Perkins珀金斯2806C-E18发动机维修检测技术

Perkins 2800 Series

Mode ls 2806C-E16   and  2806C-E18

DIAGNOSTIC MANUAL

6 cylinder turbocharged diesel engine

Publica tion TS D 3453E, Is sue   3.

© Proprie tary informa tion of P erkins Engine  s Compa  ny Limited, a ll rights reserved.

The  informa tion is corre ct a t the  time of print.

Publishe d in J une  2004 by Te  chnica l Publica tions ,

Perkins Engine  s Compa  ny Limited, Tixa  ll Road, S tafford, S T16 3UB, Engla  nd

Diagnos tic Manua l, TSD 3453E, Is  sue  3

i

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To remove

Warning! The electrical circuit for the fuel injector units operates on 110 volts. Do NOT work on the fuel injector

units unless the power supply to the ECM has been disconnected.

1  Disconnect the wiring harness at the socket on the rocker cover (A1).

2  Disconnect and remove the engine breather pipe (A2).

3  Loosen fully the bolts which retain the rocker cover, but do not remove the bolts from the assembly; allow

them to be retained by the seal.

4  Remove the rocker cover.

To fit

1  Inspect the seal of the rocker cover and renew if worn of damaged.

2  Fit the rocker cover, complete with seal and bolts. Tighten the bolts to a torque of 20 Nm (15 lbf ft); use the

sequence shown (B).

3  Fit the engine breather pipe (A2).

4  Connect the wiring harness. Ensure that the wiring harness is fully engaged with the connector.

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Rocker lever and rocker shaft assemblies

To remove and to fit

Operation 3-2

To remove

1  Remove the rocker cover, Operation 3-1.

2  The valve rocker levers (A1) and the unit injector rocker levers (A2) can move on the shaft (A6) after the four

bolts (A5) have been removed. The shaft (A6) should be kept level when removed from the cylinder head. To

avoid possible personal injury, keep fingers clear of the rocker levers (A1 and A2) during removal of the

assembly from the cylinder head.

3  Remove the four bolts (A5).

4  Remove the shaft (A6), valve rocker levers (A1) and unit injector rocker levers (A2) as a unit.

5  Repeat steps 1 and 2 for the rocker shaft assemblies which remain.

To fit

1  Loosen the adjustment screws (A3 and A4) of each of the rocker levers which have been removed. Install

the rocker shaft assembly in the reverse order to removal.

2  Set the tappet clearances, Operation 3-4.

3  Check/adjust the unit injectors, Operation 3-13.

4  Fit the rocker cover, Operation 3-1.

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To dismantle and to assemble

Operation 3-3

To dismantle

Note: Check the condition of all components and renew any which are worn or damaged.

1  Slide the valve rocker levers (A3) and the unit injector rocker levers (A4) from the shaft (A7).

Note: Fit a new ‘O’ ring seal to any rocker lever adjuster if its button (A1) has been removed from the

adjustment screw (A2).

2  Remove the button (A1) from the adjustment screw (A2) in the valve rocker lever (A3).

3  Remove the button (A6) from the adjustment screw (A5) in the unit injector rocker lever (A4).

4  Repeat steps 1 to 3 for the rocker lever assemblies which remain.

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To assemble

1  Install new ‘O’ ring seals in the buttons (A1).

2  Install new ‘O’ ring seals in the buttons (A6).

3  To fit the ‘O’ ring seals and buttons to the valve rocker levers, proceed as follows:

a. Support the valve rocker lever (A3) in a vice which has soft jaws.

b. Put the ‘O’ ring seal and button (A1) on the round end of the adjustment screw (A2).

c. Use a soft hammer to seat the button on the adjustment screw.

4  To fit the ‘O’ ring seals and buttons to the unit injector rocker levers, proceed as follows:

a. Support the unit injector rocker lever (A4) in a vice which has soft jaws.

b. Put the ‘O’ ring seal and button (A6) over the end of adjustment screw (A5).

c. Use a soft hammer to seat the button on the adjustment screw.

5  Repeat steps 3 and 4 for the rocker levers which remain.

6  Fit the assembled rocker levers to the shafts (A7). Ensure that they are fitted to their original positions.

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How to check/adjust the tappet clearances

Operation 3-4

Special requirements

Special tools

Tappet clearances

Description

Part number

Inlet

Exhaust

Engine turning tool

CH11148

0,38 mm (0.015 in)

0,76 mm (0.030 in)

The tappet clearance is measured between the rocker levers and the top of the valve bridge pieces. The

operation must be done with the engine cold and stopped. Refer also to Operation 3-13, How to check/adjust

the electronic unit injectors.

1  Remove the rocker cover, Operation 3-1.

2  Remove the cover (A2) from the flywheel housing. The top bolt (A1) is the timing bolt.

Caution: If a customer-fitted speed sensor is fitted to the flywheel housing, it must be removed before the

engine turning tool can be inserted.

3  Remove the plug (A3) from the timing bolt location in the flywheel housing and fit the timing bolt.

Note: There are two locations for the timing bolt, one at each side of the flywheel housing. Use the location

that is the most convenient.

4  Insert the engine turning tool, CH11148, into the flywheel housing through the aperture behind the cover

1

(A2). Use a   /  inch drive ratchet with the turning tool to rotate the engine flywheel in the normal direction of

2

rotation (anti-clockwise when viewed on the flywheel) until the timing bolt engages with the threaded hole in

the flywheel. The piston of number 1 cylinder is now at TDC (top dead centre).

Caution: If the flywheel is turned past the threaded hole, the flywheel must be turned in the opposite direction

for approximately 45 degrees and then back in the normal direction of rotation until the timing bolt engages

with the threaded hole. This is to eliminate backlash.

Continued

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5  Check the inlet and exhaust valves of the number 1 cylinder. If they are fully closed the piston is on its

compression stroke and the rocker levers can be moved by hand. If the rocker levers can not be moved

because the valves are slightly open, the piston is on its exhaust stroke. If it is on its exhaust stroke, withdraw

the timing bolt and turn the flywheel a further 360 degrees in the normal direction of rotation so that the number

1 cylinder is set to TDC on its compression stroke, then insert again the timing bolt.

6  Before each set of tappet clearances is adjusted, ensure that the roller of the rocker lever is fully against the

camshaft lobe.

7  Use a set of feeler gauges, inserted at the position shown (B3) between the valve bridge piece and the rocker

lever button, to check the tappet clearances for the inlet valves (C1) on cylinders 1, 2 and 4. Adjust the

clearances if necessary. Check the tappet clearance for the exhaust valves (C2) on cylinders 1, 3 and 5, and

adjust the clearances if necessary.

Continued

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Notes:

l   Move each valve bridge piece before the feeler gauge is inserted to reduce the effect of the oil film.

l   During the procedure, ensure that the feeler gauge is fully inserted

8  After each unit has been adjusted, tighten the lock nut (B2) of the adjustment screw (B1) to a torque of 30 +/

- 4 Nm (22 +/- 3 lbf ft).

9  Withdraw the timing bolt and rotate the flywheel by 360 degrees so that the number 6 piston is at TDC on

its compression stroke. Insert again the timing bolt into the threaded hole.

10  Check the tappet clearances for the inlet valves (C1) on cylinders 3, 5 and 6. Adjust the clearances if

necessary. Check the tappet clearances for the exhaust valves (C2) on cylinders 2, 4 and 6, and adjust the

clearances if necessary.

11  After each unit has been adjusted, tighten the lock nut of the adjustment screw to a torque of 30 +/- 4 Nm

(22 +/- 3 lbf ft).

12  Check again the tappet clearances for all six cylinders.

13  Fit the rocker cover. Remove the engine turning tool and the timing bolt and fit the cover to the flywheel

housing. Fit the plug to the timing bolt location.

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Cylinder head assembly

To remove and to fit

Operation 3-5

Special requirements

Special tools

Description

Consumable products

Part number

GE50019

GE50020

VP12712

Description

Part number

Guide bolt, camshaft gear

Socket, cylinder head bolt

Lifting bracket

Special lubricant

CV60895

Retaining compound

21820 638

To remove

1  Remove the thermostat housing, Operation 12-10.

2  Remove the exhaust manifold, Operation 9-1.

3  Remove the rocker lever and rocker shaft assemblies, Operation 3-2.

4  Remove the electronic unit injectors, Operation 3-12.

5  Remove the gear case cover, Operation 6-1.

6  Disconnect the cable and remove the timing sensor from the cylinder head.

7  Remove the support bracket which is fitted between the gear case and the cylinder head.

8  Remove one bolt from the camshaft gear and install the guide stud, GE50019. Remove the five bolts which

remain and withdraw carefully the camshaft gear. Remove the guide stud.

9  Disconnect the fuel lines from the front and rear of the cylinder head. Fit temporary covers to the fuel lines

and also to the ports on the cylinder head.

10  Remove the cylinder head bolts; use the special socket, GE50020.

11  Fit the lifting bracket (A1), VP12712, to the cylinder head and attach a suitable hoist. Remove the cylinder

head. The cylinder head weighs approximately 148 kg (325 lb).

Continued

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12  Remove the cylinder head gasket (B4).

13  Remove the ‘O’ ring seal from the oil transfer tube (B6) and remove the 24 coolant seals (B3).

14  Remove the seal (B2).

15  Remove the spacer plate (B5) and discard the spacer plate gasket.

16  Remove the second ‘O’ ring seal from the oil transfer tube (B6).

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To fit

1  If the oil transfer tube (B6) has been removed, apply retaining compound, 21820 638, and insert it in the

crankcase. It must protrude from the top face of the crankcase by 20,0 +/- 0,5 mm , (0.79 +/- 0.02 in). Remove

any excess compound and ensure that the bore of the oil transfer tube is clean.

2  If the rear dowel has been removed, apply retaining compound, 21820 638, and insert it in the crankcase.

It must protrude from the top face of the crankcase by 18,5 +/- 0,5 mm (0.73 +/- 0.02 in).

3  If the front dowel, close to the oil transfer tube, has been removed, it must be fitted in a dry condition. It must

protrude from the top face of the crankcase by 16,0 +/- 0,5 mm (0.63 +/- 0.02 in).

Note: Ensure that the spacer plate and the machined surface of the cylinder block are clean and free from dirt

and gasket material. Both surfaces of the spacer plate gasket and the top of the cylinder block must be clean.

Do NOT use a gasket adhesive on the surfaces.

4  Fit suitable guide studs (B1) to the cylinder block. Fit a new spacer plate gasket over the dowels in the

cylinder block.

Note: Apply a small amount of clean engine oil to the seals and ‘O’ ring seals before installation.

5  Fit a new ‘O’ ring seal to the oil transfer tube (B6).

6  Fit the spacer plate (B5) and fit the second ‘O’ ring seal to the oil transfer tube (B6). Fit the 24 coolant seals

(B3) and a new seal (B2) to the oil drain passage.

7  Check, and if necessary adjust, the protrusion of the cylinder liners, Operation 7-3.

8  Fit a new cylinder head gasket (B4) to the spacer plate.

Continued

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9  Fasten a hoist to the cylinder head, use the lifting bracket VP12712, and lower the cylinder head onto the

spacer plate.

10  Apply special lubricant, CV60895, to the washers, the threads and under the heads of the bolts and fit the

cylinder head bolts and washers. The long bolts must be fitted at the positions shown in the black circles (C).

Use the special socket, GE50020, and the procedure which follows to tighten the bolts correctly:

a. Tighten the cylinder head bolts in the sequence given (C) to a torque of 270 +/- 15 Nm (200 +/- 11 lbf ft).

b. Tighten the cylinder head bolts in the sequence given (C) to a torque of 450 +/- 20 Nm (333 +/- 15 lbf ft).

c. Again, tighten the cylinder head bolts in the sequence given (C) to a torque of 450 +/- 20 Nm (333 +/-

15 lbf ft).

Caution: After the cylinder head assembly has been removed and fitted, it is necessary to check the backlash

between the camshaft and the idler gears. Incorrect adjustment can cause damage to components.

11  Fit the camshaft gear. Check and, if necessary, adjust the backlash between the camshaft gear and the

idler gear, Operation 3-11.

12  Fit the gear case cover, Operation 6-1.

13  Fit the support bracket between the cylinder head and the gear case.

14  Fit the electronic unit injectors, Operation 3-12.

15  Fit the rocker lever and shaft assemblies, Operation 3-2.

16  Fit the exhaust manifold, Operation 9-1.

17  Fit the thermostat housing, Operation 12-10.

18  Remove the covers from the fuel lines and from the fuel line ports on the cylinder head. Connect the fuel

lines to the cylinder head and attach any relevant clamps.

19  Fit the timing sensor and connect the cable.

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Valve springs

To remove and to fit

Operation 3-6

Special requirements

Special tools

Description

Part number

Valve spring compressor

GE50026

To remove

Note: The valve springs can be removed with the cylinder head either fitted to or removed from the engine.

The procedure given here is for use when the cylinder head is fitted to the engine. Before any components are

removed, ensure that the relevant piston is set to the top of its compression stroke. If the piston is not at this

position, the valves can fall into the cylinder liner.

Caution: If a valve falls into the cylinder liner, the cylinder head must be removed.

1  Remove the rocker lever and rocker shaft assemblies, Operation 3-2.

2  Remove the electronic unit injectors, Operation 3-12.

3  Set the piston for the relevant valve spring assembly to the top of its compression stroke.

4  Use the hold-down clamp from the electronic unit injector to secure the valve spring compressor, GE50026,

to the cylinder head.

5  Insert the stud and base of the valve spring compressor into the bore of the injector sleeve. Use the bolt and

clamp from the electronic unit injector to secure the stud and base to the cylinder head. Fit the compressor

plate (A1) over the stud and fit the thrust bearing, the washer and the nut (A2)

6  Tighten the nut until the collets are loose on the valves.

7  Remove two collets from each valve.

8  Loosen slowly, then remove the nut, washer, thrust bearing and plate.

9  Remove the rotocoils, valve springs and washers from each valve.

10  Inspect the valve springs, refer to Chapter 2, Specifications for the correct dimensions and spring force.

11  Repeat steps 3 to 10 for the other valve spring assemblies which are to be removed.

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To fit

1  Apply clean engine oil to the relevant valve stems.

2  Fit the washer, valve spring and rotocoil to each valve.

3  Use the valve spring compressor, GE50026, to compress the valve springs.

Note: The collets are tapered. When fitted, the large (thick) diameter must be uppermost.

4  Fit two collets to each valve.

Caution: The collets can be dislodged from the valve stem during the removal of the valve spring compressor.

Ensure that the collets are seated correctly during this procedure.

5  Loosen slowly and then remove the nut (A2) and plate (A1) of the valve spring compressor. Remove the

other parts of the valve spring compressor tool and ensure that the collets are fitted correctly to the valve

stems.

6  Tap lightly each valve with a soft hammer to ensure that the collets are seated correctly.

7  Fit the electronic unit injectors, Operation 3-12.

8  Fit the rocker lever and rocker shaft assemblies, Operation 3-2.

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Valves

To remove and to fit

Operation 3-7

Special requirements

Special tools

Description

Part number

Valve spring compressor

GE50026

To remove

1  Remove the cylinder head, Operation 3-5.

Note: If more than one valve is to be removed, make a note of the position of the valves as they are removed

from the cylinder head.

2  Put the cylinder head, flame face down, on a bench with a soft surface and release the valves by use of the

valve spring compressor, GE50026. Use the procedure given in Operation 3-6.

3  Withdraw the valves from the cylinder head.

4  Repeat the procedure for all valves which are to be removed.

To fit

1  Apply clean engine oil to the stems of the valves. Fit the valves to their original positions in the cylinder head.

2  Use the special tool, GE50026, and the procedure given in Operation 3-6, to install the valve springs.

3  Fit the cylinder head, Operation 3-5.