Gravely 950001, Maintenance Manual

Page: 36 / 66

6 - 36
21.Inspect housing (18) assembly for cracks, the
machined surfaces for nicks, burrs or corrosion.
Remove burrs that can be removed without
changing dimensional characteristics. Inspect
tapped holes for thread damage. If the housing is
defective in these areas, discard the housing
assembly.
22.If the housing (18) assembly has passed
inspection to this point, inspect the housing
bearings/bushings (19) and (13) and check that
they are captured in the housing cavity between
the two thrust washers (14) and thrust bearing. The
bearing rollers must be firmly retained in the
bearing cages, but must rotate and orbit freely. All
rollers and thrust washers must be free of pitting
and corrosion. If the housing has passed, the
inspection of the disassembly of The Torqmotor is
completed.
NOTE: The depth of location of bearing/bushing (13) in
relation to the housing wear plate surface and the
depth or location of bearing/bushing (19) in relation to
the beginning of bearing/bushing counter bore should
be measured and noted before removing the bearings/
bushings. This will facilitate the correct reassembly of
new bearings/bushings.
23.If the bearings, bushing or thrust washers must be
replaced use a suitable size bearing puller to
remove bearing/bushings (19) and (13) from
housing (18) without damaging the housing.
Remove thrust washers (14) and thrust bearing
(15) if they were previously retained in the housing
by bearing (13).
The disassembly of the Torqmotor is completed.
Torqmotor Assembly
Replace all seals and seal rings with new ones each
time you reassemble the Torqmotor unit. Lubricate all
seals and seal rings with SAE 10W40 oil or clean
grease before assembly.
NOTE: Individual seals and seal rings as well as a
complete seal kit are available. See illustration below.
The parts should be available through most OEM parts
distributors or Ross approved Torqmotor distributors.
(contact your machine dealer for availability.)
NOTE: Unless otherwise indicated, do not oil or grease
parts before assembly.
Wash all parts in clean petroleum-based solvents
before assembly. Blow them dry with compressed air.
Remove any paint chips from mating surfaces of the
end cover, commutator set, manifold rotor set, wear
plate and housing and from port and sealing areas.
1. If the housing (18) bearing components were
removed for replacement, thoroughly coat and
pack a new outer bearing/bushing (19) with clean
corrosion resistant grease Ross gear grease
specification #045236, E/M lubricant #K-70M, or
equivalent.
Large Frame Series ME Torqmotor housings
require the use of a bearing mandrel to press
bearing (19) into the housing to a required depth of
.290/.310 inches (7.73717,87 mm) from the
outside end of the bearing counterbore.
NOTE: Bearing mandrel must be pressed against the
lettered end of bearing shell. Take care that the
housing bore is square with the base and the bearing/
bushing is not cocked when pressing a bearing/
bushing into the housing.
2. The large Frame Series ME Torqmotor housing
(18) requires that you assemble a new backup
washer (17), new seal (16) with the lip facing out,
new thrust washer (14), new thrust bearing (15),
and a new second thrust washer (14), in that order
before pressing in the inner housing bearing (13).
When these components are in place, press new
bearing (13) into the housing (18) to a depth of
105/125 inches (2.67/3.18) below the housing wear
plate contact face. Use the opposite end of the
bearing mandrel used to press in outer
bearing(19).
CAUTION: If the required bearing mandrel is
not available and alternate methods are used
to press in bearing/bushing (13) and (19) the
bearing /bushing depths specified must be
achieved to insure adequate bearing support
and correct relationship to adjacent
components when assembled.
CAUTION: Because the bearing/bushings
(13) and (19) have a press fit into the housing
they must be discarded when removed. They
must not be reused.
SEAL KIT