In January 2014, Mitsubishi & UD Trucks filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Engine (General), covering the Aero ACE, Aero Queen and 2 more models. The filing affects 1,542 vehicles manufactured between August 30, 2010 and October 23, 2013.
Overview
| MLIT filing number | 1132890 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | January 30, 2014 |
| Manufacturer(s) | Mitsubishi, UD Trucks |
| Component | Engine (General) |
| Production period | August 30, 2010 — October 23, 2013 |
| Vehicles affected | 1,542 units |
Filing in context
This notification is a joint filing by 2 manufacturers: Mitsubishi & UD Trucks.
The Engine (General) is the most frequently cited component category in this archive, appearing in 48 of its 4,890 filings. This filing is one of 56 Mitsubishi notifications from 2014 in this archive. For scale, 2,553 of the 4,890 filings in this archive report a larger number of affected vehicles; the vehicles involved here were manufactured over a span of about 3 years and 1 month.
Defect
On large buses, the idler pulley assembly was improperly assembled—specifically, the bearing press-fit and related operations were not performed correctly—resulting in excessive rotational resistance in affected pulleys. Continued use causes the bearing to develop abnormal noise and seizure. In the worst case, the pulley belt breaks and the engine overheats.
Corrective action
Inspect all vehicles for idler pulley play and rotational resistance. On any pulley where resistance exceeds the specified value, replace the bearing with a new one. If rotational resistance still exceeds the specified value after bearing replacement, replace the complete pulley bracket assembly with a new unit.
Affected models & chassis ranges
This filing lists 3 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 |
|---|---|---|
| LKG-AS96VP | スペースアロー Ａ | AS96VP-20001 — AS96VP-20016; AS96VP-20005 — AS96VP-20017 |
| LKG-MS96VP | ふそうエアロエース | MS96VP-20012 — MS96VP-20571; MS96VP-20001 — MS96VP-20556 |
| QRG-MS96VP | ふそうエアロエース | MS96VP-20002 — MS96VP-23553; MS96VP-20586 — MS96VP-23536 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
大型バスにおいて、アイドラプーリー組立（ベアリングの圧入等）が不適切なため、当該プーリーの起動力（抵抗力）が過大なものがある。そのため、そのままの状態で使用を続けると、ベアリングに異音や焼付きが発生し、最悪の場合、ファンベルトが切れてオーバーヒートに至るおそれがある。
改善措置
全車両、アイドラプーリーのガタと起動力を点検し、規定値を超えているものはベアリングを新品に交換する。なお、ベアリングを新品に交換してもプーリーの起動力が規定値を超えるものは、プーリーブラケット一式を新品に交換する。
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=3003190
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Engine (General), closest to this one by filing date.
Engine (General) — affects 2,129 vehicles.
Open recall detail →Engine (General) — affects 20,328 vehicles.
Open recall detail →Engine (General) — affects 2 vehicles.
Open recall detail →Engine (General) — affects 1,808 vehicles.
Open recall detail →Engine (General) — affects 40,316 vehicles.
Open recall detail →Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Rearview Mirror — affects 1,121 vehicles.
Open recall detail →Rearview Mirror — affects 3,024 vehicles.
Open recall detail →Other (body/frame) — affects 4,542 vehicles.
Open recall detail →Lubrication system — affects 18,200 vehicles.
Open recall detail →Engine Assembly — affects 22,082 vehicles.
Open recall detail →All Mitsubishi recalls · All UD Trucks recalls · All 2014 recalls · Recall Archive home