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Page 1 (24)

List of Service Letters

SL No.

Title

Keywords/Remarks

SL68-1

Serrated Couplings for Camshafts

camshaft, coupling,

serrated, tightening

SL68-4

Exhaust Valves

exhaust, valve, burning,

Stellite, atomizer, fuel

nozzle, adjustment

SL68-5

VTF, VTBF and VT2BF Engines

Relative Movement between Cooling Jacket

and Scavenge Air Box

relative movement,

cooling jacket,

scavenge air box,

tightening, scavenge fire

SL69-7

Woodward Governor

Damage to Taper Pins

Woodward, governor,

damage

SL69-9

Thrust Bearings

crankcase, explosion,

sludge, modification,

alarm, high temperature

SL69-11

Chain Drive with Guideways

in the Engine Type 84VT2BF-180

8-cylinder, varying

torque, tightening force

SL69-12

DE 50-62-74-84 VT2B and all K-engines

Adjustment and Mounting of Piston Rod

Stuffing Boxes with Heco-Rings

adaptation, HECO,

stuffing box, piston rod

SL69-13

DE K98FF, K84EF, K74EF, K62EF

84VT2BF-180, 74VT2BF-160, 62VT2BF-140

Instruction for Tightening

Slit Filters and High-Pressure Pipes

fuel system, filters, high-

pressure, pipes

SL70-14

S45HU

Starting Air Distributor

loose, cam, modification

SL70-15

S45H

U45H

Exhaust Valves

dismantling, coke,

clearance

SL70-16

Water Washing of Turbochargers

turbine, compressor,

unbalance

SL70-18

DE -84VT2BF-180, -74VT2BF-160

Elastic Bracing Screw for Staybolt

fracture, relative

movement

Page 2 (24)

List of Service Letters

SL No.

Title

Keywords/Remarks

SL70-20

S45H – U45H

Clearance Absorber for Exhaust Valves

thermal expansion,

valve gear

SL71-21

Tools for Drawing of Pistons

Engine Types 84VT2BF-180, K84EF

74VTF-140, 74VTF-160, 74VTBF-160

74VT2BF-160, K74EF, 62VTBF-115, 62VTBF-140

K62EF, 50VTBF-110, 50VT2BF-110

threaded holes, cracks,

ring groove, piston

pulling, piston

overhauling

SL71-22

Repair of a Slipped Crankshaft

Main Engines

shrink mark, web,

repositioning

SL71-23

Scraper Rings for S45H and U45H

cylinder lube oil,

consumption, piston ring

SL71-25

VTF, VTBF and VT2BF Engines

Relative Movements between Cooling Jacket

and Scavenge Air Box

Addition to SL68-5

repair, shims, Loctite,

top bracing

SL71-26

Deaeration of Fresh Water System

cooling, water

SL71-27

Holding-down Bolts, Supporting Chocks

and Side- and Endchocks with Bolts

spherical, washer,

tightening

SL72-28

Deaeration of Fresh Water System

cooling, water

SL72-29

Introduction of Increased Scavenging Port

Height when Cylinder Liners are to be replaced

DE 84VT2BF-180, 74VT2BF-160

62VT2BF-140 and 42VT2BF-90

6-9-12 Cylinder Engines only

fouling, cylinder, wear,

scavenge port

SL72-30

Piston Ring Details for 2-cycle Engines

gap, chamfer

SL72-37

Starting Air Valve Bushings in Cylinder Covers

for K84EF, K74EF, K62EF and K42EF Engines

crack

Page 3 (24)

List of Service Letters

SL No.

Title

Keywords/Remarks

SL72-38

DE 45H

Shut Down Function

black-out, safety system

SL72-40

DE 45H

Exhaust Valve Spindles

flame shield, remove

SL73-42

DE 62V-74V-84V

B&W Turbochargers

TL540, TL680, TL540H and TL680H

Mounting Clearances

rotor, compressor

SL73-46

Turbocharger T1080F

Studs for fastening nozzle ring

over-tightening

SL73-47

Cylinder Cover Sealing Ring

K84EF, K74EF, K62EF

84VT2BF-180, 74VT2BF-160, 62VT2BF-140

coating, dimensions

SL73-48

DE: All Turbocharged Engine Types

Protecting Grid for Turbocharger

laminated, solid

SL73-50

Water Washing of Turbochargers

in Two-Stroke Engines, 5 and 10-Cylinder Plants

corrosion, quantity

SL73-52

Two-Stroke Diesel Engines

Running at Partial Load

continuous running, fuel

nozzle, power

SL74-53

S45H, U45H

Grinding of Exhaust Valve Seats

centring, grinding, tool

SL74-54

DE K74EF

Cylinder Liners

cracks, horizontal, stop

block, modifications

SL74-55

K74EF

Cylinder Covers

cracks, exchange,

cooling, water

SL74-56

Grinding Tool for Fuel Valve Seats

K98GF, K84EF, K74EF, K62EF, K42EF

84VT2BF-180, 74VT2BF-160, 62VT2BF-140,

50VT2BF-110

sticking, overhaul

Page 4 (24)

List of Service Letters

SL No.

Title

Keywords/Remarks

SL74-58

Condensation in Scavenging Air System

DE: K-type and VT2BF

corrosion, wear, liner,

piston ring, cooler,

scavenge air

SL74-59

Manoeuvring System – Linkage for Stop Cylinder

DE: K98FF, K84EF, K74EF and K62EF

seized, lubrication

SL74-60

DM K98FF, K84EF, K74EF, K62EF

Change-over valve normal running –

manual emergency running

SL75-63

Condensation in Scavenging Air System

DE: K-type and VT2B types

corrosion, wear, liner,

piston ring, cooler,

scavenge air

SL75-64

DE 45H

Exhaust Valve Spindle Guides

contact, overhaul

SL75-65

B&W Turbochargers for K-E and K-F Engines

Venting Screws in top of sight glass

lube oil, fouling

SL75-66

All Engine Types

Laying up of Vessels

protection, corrosion

SL75-72

DE K84EF, K74EF, K62EF

Cylinder Liners

cracks, horizontal, stop

block, modifications

SL75-74

DE K90GF, K80GF and K67GF

Cylinder Cover Studs and

Exhaust Valve Studs

tightening, leakage,

hydraulic, pressure

SL76-78

Two Stroke Diesel Engines

Running at Partial Load

continuous running, fuel

nozzle, power

SL76-82

Connecting Rod Bolts

DE 45H and S/U50H

fretting, guide piece

SL76-86

K98FF-GF

Reversing Mechanism

screw, inspection, loose

SL77-92

Aut. Stop Piston Valve for Starting Air

DE K98FF, K98GF, K90GF, K84EF

K74EF, K62EF

slow turning, adjustment

Page 5 (24)

List of Service Letters

SL No.

Title

Keywords/Remarks

SL77-93

Cylinder Cover Studs

DE S/U50HL

gas, leakage, insulation

SL77-94

Bracing Screws for Staybolt

at Chain Wheel Frame

DE K90GF, K80GF and K67GF

breakage, repair

SL77-96

Foreign Bodies in Governor Oil System

Woodward Governor Type PGA

DE K67GF, K80GF, K90GF and L67GF

obstruction

SL77-97

Checking and Maintenance Programme

DE 45H and 50H/L

overhaul, instructions

SL77-98

Lubrication of Roller Bearing in Chain Wheel

for Reversing Mechanism

K90GF, L-K80GF, L-K67GF and L55GF

interval, grease,

replenishment

SL77-99

DE K84, K74EF and K62EF

Cylinder Liners

cracks, deposits,

clearance, cover

SL77-101 K90GF, K80GF, K67GF, K45GF

Inspection and Replacement of Roller Bearings

in Roller Guides for Fuel Pumps/Exhaust Valves

lifetime, inspection

SL77-117 Fuel Oil Cleaning Procedure

Separator, Filter and Homogenizer

particles, omission,

operating particles,

operating

SL78-126 Inspection and Overhaul of

Fuel Valves, DE K-GF

testing, atomisation,

spindle guide

SL78-132 Clearance between Piston Top and Piston Skirt

Diesel Engines S/U45H and S/U50H/L

reduction, thermal

expansion

SL78-133 Rubber Ring Sealings in Pistons

O-ring, leakage,

Belleville, deflection

SL78-134 Zinc Anodes in Turbochargers

corrosion, inhibitors,

cooling, water

SL78-135 Hydraulic Rings, Nuts and Jacks

All Engine Types

sealing, hydraulic, oil

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