16
X70 PLUG-IN MOTOR REPAIR MANUAL
E-MOPI-RR009-E—March 2019 www.eaton.com
Inspection, repair & Part replacement
End cover and associate parts:
•
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.
•
Check the bearing (press fit) in end cover. If needles
remain in cage, move freely, and setting is at the
dimension shown in figure 28, removal not required.
•
Check roll pin in end cover. If tight and set to the
dimension shown in figure 28, removal not required.
•
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.
•
Inspect valve plate for erosion, excessive wear, heavy
scratches, and cracks. If any of the above conditions are
found, replace the valve plate.
Swashplate Parts:
•
The finish on the piston shoe surfaces of the swashplate
should show no signs of scoring. Check the swashplate
hubs and bearing surfaces for wear and cracks and
surface for coating transfer from shoes. Replace if
defective.
•
Inspect cradle bearing surfaces for wear, pitting, and
smooth operation. Replace if necessary.
•
Inspect control piston 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 of end cover.
•
Inspect the control piston ring for any cuts, wear &
scoring. Replace the piston ring if found damage.
•
Use flat tip screw driver for removal of piston ring.
•
For installation of piston ring follow the sequence shown
in figure 29 & 30.
otee:
N
piston ring can be install easily if it is greased or oiled.
•
Once the piston ring is assembled on the piston, pass it
through the end cover bore for 3 to 4 times for setting
the piston ring.
Shaft/housing parts:
•
Inspect drive shaft for wear, stripped splines, and burrs.
Remove burrs with an India stone. Replace the drive
shaft if wear or scoring is greater than 0.005 T.I.R. (total
indicator reading).
•
Inspect drive shaft bearing for roughness, pitting of
rollers, and excessive end play. Replace, if defective. If
the bearing needs to be replaced, remove retaining ring
(part no 11) and replace the outer cone and rollers as
shown below. If inner cone has scoring or pitting entire
shaft sub assembly has to be replaced.
•
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.
•
Check remaining motor parts for excessive wear,
damaged threads, burrs, cracks and erosion. Replace any
part that is in questionable condition.
