Overview
| MLIT filing number | 2103590 |
|---|---|
| Type | Improvement Campaign (manufacturer improvement measure / 改善対策) |
| Date filed | August 9, 2007 |
| Manufacturer(s) | Mitsubishi |
| Component | Engine assembly |
| Production period | December 20, 1988 — July 21, 1997 |
| Vehicles affected | 1,078 units |
Issue
In the corrected parts supplied under Market Measure (Improvement Campaign No. 333), the taper cone that secures the crank pulley to the crankshaft was machined improperly, resulting in some taper cones with an excessive inner diameter. In addition, improper assembly instructions for the crank pulley allow it to be installed at an angle. These conditions create non-uniform engagement between the crank pulley and the taper cone, generating excessive stress in the crank pulley and causing cracks to develop. In the worst case, the crank pulley may fracture, causing the accessory belt to come off. Loss of the accessory belt may result in insufficient charging, rising coolant temperature, and increased steering effort.
Corrective action
On all vehicles, replace the crank pulley and taper cone with corrected parts. On vehicles on which the corrective action under Improvement Campaign No. 333 has not yet been performed, also replace the damper, damper mounting bolts, and water pump assembly with corrected parts, and inspect the crankshaft; if damage is found, replace the crankshaft with a conforming part.
Affected models & chassis ranges
This filing lists 1 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 |
|---|---|---|
| 2GA | Motor Grader | 2GA00002 — 2GA01445 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
市場措置（改善対策届出番号３３３）の対策品において、クランクプーリをクランクシャフトに固定するテーパコーンの加工が不適切なため、テーパコーンの内径が過大なものがあり、また、クランクプーリの組立作業指示が不適切なため、クランクプーリが傾いた状態で組み付けられることがある。そのため、クランクプーリとテーパコーンの嵌合が不均一になり、クランクプーリに過大な応力が発生し亀裂が発生して、最悪の場合、クランクプーリが破損し補機ベルトが外れ、充電不良や冷却水温度の上昇及びハンドル操作が重くなるおそれがある。
改善措置
全車両、クランクプーリ、テーパコーンを対策品と交換する。また、改善対策届出番号３３３による改善対策措置未実施の車両については、ダンパ、ダンパ取付ボルト、ウォーターポンプ一式を対策品と交換するとともに、クランクシャフトを点検し、損傷がある場合はクランクシャフトを良品と交換する。
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=3008725
Related
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