In November 2009, Hino filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Pressure control/transmission unit, covering the Blue Ribbon II. The filing affects 362 vehicles manufactured between March 22, 2006 and December 25, 2006.
Overview
| MLIT filing number | 1124230 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | November 26, 2009 |
| Manufacturer(s) | Hino |
| Component | Pressure control/transmission unit |
| Production period | March 22, 2006 — December 25, 2006 |
| Vehicles affected | 362 units |
Filing in context
The Pressure control/transmission unit is the most frequently cited component category in this archive, appearing in 14 of its 4,890 filings. This filing is one of 29 Hino notifications from 2009 in this archive. For scale, 3,297 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 9 months.
Defect
On large route buses, improper cleaning of the brake lines allows contaminants to enter the brake fluid, causing brake fluid to leak from the brake booster (air master). Continued operation allows the contaminated fluid to degrade the rubber components in the hill start aid (HSA) system and the ABS modulator. In the worst case, the brakes may become impossible to release.
Corrective action
On all vehicles, confirm whether the air master has been previously replaced. On vehicles where no replacement has been performed, inspect the air master, HSA valve, and ABS modulator. On any unit showing brake fluid leakage, replace the affected parts with new components and flush the air lines.
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 |
|---|---|---|
| PJ-KV234L1 | 日野ブルーリボンⅡ | KV234L1-7000307 — KV234L1-7000495 |
| PJ-KV234N1 | 日野ブルーリボンⅡ | KV234N1-7000127 — KV234N1-7000312 |
| PJ-KV234Q1 | 日野ブルーリボンⅡ | KV234Q1-7000057 — KV234Q1-7000150 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
大型路線バスの制動装置において、ブレーキ配管の洗浄が不適切なため、ブレーキ液に混入した異物により、倍力装置（エアマスター）からブレーキ液が漏れることがある。そのため、そのままの状態で使用を続けると、坂道発進補助装置（ＨＳＡ：ヒル・スタート・エイド）及びＡＢＳモジュレータのゴム部品が侵され、最悪の場合、ブレーキが解除できなくなるおそれがある。
改善措置
全車両、エアマスターの交換履歴の有無を確認し、交換されていない車両については、エアマスター、ＨＳＡバルブ並びにＡＢＳモジュレータを点検し、ブレーキ液が漏れているものは、当該部品を新品と交換するとともに、エア配管を洗浄する。
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=3002226
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