Fabhtcheartú Eaton Gears Transmission & shafts
clashing Gears
Snubbing and clashing gears while shifting are frequent abuses to which unsynchronized transmissions are subjected. Light snubbing will do little damage. The real damage is done by the hard clash shift caused by engaging gears which are far out of synchronization. This can break pieces of metal from the ends of the clutching teeth. Clashing gears can be traced to one of three causes:
Snubbed Fiacla clutching Gear
1. Feasacht & rochtain feabhsaithe míchuí
This applies to drivers who are not familiar with the shift pattern or have not learned the RPM spread between shifts.
2. clutch
Clashing when starting up in first or reverse gear can be caused by insufficient clutch clearance or a dragging clutch not releasing properly. This makes the transmission countershafts and mainshaft gears continue rotating while the clutch pedal is depressed. Clashing results when the nonrotating sliding clutch is forced to mesh with a rotating mainshaft gear. Double clutching during lever shifts will also reduce snubbing and clashing.
3. táimhe Fórsa
Countershafts agus trealamh mainshaft ghnáth ó 3 chun 5 soicind chun stop rothlach tar éis an clutch a bheith scoite. Ag iarraidh a mogalra giar clutch le fearas mainshaft roimh an fearas mainshaft stadanna mar thoradh clashing. Mura bhfuil an tarchur feistithe le coscáin clutch nó coscáin countershaft, is gá chun sos cúpla soicind tar éis depressing an gcos clutch roimh ag iarraidh rannpháirtíocht tosaigh an tarchuir.
Marcanna Déantúsaíocht
Sometimes gears are replaced or thought to be defective because of marks left on the gear by manufacturing processes. Tá na blemishes, ach, do not contribute to gear failure and the gear should not be replaced because of these marks.
Hob Marks
These are cutting marks or lines formed during the initial cutting of the gear teeth. Hob marks on the tooth face will be removed by the shaving process, but hob marks in the root of the tooth will most likely remain, and may be found even on gears with much wear on them.
Marcanna bearrtha
The shaving operation leaves distinct diagonal marks on the face of the gear tooth. These marks can be distinguished from scoring marks by the fact they are diagonal, while scoring marks are more nearly vertical. Most shaving marks are removed during normal gear operation.
Gear Lipping
Lipping nó bearradh burrs, is the formation of “lips” at the tip of the gear teeth machining. Na "liopaí" Beidh aon dochar don fearas.
Creathanna Gear ag Díomhaoin
Mainshaft gears are designed to have a specified amount of axial clearance which allows them to rotate freely on the mainshaft. The amount of clearance is governed by the use of washers. Is féidir le inneall réchasta garbh a chur ar bun vibrations, causing the mainshaft gears to rattle as they strike mating gears. This condition can usually be cured by improving the idling characteristics of the engine. Tolerance washers may have to be changed to bring the axial gear clearance to within tolerance on high mileage units. See the service manual for procedure and specifications.
Twist seafta agus Bristeacha
Failure of transmission shafts through fracturing or twisting is caused when stresses are imposed on them which are greater than they were designed to withstand. The main causes for these failures are:
- Teicnící clutching míchuí.
- Ag tosú i ró-ard de fearas.
- lugging.
- Ag iarraidh a thosú le coscáin ghlas.
- Transmission used for application it was not designed to withstand.
- Bumping isteach duga nuair a tacaíocht.
- gléasta míchuí ar 5 roth adjustable.
bhriste Mainshaft
Mar is amhlaidh le fiacla fearas, shafts may fracture as a result of fatigue or impact.
Twisted Mainshaft
Loads not severe enough to cause shaft fractures may cause the shaft to twist.
aon cuid tarchurtha ní mór duit ní mór dúinn é! loingseoireachta lá céanna ar fáil, ar fud an domhain.
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