Mercedes-Benz OM906LA, OM926LA Repair Manual

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Mercedes-Benz OM906LA Mercedes-Benz OM926LA

Repair manual

Service & Parts

1044-004

Introduction

General Information.................................................................................................................................

General repair instructions.....................................................................................................................

Torque settings........................................................................................................................................

CCN explanation

CCN (CLAAS Component Number)........................................................................................................

CCN (CLAAS Component Number)

Safety

General Information.................................................................................................................................

01 Engine

0102 Complete component.....................................................................................................................

0105 Engine suspension.........................................................................................................................

0110 Engine housing...............................................................................................................................

0115 Engine unit......................................................................................................................................

0120 Cylinder head / Valves / Idler gear................................................................................................

0125 Injection - / Fuel system.................................................................................................................

0130 Lubricating oil system....................................................................................................................

0135 Cooling system...............................................................................................................................

0140 Exhaust system..............................................................................................................................

0145 Air intake.........................................................................................................................................

0150 Engine attachment parts................................................................................................................

0155 Engine control.................................................................................................................................

0165 Exhaust gas treatment...................................................................................................................

1044-004

117

152

176

196

212

231

234

255

257

Index....................................................................................................................................

284

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Introduction General Information

Introduction

1044-004

General Information

Validity of manual

This manual applies to the Mercedes-Benz diesel engines below:

Engine Type design Engine no.

OM 906 LA 906.991 906.991-00-xxxxxx

OM 926 LA 926.929 926.929-00-xxxxxx

OM 926 LA 926.959 926.959-00-xxxxxx

OM 926 LA 926.970 926.970-xx-xxxxxx

Handling the manual

This repair manual should help you to maintain ongoing operational capacity. The high value of the harvesting machine is ensured through careful maintenance and technical monitoring by customer service.

This repair manual is a compilation of our service technicians' and shop-floor experience.

162113-001

123139-005

The picture sequence demonstrates the steps in a repair procedure. The text provides you with the information required for making adjustments, using special tools and further similar information.

Essential repairs are listed in such a way that even individual and small repairs can be easily found and followed.

Supplements are added to reflect the ongoing technical development of the machines and the manual is thereby continuously being updated as a reference book.

As a precaution, always compare the setting values and fill quantities with the most recent operator's manual and the technical systems documents for the respective machine.

Texts and figures

Pictures and graphics apply to all models covered by this manual. Differences are highlighted by captions below the figures.

In general, texts are short and apply to all models covered by this manual. Differences are highlighted by intermediate headings.

Different text categories can be easily identified by the formatting. The following different formattings are distinguished:

4 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Formatting Meaning Description

Description Descriptive text Further information on the subject.

Introduction

General Information

1044-004

Procedure

–

instructions

Process Operations which must be carried out one after the

other.

Result Result Result of the processes carried out.

References can be easily identified by corresponding symbols. The following symbols are distinguished:

Symbol

Meaning Description

See index

The symbol indicates that further information on this subject is available in other sections of this manual.

See the index of the Operator's Manual in question

The symbol indicates that further information on this subject is available in the Operator's Manual of the machine or of the implement in question.

Document structure based on the assembly structure

The chapters of the present manual are subdivided into assemblies as far as contents permit. The structure of these assemblies is the same in all chapters.

Different product groups have different assembly structures. CLAAS makes every effort to keep this assembly structures identical in any document.

Search and find

Due to the constantly recurring assembly structure, the subject in question can be quickly found using the table of contents or the header of this manual.

In addition, the index provided in this manual is a useful tool for locating a subject. The index can be found on the last pages of this manual.

Directions

Front, rear, right and left refer to the direction of forward travel. If necessary, a direction arrow is used for indicating the direction of travel in figures.

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Introduction General Information

Abbreviations

Abbreviation Description

bar bar (unit for pressure)

approx. approximately

cm Centimetre

DIN German Standardization Institute

EC European Community

EN European Standard

GPS Satellite navigation system

h Hours

Ident no. Identification number of machine

ISO International Standardization Organisation

kg Kilogram

1044-004

kPa Kilopascal

km Kilometre

km/h Kilometres per hour

m Metre

mm Millimetre

Nm Newtonmetre

psi pound per square inch

StVZO German Regulations Authorizing the Use of Vehicles for Road Traffic

e.g. for instance

% percent

°C degrees Celsius (unit for temperature)

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General Information

Technical terms

Technical term Description

recycle Re-use of used, defective or no longer required products

Season Recurring periods of a year

Ignition TDC Ignition top dead centre (diesel engine piston position)

Overlap TDC Valve overlap top dead centre (diesel engine piston position)

BDC Bottom dead centre (diesel engine piston position)

Your CLAAS Service Department

Introduction

1044-004

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Introduction General repair instructions

General repair instructions

Technical specifications

Information on proper repairs

1044-004

123153-002

Technical specifications, dimensions and weights are non-binding. Technical specifications are subject to modification in the course of technical development, and all errors and omissions are excepted.

123192-003

Mark rotating machine components before

►

removing or dismounting them in order to ensure well-balanced component seating on the correct side after refitting.

The slots of expansion pins must always point to

►

the loaded side. When they are installed with a 90° twist, they

come loose, fall out or shear off. Replace cotter pins, locking wires, sheet retention

►

devices, lock washers and spring washers in the repair process.

Align sprockets and V-belt pulleys with one

►

another. Observe the information in the hydraulic system

►

chapter when working on the hydraulic system. Do not mix different oil grades.

►

Self-locking bolts

Liquid locking compound

151599-001

Self-locking bolts must not come in contact with sealing compound.

Tighten self-locking bolt speedily up to the

►

specified torque.

► The full hardening time can be reduced by

heating-up, e.g. to 15 minutes at + 70 °C.

► The full load capacity is achieved after

24 hours at + 20 °C.

When unscrewing self-locking bolts, unscrew

►

them quickly.

Use liquid locking compound (glue) only at the

►

spots described in the Repair Manual. The surfaces to be joined must be absolutely

►

clean and free of grease.

► A suitable cleaner and an activator possibly

delivered along with the glue can be used for cleaning.

No cleaner residues may remain on the surfaces

►

to be joined. This applies in particular to tapped holes with a

bottom.

► Let the surfaces dry well before applying the

glue.

123164-004

120820-003

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Steel roller chains

Introduction

General repair instructions

Apply the glue only in the areas shown in the

►

figure if possible. When applying the glue at an unfavourable spot

or when applying too much glue, the joint may tear off when loosening.

Observe the glue producer's instructions for use

►

and application!

A joint secured by liquid locking compound can be loosened by heating up to approx. 200 °C.

120771-004

Tensioning

Checking the tension of steel roller chains:

Apply a small load to the tight span.

►

Push down the slack span in the middle between

►

the sprockets with your thumb.

You should be able to push down the slack span around 2 % of the spacing between the axles.

1044-004

13827-006

123668-001

Example:

Axle spacing (A) = 500 mm

Pushing distance (x) of slack span = approx. 10 mm

Chain connector

The closed side of chain connector (1) must point

►

in running direction (L)!

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Introduction General repair instructions

Taper ring fasteners

Dismounting

Slacken off tapered ring (1) with a blow.

►

► Use an auxiliary tool (2) if required.

1044-004

120801-005

154769-001

154486-001

Installation

NOTICE! Sticking together at the taper ring fasteners.

The joint cannot be loosened or comes off only with difficulty.

► Do not install parts with tough grease.

Clean shaft (1), hub (2), parallel key (3) and

►

tapered rings (4) thoroughly and apply some CLAAS AGRIGREASE LC 00 / 000.

Tighten to the specified torque.

►

► In case of several taper ring fasteners fitted

behind one another, tighten those

separately.

► Use an auxiliary tool (5) if required.

13975-003

154768-001

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Gib head key joints

General repair instructions

Dismounting

Slacken off gib head key (1) with a blow if

►

possible.

► Use an auxiliary tool (2) if required.

Introduction

1044-004

123163-004

154811-001

154813-001

Drive out the gib head key (2) with a key

►

drawer (1).

► Ensure that the key drawer is used as shown

in the figure.

154812-001

Installation

The gib head key (1) comes in raw condition as a spare part and must be machined to suit the application by milling or grinding.

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Introduction General repair instructions

Lock collar bearing

154492-001

Grind the gib head key (1) to suit the application

►

at surface (2).

► Surface (3) must not be machined.

Clean shaft, hub and keyway to be free of grease,

►

paint and rust prior to assembly.

NOTICE! Excessive force employed when installing the gib head key. Damage to the gib head key joint. The gib head key cannot be removed any more.

► Drive in the gib head key carefully with a suitable

and not too heavy hammer. Ensure that the gib head key is driven in only so

►

far that it can still be removed without problems, using a key extractor.

Dismounting

Slacken off set screw (1).

►

Drive off eccentric ring (2) against the shaft's

►

sense of rotation. Remove bearing.

►

1044-004

85675-003

123167-002

154814-001

Installation

Tighten lock collar bearing (1) on the shaft by

►

twisting eccentric ring (2) over the inner bearing race (3).

► Arrest the eccentric ring with moderate force

in the sense of rotation of the shaft.

► To make dismounting easier, the inner race

and the shaft can be coated with CLAAS AGRIGREASE LC 00 / 000.

Tighten set screw (4).

►

154500-001

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Adapter sleeve bearings

General repair instructions

Dismounting

Loosen the tab of sleeve nut (3).

►

Slacken off sleeve nut by some turns only.

►

► Ensure that the thread is still completely

engaged.

Slacken off expansion pin (2) with a firm blow.

►

Pull off adapter sleeve bearing (1) completely.

►

Introduction

1044-004

120831-003

Chuck bushing

154510-001

Installation

►

Dismounting

► ►

►

Clean expansion pin (2) and shaft and check easy movement of the sleeve nut (3).

Install adapter sleeve bearing (1) according to the conical inside ring (2).

Tighten the sleeve nut with the suitable special tool and to the prescribed torque.

Continue tightening the sleeve nut to the specified degrees.

Tighten sleeve nut until the nearest tab can be applied.

Secure sleeve nut with the tab.

144598-002

Unscrew bolts (1). Screw in bolts (1), or longer bolts if required at (2).

► Screw in bolts until the chuck bushing (3)

comes loose.

► Apply a little oil to bushing if necessary.

Remove the chuck bushing if required.

Version 1 154820-002

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max. 180°

Introduction General repair instructions

1044-004

Version 2 154836-002

Installation

Clean chuck bushing (1) and shaft thoroughly.

►

Insert chuck bushing.

►

► Ensure that slots (3) and (4) are mounted

with the maximum possible angle offset.

Tighten bolts (2) evenly crosswise in three steps.

►

► Observe the specified torques of the

respective steps.

Version 1

185680-001

Version 2 154844-002

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Circlips

Introduction

General repair instructions

1044-004

144716-004

144718-002

NOTICE

Overspreading the circlip.

Plastic material deformation.

No safe fixing of component.

► Spread circlip only as far as needed for

installation and dismounting.

► Do not use any circlip already overspread before.

Insert circlips as shown in the figures.

►

► Ensure that chamfer (1) does not make

contact with the component to be secured.

► If required, make circlip engage with a slight

blow.

Circlip DIN 471 155144-001

Circlip DIN 472 155145-001

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Introduction General repair instructions

Ferrule fittings

Ferrule without seal 154515-001

Ferrule with seal 154516-001

Screwing in

►

► ►

►

1044-004

120840-004

Cut off the corresponding tube at right angles.

► Do not use a pipe cutter.

In case of pipe bends, the straight pipe end up to where the bending radius starts must be at least twice the height of the union nut.

Slightly deburr the pipe end on the inside and outside.

► Do not chamfer the pipe end. Clean the pipe end. Push the union nut (1) and the ferrule (2) on the

pipe. Push the pipe against the stop in the connector

(3) and tighten the union nut until the ferrule seizes the pipe.

This pressure point can be felt because increased power is needed from here.

The pipe must be fixed securely during assembly and must not rotate.

Tighten the union nut by half a rotation beyond the first pressure point.

Check the incision at the cutting edge. A visible collar must fill the space ahead of the

ferrule face end. The ferrule may rotate, but axial displacement

must not be possible. Insert the pre-assembled pipe into the well-oiled

threaded joint. Screw on the union nut until the power needed to

do this clearly increases. After that, continue to screw the union nut on for

half a turn beyond that point.

► Observe the tightening torques. Page

Non-tight ferrule connection

If a connection leaks, loosen the union nut until

►

some oil escapes. Then tighten according to instructions.

►

Replace the seal (4) if required.

►

16 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Sealing cone fittings

XXX / 250 bar / 13/07

XXX / 250 bar

/ 13

/07

XXX / 250 bar / 13/07

Introduction

General repair instructions

Apply seal (1) on the sealing cone (2).

►

Tighten the union nut (3) a third of a turn beyond

►

the point where resistance is felt.

► Observe the tightening torques! Page

1044-004

123189-002

Hydraulic hoses

154527-001

NOTICE

Failure of hydraulic hose lines due to ageing.

Uncontrolled lowering of machine parts.

► Replace hydraulic hose lines 6 years after

manufacture at the latest.

To facilitate identifying of hydraulic hoses, each hose has the CLAAS part number printed on it.

Check hydraulic hoses before initial

►

commissioning and thereafter at least once a year.

In the case of damage and ageing, replace

►

hydraulic hoses.

The date of manufacture can be seen on the hose fittings (1).

120856-007

124582-003

(2) = year (e.g. 12 = 2012)

(3) = month (e.g. 07 = July)

40202-004

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 17

Introduction General repair instructions

5727-002

Hose placement

NOTICE! Hoses laid in a straight line get shorter as

the hydraulic pressure is built up. Valves may be torn off.

► Always install hoses with a slight slack.

Install hoses so that no tension or compression

►

loads will occur in any operating conditions.

► Check: If you shake the hose line in the

middle between two brackets/connectors (e.g. clamps), the overall play of the hose line should be at least 1 cm.

Do not install hose with a twist.

►

► Particularly if there is movement at the hose

line.

1044-004

13989-003

5728-002

5729-002

5726-002

Avoid external mechanical impacts on hoses.

►

► Avoid chafing the hoses against each other

or against components through proper placement and fastening.

► Keep an adequate distance from

components.

► Keep sharp-edged components covered at

all times.

When high outside temperatures are involved,

►

install hose lines at a sufficient distance from components radiating heat.

► If necessary, protect hose by a protective

guard.

18 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Introduction

General repair instructions

1044-004

Treatment of sealing faces

Spare parts

5730-002

157962-002

Close all oil, coolant and fuel bores thoroughly prior to treating the sealing faces.

Ensure that when treating sealing faces of components containing oil, coolant and fuel, no abrasives are used. Loose particles cause pollution and damage.

Ensure that no seal residues, rust, lime and combustion residues end up in open components (gearbox halves).

Remove sealing residues, rust, lime and combustion residues only using scraping tools or cleaning agents.

123155-004

11210-003

WARNING

Use of unauthorised spare parts.

Death or serious injury.

► Spare parts must at least comply with the

technical standards required by the manufacturer of the implement!

► We recommend using genuine CLAAS spare

parts.

Please quote the machine identification number

►

when ordering spare parts or making technical enquiries.

CLAAS will assume no liability whatsoever for damage incurred as a result of the use of non-genuine CLAAS parts, accessories, and ancillary equipment.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 19

Introduction Torque settings

Torque settings

Tightening torques for metric standard threads

The tightening torques specified below apply only when:

A friction coefficient of µ tot = 0.14 is achieved in

–

connection with thread lubricant. To achieve this, a surface protection agent such

as A3C+L, Dacromet or Termosil is recommended.

No other tightening torque is specified in the

–

descriptive text. No additional screw retention is used, such as

–

MK-type bolts or liquid locking compound.

Tightening torque in Nm at a friction coefficient

1044-004

123194-003

Bolts and nuts

Strength class 8.8 10.9 12.9

Dimensions

M 4 2.9 4.3 5

M 5 5.8 8.5 10

M 6 10 14.5 17

M 8 24.5 36 42

M 10 48.5 71 83.5

Hex. bolts

ISO 4014 to ISO 4018

M 12 83.5 123 144

M 14 133 196 229

M 16 207 304 355

Cheese-head screws

M 18 296 422 494

ISO 4762

Hex. nuts

ISO 4032

M 20 417 594 695

M 22 570 813 951

M 24 718 1022 1196

M 27 1058 1506 1763

μ tot = 0.14

M 30 1437 2046 2395

M 33 1944 2770 3240

M 36 2500 3561 4167

M 39 3237 4610 5394

20 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Torque settings

Tightening torques for metric fine thread screws

The tightening torques specified below apply only when:

A friction coefficient of µ tot = 0.14 is achieved in

–

connection with thread lubricant. To achieve this, a surface protection agent such

as A3C+L, Dacromet or Termosil is recommended.

No other tightening torque is specified in the

–

descriptive text. No additional screw retention is used, such as

–

MK-type bolts or liquid locking compound.

Tightening torque in Nm at a friction coefficient

Introduction

1044-004

123196-003

Bolts and nuts

Strength class 8.8 10.9 12.9

Dimensions

M 8 x 1 26 38.5 45

M 10 x 1 54 79 92.5

M 10 x 1.25 51 74.5 88

M 12 x 1.25 90.5 134 156

M 12 x 1.5 87 128 150

M 14 x 1.5 143 210 246

M 16 x 1.5 219 323 378

Hex. bolts

ISO 8765, ISO 8876

M 18 x 1.5 331 470 551

M 18 x 2 313 446 522

M 20 x 1.5 459 655 766

Hex. nuts

ISO 4032

M 22 x 1.5 622 886 1037

M 24 x 1.5 809 1152 1348

M 24 x 2 778 1108 1297

μ tot = 0.14

M 27 x 1.5 1173 1672 1956

M 27 x 2 1135 1617 1892

M 30 x 2 1580 2251 2634

M 33 x 2 2116 3015 3528

M 36 x 2 2773 3951 4623

M 39 x 2 3557 5067 5930

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 21

Introduction Torque settings

1044-004

123198-002

Tightening torques for hydraulic screw fittings and air conditioner screw fittings with sealing cone and O-ring according to DIN 3865

Outside pipe diameter

in mm

6 10 15

8 15 25

10 25 35

12 35 50

15 50 -

16 - 80

18 80 -

20 - 110

22 110 -

25 - 160

28 160 -

30 - 210

35 210 -

Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

38 - 320

42 320 -

22 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Tightening torques for hydraulic screw fittings with ferrule according to DIN 3861

Introduction

Torque settings

1044-004

123197-002

Outside pipe diameter

in mm

6 15 25

8 25 35

10 35 50

12 50 80

15 80 -

16 - 110

18 110 -

20 - 160

22 160 -

25 - 210

28 210 -

30 - 320

35 320 -

Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

38 - 400

42 400 -

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 23

Introduction Torque settings

Tightening torques for SDS hydraulic male connectors

Shape B with sealing edge (cutting edge)

Shape E with soft ring seal

1044-004

123200-004

Dimension Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

M5 - -

M6 - -

M8 x 1 - -

M10 x 1 18 -

M12 x 1.5 30 35

M14 x 1.5 45 55

M16 x 1.5 60 70

M18 x 1.5 70 110

M20 x 1.5 - 140

M22 x 1.5 140 170

M26 x 1.5 180 220

M27 x 2 190 250

M33 x 2 300 300

M42 x 2 500 550

M48 x 2 550 600

G 1/8 A 20 25

G 1/4 A 35 40

G 3/8 A 70 90

G 1/2 A 100 150

G 3/4 A 180 270

G 1 A 250 350

G 1-1/4 A 450 500

G 1-1/2 A 550 600

7/16 - 20 (11.1 mm) - -

1/2 - 20 (UNF) - -

9/16 - 18 (14.3 mm) - -

3/4 - 16 (19.1 mm) - -

7/8 - 14 (22.2 mm) - -

24 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Introduction

Torque settings

1044-004

Dimension Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

1-1/16 - 12 (27 mm) - -

1-5/16 - 12

- -

(33.3 mm)

1-5/8 - 12 (UNF) - -

1-7/8 - 12 (UNF) - -

2 - 12 (UNF) - -

Shape F with O-ring and plug

Dimension Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

M5 2.8 -

M6 5.2 -

M8 x 1 7 -

M10 x 1 11 -

M12 x 1.5 15 15

M14 x 1.5 25 25

M16 x 1.5 35 35

M18 x 1.5 50 50

M20 x 1.5 - 55

M22 x 1.5 80 80

M26 x 1.5 110 110

M27 x 2 110 160

M33 x 2 160 210

M42 x 2 210 320

M48 x 2 320 420

G 1/8 A - -

G 1/4 A - -

G 3/8 A - -

G 1/2 A - -

G 3/4 A - -

G 1 A - -

G 1-1/4 A - -

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 25

Introduction Torque settings

1044-004

Dimension Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

G 1-1/2 A - -

7/16 - 20 (11.1 mm) 15 20

1/2 - 20 (UNF) 20 25

9/16 - 18 (14.3 mm) 30 30

3/4 - 16 (19.1 mm) 35 60

7/8 - 14 (22.2 mm) 70 90

1-1/16 - 12 (27 mm) 85 100

1-5/16 - 12

150 170

(33.3 mm)

1-5/8 - 12 (UNF) 250 300

1-7/8 - 12 (UNF) 300 350

2 - 12 (UNF) 350 400

Shape H with O-ring and chamber ring

Dimensions

Tightening torque

(light series)

in Nm

G 1/8 A 20 20

G 1/4 A 40 40

G 3/8 A 75 75

G 1/2 A 85 85

G 3/4 A 180 180

G 1 A 310 310

G 1-1/4 A 450 450

G 1-1/2 A 540 540

Tightening torque

(heavy series)

in Nm

26 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Tightening torques for hydraulic swivel fittings

Introduction

Torque settings

1044-004

123204-003

Dimensions Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

M10 x 1 20 30

M12 x 1.5 35 40

M14 x 1.5 45 50

M16 x 1.5 60 70

M18 x 1.5 75 80

M20 x 1.5 - 100

M22 x 1.5 125 130

M26 x 1.5 130 -

M27 x 2 130 140

M33 x 2 300 300

M42 x 2 500 500

M48 x 2 600 600

G 1/8 A 20 -

G 1/4 A 40 40

G 3/8 A 65 70

G 1/2 A 90 100

G 3/4 A 130 130

G 1 A 270 380

G 1-1/4 A 500 600

G 1-1/2 A 600 700

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 27

Introduction Torque settings

Tightening torques for hollow screws DIN 7643

Dimensions Tightening torque

M8 x 1 8

M10 x 1 15

M12 x 1.5 27

M14 x 1.5 38

M16 x 1.5 45

M18 x 1.5 58

M22 x 1.5 95

M26 x 1.5 130

M30 x 1.5 183

1044-004

123206-002

in Nm

28 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Tightening torques for direction-adjustable SDE hydraulic male connectors

Shape F with O-ring

Introduction

Torque settings

1044-004

123202-004

Dimensions Tightening torque

(very light series)

in Nm

Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

M8 x 1 - - -

M10 x 1 20 15 -

M12 x 1.5 - 25 35

M14 x 1.5 - 35 45

M16 x 1.5 - 40 55

M18 x 1.5 - 45 90

M20 x 1.5 - - 140

M22 x 1.5 - 60 170

M26 x 1.5 - 100 190

M27 x 2 - 100 190

M33 x 2 - 160 310

M42 x 2 - 210 330

M48 x 2 - 260 420

7/16 - 20 (11.1 mm) - 15 20

1/2 - 20 (UNF) - 30 40

9/16 - 18 (14.3 mm) - 35 45

3/4 - 16 (19.1 mm) - 55 60

7/8 - 14 (22.2 mm) - 80 90

1-1/16 - 12 (27 mm) - 100 100

1-5/16 - 12

- 150 170

(33.3 mm)

1-5/8 - 12 (UNF) - 290 340

1-7/8 - 12 (UNF) - 325 415

2 - 12 (UNF) - 350 450

Shape H with O-ring and chamber ring

Dimensions

Tightening torque

(very light series)

Tightening torque

(light series)

Tightening torque

(heavy series)

in Nm

M8 x 1 10 - -

M10 x 1 20 18 -

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 29

Introduction Torque settings

1044-004

Dimensions Tightening torque

(very light series)

in Nm

Tightening torque

(light series)

in Nm

Tightening torque

(heavy series)

in Nm

M12 x 1.5 - 30 35

M14 x 1.5 - 45 55

M16 x 1.5 - 60 80

M18 x 1.5 - 70 105

M20 x 1.5 - - 140

M22 x 1.5 - 125 125

M26 x 1.5 - 180 180

M27 x 2 - 180 180

M33 x 2 - 300 380

M42 x 2 - 450 500

M48 x 2 - 600 600

G 1/8 A 20 20 25

G 1/4 A - 35 45

G 3/8 A - 70 75

G 1/2 A - 100 100

G 3/4 A - 180 180

G 1 A - 300 300

G 1-1/4 A - 450 450

G 1-1/2 A - 540 540

30 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Tightening torques for brake line screw fittings

Dimensions Tightening torque

M10 x 1 14+2

Tightening torques for worm drive hose clamps

Introduction

Torque settings

1044-004

123207-004

Shape F union screws

Shape FS union screws with chime

in Nm

123209-003

8515-001

Width of clip Tightening torques for new hoses

when installing for the first time

Tightening torques for retightening or reassembling

7.9 mm (0.31 inch) 0.9 ± 0.2 Nm (8 ± 2 lb in) 0.7 ± 0.2 Nm (6 ± 2 lb in)

13.5 mm (0.53 inch) 4.5 ± 0.5 Nm (40 ± 4 lb in) 3.0 ± 0.5 Nm (27 ± 4 lb in)

15.9 mm (0.63 inch) 7.5 ± 0.5 Nm (65 ± 4 lb in) 4.5 ± 0.5 Nm (40 ± 4 lb in)

Tightening torque for spring-loaded worm drive hose clamps

123211-002

37503-001

Width of clip

Clamp diameter Tightening torque

12 mm 60 - 80 mm 5 + 0.5 Nm

12 mm 70 - 90 mm 5 + 0.5 Nm

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 31

CCN explanation CCN (CLAAS Component Number)

CCN explanation

1044-004

CCN (CLAAS Component Number)

General

Electric systems standard

Pos. Component

A Terminal / module

B Sensor

C Electric / electronic devices

E Lighting

G Voltage source

H Signalling device / lamp

120555-004

The CCN (CLAAS Component Number) arises from a CLAAS standard for hydraulic and electric systems. This standard is based on the hydraulic and electric functions on the machine.

146587-001

In the electric systems standard, the components are subdivided according to their function, using letters.

J Information units (required for function diagnosis)

M Motor (electric)

P Gauge

R Potentiometer / resistor

S Switches / pushbuttons - Cab operation

T Switches - Terminal operation

U Switches - External operation

V Electronic component

W Antenna

X Connectors

Y Solenoid coil

Z Actual value switch

32 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Hydraulic system standard

Pos. Component

1000 Oil reservoir / oil filter / oil cooler

2000 Pump / motor

3000 Hydraulic cylinder

4000 Restrictor / orifice plate

5000 Pressure accumulator

6000 Valve - mechanically actuated

7000 Valve - hydraulically actuated

8000 Couplings / connections

CCN explanation

CCN (CLAAS Component Number)

1044-004

146588-001

In the hydraulic systems standard, the components are subdivided according to their function, using number ranges.

9000 Measuring point / gauge

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 33

CCN (CLAAS Component Number) CCN (CLAAS Component Number)

CCN (CLAAS Component Number)

1044-004

34 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

CCN (CLAAS Component Number)

CCN Index

1044-004

CCN Index

A015 see A6-MB.............................................................................................................................................52, 256

A032 see A95-MB.................................................................................................................................................275

A113-MB NOx sensor with control unit................................................................................................................. 229

A6-MB MR/PLD control unit............................................................................................................................52, 256

A95-MB Exhaust gas treatment module............................................................................................................... 275

B10-MB Fuel temperature sensor...........................................................................................................................52

B111-MB Sensor

Charge air temperature and pressure......................................................................................................52, 232

B115-MB Exhaust temperature sensor

Upstream of catalyst...................................................................................................................................... 229

B116-MB Exhaust temperature sensor

Downstream of catalyst..................................................................................................................................229

B11-MB Oil temperature sensor..................................................................................................................... 52, 190

B128-MB Dosing unit air pressure sensor...................................................................................................... 52, 279

B129-MB Urea pressure sensor..................................................................................................................... 52, 279

B12-MB Oil pressure sensor...........................................................................................................................52, 190

B130-MB Urea temperature sensor................................................................................................................ 52, 279

B14-MB Oil level sensor................................................................................................................................... 52, 63

B15-MB Crankshaft position sensor................................................................................................................. 52, 77

B16-MB Camshaft position sensor......................................................................................................................... 52

B350 see A113-MB...............................................................................................................................................229

B351 see B115-MB...............................................................................................................................................229

B352 see B116-MB...............................................................................................................................................229

B360 see B129-MB.........................................................................................................................................52, 279

B65-MB Coolant temperature sensor............................................................................................................. 52, 201

G002 see G2-MB.......................................................................................................................................... 241, 246

G003 Alternator 24 V............................................................................................................................................ 246

G2-MB alternator 12 V.................................................................................................................................. 241, 246

M021 see M1-MB..................................................................................................................................................236

M047 see M25-MB........................................................................................................................................260, 267

M1-MB Electric starting motor...............................................................................................................................236

M25-MB Urea pump......................................................................................................................................260, 267

R25-MB Urea diffusor heater................................................................................................................................ 279

Y107-MB Urea heater valve..........................................................................................................................260, 264

Y109-MB Urea dosing valve........................................................................................................................... 52, 279

Y10-MB Plug-on pump valve................................................................................................................................ 168

Y11-MB Plug-on pump valve................................................................................................................................ 168

Y487 see Y109-MB.........................................................................................................................................52, 279

Y488 see Y107-MB.......................................................................................................................................260, 264

Y6-MB Plug-on pump valve.................................................................................................................................. 168

Y7-MB Plug-on pump valve.................................................................................................................................. 168

Y8-MB Plug-on pump valve.................................................................................................................................. 168

Y9-MB Plug-on pump valve.................................................................................................................................. 168

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 35

Safety General Information

Safety

1044-004

General Information

Of special importance

Identification of warning and danger signs

123229-002

In order to prevent accidents, the information provided in this repair manual must be read and observed by all persons who use, maintain, repair, service or monitor the machine.

Read the section on safety in particular.

123231-004

We have marked all points of this Repair Manual involving your safety and the safety of the front attachment or of the machine with the signs below. Please pass all safety precautions on to other users as well.

9-003

WARNING

Nature and source of danger

Consequences: probable incidence of serious injury or death

► Countermeasures

CAUTION

Nature and source of danger

Consequences: probable incidence of slight injuries

► Countermeasures

NOTICE

Nature and source of danger

Consequences: probable incidence of material damage

► Countermeasures

11-003

13-003

36 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Safety

General Information

1044-004

16-003

Information

Nature and source of information

Consequences: inefficient use

► Measures

18-001

Environment!

Nature and source of danger

Consequences: damage to the environment

► Countermeasures

The warning and information signs on the machine provide important information for hazard-free operation. Observing these warnings and information serves your safety!

Regulations for avoiding accidents with personal injuries

General

In addition to this manual, the Repair Manual for

–

the machine must always be observed. Observe all general rules concerning safety and

–

accident prevention. Testing, adjusting and repair work may be carried

–

out only by CLAAS sales partners.

Testing, adjusting and repair work

WARNING

Pinch point from pre-loaded components.

Serious injuries.

► Never move your hands between pre-loaded

components.

Secure the engine when removing it.

–

Keep the engine, ladders, stairs, bridges and their

–

surroundings free of oil and grease. Switch off the battery isolating switch while

–

working in built-in condition. Ensure that the engine is not started accidentally

–

by unauthorised persons.

157730-003

1497-002

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 37

Safety General Information

1044-004

Engine operation

160525-002

CAUTION

Bruises and burns when intervening into the starting process or while the engine is running.

Danger of injury

► Wear closed and tight-fitting working clothes.

► Do not touch any hot or rotating parts.

173-002

CAUTION

Contact with hot liquids or machine parts.

Danger of burns

► Wear suitable protective clothing.

► Let liquids or machine parts cool down.

► Comply with instructions.

Suspended loads

57765-002

WARNING

Lifting heavy components.

Risk of death or serious injury.

► Use a lifting tool with a sufficient bearing load.

► Use a lifting tool that operates reliably.

► Use the lifting tool on solid and even ground.

► Attach the lifting tool to the component at the

intended or a suitable position.

► Only use faultless and sufficiently dimensioned

lifting accessories.

► Protect lifting accessories against sharp corners

and edges, for example using protectors.

Do not lift heavy components with your body's

►

force. Ensure that no persons are present beneath

►

suspended loads.

38 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

General Information

Working on piping and hoses

WARNING

Fire / explosion hazard when handling fuel.

Death or serious injury.

► No fires, sparks, open light and no smoking.

► Fill fuel only into suitable containers.

► Wear protective clothing.

CAUTION

Contact with hot liquids.

Risk of burns.

Safety

1044-004

157932-002

125670-003

► Release pressure on the system/wait for pressure

to drop.

► Leave liquids to cool.

► Wear suitable protective clothing.

124851-001

Environment!

Lubricants, operating utilities and fuels escape into the environment.

Environmental pollution.

► Collect and store lubricants, operating utilities and

fuels in suitable containers and ensure proper disposal.

Neither retighten nor open any piping and hoses

►

under pressure.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 39

Safety General Information

1044-004

Work on the Common Rail System

161964-002

NOTICE

Unprofessional installation on Common Rail system.

Damage to Common Rail system.

► All work on components of the Common Rail

system may be carried out only by specially trained personnel.

► Prior to starting work, the engine must be

standing still for at least 5 minutes in order to relieve the pressure in the pressure pipe or pressure reduction must be controlled with the CDS.

► Absolute cleanliness must be ensured during all

work in all areas.

► Prior to any work on the clean side of the fuel

system, the engine and the engine compartment must be cleaned (e.g. steam jet cleaner) with the fuel system remaining closed.

► Absolutely avoid moisture.

► Slackened-off inlet connectors must always be

replaced.

► Plugs once used for high-pressure lines, pressure

pipe and injectors must not be re-used.

► Observe the sequence specified in the description

when tightening the injectors, high-pressure lines, pressure pipe and inlet connector.

161966-002

NOTICE

Unclosed components.

Damage to the Common Rail system.

► Dismount only one fuel line at a time.

► Close the component connections immediately

with new and clean caps.

Working on the electric system

Start the engine only with firmly connected

►

batteries. Do not disconnect the batteries while the engine

►

is running. Do not use any quick-charging devices for starting

►

the engine.

► Assist-starting only with separate batteries.

The connections of control units may be

►

disconnected and connected only with the electric system switched off.

40 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

General Information

Incorrect polarity of the control units may cause

►

their destruction. Always tighten the connections on the injection

►

system to the specified tightening torques. When temperatures above 80 °C must be

►

expected, the control units must be removed. Use only suitable testing lines for measurements

►

on connectors. Observe the manufacturer's regulations for

►

batteries. Wear protective clothing when handling batteries.

►

Do not tilt the batteries, acid might escape.

►

Measure the voltage only with a suitable

►

measuring device. Electrolytic gas may form in closed battery boxes.

►

► Be particularly careful after the engine has

run for an extended period and after charging the battery with a charger.

When disconnecting the batteries, non-

►

disconnected continuous consumers may generate sparks that ignite the gas.

► Vent the battery box sufficiently prior to

disconnecting.

Avoid short-circuits by wrong polarity or placing

►

metal objects on the battery terminals. Disconnect batteries when the engine has been

►

shut down and recharge every four weeks.

Safety

1044-004

Working on the hydraulic system

64831-003

WARNING

Residual oil pressure in hoses / hydraulic components.

Serious injury of eyes / of skin.

► Relieve the residual oil pressure in the hydraulic

system.

11741-003

NOTICE

Serious damage to hydraulic circuit components.

► Before installing hydraulic system components,

the entire hydraulic circuit and the hydraulic system components remaining on the machine must be flushed.

► The entire hydraulic system must be free of dirt

and foreign objects.

► Replace the hydraulic oil filter.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 41

Safety General Information

Electric welding

Observe the welding information sheets.

►

Disconnect the batteries.

►

Fit earthing point of the welder close to the

►

welding spot. Disconnect the control units.

►

Painting work

During painting work, electronic components may

►

be exposed to high temperatures (up to 95 °C) only for a short time.

Disconnect the batteries.

►

Remove sensitive electric components.

►

Screw fittings of high-pressure lines must not be

►

painted. Danger of introducing dirt in case of repairs.

Working with urea solution

1044-004

124844-004

CAUTION

Contact with urea solution.

Danger of injury.

► Wash your skin thoroughly with water and soap.

See a doctor if necessary.

► Flush eyes thoroughly with plenty of water. See a

doctor if necessary.

► Flush mouth and drink plenty of water. See a

doctor if necessary.

149012-002

NOTICE

Foreign substances pollute the system

Damage to exhaust gas system.

► Keep foreign substances and residual quantities

of diesel fuel out of this system.

► Increased cleanliness requirements during

installation work.

42 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

NOTICE

Surfaces get in contact with urea solution.

Component corrosion.

► Flush the surfaces concerned with plenty of water

immediately.

Information on how to avoid damage and premature wear

General

Engines are built exclusively for the intended use

–

according to the shipping package. Unauthorised modifications on the engine will

–

exclude any liability of the manufacturer for any resulting damage.

Manipulations on the injection and control system may also influence the output and waste gas behaviour.

Meeting the statutory environmental protection requirements is no longer guaranteed in this condition.

If any trouble occurs during operation, locate and

–

remove the reason immediately. Clean the engine thoroughly before starting

–

repairs.

- Ensure that no dirt, sand or foreign objects

Only use genuine CLAAS spare parts.

–

Never let the engine run dry.

–

Never let the engine run without coolant.

–

Fit a corresponding note on engines that are not

–

ready for operation. Use only operating utilities approved by CLAAS.

–

Do not fill in engine oil beyond the maximum level

–

mark.

Safety

General Information

1044-004

124885-005

157737-001

end up inside the engine.

157745-001

Liability limitation

General

All information and notes in this manual were

►

compiled considering the standards and regulations in force, the state of the art and many years of experience.

CLAAS will not assume any liability for damage

►

caused by:

► failure to comply with this manual ► use not in line with the intended use ► use of non-trained personnel ► unauthorised conversions ► technical modifications ► use of non-approved spare part and

operating utilities

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 43

Safety General Information

Shutting down and storage

Shutting down the engine for an extended period

►

of time requires temporary corrosion protection.

Regulations for avoiding health and environmental damage

Precautionary measures for protection against health and environmental damage

Avoid extended, excessive or repeated skin

►

contact with operating utilities, auxiliary operating utilities, diluents or solvents.

Protect your skin by suitable skin protection

►

agents or protective gloves. Do not use any operating utilities, auxiliary

►

operating utilities, diluents or solvents for cleaning of skin.

► Wash polluted skin thoroughly with water and

soap.

Change oil-soaked clothing and shoes.

►

Do not put any oil-soaked rags into the pockets of

►

your working clothes.

1044-004

157747-001

Information for working on the diesel engine

Disposal of operating utilities and auxiliary operating utilities

Observe the regulations of the local authorities.

►

Ensure that no operating utilities will end up in the

►

soil, sewer or in waters. Different operating utilities must be collected and

►

disposed of in different containers. Use tight containers for draining operating utilities.

►

► Ensure that food or drink containers are

never used - danger of confusion.

Ensure that operating utilities are correctly

►

disposed of.

► Operating utilities count among the water-

hazardous substances!

Accident protection

Fuel jets may cut the skin.

►

Fire hazard due to fine spraying of fuel.

►

Avoid standing near the running engine.

►

Never slacken off the screw fittings of fuel lines

►

while the engine is running. The lines may be under very high pressure (up to

1800 bar). The engine must have been stopped for at least 5

►

minutes before slackening off the fuel lines.

► Check the line pressure values with the CDS

if necessary.

Do not touch live parts of electric connections

►

while the engine is running.

157748-002

44 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Safety

General Information

1044-004

Persons wearing a pacemaker must not come

►

closer than 20 cm to the running engine. Any modifications of the original engine cabling

►

may result in exceeding threshold values of the pacemaker regulations.

Cleanliness

Diesel injection components consist of high-precision parts that are subject to extreme loads. In view of this high-precision equipment, maximum cleanliness must be ensured during all work on the fuel system. Even dirt particles measuring more than 0.002 mm may make components fail.

Before starting work, absolutely comply with the rules below:

Clean engine and engine compartment before

►

starting the work.

► Ensure that the fuel system is closed here. ► When using a jet cleaner, do not aim directly

on electric components or fit covers.

Clean tools and working materials before starting

►

work.

► Use only undamaged tools.

Cover up engine compartment areas where dirt

►

particles may come off with a new and clean dust film.

Wash your hands before starting dismounting and

►

put on fresh working clothing. Carry out a visual inspection for leaks and

►

damage on the fuel system. Remove any loose dirt particles such as paint

►

chips and insulation material with a suitable suction device.

When removing and installing components, no

►

materials such as cloths, cardboard or wood may be used as these materials may lose particles and fibres.

Carefully remove paint chippings resulting from

►

slackening off bolts before completely removing the bolts.

Place the engine in a clean area of the workshop

►

where no work is carried out that raises dust. Avoid air motion (possible raising of dust by

►

starting engines, workshop ventilation or heating system, air draught etc.).

Clean and dry the area of the still closed fuel

►

system with compressed air.

► After opening the clean-side fuel system, use

of compressed air for cleaning is no longer allowed.

Use only non-fluff cleaning cloths on the fuel

►

system. Close connecting openings of all removed parts of

►

the clean-side fuel system immediately with suitable caps.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 45

Safety General Information

► Caps must be packed dust-tight before use

and must be disposed of after using them once.

Keep components carefully in a clean and closed

►

container.

► Never use pre-used cleaning or testing

liquids for these components.

New parts may be taken out of their original

►

packaging only just before using them. Carry out work on removed components only at a

►

workplace equipped for this purpose. If removed parts are dispatched, always use the

►

original packaging of the new part.

Installation instructions

Piping of all kinds must not be bent, risk of

►

cracking! Regulations for flawless installation of flat seals:

►

► Only use genuine CLAAS seals. ► Sealing faces must be undamaged and

clean. ► Do not use any sealants or glues. ► Tighten bolts evenly to the specified torque.

Regulations for flawless installation of round

►

seals:

► Only use genuine CLAAS seals. ► Sealing faces must be undamaged and

clean. ► Always wet O-rings with engine oil according

to the manufacturer's specification when

installing.

1044-004

Engine overhaul

The service life of an engine is influenced by very different factors. Specifying a certain number of operating hours for basic overhauls is therefore not possible.

Opening an engine or a basic overhaul is not appropriate as long as the engine has good compression values and the following operating values have not significantly changed as compared with those measured and accepted upon commissioning:

Charge pressure.

►

Exhaust gas temperature.

►

Coolant and lubricating oil temperature.

►

Oil pressure and oil consumption.

►

Smoke behaviour.

►

The criteria below have major influence on the engine's service life:

Correct setting of output, depending on the type of

►

use. Proper installation.

►

46 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Safety

General Information

1044-004

Acceptance of installation by authorised

►

personnel. Regular maintenance according to the

►

maintenance schedule. Selection and quality of lubricating oil, fuel and

►

coolant according to the manufacturer's specifications.

Putting into operation after an engine overhaul

Pre-fill the engine with engine oil after finishing repair, i.e. in dry condition, before putting it back into operation. This process can also be applied when establishing damage and reasons.

On all engines that have not been pre-filled with lubricating oil, the danger of premature damage to the bearing surface is very big because the lubrication oil fed by the oil pump from the oil sump takes relatively long before it reaches the individual bearings.

Such initial damage will not necessarily make the bearings fail, but can affect bearing function and reduce the service life.

First aid measures

Pre-filling the engine with engine oil:

Page 178

Inhaling:

Give the person fresh air and consult a doctor

–

depending on his or her symptoms. Remove the person from the danger area.

–

Contact with the eyes:

Rinse the eyes thoroughly with large amounts of

–

water for several minutes. Consult a doctor if required.

Contact with the skin:

Wash thoroughly with plenty of water and soap,

–

remove polluted and soaked clothing immediately, consult a doctor if the skin is irritated (e.g. reddening).

Swallowing:

Do not induce vomiting; consult a doctor

–

immediately.

123242-003

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 47

01 Engine 0102 Complete component

01 Engine

1044-004

0102 Complete component

Type design

The engines of the OM 906 LA and OM 926 LA series are available in three different versions.

These are differentiated by the different type designs:

Series Type design Exhaust gas level Note!

OM 906 LA

OM 926 LA

OM 926 LA 926.959

Engine data

Designation

Dry weight 530 kg

Wet weight 573 kg

906.991

926.929

926.970

Tier 3 / Stage IIIA

Tier 4i / Stage IIIB

OM 906 LA

Value

162116-001

162117-001

Engine type In-line engine

Number of cylinders 6

Cylinder bore 102 mm

Cylinder stroke 130 mm

Cubic capacity 6.370 cm³

Direction of rotation of engine when viewing the flywheel Left

OM 926 LA

Designation

Value

Dry weight 530 kg

Wet weight 573 kg

Engine type In-line engine

Number of cylinders 6

Cylinder bore 106 mm

Cylinder stroke 136 mm

Cubic capacity 7.200 cm³

Direction of rotation of engine when viewing the flywheel Left

48 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Engine description

Engine components

01 Engine

0102 Complete component

1044-004

162119-002

188319-001 32

Designation

1 Valve cover Page 118

2 Urea heater valve

Page 263

Applies to: Type designs 926.959 and 926.970

3 Cylinder head Page 121

4 Flywheel Page 111

5 Compressor Page 251

6 Plug-on pump Page 167

7 MR/PLD control unit Page 256

8 Fuel filter Page 175

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 49

01 Engine 0102 Complete component

1044-004

188320-001 33

Designation

1 Intake housing Page 232

2 Oil filter housing Page 184

3 Coolant pump Page 201

4 Fuel pump Page 172

5 Oscillation damper Page 109

6 Alternator 24 V

Page 245

Applies to: Type designs 926.959 and 926.970

7 Alternator 12 V Page 240

8 Oil cooler Page 189

9 Exhaust turbo charger Page 218

10 Electric starting motor

11 Exhaust manifold Page 213

12 Urea dosing unit

Applies to: Type designs 926.959 and 926.970

Page 277

50 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Sensors

01 Engine

0102 Complete component

1044-004

188321-001 34

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 51

01 Engine 0102 Complete component

Value CCN Remark / designation

1 B65-MB Coolant temperature sensor Page 201

1044-004

2 A6-MB

MR/PLD control unit Page 256

(A015)

3 B16-MB Camshaft position sensor

4 B15-MB Crankshaft position sensor Page 77

5 B111-MB Charge air temperature and pressure sensor Page 232

6 B14-MB Oil level sensor Page 63

7 B12-MB Oil pressure sensor Page 189

8 B11-MB Oil temperature sensor Page 189

9 Y109-MB

Urea dosing valve Page 279

(Y487)

10 B128-MB Dosing unit air pressure sensor Page 279

11 B130-MB Urea temperature sensor Page 279

12 B129-MB

Urea pressure sensor Page 279

(B360)

13 B10-MB Fuel temperature sensor

Tightening torques not specified, see section on tightening torques

52 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Ignition order

01 Engine

0102 Complete component

1044-004

188322-001 35

The piston (1) is at the ignition top dead centre (ignition TDC) when the synchronous piston (6) is at the valve overlap top dead centre (overlap TDC).

The intake valves and the exhaust valves are relieved at the ignition top dead centre.

When at the overlap top dead centre, the intake valves and the exhaust valves are loaded.

Piston position

Cylinder / injection order

Overlap TDC 1 5 3 6 2 4

Ignition TDC 6 2 4 1 5 3

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 53

01 Engine 0102 Complete component

Cranking the engine

1044-004

162184-002

The engine can be cranked by hand both in built-in condition and in removed condition.

Depending on the variant, different special tools are available for this.

In order to avoid damage to the special tool, it is

–

important to use the respective special tool only for the specified application!

This is why this chapter is sub-divided into two sections:

Cranking the engine in built-in condition: Page

Cranking the engine in removed condition: Page

54 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

01 Engine

0102 Complete component

1044-004

Special tool for built-in engine

The following tools of special tool kit 00 0181 932 0 are needed:

Special tool Pcs.

1 Cranking tool

00 0181 751 0

2 Spacer sleeve

00 0953 440 0

3 Hex. bolt

180243-001

ISO 4017 M16x80

00 0237 841 0

Compose special tools using the table below, depending on the machine in question:

Machine Special tool Part number

TUCANO Page

Cranking tool

Spacer tube

Hex. bolt

00 0181 751 0

00 0953 440 0

00 0237 841 0

Special tools for removed engine

Special tool Pcs.

147485-001

1 Cranking tool

00 1992 902 0

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 55

01 Engine 0102 Complete component

Cranking the engine in built-in condition

TUCANO

Remove bracket (2).

►

1044-004

173942-001

170310-001 39

Screw on special tool (1) ( Page 55) through

►

openings (C) of the cranking tool.

56 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

01 Engine

0102 Complete component

1044-004

173943-001

188340-001

Crank engine at (1) until the desired crankshaft

►

position is reached.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 57

01 Engine 0102 Complete component

Cranking the engine in removed condition

Unscrew plate (1).

►

1044-004

180254-001

180255-001

Using the special tool: Page 55

Fit special tool at (1).

►

Crank engine until the desired crankshaft position

►

is reached.

58 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

0105 Engine suspension

01 Engine

0105 Engine suspension

1044-004

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 59

01 Engine 0105 Engine suspension

Lifting eyes

Technical specifications

1044-004

162197-001

188362-001 44

1 Crankcase lifting eyes, front

Value CCN Remark / designation

See coolant pump

Page 201

2 210 Nm Crankcase lifting eyes, rear

Tightening torques not specified, see section on tightening torques

60 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

0110 Engine housing

01 Engine

0110 Engine housing

1044-004

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 61

01 Engine 0110 Engine housing

Oil sump

1044-004

162348-001

Special tool

Special tool (I) Pcs.

39225-002

1 Sealing compound

00 0217 602 0

62 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Technical specifications

01 Engine

0110 Engine housing

1044-004

188475-001 46

Value CCN Remark / designation

1 19 kg Oil sump

2 Seal

3 25 Nm Oil pan mounting bolts

4 65 Nm Oil drain plug

5 65 Nm B14-MB Oil level sensor

Tightening torques not specified, see section on tightening torques

Removal

Drain the engine oil.

►

See the Operator's Manual of the machine in question.

Remove the alternator. Page 247

►

Applies to type designs:

926.959

926.970

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 63

B14-MB

01 Engine 0110 Engine housing

Unscrew the oil level dipstick (1).

►

1044-004

188494-001

188495-001

Disconnect cable connector from sensor (B14-

►

MB) at (1) and unscrew at (2).

Unscrew oil drain hose (1).

►

188496-001

Unscrew all bolts (2) and remove oil pan (1).

►

► Ensure that no more cables or lines are

attached to the oil pan.

188497-001

64 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Remove seal (1) from the oil pan.

►

01 Engine

0110 Engine housing

1044-004

188498-001

Installation

Clean all sealing faces. Page 19

►

Place a new seal (1) on the oil pan.

►

Use special tool (I). Page 62

Clean all sealing faces. Page 19

►

Apply special tool (I) at the separating

►

points (arrows) with the timing housing and the front housing cover.

188499-001

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 65

B14-MB

01 Engine 0110 Engine housing

Bolt down oil pan (1) with bolts (2).

►

Tightening torque: Page 63

1044-004

188497-001

188496-001

Bolt down oil drain hose (1).

►

Tightening torque: Page 63

Connect cable connector to sensor (B14-MB)

►

at (1) and screw on at (2).

188495-001

Bolt down oil level dipstick (1).

►

188494-001

66 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

0110 Engine housing

Top up engine oil.

►

See the Operator's Manual of the machine in question.

Install the alternator. Page 247

►

Applies to type designs:

926.959

926.970

01 Engine

1044-004

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 67

01 Engine 0110 Engine housing

Crankshaft front seal

1044-004

162370-003

Special tool

Special tool (I) Pcs.

237684-001

1 Installation tool

00 1995 525 0

68 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Technical specifications

01 Engine

0110 Engine housing

1044-004

188520-001 59

1 Radial seal

Value CCN Remark / designation

Observe the installation position.

Coat the inner contact face slightly with engine oil.

Replace the seal with every installation.

2 Crankshaft Page 98

3 Oil pump Page 193

Tightening torques not specified, see section on tightening torques

Removal

Remove the oscillation damper. Page 109

►

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 69

01 Engine 0110 Engine housing

Drill two Ø 3 mm holes into seal (1).

►

Screw two self-tapping screws 4.8x25 mm into the

►

bores. Pull out the seal (1) at the self-tapping screws.

►

1044-004

188521-001

188536-001

Check the contact face of the radial seal on the

►

crankshaft flange.

► When run-in traces exist, replace the

crankshaft. Page 101

Installation

Use special tool (I). Page 68

►

Slide the new seal (1) over mounting sleeve (2).

►

Apply a little oil to the seal on the inside only.

► Ensure that the dust lip (arrow) makes

complete contact with the mounting sleeve.

Clean the sealing faces on the crankshaft

►

flange (1) and on the oil pump housing (2). Page 19

Screw on punch (3) on the crankshaft flange (1),

►

using bolts (4).

188537-001

70 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

0110 Engine housing

Slide the mounting sleeve (1) with the inserted

►

seal (2) over punch (3).

► Ensure that the mounting sleeve covers up

the crankshaft flange (4).

01 Engine

1044-004

188539-001

188540-001

Slide locator tool (1) over punch (2).

►

► Align the recess on the locator tool to the

raised section of the oil pump housing at (4).

Bolt down nut (3) until the locator tool (1) makes

►

contact at the oil pump housing.

The installation depth of the seal is defined by special tool (I).

Remove special tool (I).

►

Install the oscillation damper. Page 109

►

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 71

01 Engine 0110 Engine housing

Crankshaft rear seal

1044-004

162376-003

Special tool

Special tool (I) Pcs.

237672-001

1 Pull-in device

00 1995 513 0

72 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Technical specifications

01 Engine

0110 Engine housing

1044-004

188562-001 66

1 Crankshaft rear radial seal

Value CCN Remark / designation

Observe the installation position.

Coat the inner contact face slightly with engine oil.

2 Flywheel Page 111

3 Crankshaft Page 98

4 Crankshaft housing

Tightening torques not specified, see section on tightening torques

Removal

Remove the torsion dampers.

►

► See the repair manual of the machine in

question.

Remove the flywheel. Page 113

►

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 73

01 Engine 0110 Engine housing

Remove radial seal (1), using a suitable tool (2).

►

1044-004

183372-001

188565-001

Check the contact face of the radial seal on the

►

flywheel flange.

► When run-in traces exist, replace the

flywheel. Page 113

Installation

Use special tool (I). Page 111

►

Slide a new radial seal (1) over flange (2).

►

Apply a little oil to the seal on the inside only.

188570-001 69

Slide sleeve (1) over the crankshaft flange (2).

►

Place flange (3) with seal (4) inserted over

►

sleeve (1).

74 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

01 Engine

0110 Engine housing

1044-004

► Ensure that dowel pin (6) is inserted into the

hole (arrow).

Screw in two bolts (5) of the flywheel.

►

188571-001 70

Slide sleeve (1) over flange (2).

►

Push seal (4) into the timing housing (5) by

►

tightening nut (3) until a stop is felt.

The installation depth of the seal is defined by special tool (I).

Remove special tool (I) completely.

►

Check if inner dust lip of the seal is damaged.

►

Install flywheel. Page 114

►

Install the torsion damper.

►

► See the repair manual of the machine in

question.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 75

01 Engine 0110 Engine housing

Timing housing

1044-004

162379-002

Special tool

Special tool (I) Pcs.

39225-002

1 Sealing compound

00 0217 602 0

76 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Technical specifications

01 Engine

0110 Engine housing

1044-004

188592-001 72

Value CCN Remark / designation

1 Timing housing

2 Flywheel Page 111

3 B15-MB Crankshaft position sensor

4 Crankshaft rear seal Page 72

5 50 Nm Timing housing mounting bolts

6 25 Nm TDC inspection hole cap bolt

Tightening torques not specified, see section on tightening torques

Removal

Remove the engine.

►

See the repair manual of the machine in question. Remove the starter. Page 236

►

Remove the compressor. Page 251

►

Remove the flywheel. Page 113

►

Remove oil pan. Page 63

►

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 77

B15-MB

01 Engine 0110 Engine housing

Remove sensor (B15-MB).

►

1044-004

188604-001

188605-001

Ensure that all wiring looms and lines have been

►

removed from the timing housing (2). Suspend the timing housing (2) in a suitable lifting

►

equipment. Unscrew all bolts (1).

►

Remove timing housing (2) carefully from the

►

crankcase.

Clean the sealing faces. Page 19

►

Remove the crankshaft rear seal. Page 73

►

Installation

Install a new crankshaft rear seal. Page 74

►

Use special tool (I). Page 76

Apply special tool (I) at the sealing faces.

►

Suspend the timing housing (1) in a suitable lifting

►

equipment and carefully place it next to the crankcase.

Bolt down all bolts (2).

►

Tightening torque: Page 77

188606-001

78 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Insert sensor (B15-MB).

B15-MB

►

01 Engine

0110 Engine housing

1044-004

188604-001

Install the oil pan. Page 65

►

Install flywheel. Page 114

►

Install the compressor. Page 253

►

Install the starter. Page 238

►

Install the engine.

►

See the repair manual of the machine in question.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 79

01 Engine 0110 Engine housing

Oil separator

Technical specifications

1044-004

162479-002

189000-001 77

1 Oil separator

Value CCN Remark / designation

Ensure that the guide rod is inserted into the

–

retainer.

2 Membrane

Replace the damaged membrane.

–

3 Seal

4 Valve cover Page 118

Tightening torques not specified, see section on tightening torques

80 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

0115 Engine unit

01 Engine

0115 Engine unit

1044-004

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 81

01 Engine 0115 Engine unit

Piston

1044-004

162382-002

Special tool

Special tool (II) Pcs.

251089-001

1 Piston ring expander

00 1995 646 0

Special tool (III) Pcs.

1 Piston ring compressor

00 0147 999 0

181552-001

39240-002

Special tool (IV) Pcs.

Clock gauge

60 0500 530 3

82 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

01 Engine

0115 Engine unit

Special tool (V) Pcs.

1044-004

147499-001

Measuring gauge holder

00 1992 870 0

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 83

1.1

01 Engine 0115 Engine unit

Technical specifications

1044-004

182244-001 82

84 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Value CCN Remark / designation

01 Engine

0115 Engine unit

1044-004

1 Piston

Marking (1.1) for installation position and installation point.

2 Cylinder liner is not provided!

3 Piston ring - double trapezoidal ring

4 Piston ring - tapered compression ring with

inside angle

5 Piston ring - chamfered ring with coil spring

6 Connecting rod Page 91

7 Crankshaft Page 98

8 Oil spray nozzle Page 181

9 Slightly coat piston pin with engine oil

a Height play of piston rings is not provided!

b Push play of piston rings

Piston ring (3): 0.40 to 0.60 mm

Piston ring (4): 0.40 to 0.60 mm

Piston ring (5): 0.25 to 0.50 mm

c 0.280 to

Piston excess dimension

0.500 mm

Tightening torques not specified, see section on tightening torques

Removal

Remove oil pan. Page 63

►

Remove the oil spray nozzles. Page 182

►

Remove the cylinder head. Page 124

►

► Ensure that all bores on the separating face

Fit a direction arrow indicating the installation

►

position of the piston.

► This is required only when the direction

► The direction arrow must point against the

Mark the cylinder number on the piston head.

►

► This is required only if more than one piston

Twist crankshaft until the piston is at the BDC.

►

See Cranking the engine. Page 54 Protect piston head and crankcase against dirt.

►

of the crankcase are tightly closed.

arrow is no longer visible.

power output side.

is removed.

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 85

2 1

01 Engine 0115 Engine unit

Carefully loosen combustion residues at the head

►

land zone at (1) in the cylinder track (2) with a scraper and remove with compressed air.

1044-004

188633-001

188631-001

Mark the installation position of connecting rod (1)

►

and connecting rod bearing cap (2) with respect to one another.

Unscrew bolts (3).

►

Remove connecting rod bearing cap (2).

►

► Ensure that the cracked separating surface is

damaged neither at the connecting rod nor

on the connecting rod bearing cap. ► Replace the connecting rod if necessary.

Mark the installation position of connecting rod

►

bearing shell (4) with respect to the connecting rod bearing cap (2).

Remove connecting rod bearing shell (4) from

►

connecting rod bearing cap (2). Push piston (5) out at the connecting rod bearing

►

seat, using a wooden or plastic rod and remove it carefully.

Mark the installation position of the connecting rod

►

bearing shell (4) relative to the connecting rod (1). Remove the connecting rod bearing shell (4) from

►

connecting rod (1).

181335-001

Disassembly

Clamp the connecting rod with the piston in a

►

vice.

► Ensure to use soft cheeks for clamping.

86 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Use special tool (II). Page 82

a2301254

Remove piston rings (1).

►

01 Engine

0115 Engine unit

1044-004

181395-001

181396-001

171465-001

Remove piston pin (1).

►

Remove piston (2) from connecting rod (3).

►

Mark piston pin (1) and connecting rod (2) with

►

respect to the piston (3) in question.

Checking

Check piston for dust damage, seizing traces,

►

scratches, cracks or other traces of wear. Replace piston if necessary.

Checking the joint play (b) of the piston rings:

►

► Clean the cylinder liner. ► Insert and align piston ring (1) into the

cylinder liner (3) in the bottom unused area.

► Remove the coil spring from the chamfered

ring. ► For aligning, use piston without piston rings. ► Check joint play (b) with a feeler gauge (2). ► Joint play: Page 84

Check the joint play on all piston rings.

►

► When one piston ring is worn, all piston rings

of the piston in question must be replaced.

Assembly

Check piston and piston rings. Page 87

►

Check the connecting rods. Page 92

►

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 87

a2301248

01 Engine 0115 Engine unit

181396-001

Assemble piston (2) and connecting rod (3) by

►

inserting the piston pin (1).

► It must be possible to push the piston pin (1)

into the piston easily with the fingers and the piston pin must not slide out again due to its

own weight. ► Apply a little oil to the piston pin. ► Observe the installation position. ► In addition, observe the specifications of the

Page 91

Insert circlips.

►

"Connecting rod" chapter.

1044-004

171363-001

181508-001

Use special tool (II). Page 82

Install piston rings (1).

►

► Observe the installation position of the

different piston rings. ► See technical specifications: Page 84 ► Ensure that the "TOP" mark (2) points

upwards. ► Ensure that the joint ends of the piston ring

are installed with a 120° offset with respect

to one another.

Installation

Check the cylinder bore. Page 95

►

Check connecting rod bearing pin of the

►

crankshaft. Page 102

88 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Use special tool (III). Page 82

III

Insert ram (1).

►

Observe the installation position.

01 Engine

0115 Engine unit

1044-004

181553-001

181558-001

Slide the piston into the cylinder line until

►

connecting rod (1) makes firm contact with the connecting rod bearing pin (2) of the crankshaft.

Insert connecting rod bearing shell (3).

►

Position connecting rod bearing cover (1) together

►

with the connecting rod bearing shell. Screw on the bolts (2).

►

► Tightening torque: Page 84

181563-001

Measure the piston excess dimension. Page

►

Install the cylinder head. Page 126

►

Install the oil spray nozzles. Page 183

►

Install the oil pan. Page 65

►

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 89

01 Engine 0115 Engine unit

Measuring the excess dimension

Using special tools (IV) and (V): Page 82

Measure the piston excess dimension (c) without

►

the cylinder head gasket being in place. Piston excess dimension: Page 84

► Ensure that no deposits or soiling

accumulates on the piston head and on the

cylinder head surface.

Measure the piston excess dimension (c) in the

►

direction of the piston pin at (1) in order to eliminate the piston slap play.

1044-004

181596-001

250748-001

90 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Connecting rod

Technical specifications

01 Engine

0115 Engine unit

1044-004

162393-001

182448-001 97

1 Connecting rod

Value CCN Remark / designation

Observe marks at (5).

2 Connecting rod bearing cover

Observe marks at (5).

3 Connecting rod bearing shells

Do not confuse the connecting rod bearing shells.

4 Connecting rod bolt

Tighten the bolts in three steps:

10 Nm

45 Nm

90°

5 Mark of connecting rod - connecting rod bearing

Observe the shaft length (c).

cover

Tightening torques not specified, see section on tightening torques

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 91

01 Engine 0115 Engine unit

Value CCN Remark / designation

1044-004

a Connecting rod bearing inner diameter

(with the connecting rod bearing shells inserted)

Standard: 70.054 to 70.093 mm

Deviation 0.1: 69.954 to 69.993 mm

Deviation 0.25: 69.804 to 69.843 mm

Deviation 0.5: 69.554 to 69.593 mm

Deviation 0.75: 69.304 to 69.343 mm

Deviation 1.0: 69.054 to 69.093 mm

b Connecting rod play

Radial: 0.039 to 0.098 mm

Axial: 0.170 to 0.470 mm

c up to 57.0 mm Shaft length of connecting rod bolt (4)

Tightening torques not specified, see section on tightening torques

Removal

Remove the piston. Page 85

►

Disassemble the piston. Page 86

►

Checking

Check the connecting rod bearing inner

►

diameter (a).

► Check the connecting rod bearing inner

diameter on the assembled connecting rod. ► Check the measuring positions in the

specified order (1., 2. and 3.). ► The second and third measuring positions

are twisted by around 60° each relative to

the first measuring position. ► Calculate the average value from the three

measured values.

Checking the connecting rod play (b):

►

► When subtracting the mean diameter value

of the connecting rod bearing pin from the

mean value of the connecting rod bearing

inner diameter, the connecting rod play is

obtained. ► Example: ► Connecting rod bearing inner diameter:

94.062 mm

► Diameter of connecting rod bearing pin:

93.990 mm (see technical data of

crankshaft Page 99) ► b = 94.062 mm - 93.990 mm = 0.072 mm

92 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

2 3

01 Engine

0115 Engine unit

1044-004

182462-001 98

Checking the connecting rod bearing shells:

►

Bearing housing without damage.

► The surface is even and smooth, without

visible scores and without run-in wear.

► The bearing shell can be re-used.

Bearing shell with minor scores and scratches.

► Scores and scratches are barely visible on

the surface. ► The bearing shell can be re-used. ► Check if engine oil and oil filter are soiled.

Bearing shell with heavy scores.

► The surface scores can be easily seen and

felt. ► Do not re-use this bearing shell. ► Check if engine oil and oil filter are soiled.

Installation

Check the connecting rod bearing pin.

►

See crankshaft. Page 102 Check the connecting rods. Page 92

►

Assemble the piston. Page 87

►

Install the piston. Page 88

►

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 93

01 Engine 0115 Engine unit

Cylinder bore

Technical specifications

1044-004

162397-002

188661-001 99

Value CCN Remark / designation

1 Crank case

2 Cylinder bore

a Diameter of cylinder bore

Applies to type design 906.9xx

Standard: 101.985 to 101.991 mm

Deviation -0.3: 102.285 to 102.291

Deviation -0.6: 102.585 to 102.591

Deviation -0.9: 102.885 to 102.891

a Diameter of cylinder bore

Applies to type design 926.9xx

Standard: 105.985 to 105.991 mm

Deviation -0.3: 106.285 to 106.291

Deviation -0.6: 106.585 to 106.591

Deviation -0.9: 106.885 to 106.891

Tightening torques not specified, see "Introduction / Tightening torques" chapter

94 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Value CCN Remark / designation

01 Engine

0115 Engine unit

1044-004

b Crankcase height

Standard: 298.33 to 298.40 mm

Deviation -0.3: 298.03 to 298.10

Deviation -0.6: 297.73 to 297.80

Deviation -0.9: 297.43 to 297.50

c up to 0.1 mm Wear of cylinder bore at the upper point of

return of the first piston ring

0.012 mm Maximum deviation of cylinder shape

Tightening torques not specified, see "Introduction / Tightening torques" chapter

Checking

Measure the diameter of cylinder bore (a) in the

►

unused section above the upper point of return of the first piston ring.

Carry out measurement in direction of measurement (x) and (y).

Observe the deviation from the cylinder shape (c). Measure the wear of cylinder track at measuring

►

points (1) and (2), in measuring direction (x) and (y) in each case.

Measure the crankcase height (b).

►

When the largest allowed diameter is exceeded, replace the crankcase.

The cylinder bore and the crankcase height may only be jointly machined and must meet the same dimensional category. Otherwise assigning the pistons is not possible.

Incorrectly assigned pistons may cause engine damage.

100

188672-001

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 95

01 Engine 0115 Engine unit

Gear of crankshaft

1044-004

162405-001

Special tool

Special tool (I) Pcs.

147453-001

101

1 Punch

00 1992 879 0

96 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

01 Engine

0115 Engine unit

1044-004

188707-001 102

Value CCN Remark / designation

1 Gear of crankshaft

2 Crankshaft Page 98

3 Camshaft gear

4 Markings

Tightening torques not specified, see "Introduction / Tightening torques" chapter

Installation instructions

Removal:

Remove the timing housing. Page 77

–

Rotate the crankshaft until markings (4) of the

–

crankshaft gear (1) and of the camshaft gear (3) face one another.

Pull off the crankshaft gear (1) with special tool (I).

–

Installation:

Slide on crankshaft gear (1) with special tool (I).

–

Observe markings (4). Check if dowel pins are tightly seated, replace

dowel pins if required. Install the timing housing. Page 78

–

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01 Engine 0115 Engine unit

Crankshaft

1044-004

162407-001

Special tool

Special tool (II) Number

39240-002

103

1 Clock gauge

60 0500 530 3

Special tool (III) Number

1 Extension

00 1992 875 0

147530-001

183116-001

104

105

Special tool (IV) Number

1 Measuring gauge holder

60 0500 530 5

98 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Technical specifications

01 Engine

0115 Engine unit

1044-004

Representation on a 4-cylinder engine 188823-001 106

Value CCN Remark / designation

1 51 kg Crankshaft

2 Main bearing cover

3 Flange bearing cover

4 Bolt of main and flange bearing cover

Observe the shaft length (m).

–

Tighten bolts in 4 steps as per tightening

–

specification.

Tightening specification:

30 Nm

80 Nm

155 Nm

90°

5 Coat bearing shells with engine oil.

Do not replace the bearing shells individually.

When a bearing shell is no longer OK, all bearing shells must be replaced.

Tightening torques not specified, see section on tightening torques

00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 99

01 Engine 0115 Engine unit

Value CCN Remark / designation

1044-004

6 Coat thrust washers with engine oil.

Do not replace thrust washers individually.

When a thrust washer is no longer OK, all thrust washers must be replaced.

7 Gear of crankshaft Page 96

b up to 0.15 mm Maximum radial runout at the centre main

crankshaft journal

c Diameter of main and flange bearing journal

Standard: 85.990 to 86.010 mm

Deviation 0.1: 85.890 to 85.910 mm

Deviation 0.25: 85.740 to 85.760 mm

Deviation 0.5: 85.490 to 85.510 mm

Deviation 0.75: 85.240 to 85.260 mm

Deviation 1.0: 84.990 to 85.010 mm

d 31.0 to

Width of main bearing journal

31.2 mm

e Width of flange bearing journal

Standard: 31.000 to 31.062 mm

Deviation 0.1: 31.000 to 31.062 mm

Deviation 0.25: 31.300 to 31.362 mm

Deviation 0.5: 31.500 to 31.562 mm

Deviation 0.75: 31.500 to 31.562 mm

Deviation 1.0: 31.500 to 31.562 mm

f Inner diameter of crankshaft main and flange

bearing

Standard: 86.066 to 86.108 mm

Deviation 0.1: 85.966 to 86.008 mm

Deviation 0.25: 85.816 to 85.858 mm

Deviation 0.5: 85.566 to 85.608 mm

Deviation 0.75: 85.316 to 85.358 mm

Deviation 1.0: 85.066 to 85.108 mm

g 0.056 to

Radial play

0.118 mm

k 0.16 to

Axial play

0.38 mm

Tightening torques not specified, see section on tightening torques

100 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014

Mercedes-Benz OM906LA, OM926LA Repair Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Mercedes-Benz OM906LA Mercedes-Benz OM926LA

Table of contents

Introduction

General Information

Validity of manual

Handling the manual

Texts and figures

Document structure based on the assembly structure

Search and find

Directions

Abbreviations

Technical terms

General repair instructions

Technical specifications

Information on proper repairs

Self-locking bolts

Liquid locking compound

Steel roller chains

Tensioning

Chain connector

Taper ring fasteners

Dismounting

Installation

Gib head key joints

Dismounting

Installation

Lock collar bearing

Dismounting

Installation

Adapter sleeve bearings

Dismounting

Chuck bushing

Installation

Dismounting

Installation

Circlips

Ferrule fittings

Screwing in

Non-tight ferrule connection

Sealing cone fittings

Hydraulic hoses

Hose placement

Treatment of sealing faces

Spare parts

Torque settings

Tightening torques for metric standard threads

Tightening torques for metric fine thread screws

Tightening torques for hydraulic screw fittings and air conditioner screw fittings with sealing cone and O-ring according to DIN 3865

Tightening torques for hydraulic screw fittings with ferrule according to DIN 3861

Tightening torques for SDS hydraulic male connectors

Tightening torques for hydraulic swivel fittings

Tightening torques for hollow screws DIN 7643

Tightening torques for direction-adjustable SDE hydraulic male connectors

Tightening torques for brake line screw fittings

Tightening torques for worm drive hose clamps

Tightening torque for spring-loaded worm drive hose clamps

CCN explanation

CCN (CLAAS Component Number)

General

Electric systems standard

Hydraulic system standard

CCN (CLAAS Component Number)

Safety

General Information

Of special importance

Identification of warning and danger signs

Regulations for avoiding accidents with personal injuries

General

Testing, adjusting and repair work

Engine operation

Suspended loads

Working on piping and hoses

Work on the Common Rail System

Working on the electric system

Working on the hydraulic system

Electric welding