In October 2006, Mitsubishi filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Drivetrain / Power Transfer, covering the Motor Grader. The filing affects 458 vehicles manufactured between July 31, 1990 and March 20, 2006.
Overview
| MLIT filing number | 1117570 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | October 18, 2006 |
| Manufacturer(s) | Mitsubishi |
| Component | Drivetrain / Power Transfer |
| Production period | July 31, 1990 — March 20, 2006 |
| Vehicles affected | 458 units |
Filing in context
The Drivetrain / Power Transfer is the most frequently cited component category in this archive, appearing in 2 of its 4,890 filings. This filing is one of 70 Mitsubishi notifications from 2006 in this archive. For scale, 3,194 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 15 years and 7 months.
Defect
Issue 1: In the transmission, insufficient oil supply to the transfer case causes inadequate lubrication. Continued operation allows the gears and bearings inside the transfer case to seize, and in the worst case, the vehicle becomes inoperable. Issue 2: In the transmission hydraulic circuit, the relief valve for the oil cooler is improperly shaped, causing the relief valve to malfunction. This reduces oil supply to the transfer case, leading to inadequate lubrication. Continued operation allows the gears and bearings inside the transfer case to seize, and in the worst case, the vehicle becomes inoperable.
Corrective action
On all vehicles, add a forced lubrication assembly and replace the relief valve with a corrected part.
Affected models & chassis ranges
This filing lists 4 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 |
|---|---|---|
| 4GA | Motor Grader | 4GA00002 — 4GA00618 |
| 4GB | Motor Grader | 4GB00001 — 4GB00162 |
| 4GC | Motor Grader | 4GC0001 — 4GC00039 |
| SC-4GC | Motor Grader | 4GC0001 — 4GC00039 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
①変速装置において、トランスファ部へのオイル供給量が不十分なため、潤滑不良を起こす場合がある。そのため、そのまま使用を続けると、トランスファ内部のギヤ及びベアリングが焼き付き、最悪の場合、走行不能に至るおそれがある。 ②変速装置において、油圧回路のオイルクーラ用リリーフバルブの形状が不適切なため、リリーフバルブが作動不良を起こしトランスファ部へのオイル供給量が不十分となり、潤滑不良を起こす場合がある。そのため、そのまま使用を続けると、トランスファ内部のギヤ及びベアリングが焼き付き、最悪の場合、走行不能に至るおそれがある。
改善措置
全車両、強制潤滑装置一式を追加及び、リリーフバルブを対策品に交換する。
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=3001479
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Drivetrain / Power Transfer, closest to this one by filing date.
Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Seat — affects 186 vehicles.
Open recall detail →Fuse — affects 1,079 vehicles.
Open recall detail →All Mitsubishi recalls · All 2006 recalls · Recall Archive home