Eaton EEV-7202, Руководство по обслуживанию, Страница: 15 / 63

15
Assembly precautions
Make sure that interiors of all housings are clean. It is important that dirt be kept out of
transmission during assembly. Dirt is abrasive and can damage polished surfaces of bearings and
washers. Pay attention to certain precautions, as listed below, during assembly.
1. Gaskets - Use new gaskets where detailed only (neutral detent and remote control housing covers).
All other locations, ensure mating faces are clean and undamaged and apply a continuous bead of
recommended Loctite Sealant to one face only. Do not apply excessive sealant or allow it to penetrate
into the bearings.
2.
Capscrews - Use thread sealant on all capscrews. The corresponding torque ratings are to be
found in 'Torque Tightening Recommendations'.
3.
O-Rings -
Lubricate all O-rings lightly with silicone lubricant.
4.
Initial Lubrication - Lubricate bearings with gearbox oil during assembly.
5.
Axial Clearances - Maintain the end floats of mainshaft gears as detailed in the chart on the
following page.
6.
Bearings - Use of the correct special tools and bearing drivers is recommended for the installation
of bearings. Heating the bearing inner tracks where instructed will aid installation.
7.
Output Shaft Drive Flange -
Tighten the nut to the correct torque.
Do not under any circumstances use an impact wrench to tighten the flange/yoke nut. Use only a
hand operated torque wrench or a stall torque motor. Failure to carry out these instructions can cause
damage to the locking medium of the nut.
During disassembly and again during assembly prior to tightening the new nut, it is important to ensure
that the output shaft does not slide through the bearing, or the assembled range change synchronizer
roller, plungers and springs may be displaced.
A suitable spacer should be temporarily assembled under the nut to allow for the thickness of the nut
locking insert to ensure the shaft is firmly held in the bearing until the nut can be torque tightened.
8a. Synchronizer Hubs - Range synchronizer hub and must be heated to approximately 85°C before
installation. Press fully home and hold under pressure for a short period to prevent creep while cooling.
8b. All synchronizer flanges to be lubricated before assembly.
9. Sun Gear -
The sun gear is interference fit on the mainshaft splines and must be heated to approx.
130°C - 150°C (266°F - 302°F) before installation.