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EATON
620 Mobile Open Circuit Piston Pump Service Manual E-PUPI-TS018-E2 November 2017
Shimming process
Kit 9900776-000
Shimming Process
Installation Information
This shim kit is to replace
the crush ring within the
pump end cover .
If the housing, drive shaft,
shaft bearings or end cover
is replaced during servicing,
the original can no longer be
used to assure proper bear-
ing set .
Shimming procedures
1 . Measure the thickness of
the existing crush ring .
2 . To obtain a starting point,
stack shims to a few
thousandth of an inch less
than the measurement
of existing crush ring .
Then insert shims in to
the housing in the same
location as the removed
crush ring .
3 . Assemble the housing
shaft bearings, shaft and
end cover . Install the end
cover cap screws and
torque to 384+/- 28 N .m .
4 . Using a dial indicator,
measure drive shaft end
play . Target shaft end play
range is .001” to .003”
( .03 to .08 mm) clearance .
Add shims to achieve
proper shaft end play .
If no movement of the
shaft is observed, shims
will needs to be removed
and steps 3 and 4 be
repeated .
5 . Finish the assembly of
the pump .
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