Case 580SR, Service Manual

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8 SECTION 17 - TORQUE CONVERTERS
2.2 SPECIFICATIONS
Torque converter ratio............................................................................................................................... 2.38:1
Torque of retaining screws for transmission .............................................................................................26 Nm
Torque of retaining screw for flywheel ......................................................................................................43 Nm
Torque of screw for drive plate..................................................................................................................43 Nm
Hydraulic tests
Tachometer setting .............................................................................................................................. 2200 rpm
Test temperature, oil ............................................................................................................................. 82-93 °C
Torque converter relief valve..................................................................................................................... 10 bar
Oil temperature converter out:
Normal operating range .............................................................................................................. 80-90 °C
Maximum temperature ................................................................................................................... 120 °C
2.3 OVERHAUL
The torque converter, is a welded unit and cannot be
disassembled. The only maintenance performed on
the converter, other than the stall test, is cleaning
and visual inspection. A commercial torque convert-
er cleaner may be used to clean the converter. How-
ever, if a commercial cleaner is not available, the
converter should be cleaned as outlined below.
Z
Drain as much oil as possible from the hub of the
converter by tilting the converter in all directions.
Z
Fill the converter about half full, through the hub
(1), with paraffin base solvent or any cleaning sol-
vent specified for cleaning transmissions.
Z
Plug the opening in the hub, then circulate the sol-
vent inside the converter by rotating and shaking.
Z
Drain the solvent from the converter.
Z
Repeat previous steps, as required, until the sol-
vent that is drained from the converter is clean.
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