OEM reference TPD 01921273 serves as the factory source for the Prima, Prima Marine, and 500 Series four-cylinder diesel engines. Spanning 130 pages, this document supports vehicle, marine, and industrial applications with thorough rebuild procedures and exploded views covering every major assembly. Mechanics will find detailed system diagrams covering fuel, cooling, lubrication, and aspiration circuits. The manual provides wiring schematics for alternators, starter motors, glow plugs, and marine-specific electrical setups, backed by exact factory dimensions. Stop guessing at head tolerances and clearances — look them up here.
What's Inside This Perkins Prima, Prima Marine Manual
| System | Pages | Key Topics |
|---|---|---|
| Perkins Workshop Manual | 1 | - |
| Amendment Status | 2-3 | Number, Date |
| General Information | 4-8 | Introduction, Engine Identification, Safety Precautions, Asbestos Joints |
| Specifications | 9-25 | Basic Engine Data, Recommended Torque Tensions |
| Cylinder Head Assembly | 26-38 | General Description, Camshaft Cover, Tappet Clearances, Front Oil Seal of Camshaft, Camshaft, Valves and Valve Springs, Valve Guides |
| Piston and Connecting Rod Assemblies | 39-47 | Big End Bearing (Remove and to Fit, Inspect), Piston and Connecting Rod Assembly (to Remove and to Fit), Piston Rings (to Remove and to Fit), Piston and Rings (to Inspect) |
| Crankshaft Assembly | 48-57 | Crankshaft Pulley (to Remove and to Fit), Front Oil Seal (to Renew), Rear Oil Seal (Renew, Remove and to Fit the Separate Oil Seal Housing) |
| Timing Case and Drive Assembly | 58-66 | Timing Case Cover (to Remove and to Fit), Timing Belt (Check the Belt Condition and Tension, Adjust the Belt Tension, Remove and to Fit) |
| Cylinder Block Assembly | 67-70 | Cylinder Block (Dismantle and to Assemble, Inspect, Correct a Glazed Bore), To Dismantle and to Assemble, To Inspect, To Correct a Glazed Bore |
| Engine Timing | 71-74 | General Description |
| Aspiration System | 75-78 | Induction and Exhaust Manifolds (to Remove and to Fit), Turbocharger (to Remove and to Fit, Waste-Gate Unit) |
| Lubrication System | 79-85 | Filter Canister (to Renew), Filter Head (to Remove and to Fit), Lubricating Oil Sump (to Remove and to Fit) |
| Fuel System | 86-94 | General Description, Fuel Filter Canister, Lift Pump, Fuel Injection Pump |
| Cooling System | 95-105 | Coolant Circuit (Drain, Fill), Raw Water Circuit (to Drain), Thermostat (Remove and to Fit, Test), Water Pump (to Remove and to Fit) |
| Flywheel, Flywheel Housing and Marine Reverse Gearbox | 106-110 | Flywheel (to Remove and to Fit), Ring Gear (to Remove and to Fit), Flywheel Housing or Backplate (to Remove and to Fit), Reverse Gearbox for Marine Engines (to Remove and to Fit) |
| Electrical Equipment | 111-122 | Alternators, Starter Motors, Starting Aid, Wiring Diagrams (Precautions, Drive Belt, Alternator, Starter Motor, Glow Plugs, Marine Engines) |
| Auxiliary Equipment | 123-124 | Exhauster (Remove and to Fit, Test), To Remove and to Fit, To Test |
| List of Special Tools | 125-130 | Tension Gauge, Drive Belt, Alternator, Valve Seat Cutters, Adjustable Pilot, Remover/replacer, Oil Seals, Camshaft |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head setscrews torque (first stage) | 50 Nm (37 Ibf ft) 5,1 kgf m | p. 34 |
| Cylinder head setscrews torque (second stage) | 100 Nm (74 Ibf ft) 10,2 kgf m | p. 34 |
| Valve guide inside diameter (reamed in position) | 7,450/7,463 mm (0.2933/0.2938 in) | p. 16 |
| Valve guide interference fit in cylinder head | 0,04/0,08 mm (0.0016/0.0031 in) | p. 16 |
| Top ring width | 1,978/1,990 mm (0.0778/0.0783 in) | p. 18 |
| Second ring width | 1,73/1,74 mm (0.068/0.069 in) | p. 18 |
| Cylinder bore diameter | 84,442/84,469 mm (3.3245/3.3256 in) | p. 21 |
| Maximum permissible wear in bore | 0,15 mm (0.006 in) | p. 21 |
| Maximum resistance of battery cables 1 and 2 | 0.0017 ohms | p. 121 |
| Cylinder bore maximum wear before rebuild | 0,15 mm (0.006 in) | p. 70 |
| Cylinder bore oversize machining diameter | 0,50 mm (0.0197 in) | p. 70 |
| Nominal bore | 84,5 mm (3.33 in) | p. 11 |
Perkins Prima, Prima Marine Common Problems This Manual Covers
Perkins Prima and 500 Series diesel engine blows thick blue smoke at startup after sitting. p. 36
Remove the cylinder head and inspect the valve stems. Measure the clearance between the valve stem and the guide bore. Replace the guides if the clearance exceeds the maximum permissible limit of 0,13 mm (0.005 in) as specified on page 36. Torque the head setscrews to 50 Nm initially, as specified on page 34.
Manual Section: Cylinder Head AssemblyExcessive oil burn of one quart every 20 hours accompanied by thick exhaust smoke. p. 70
Inspect the cylinder block for glazed bores. Measure the cylinder bore diameter and check for wear. Machine the cylinders to the oversize diameter if wear exceeds the 0,15 mm (0.006 in) maximum limit shown on page 70. Install new piston rings and verify the top ring width, as specified on page 18.
Manual Section: Cylinder Block AssemblyElectrical faults causing dead batteries or poor charging from shore power connections. p. 121
Test the starting and charging circuits using a multimeter. Measure the resistance of battery cables 1 and 2 outlined on page 121. Replace any corroded wiring if resistance is greater than 0.0017 ohms. Check the alternator drive belt tension (page 114) and verify the connections at the starter motor are clean (page 117).
Manual Section: Electrical EquipmentHard starting in cold weather with no noticeable smoke or unburned fuel smell. p. 14
Check power supply and continuity across the starting aid circuit (page 119). Remove the glow plugs and test their operation (page 119). Install new plugs if defective and tighten them to the strict 20 Nm (15 lbf ft) 2,0 kgf m torque spec listed on page 14 to prevent thread damage.
Manual Section: Glow Plugs CheckFrequently Asked Questions
What are the torque specs for Perkins Prima/Prima Marine cylinder head bolts?
The cylinder head setscrews should be tightened in a specific sequence. First, tighten all setscrews to a torque of 50 Nm (37 Ibf ft) 5,1 kgf m. Then, tighten them again in the same sequence to 100 Nm (74 Ibf ft) 10,2 kgf m. Finally, tighten the setscrews another quarter of a turn (90°).
How do I troubleshoot a Perkins Prima Marine not starting?
If a Perkins Prima Marine engine will not start, first ensure the stop control lever on the fuel injection pump is in the "stop" position or press the stop button while the starter motor is in operation. Additionally, if air enters the fuel system, it must be eliminated before the engine can be started, as this is a common cause for starting issues. If the starter motor does not operate, check the switch, connections, and wires for faults.
How do I bleed the fuel system on a Perkins Prima 50?
To eliminate air from the fuel system, first loosen the vent screw (A1) on top of the fuel filter by two or three turns. Operate the priming lever (B) on the fuel lift pump until fuel, free from air, comes from the filter vent point, then tighten the vent screw. Next, loosen the union nuts of the high-pressure pipes at the atomisers (C1) and operate the starter motor until fuel, free of air, comes from the pipe connections, then tighten the high-pressure pipe connections.
What are the replacement specifications for Valve guides?
Valve guides have an inside diameter (reamed in position) of 7,450/7,463 mm (0.2933/0.2938 in) and an outside diameter of 12,04/12,06 mm (0.474/0.475 in). The interference fit of the valve guide in the cylinder head is 0,04/0.08 mm (0.0016/0.0031 in), and the protrusion above the location face for the valve spring is 10 mm (0.39 in). If the clearance with a new valve fitted is more than 0,13 mm (0.005 in), a new valve guide must be fitted.
How quickly can I access this manual?
A 130-page Workshop Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone — no shipping wait.
Can I print specific sections of this Perkins Prima, Prima Marine, 500 Series?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Are there wiring harness diagrams in this Perkins Prima, Prima Marine, 500?
Yes — full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
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