Overview
| MLIT filing number | 1142021 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | February 22, 2018 |
| Manufacturer(s) | UD Trucks |
| Component | Shock absorber |
| Production period | April 28, 2017 — February 16, 2018 |
| Vehicles affected | 1,135 units |
Defect
On large-duty trucks equipped with air suspension and a ride-height adjustment system, the shock absorber piston structure is improperly designed. Lateral forces cause excessive contact pressure between the piston and cylinder wall, and repeatedly raising the vehicle to maximum ride height and lowering it during loading and unloading operations can score the inner cylinder wall at the piston ring groove. Continued use allows metal fragments to accumulate and adhere at the piston ring, causing bending or fracture of the shock absorber. In the worst case, the damaged shock absorber contacts the tire, causing a burst or generating heat sufficient to start a vehicle fire.
Corrective action
On all vehicles, replace the shock absorbers with the corrected parts. In addition, distribute a supplementary addendum to the owner's manual describing the operating characteristics of the ride-height adjustment system.
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 |
|---|---|---|
| 2PG-CD5BA | QUON | JNCMBN0C8HU021910 — JNCMB02C3JU028477 |
| 2PG-CD5CA | QUON | JNCMB02C2HU016413 — JNCMB02C9JU030489 |
| 2PG-CG5BA | QUON | JNCMB02G9HU025953 — JNCMB02G0JU028424 |
| 2PG-CG5CA | QUON | JNCMB02G3HU017251 — JNCMB02GXJU030763 |
| 2PG-CW5CA | QUON | JNCMB02D7HU022507 — JNCMB02D7JU030659 |
| 2PG-CX5BA | QUON | JNCMB02D6HU024538 — JNCMB02D5JU029669 |
| 2PG-GK5AAB | QUON | JNCMB22A4HU022644 — JNCMBP0A9JU031183 |
| 2PG-GK5AAD | QUON | JNCMB22A0JU027989 — JNCMBP0A3JU031566 |
| 2PG-GK5AAE | QUON | JNCMB22A7JU029657 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
大型トラックにおいて、 エアサスペンション仕様の車高調整装置装備車におけるショックアブソーバのピストン構造が不適切なため、横力によってピストンとシリンダの接触面圧が過大となり、荷役作業時等で最大車高まで上昇させ下降する動作を繰り返すと、ピストンリング溝部で内壁を傷つけることがある。そのため、そのままの状態で使用を続けると、当該ショックアブソーバのピストンリング部に金属片が溜まり固着して、曲りや折損が発生し、最悪の場合、タイヤと干渉してバーストまたは発熱により発火するおそれがある。
改善措置
全車両、ショックアブソーバを対策品と交換する。また、取扱説明書に車高調整装置の特性に関する記述の追補版を配布する。
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=3004194
Related
All UD Trucks recalls · All 2018 recalls · Recall Archive home