.
Also check the housing
for damaged or stripped
threads. If any thread is
damaged, replace the
housing.
4. Check remaining pump
parts for excessive wear,
damaged threads, burrs,
cracks and erosion.
Replace any part that is in
questionable condition.
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