Overview
| MLIT filing number | 1129251 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | April 17, 2012 |
| Manufacturer(s) | Isuzu |
| Component | Exhaust Pipe |
| Production period | February 17, 2000 — July 20, 2011 |
| Vehicles affected | 3,290 units |
Defect
On transit buses, the exhaust system vibration-damping design is inadequate. At specific engine speeds, the exhaust pipe and exhaust pipe brackets resonate and are subjected to excessive force. Continued operation allows cracks to develop in the exhaust pipe and brackets. In the worst case, exhaust gas may leak and noise levels may increase.
Corrective action
On all vehicles, install a vibration-damping damper on the exhaust pipe, replace the exhaust pipe and exhaust pipe brackets with corrected parts, replace the clamps with new units, and add spacers to the clamps. Inspect the clamp brackets and replace any that show cracks with new units.
Affected models & chassis ranges
This filing lists 7 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 |
|---|---|---|
| PDG-LR234J2 | ERGA | LR234J2-7000004 — LR234J2-7001356 |
| PDG-LV234L2 | ERGA | LV234L2-7000006 — LV234L2-7001135 |
| PDG-LV234N2 | ERGA | LV234N2-7000001 — LV234N2-7000750 |
| PDG-LV234Q2 | ERGA | LV234Q2-7000002 — LV234Q2-7000168 |
| PKG-LV234L2 | ERGA | LV234L2-7000006 — LV234L2-7001135 |
| PKG-LV234N2 | ERGA | LV234N2-7000001 — LV234N2-7000750 |
| PKG-LV234Q2 | ERGA | LV234Q2-7000002 — LV234Q2-7000168 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
路線バスの排気システムにおいて、振動吸収構造が不適切なため、特定のエンジン回転数で共振し、排気管及び排気管ブラケット等に大きな力が加わることがある。そのため、そのままの状態で使用を続けると、排気管及び排気管ブラケット等に亀裂が生じ、最悪の場合、排出ガスが漏れ、騒音が増大するおそれがある。
改善措置
全車両、排気管に振動吸収ダンパを取付け、排気管及び排気管ブラケットを対策品に交換し、クランプを新品に交換するとともに、クランプにスペーサを追加する。クランプブラケットを点検し、亀裂が生じているものは新品に交換する。
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=3002765