Case 2050M Stage IIIB Crawler Dozer description of the catalogue:

Crawler Dozer 2050M Stage IIIB workshop service manuals

2050M Extra Long Track (XLT), Bulldozer (BD) Blade - Tier 4B (final) and Stage IIIB [NGC109000 - ],
2050M Extra Long Track (XLT), Power Angle Tilt (PAT) Blade - Tier 4B (final) and Stage IIIB [NGC109000 - ],
2050M Long Track (LT), Bulldozer (BD) Blade - Tier 4B (final) and Stage IIIB [NGC109000 - ],
2050M Long Track (LT), Power Angle Tilt (PAT) Blade - Tier 4B (final) and Stage IIIB [NGC109000 - ],
2050M Wide Track (WT) / Low Ground Pressure (LGP), Bulldozer (BD) Blade - Tier 4B (final) and Stage IIIB [NGC109000 - ],
2050M Wide Track (WT) / Low Ground Pressure (LGP), Power Angle Tilt (PAT) Blade - Tier 4B (final) and Stage IIIB [NGC109000 - ]