Overview
| MLIT filing number | 1111110 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | June 15, 2004 |
| Manufacturer(s) | Mitsubishi |
| Component | Propeller shaft |
| Production period | December 21, 1991 — April 10, 2002 |
| Vehicles affected | 266 units |
Defect
On large buses equipped with a hydraulic retarder (auxiliary braking device), the propeller shaft connection structure at the end yoke is inadequate. The bearing retaining stopper for the universal joint spider fitted to the end yoke wears through repeated vehicle starts and stops, or may be damaged during propeller shaft assembly. Continued use allows play to develop in the bearing, causing excessive propeller shaft vibration. In the worst case, the bearing retaining bracket or mounting bolts fracture and the propeller shaft detaches from the vehicle.
Corrective action
On all vehicles, replace the end yoke and spider assembly with corrected parts. Because full supply of corrected parts requires time, as an interim measure, inspect the affected bearing for play. Vehicles exceeding the maintenance tolerance are to receive corrected parts immediately; vehicles within tolerance are to receive corrected parts at a later date.
Affected models & chassis ranges
This filing lists 9 type code(s). A vehicle is affected if its chassis number falls within one of the ranges below.
| Type code (型式) | Model | Chassis ranges |
|---|---|---|
| KC-MS822P | Aero Bus | MS822P-14004 — MS822P-26145 |
| KC-MS822PA | Aero Bus | MS822P-14190 — MS822P-25256 |
| KC-MS829M | Aero Bus | MS829M-14004 — MS829M-14049 |
| KC-MS829P | Aero Bus | MS829P-14097 — MS829P-26178 |
| KL-MS86MP | Aero Bus | MS86MP-20001 — MS86MP-20857 |
| U-MS821P | Aero Bus | MS821P-10006 — MS821P-10937 |
| U-MS821PA | Aero Bus | MS821P-10005 — MS821P-20039 |
| U-MS826M | Aero Bus | MS826M-10044 |
| U-MS826P | Aero Bus | MS826P-10129 — MS826P-10740 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
流体式リターダ（補助制動装置）を装着した大型バスにおいて、プロペラシャフト接続部（ エンドヨーク）の構造が不適切なため、エンドヨークに設けてある十字継手（スパイダ）の ベアリング抜け出し防止用のストッパーが発進停止の繰り返しにより摩耗する、又はプロ ペラシャフト組立て時に損傷する場合がある。そのため、そのままの状態で使用を続ける と、ベアリングにガタを生じてプロペラシャフトが過大に振動し、最悪の場合、ベアリン グ固定金具又は取付ボルトが折損して、プロペラシャフトが脱落するおそれがある。
改善措置
全車両、エンドヨークとスパイダ一式を対策品に交換する。 なお、対策品の全数供給に時間を要するため、当面の暫定処置として当該ベアリング部の ガタを点検し、整備基準値を越えるものは対策品と交換し、整備基準内の車両は後日対策 品と交換する。
Source & verification
This entry reproduces public data from Japan's MLIT recall registry. English text is jdmvin.com's own translation; always verify against the official source:
https://renrakuda.mlit.go.jp/renrakuda/ris-detail-car.html?class=recalldatacar&id=3000761
Related
All Mitsubishi recalls · All 2004 recalls · Recall Archive home