In April 2016, Mitsubishi & UD Trucks filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Drivetrain, covering the Aero Star, Space Runner A. The filing affects 23 vehicles manufactured between June 24, 2010 and September 2014.
Overview
| MLIT filing number | 1138080 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | April 26, 2016 |
| Manufacturer(s) | Mitsubishi, UD Trucks |
| Component | Drivetrain |
| Production period | June 24, 2010 — September 2014 |
| Vehicles affected | 23 units |
Filing in context
This notification is a joint filing by 2 manufacturers: Mitsubishi & UD Trucks.
The Drivetrain is the most frequently cited component category in this archive, appearing in 8 of its 4,890 filings. This filing is one of 47 Mitsubishi notifications from 2016 in this archive. For scale, 4,381 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 4 years and 3 months.
Defect
On large-capacity transit buses equipped with an automatic transmission, the torque converter backing plate attachment bolts and the thread machining on the torque converter cover are improper, resulting in insufficient clamping force on the bolts. Continued use may cause the bolts to fracture. A fractured bolt can become trapped between the torque converter cover and the turbine and, in the worst case, lock up the torque converter, causing an engine stall and rendering the vehicle inoperable.
Corrective action
Replace the backing plate attachment bolts with new ones on all vehicles and retighten them to the specified torque.
Affected models & chassis ranges
This filing lists 8 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-AP37FK | スペースランナーＡ | AP37FK-20003 — AP37FK-20017 |
| LKG-MP35FM | ふそうエアロスター | MP35FM-20001 |
| LKG-MP37FK | ふそうエアロスター | MP37FK-20040 — MP37FK-22029 |
| LKG-MP37FM | ふそうエアロスター | MP37FM-20003 — MP37FM-20027 |
| QKG-MP35FM | ふそうエアロスター | MP35FM-22071 — MP35FM-63505 |
| QKG-MP35FP | ふそうエアロスター | MP35FP-63517 |
| QKG-MP37FK | ふそうエアロスター | MP37FK-62209 — MP37FK-63087 |
| QKG-MP38FK | ふそうエアロスター | MP38FK-64041 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
自動変速機を搭載した大型路線バスにおいて、トルクコンバータ部バッキングプレートのトルクコンバータカバーへの取付けボルト締付け方法およびトルクコンバータカバーのねじ部加工が不適切なため、当該ボルトの軸力が不足しているものがある。そのため、そのままの状態で使用を続けるとボルトが折損し、折損したボルトがトルクコンバータカバーとタービンとの間に挟まり、最悪の場合、トルクコンバータがロックアップした状態となり、エンストして走行できなくなるおそれがある。
改善措置
全車両、バッキングプレート取付ボルトを新品に交換し、規定トルクで締め直す。
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=3009214
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Drivetrain, closest to this one by filing date.
Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Rearview Mirror — affects 3,024 vehicles.
Open recall detail →Computer (Engine) — affects 1,720 vehicles.
Open recall detail →Computer (Engine) — affects 1,720 vehicles.
Open recall detail →Exhaust gas reduction device — affects 260 vehicles.
Open recall detail →Other — affects 26 vehicles.
Open recall detail →All Mitsubishi recalls · All UD Trucks recalls · All 2016 recalls · Recall Archive home