MLIT Statutory Recall · Japan

Recall 1124230 — Pressure control/transmission unit

Filed November 26, 2009 · Hino

Overview

MLIT filing number1124230
TypeStatutory Recall (government-mandated recall)
Date filedNovember 26, 2009
Manufacturer(s)Hino
ComponentPressure control/transmission unit
Production periodMarch 22, 2006 — December 25, 2006
Vehicles affected362 units

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)ModelChassis 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

Check your own vehicle: to see whether this filing affects a specific chassis number — and find every other recall for it — use the chassis lookup on the home page.

Related

All Hino recalls · All 2009 recalls · Recall Archive home