Volvo Penta TAMD61A-TAMD72WJ-A Marine Diesel Engine Workshop Manual (P/N 7735718-4)

This 88-page PDF is Volvo Penta’s English Group 21 Engine Body Workshop Manual, Publication No. 7735718-4, issued in August 1996. It covers the standard versions of TAMD61A, TAMD62A, TAMD63L-A, TAMD63P-A, TAMD71A, TAMD71B, TAMD72A, TAMD72P-A, and TAMD72WJ-A. Written primarily for Volvo Penta service workshops and qualified personnel, it assumes basic knowledge of marine propulsion systems and mechanical/electrical repair, along with access to a properly equipped workshop and the specified service tools.

• Covers engine condition assessment, cylinder-by-cylinder compression testing, preparations for in-boat or out-of-boat overhaul, and mounting the engine on a stand with the specified support jig.
• Details cylinder-head removal, stripping, pressure testing, inspection, resurfacing, seal-groove milling, valve-guide and valve-seat work, rocker-mechanism repair, and final assembly.
• Includes copper injector-sleeve extraction, seat cleaning, sleeve installation, and valve-clearance adjustment, with separate tooling and procedures for the 6(x) and 7(x) engines and additional TAMD63 restrictions.
• Follows the pistons, connecting rods, wrist pins, piston rings, and wet cylinder liners through removal, inspection, measurement, honing, liner-seat renovation, and reassembly.
• Documents timing-gear disassembly and alignment, timing-cover sealing, polygon-hub and seal service, camshaft removal, wear measurement, valve-lifter inspection, and camshaft-bearing replacement.
• Provides crankshaft and bearing inspection and repair coverage, including crack checking, straightening and grinding requirements, cylinder-block inspection, bearing-shell replacement, flywheel and ring-gear service, runout checks, and rear crankshaft-seal replacement.

Model and Component Differences

The design-difference chapter separates the TAMD61A and TAMD62A, TAMD63L-A and TAMD63P-A, TAMD71A and TAMD71B, and the TAMD72 variants instead of treating them as interchangeable. It identifies changes involving piston profiles, liners and rings, valve seats, oil coolers, turbocharger and wastegate arrangements, seawater-pump drive, injection hardware, and electronic control equipment. The TAMD72WJ-A is identified as the water-jet version, while the TAMD72P-A uses Electronic Diesel Control (EDC).

Piston-ring coverage distinguishes the 6(x) series, early and later TAMD71 builds, the TAMD71B Keystone-ring arrangement, and the different top ring used on TAMD72 engines. The manual also records the different cylinder-liner seal-kit designs and identifies the locations and materials of their color-coded O-rings—important information when inspecting an engine that may have an earlier seal configuration.

Workshop Data, Tools, and Illustrations

The manual supplies a general tightening table plus procedure-specific torque and angle-tightening data, sealant and locking-compound information, liner-height checks, camshaft measurements, crankshaft inspection limits, bearing-size guidance, and component wear criteria. Some complete dimensional specifications are cross-referenced to the separate Volvo Penta Technical Data volume rather than duplicated in this engine-body manual.

Volvo Penta service tools are listed with their part numbers and applications. Examples include 9996662 pressure-test equipment, 9996645 cylinder-liner extractor, 9996772 camshaft wear-check tool, 9998079 camshaft handling tool, and 9996437 rear crankshaft-seal installer. The tool section also covers model-specific mandrels, drifts, cutters, press tools, and fixtures for cylinder heads, injector sleeves, connecting rods, liners, and the crankshaft assembly.

Useful technical illustrations include the Cylinder Head Sealing section view, comparative Piston Ring Profiles, the complete Timing Gear layout, the Crankshaft with Connecting Rods and Pistons assembly, the Torsional Damper section view, and component-location presentations for individual engine variants.

Repair Cautions and Manual Scope

The manual specifies that a damaged TAMD63 cylinder head must be replaced rather than resurfaced, and that the upper block faces on TAMD63 and TAMD72 engines must not be planed because the resulting clearance changes can bring pistons, valves, and injector nozzles too close together. It also warns that turning the crankshaft or camshaft with the timing gears removed and the cylinder heads installed can cause piston-to-valve contact; incompatible nitrocarburized and quenched-and-tempered timing gears must not be run together.

Safety coverage addresses engine isolation, lifting, closed seacocks, hot fluids, rotating components, and the special handling required for heat-damaged fluorocarbon seals. These repair procedures should be performed with the workshop equipment, lifting capacity, and service experience assumed by Volvo Penta.

This is specifically the Group 21 Engine Body volume. Fuel-injection-system overhaul and calibration, lubrication-system repair, inlet/exhaust and cooling-system service, electrical wiring diagrams, and operating instructions are covered in separate Volvo Penta publications and are not part of this PDF.