イートントランスミッションギアのトラブルシューティング & シャフト

衝突歯車

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 clutching gear teeth

あしらわクラッチギアの歯

1. 不適切なシフティング

This applies to drivers who are not familiar with the shift pattern or have not learned the RPM spread between shifts.

2. クラッチ

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. 慣性力

副軸と主軸ギヤは通常から取ります 3 に 5 クラッチが解放された後に回転を停止する秒. 主軸歯車の前に主軸歯車とクラッチギアメッシュしようとすると、衝突が発生します停止します. 変速機は、クラッチブレーキ又はカウンタシャフトブレーキが装備されていない場合, 送信の初期係合を試みる前に、クラッチペダルを踏み込ん数秒後に一時停止する必要があります.

製造業マークス

Sometimes gears are replaced or thought to be defective because of marks left on the gear by manufacturing processes. これらのシミ, しかしながら, do not contribute to gear failure and the gear should not be replaced because of these marks.

ホブマークス

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.

シェービングマークス

shaving marks on gear

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.

ギアLipping

ギアLipping

Lippingまたはシェービングバリ, is the formation of “lips” at the tip of the gear teeth machining. これらの「唇が」ギアに害を行いません.

アイドル時のギアラトル

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. ラフアイドリングエンジンは振動を設定することができます, 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.

シャフトツイストと破壊

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:

  1. 不適切なクラッチ技術.
  2. ギアの高すぎる以降.
  3. 持ち歩きます.
  4. ロックブレーキを開始しようとすると、.
  5. Transmission used for application it was not designed to withstand.
  6. バックアップ時のドックに衝突.
  7. 調整可能な第5輪の取りつけ.
fractured mainshaft

骨折主軸
歯車の歯と同様に, shafts may fracture as a result of fatigue or impact.

twisted mainshaft

ツイスト主軸
Loads not severe enough to cause shaft fractures may cause the shaft to twist.

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