Perkins 4006-23TAG2A Engine

1. Remove the guard assembly from the alternator.
2. Loosen the pivot bolt (B1) and loosen the link adjuster bolts (B3).
3. Adjust the alternator belt to the required tension.
4. Tighten the bolts (B1) and (B2) securely.
5. Fit the guard and tighten all the bolts securely.
6. Connect the power supply to the starter motor.

⚠ Disconnect the batteries and any other power that can start the engine.

⚠ The bridge piece must be adjusted before the valve adjustment is made.

⚠ Check that there is a clearance between the bridge piece and the inlet and exhaust rockers.

Tools: Engine cranking device SE253, Feeler gauge

1. Remove the setscrews (A1); remove the rocker cover (A2) and discard the cover joint (A3).
2. Rotate the engine to the required position, given in table 2.
3. Check that there is clearance on both valves.
4. Loosen the lock nuts on each of the bridge pieces (C2).
5. Turn the adjuster (C3) out until the fixed side of the bridge piece rests on its valve.
6. Hold the top edge of the bridge piece (C1) and turn the adjuster screw (C3) down until it contacts the valve.
7. Tighten the lock nut (C2) to 50 Nm (35 lbf ft) 5,1 kgf m without moving the adjuster screw.
8. To set valve clearance, loosen the lock nut (D1), put the feeler gauge (D2) between rocker and bridge piece, turn adjuster (D3) to make a slide fit.
9. Tighten the lock nut (D1) to 50 Nm (35 lbf ft) 5 kgf m without moving the adjuster screw (D3).
10. Check that the valve clearance is correct; fit a new rocker cover joint (E3) and the rocker cover (E2).
11. Fit the setscrews (E1) and torque to 4 Nm (2.9 lbf ft) 0,4 kgf m.

1. Remove the fan guards.
2. Loosen the 6 nuts (B3) and loosen the lock nut (B2).
3. Rotate the adjusting screw (B1) clockwise to increase tension, anti-clockwise to loosen tension.
4. When all belts are at the correct tension, tighten the 6 nuts (B3) to 85 Nm (62.7 lbf ft) 8,6 kgf m and tighten the locking nut (B2).
5. Check that the fan belt tension is correct on each belt.
6. Fit the fan guards.
7. Connect the power supply to the starter motor.

⚠ Discard the used element in a safe place and in accordance with local regulations.

⚠ Do not operate the engine if there is a blockage in the air filter or the induction hose.

⚠ The air filter element is a non-serviceable item, do not clean the element.

1. Remove the wing nut and the end cover (B3) together.
2. Remove the element (B2) and discard.
3. Fit the new element into the filter housing (B1).
4. Fit the end cover onto the filter housing (B1) and tighten the wing nut securely; check that the end cover is correctly aligned.

⚠ Discard the used canister and fuel oil in a safe place and in accordance with local regulations.

Tools: Strap wrench

1. Thoroughly clean the filter head (A1) and the canister (A3).
2. Put a suitable container under the fuel filter assembly.
3. Use a suitable strap wrench (A2) to remove the canister; discard the canister.
4. Lubricate the top of the new canister seal with clean fuel oil.
5. Fit the new fuel filter canister and tighten it by hand only.
6. Prime the fuel system.
7. Remove the container.
8. Run the engine and check for leaks.

1. Observe the middle section of the restriction indicator (A1); it remains clear while the air cleaner is serviceable.
2. When the filter reaches its contamination limit, the middle section (A3) changes to red; at this point the air filter must be changed.
3. After the air filters have been changed, reset the indicators by operating the button (A2).

⚠ Disconnect the batteries and any other power that can start the engine.

1. Remove the three bolts (A5) from the plate (A6) and remove the plate.
2. Remove the bolt (A3).
3. Remove the top bolt (A1) and the bottom bolt (A4) and remove the two parts of the guard (A2).
4. Apply 15,6 N (3.5 lbf) 1,5 kgf of pressure midway between the two pulleys (B2); correct deflection is 1,5 mm (0.0625 in).
5. Adjust the belt if necessary.
6. Fit the guard assembly and tighten all the bolts securely.
7. Connect the power supply to the starter motor.

⚠ Disconnect the batteries and any other power that can start the engine.

⚠ Use a maximum force of 49 N (11.02 lbf) 5 kgf on a new fan belt for the first twenty four hours.

⚠ Do not fit one fan belt, always fit the fan belts in a set.

1. Apply a force of 31 to 49 N (6.97 - 11.02 lbf) 3,16 - 5 kgf to each of the fan belts separately (A1), to the longest free length between crankshaft pulley and fan pulley.
2. Check the deflection of the fan belt (A2), which should be 4,2 mm (0.165 in).

⚠ Disconnect the batteries and any other power that can start the engine.

1. Remove the wing nut (A1) and remove the breather cover (A3); check the seal around the cover, renew if necessary.
2. Remove the filter elements (A2) from the breather body (A5).
3. Wash the elements in a suitable fluid; dry the elements and inspect them, renew if necessary.
4. Fit the filter elements (A2) into the breather body (A5).
5. Fit the cover (A3) and check that the cover is fitted onto the dowel (A4) correctly.
6. Tighten the wing nut (A1) securely.
7. Connect the power supply to the starter motor.

⚠ Do not drain the coolant while the engine is still hot and the system is under pressure.

⚠ Discard the used coolant in a safe place and in accordance with local regulations.

⚠ To prevent frost damage, ensure that all of the coolant is removed from the engine.

1. Put a suitable container below the drain plugs.
2. Remove the filler cap (B1) from the coolant system.
3. Open the tap or remove the drain plug at the bottom of the radiator to drain the radiator.
4. Remove the drain plug (A1) from the side of the cylinder block to drain the engine; ensure the drain hole is not restricted.
5. Open the drain tap on the oil cooler (C1).
6. Flush the coolant system with clean water.
7. Fit the drain plug (A1) and tighten to 68 Nm (50,5 lbf ft) 6.9 kgf m.
8. Close the drain tap (C1).
9. Fit the radiator cap and fit the radiator plug or close the radiator tap if fitted.

⚠ Discard the fuel oil in a safe place and in accordance with local regulations.

1. Stop the engine.
2. Put a suitable container under the sediment bowl to retain the fluid.
3. Loosen the drain plug (A1) and allow the fluid to drain.
4. When clean fuel can be seen, tighten the drain plug (A1) by hand.
5. Remove the container.

⚠ Do not remove the filler cap while the engine is still hot and under pressure.

⚠ A solution of either water and anti-freeze or water and corrosion preventative must be used; plain drinking water is not recommended.

1. Check that all the coolant system drain plugs are fitted correctly.
2. Rotate the radiator cap (A1) anti-clockwise and remove it.
3. Fill the system with the correct coolant.
4. Fit the radiator cap (A1) and run the engine off load until the thermostat opens.
5. Allow the engine to cool; remove the radiator cap (A1) and top up to 25 mm (1") below the top of the filter neck.
6. Fit the radiator cap.