1987 Isuzu UM4BB1 / UM4BD1 / UM4BD1-II / UM4BDIT / UM4BDIT-II / UM4BD1TC Marine Diesel Engine Workshop Manual

Isuzu Marine Diesel Engines — Workshop Manual Coverage

• Built for owners and marine workshops servicing the 1987 Isuzu UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, and UM4BD1TC diesel engine series
• Official OEM publication IM-WE-4BD1-001, first edition issued September 1987
• Documents comprehensive internal specifications including 16 exploded-view assembly diagrams and 5 detailed injection pump calibration tables
• Downloads to your account within seconds of checkout
• Your order stays downloadable from your account for life
• Laid out for standard letter and A4 printing
• Full-text search finds any part number in seconds
• This official 120-page 1987 workshop manual serves as the primary technical reference for the 4B-series marine diesel lineup

Engine Assembly and Lubrication Reference

This 1987 Isuzu marine engine publication covers the assembly and maintenance parameters for the 4B series. The documentation details internal mechanical components, including the rocker arm assembly, crankshaft, camshaft, and piston-connecting rod groupings. It provides clear guidance for cylinder head assembly and cooling system maintenance, ensuring technicians can identify clearance standards and wear limits for all critical engine parts. The content includes a section on lubricating system circulation, featuring oil pump inspection requirements and relief valve adjustments.

Technical Specification Highlights

This manual provides essential data for engine tuning, including injection timing settings and valve clearance adjustment values. Cylinder head bolt torque values are documented in a multi-stage sequence, with specific lubrication instructions for standard versus reused components. Detailed fuel system data for the Diesel Kiki injection pump is provided, listing calibration speeds and rod positions for the entire 4B range. The cooling system capacity is documented at 13 liters, and the crankcase oil capacity is established at 9.2 liters for understanding engine maintenance specifications.

Note: All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This 120-page Isuzu workshop manual provides technical specifications and assembly data for the 1987 UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, and UM4BD1TC series marine diesel engines.