Disassembly and Inspection Procedures
PREPARATION BEFORE DISASSEMBLY
Before disconnecting hoses, thoroughly clean off all
outside dirt around fittings. (After disconnecting hoses
and before removing from vehicle, IMMEDIATELY plug
portholes.) Drain fluid and finish cleaning and drying
assembly before placing on a clean work surface. (A
piece of clean paper makes an excellent disposable
top.) All disassembled parts should be cleaned
separately in clean petroleum-based solvent and blown
dry with air to avoid nicks and burrs. Discard all seal
and seal rings as they are removed from Torqmotor.
Use Ross Gear Division or OEM approved service parts.
WARNING: SINCE THEY ARE FLAMMABLE,
BE EXTREMELY CAREFUL WHEN USING
INJURY OR DEATH.
WARNING: WEAR EYE PROTECTION AND
BE SURE TO COMPLY WITH OSHA OR
CAUTION: Never steam or high pressure
wash hydraulic components. Do not force
or abuse closely fitted parts.
REPLACEMENT OF HIGH PRESSURE SEAL (5)
(Reference Exploded Assembly View)
Remove and discard dirt seal (1) and retaining
ring (2) from Torqmotor. [Some applications
may not require dirt seal (1).]
Completely fill Torqmotor with oil. Plug "A" and
"B" ports and set Torqmotor in a clean pan.
Place a clean rag around the coupling shaft seal
area of the housing to prevent oil spray.
Carefully grip coupling shaft with appropriate
wrench and rotate coupling shaft rapidly in a
generated by Torqmotor will eject backup
washer (3), washer (4) and seal (5).
Select the proper seal assembly tools for the 1
1/4 inch (31.8 mm) or 1 1/2 inch (38.1 mm) seal
diameter coupling shaft involved. See Figures
1, 2 and 3, page 2.
Insert the selected seal compression ring tool
(Figure 3), with chamfered end inward, into
housing (6) until it bottoms out. Assemble the
selected seal thimble tool (Figure 1) over
coupling shaft (11). Coat new seal (5) with
clean grease and assemble over seal thimble
with lip side inward. Push new seal (5) into
housing (6) with the appropriate seal driver tool
(Figure 2). Remove seal driver, thimble and
Hold washer (4) between thumb and index
assemble into housing (6). Assemble back-up
washer (3) tab side out, and retaining ring (2).
Be sure rounded edge of retaining ring is faced
inward, and that back-up washer tab is between
ends of retaining ring. Be sure the new
retaining ring (2) is the same thickness as the
one removed. (Seal kit contains two retaining
rings to select from.) Apply a small amount of
clean grease to the back side of new seal (1)
and assemble into housing (6) if required.
(Reference Exploded Assembly View
Place Torqmotor in a vise, clamping down on
the housing (6) port bosses with the coupling
shaft (11) pointed down.
WARNING: IF THE TORQMOTOR IS NOT
FIRMLY HELD IN THE VISE, IT COULD BE
PROCEDURES, CAUSING INJURY.
If the end cover assembly (23) has a valve (28),
scribe a line on housing (6) in some manner in
line with the port in the end cover for
reassembly orientation. Loosen the two plugs
(25) with a 3/16 inch Allen wrench, for later
disassembly. Remove the seven special bolts
(24) using a 9/16 inch thin wall socket. Inspect
bolts for damaged threads, or the sealing ring
under the bolt head. Replace damaged bolts.
Remove end cover assembly (23) and sea! ring
(7) by inserting screwdriver between end cover
assembly and sleeve (22). Pry up end cover
assembly and lift from unit with seal ring
attached. Discard seal ring (7). It may be
necessary to use a chisel and hammer to break
the end cover loose.
If the end cover (23) has valve (28) and the
previously loosened plugs (25), remove the two
plugs and O-rings (26).
CAUTION: Be ready to catch two springs
(27) and valve (28) that will fall out of the end
cover valve cavity when the plug assemblies
Thoroughly wash cover in proper solvent and
blow dry. Be sure the cover valve apertures,
including the internal orifice plug, are free of
contamination. Inspect end cover for cracks
and the bolt head recesses for good bolt head
sealing surfaces. Replace cover as necessary.
NOTE: O-ring (26) is not included in seal kits
but is serviced separately if required.
Remove commutator ring (21), commutator
(19), seal ring (20), and manifold (18) by using
two of the special bolts (24) as a lifting tool-
insert the two special bolts Into two holes and lift
out the previously mentioned parts.
Remove seal ring (20) from commutator (19),
using an air hose to blow air into ring groove
until seal ring is lifted out and discard seal ring.
Inspect commutator and commutator ring (21)
for cracks or burrs. Inspect commutator for
wear, scoring, spalling or brinelling. If any of
these conditions exist, replace commutator and
commutator ring as a matched set.
Remove manifold plate (17) by again using two
special bolts (24) as a lifting tool. Inspect