Chapters
1General information
2Specifications
3Cylinder head assembly
4Piston and connecting rod assemblies
5Crankshaft assembly
6Timing case and drive assembly
7Cylinder block assembly
8Engine timing
9Aspiration system
10 Lubrication system
11 Fuel system
12 Cooling system
13 Flywheel and housing
14 Electrical equipment
15 Auxiliary equipment
16 Special tools
The following pages contain a detailed table of contents
This Workshop Manual has been written to provide assistance in the service and overhaul of
Perkins 4006-23, TAG1A, TAG2A and TAG3A engines. It should be used in conjunction with normal workshop
practise and information contained in current service bulletins. Mention of certain accepted practices therefore,
has been purposely omitted in order to avoid repetition. For overhaul procedures the assumption is made that
the engine is removed from the application.
The engine conf orms with USA (EPA/CARB) stage 2 and EEC stage 2 emissions legislation for agriculture,
construction and industrial applications.
Most of the general information which is included in the relevant User's Handbook has not been repeated in
this workshop manual and the two publications should be used together.
Where the information applies only to certain engine types, this is indicated in the text.
When reference is made to the "left" or "right" side of the engine, this is as seen from the flywheel end of the
engine.
When not working on the engine, ensure that all covers, blank flanges, doors, etc., are refitted to openings to
prevent the ingress of dirt, etc.
Please quote the engine type and serial number with all your enquiries. This will help us to help you. The type
and serial number are on a plate fitted to the crankcase.
If any doubt exists regarding the installation, use or application of the engine, the Installation Manual should
be consulted for further advice contact Applications Department at Perkins Engines (Stafford) Ltd.
Oil change intervals may be changed according to operating experience by agreement with Perkins Engines
(Stafford) Limited and subject to oil analysis being carried out at regular intervals.
Special tools have been made available and a list of these is given in Chapter 16, Special tools. Reference to
the relevant special tools is also made at the beginning of each operation.
POWERPART recommend ed consumab le products are listed under "P OW E RPART recomm ended
consumable products" on page 7. Reference to the relevant consumable products is also made at the
beginning of each operation.
Data and dimensions are included in Chapter 2, Specifications.
Read and remember the "General safety precautions" on page 4. They are given for your protection and must
be used at all times.
Danger is indicated in the text by two methods:
Warning! This indicates that there is a possible danger to the person.
Caution: This indicates that there is a possible danger to the engine.
Note: Is used where the information is important, but there is not a danger.
Workshop Manual, TPD 1511E, issue 11
1
Engine views
4000 Series
JC
A
D1001
D1367
2Workshop Manual, TPD 1511E, issue 1
4000 Series
Engine identification
The 4006-23 engine consists of a range of six cylinder engines. This range has three basic engine types,
TAG1A, TAG2A and TAG3A.
The different engines are identified by their engine number and their type as shown below:
A typical example of an engine number: DGB 060081 U0017 B
Engine number identification
DMade in Stafford
GApplication code
BEngine type
06Number of cylinders
0081Fixed build number
UUnited Kingdom
0017Number of engines bui lt
BYear that the engine was built
Engine type
A4006-23TAG1A
B4006-23TAG2A
D4006-23TAG3A
1
The position of the plate for the engine number (A1).
1
A
D1104
Workshop Manual, TPD 1511E, issue 13
1
4000 Series
General safety precautions
These safety precautions are important. You must refer also to the local regulations in the country of use.
Some items only refer to specific applications.
Only use these engines in the type of application for which they have been designed.
Do not change the specification of the engine.
Do not smoke when you put fuel in the tank.
Clean away fuel which has been spilt. Material which has been contaminated by fuel must be moved to a
safe place.
Do not put fuel in the tank while the engine runs (unless it is absolutely necessary).
Do not allow sparks or fire near the batteries (especially when the batteries are on charge) because the
gases from the electrolyte are highly flammable. The battery fluid is dangerous to the skin and especially
to the e yes.
Do not smoke when you are in the working area of the engine.
Isolate the engine and disconnect the battery before a repair is made to the electrical system.
Do not clean, add lubricating oil, or adjust the engine while it runs (unless you have had the correct training,
even then extreme care must be used to prevent injury).
Do not make adjustments that you do not understand.
Ensure that the engine does not run in a location where it can cause a concentration of toxic emissions.
Ensure that the exhaust system from the engine is supported.
Other persons must be kept at a safe distance while the engine or auxiliary equipment is in operation.
Do not permit loose clothing or long hair near moving parts.
Keep away from moving parts during engine operation.
Warning! Some moving parts cannot be seen clearly while the engine runs.
Do not operate the engine if a safety guard has been removed.
Do not remove the filler cap or any component of the cooling system while the engine is hot and while the
coolant is under pressure, because dangerous hot coolant can be discharged.
Only one person must control the engine.
Ensure that the engine is operated only from the control panel or from the operator’s position.
If your skin comes into contact with high-pressure fuel, obtain medical assistance immediately.
Diesel fuel and lubricating oil (especially used lubricating oil) can damage the skin of certain persons.
Protect your hands with gloves or a special solution to protect the skin.
Ensure that all personal protection equipment for your head, ears, eyes and feet etc, are used when you
are in the working area of the engine.
Do not wear clothing which is contaminated by lubricating oil. Do not put material which is contaminated
with oil into the pockets of clothing.
Discard used lubricating oil in accordance with local regulations to prevent contamination.
Ensure that the control lever of the transmission drive is in the "out-of-drive" position before the engine is
started.
Use extreme care if emergency repairs must be made in adverse conditions.
The combustible material of some components of the engine (for example certain seals) can become
extremely dangerous if it is burned. Never allow this burnt material to come into contact with the skin or with
the eyes.
Always use a safety cage to protect the operator when a component is to be pressure tested in a container
of water. Fit safety wires to secure the plugs which seal the hose connections of a component which is to
be pressure tested.
Continued
4Workshop Manual, TPD 1511E, issue 1
4000 Series
C
Do not allow compressed air to contact your skin. If compressed air enters your skin, obtain medical help
immediately.
Turbochargers operate at high speed and at high temperatures. Keep fingers, tools and debris away from
the inlet and outlet ports of the turbocharger and prevent contact with hot surfaces.
Fit only genuine Perkins parts, failure to do so can damage the engine and may effect the warranty.
Do not wash an engine while it runs or while it is hot. If cold cleaning fluids are applied to a hot engine,
certain components on the engine could be damaged.
Always use lift equipment of the approved type and of the correct capacity to lift heavy engine components.
Never work alone when you operate lift equipment.
1
Viton seals
Viton is used by many manufacturers and is a safe material under normal conditions of operation.
Some seals used in engines and in components fitted to these engines are made of Viton.
If Viton is burned, a product of this burnt material is an acid which is extremely dangerous. Never allow this
burnt material to come into contact with the skin or with the eyes.
If it is necessary to come into contact with components which have been burnt, ensure that the precautions
which follow are used:
Ensure that the components have cooled.
Use neoprene gloves and discard the gloves safely after use.
Wash the area with calcium hydroxide solution and then with clean water.
Disposal of components and gloves which are contaminated must be in accordance with local regulations.
If there is contamination of the skin or eyes, wash the affected area with a continuous supply of clean water or
with calcium hydroxide solution for 15 to 60 minutes. Obtain immediate medical attention.
Safety cautions when an engine is cleaned
Care should be taken, when an engine is cleaned with a high pressure cleaning system.
autions:
Do not wash an engine while it runs or while it is hot. If cold cleaning fluids are applied to a hot engine,
certain components on the engine could be damaged.
Leave the engine to cool for at least one hour and disconnect the battery connections before cleaning.
Do not wash any part of the fuel injection pump (FIP), cold start device, electrical shut off solenoid (ESOS)
or electrical connectors.
Ensure that the alternator, starter motor and any other electrical components are shielded and not directly
cleaned by the high pressure cleaning system.
If these cautions are ignored, the engine or certain components could be damaged, fail to operate and also
make the manufacturer’s warranty invalid.
Workshop Manual, TPD 1511E, issue 15
1
4
4000 Series
Engine lift equipment
When lifting engine or generating sets, special lifting equipment is required. It is recommended that a spreader
lifting beam of the correct lifting load capacity is used and that chains, hooks, shackles and eye bolts etc. are
checked that they are well within their safe working loads. The load should be secure, stable and balanced
when lifting.
The lifting chains etc must be firmly secured to the load by means of hooks etc on to the purpose-designed
lifting points, and that included angle is not exceeded (A).
In order to accommodate the chains for lifting it may be necessary to have to remove engine components such
as air filters etc to prevent damage, but this should be avoided where the chains can be clear by nondetrimental means.
Warning! Lifting equipment should be used by trained personnel only. Generating sets mu st be lifted using
the lifting lugs on the engine frame and a spreader lifting beam. The engine lifting brackets and alternator lifting
lugs must not be used.
A
6Workshop Manual, TPD 1511E, issue 1
D114
4000 Series
1
POWERPAR T reco mmen ded consu ma ble pr od uct s
Perkins have made available the products recommended below in order to assist in the correct operation,
service and maintenance of your engine and your machine. The instructions for the use of each product are
given on the outside of each container. These products are available from your Perkins distributor.
POWERPART ELC (Extended Life Coolant).
ELC is pre-mixed and protects the cooling system against frost and corrosion. Part number 21820181.
POWERPART Easy flush
Cleans the cooling system. Part number 21825001.
POWERPART Gasket and flange sealant
To seal flat faces of components where no joint is used. Especially suitable for aluminium components.
Part number 21820518.
POWERPART Gasket remover
An aerosol for the removal of sealants and adhesives. Part number 21820116.
POWERPART Griptite
To improve the grip of worn tools and fasteners. Part number 21820129.
POWERPART Hydraulic threadseal
(1)
To retain and seal pipe connections with fine threads. Especially suitable for hydraulic and pneumatic systems.
Part number 21820121.
POWERPART Industrial grade super glue
Instant adhesive designed for metals, plastics and rubbers. Part number 21820125.
POWERPART Lay-Up 1
A diesel fuel additive for protection against corrosion. Part number 1772204.
POWERPART Lay-Up 2
Protects the inside of the engine and of oth er closed systems. Part number 1762811.
POWERPART Lay-Up 3
Protects outside metal parts. Part number 1734115.
POWERPART Metal repair putty
Designed for external repair of metal and plastic. Part number 21820126.
POWERPART Pipe sealant and sealant primer
To retain and seal pipe connections with coarse threads. Pressure systems can be used immediately.
Part number 21820122.
Continued
Workshop Manual, TPD 1511E, issue 17
1
POWERPART Radiator stop leak
For the repair of radiator leaks. Part number 21820127.
POWERPART Retainer (high strength)
To retain components which have an interference fit. Part number 21820638.
POWERPART Retainer (oil tolerant)
To retain components which have an interference fit, but are in contact with oil. Part number 21820608.
POWERPART Safety cleaner
General cleaner in an aerosol container. Part number 21820128.
POWERPART Silicone adhesive
4000 Series
An RTV silicone adhesive for application where low pressure tests occur before the adhesive sets. Used for
sealing flange where oil resistance is needed and movement of the joint occurs. Part number 21826038.
POWERPART Silicone RTV sealing and jointing compound
Silicone rubber sealant which prevents leakage through gaps. Part number 1861108.
POWERPART Stud and bearing lock
To provide a heavy duty seal to components that have a light interference fit. Part number 21820119 or
21820120.
POWERPART Threadlock and nutlock
To retain small fasteners where easy removal is necessary. Part number 21820117 or 21820118.
POWERPART Universal jointing compound
Universal jointing compound which seals joints. Part number 1861117.
(1) Powerpart (ELC) is not recommended for the 1300 Series.
(2) These product must not be used for the 4006-23 engine.
Thickness of cylinder head (new) .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 140,075 / 139,925 mm
Minimum thickness for a used cylinder head. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 139,773 mm
Flatness of cylinder head: The cylinder head flame face must be flat within a maximum of 0,03 mm (0.001
in) with the rocker box face parallel within 0,076 mm.
Piston and connecting rod
Piston ring gaps measured with the ring fitted in a new liner with a bore size: 160,025 / 160,000 mm
Top piston ring... ... ... ... .. . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0,80 mm, maximum worn 1,05 mm
Intermediate ring (second). ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0,60 mm, maximum worn 0,85 mm
Oil control ring ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0,60 mm, maximum worn 0,85 mm
Width of groove for oil control ring in new piston... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 6,065 / 6,040 mm
Thickness of a new oil con tro l ring. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. . ... ... ... ... ... 5,990 / 5,975 mm
Clearance between piston ring groove and new oil control ring ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
Maximum permissible clearance between piston
ring groove and a used oil control ring... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0, 254 mm
Sump bolts into crankc a seM1054405,5
Sump bolts into gearcase (al um inium)M1040304
Main bearing cap boltsSee Operation 5-6
Main bearing cap side caps crewsM16n/an/an/a
Oil feed block boltsM1027202,7
Connecting rod boltsSee Operation 4-2
Piston cooling jet boltsM1027202,7
Cylinder head bolts (Fac tory Fitted)175 + 120°
Cylinder head bolts (Waisted) - head marked ‘W’M2472053073,4
General
M20 - Grade 8.8 steel bolts to BS3692M2040029040,7
M16 - Grade 8.8 steel bolts to BS3692M1621015021,4
M12 - Grade 8.8 steel bolts to BS3692M1285608,6
M10 - Grade 12.9 steel bolts to BS3692M1070507,1
M10 - Grade 8.8 steel bolts to BS3692M1050355,1
M8 - Grade 8.8 steel bolts to BS3692M825182,5
M6 - Grade 8.8 steel bolts to BS3692M61071,0
M6 - Grade 12.9 steel capscrews to BS4168: Part 1M616121,6
M5 - Grade 12.9 steel capscrew to BS4168: Part 1M513101,3
3/8” UNF40304
5/8” UNF20015020,3
1/2” UNC90689,1
7/16” UNF66506,7
5/16” UNF22162,2
Starte r motorsM1295707,1
Alternator nutM2475557,6
Taper lockbushM820152
Fuel pipes50355,1
Nmlbf ftkgf m
Torque
130 +
120°
17,8 + 120°
Workshop Manual, TPD 1511E, issue 115
2
Main build
4000 Series
DescriptionThread size
Camshaft
Cam follower housing boltsM1050355,1
Cylinder head
Rocker box bolts-graphite jointM1070507,1
Exhaust manifol d to head bolts (Durlock)M1070507,1
Bridge piece adjuster nubsM1035253,5
Fuel injector clamp capscrewsM1295709,6
Rocker shaft capscrew/nutsM1624018024,9
Rocker adjuster nutsM1250355,1
Unit-fuel injector rocker adjuster nutsM1470507,1
Rocke r co v e r - plast ic M10430,4
Water pump and oil pump
Water pump to gearcase boltsM1050355,1
Water header to oil cooler boltsM1050355,1
Crankcase and crankshaft
Flywheel bolts (Fi nal torque)See Chapter 13, Flywheel and housing
T.V. damper bolts (Fi nal torque)See Chapter 13, Flywheel and housing
Front crankshaft pulley assemblyM1634025034,6
Unit-fuel injector control linkage
Capscrews, unit -fuel injector cont rol leverM5860,8
Locknut - contr ol linkageM5860,8
Note: In the event of failure, valve or valve seat recession reaching the recommended limit, or when the engine
is being overhauled, service exchange cylinder heads supplied by your Perkins Dealer/Distributor are
recommended. The specialised equipm ent and liquid nitrogen are not generally available
The cast iron cylinder heads are fastened to the crankcase by flange head bolts and hardened washers. The
cylinder head gasket to crankcase consists of a stainless steel flame ring. The individual inlet and exhaust
ports are designed to assist and improve air flow. The ports for the inlet are on the right hand side of the engine
and the ports for the exhaust are on the left hand side of the engine.
The cylinder head assembly has four overhead valves for each cylinder. Each valve is held in place by a single
coil spring, cap and two collets. The cylinder head has valve seat inserts fitted for both the intake and the
exhaust. The intake valve seats are made from high speed steel casting and the exhaust valve seats are made
from Pleuco PL12 MV400 which both can be renewed. The valves move in cast iron ferrite nitro carburised
valve guides which also can be renewed.
The overhead valves are operated by a rocker shaft assembly in the rocker box. The forged steel rocker levers
are operated by forged push rods with hardened ball and sockets ends. The rockers and valve gear are
lubricated by oil from the drillings in the rocker shaft that receives oil flow from the extruded fuel/oil rail. Tappet
adjustment is achieved by adjustment screws and locknuts at the push rod end of each rocker lever.
In a diesel engine there is little carbon deposit and for this reason the number of hours run is no indication of
when to overhaul a cylinder head assembly. The factors which indicate when an overhaul is necessary are
how easily the engine starts and its general performance.
Workshop Manual, TPD 1511E, issue 117
3
5
4000 Series
Rocker box and valve gear
To remove and fit the rocker box and valve gearOperation 3-1
Special requirements
Consumable products
DescriptionPart number
POWERPART Hydraulic threadseal21820121
To remove
1 Remove the retaining screws (A5) and lift off the rocker cover (A4). Remove the rocker cover joint and
discard.
2 Remove the nut (A11) and the Allen screw (A3) then lift off the rocker assembly (A1), the cup pad (A10), the
bridge pieces (A8) and the push rods.
3 Remove the retaining Allen screw (A2, A7, A9) and remove the rocker box (A6).
4 A light blow with a hide mallet may be needed to free the rocker box from its joint.
A
1
2
11
3
10
9
8
6
7
4
5
D135
Continued
18Workshop Manual, TPD 1511E, issue 1
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