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

1987 Isuzu Marine Diesel Engine UM4B Series Workshop Manual: diagnostics, service, and parts for UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC. Publication IM-WE-4BD1-001.

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Document Details

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Document Number / Seller:
26142 / Matthew Stewart
File Size:
45.99 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Inboard Engine (Sterndrive)
Last updated / verified
Feb 9, 2025

Models Covered & Key Technical Specifications

Inboard Engine (Sterndrive) UM4BB1 / UM4BD1 / UM4BD1-II / UM4BDIT / UM4BDIT-II / UM4BD1TC (IM-WE-4BD1-001) -- 1987 Engineering Registry & Primer Volume.

  • System Fluid Levels: The cooling system requires 9.2L capacity for optimal operation Framework.
  • Maximum Adjustment Range: 0.4 - 1.3 mm establishes the valve clearance limit Logic.
  • Measured Energy Draw: 40 +5C defines the optimal oil temperature Benchmarks.
  • Published Specific Fuel Consumption: 0.33 g/ps.hr governs the fuel efficiency Range.
  • Authorized Burn-in Temperature: 60 C signifies the initial operating temperature Sequences.
  • Technical Storage Capacity: The crankcase holds 3.7L of oil for standard operation Baseline.

Professional Workshop Service Manual & Technical Specifications

Technical Installation Safety Manual: Inboard Engine (Sterndrive) Workshop Essentials: Isuzu UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC Manual ((1987 Edition)) Specification-Guide

Year-Coverage: 1987 // Conceptual-Layout: Marine / Engine Logic // Year-Coverage: Specifications

Component Baseline Logic
Engine Type Water cooled, 4 cycle, inline 4 cylinder, over-meshed valve Dry chrome coated metal
Max. Output 125ps/2700rpm -
Measurement (LxWxH) (mm) 1077x721x967 3856cc
Weight (DRY) (kg) 568 -
Oil Capacity (L) 7.2L API classification CC grade
Cooling type Pressurized circulation type (with oil cooler) Approx 13L

Providing a structural breakdown of the Isuzu UM4BB1, UM4BD1, UM4BD1-II, UM4BDIT, UM4BDIT-II, UM4BD1TC marine diesel engines. This manual covers general repair instructions, engine assembly, lubrication, cooling, fuel, and electrical systems. It details diagnostic procedures and component overviews necessary for maintenance and repair.

Systems

Reference data is included for all major engine systems, including the lubricating, cooling, fuel, and electrical systems. The manual outlines the function and interconnections of key components within each system.

Procedures

This manual covers disassembly, inspection, renewal, and assembly procedures for critical engine components. It includes guidance on checking tolerances, adjusting settings, and performing common repairs.

Introduction

The "Workshop Essentials" manual provides essential information for servicing the Isuzu UM4B series marine diesel engines. It is designed to assist technicians in performing repairs and maintenance accurately.

Table

See the Technical Specs Table above for a summary of key engine specifications and configurations.

Specifications

This document provides detailed specifications for various engine components, including dimensions, clearances, and torque values required for proper assembly and function.

This manual documents torque specifications for flange face sealing to ensure proper component mating and prevent leaks.

FAQ

Reference the **specified** tool requirements for valve adjustment? keyboard_arrow_down

5.24mm is the standard length for the spring when compressed to the specified limit for the inner valve spring.

What are the **essential** electrical values for the generator? keyboard_arrow_down

24 V nominal voltage and 15 A rated current are the essential electrical values for the generator's operation.

Specify the **correct** calibration settings for the injection pump? keyboard_arrow_down

1.6 kg/cm² is the transfer pump pressure setting for the UM4BD1TC injection pump, as detailed on page 95+.

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