• To lock the fly-wheel and injection-pump pulley when changing timing chain or carrying repairs.
• Applicable: M21,M40,M41.M42,M43TU,M44,M47,M47TU,M50,M51,M52,M52TU,M54,M56,
M57,M57TU,M60,M62,M70,M73,S50B30,S50B32,S54,and S62
