Komatsu WB142-5 Install guide

June 2010 Copyright 2010 Komatsu
Printed in USA DataKom Publishing Division
00-1d
CEBM018903
SHOP
MANUAL
WB142-5
BACKHOE LOADER
This material is proprietary to Komatsu America Corp. and is not to be reproduced, used, or disclosed except in accordance
with written authorization from Komatsu America Corp.
It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to make changes or
add improvements at any time without incurring any obligation to install such changes on products sold previously.
Due to this continuous program of research and development, periodic revisions may be made to this publication. It is
recommended that customers contact their distributor for information on the latest revision.
SERIAL NUMBERS WB142-5 A13001 and UP
ENGINE 4D102LE-2

FOREWORD CONTENTS
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CONTENTS 00
00 FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-1
01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD . . . . . . . . . . . . . . . . . . . . 10-1
20 STANDARD VALUE TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-1
30 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-1
40 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-1
50 DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-1
90 OTHER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1
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FOREWORD
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FOREWORD
00-2-6 dWB142-5
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FOREWORD SAFETY
WB142-5 00-3 d
12
SAFETY 00
SAFETY NOTICE 00
GENERAL PRECAUTIONS 00
Mistakes in operation are extremely costly and dangerous.
Read the OPERATION & MAINTENANCE MANUAL
carefully BEFORE operating the machine.
1. Before carrying out any greasing or repairs, read all the
precautions given on the decals attached to the machine.
2. When carrying out any operation, always wear proper
safety equipment specified for the operation you are
performing. Do not wear loose fitting work clothes, or
clothes with buttons missing.
•Always wear safety glasses when striking parts
with a hammer.
•Always wear safety glasses when grinding parts
with a grinder, etc.
3. If welding repairs are needed, always have a trained,
experienced welder carry out the work. When carrying
out welding operations, always wear welding gloves,
apron, glasses, cap and other clothes suited for welding
work.
4. When carrying out any operation with two or more
workers, always agree on the operating procedure
before starting. Always inform your fellow workers
before starting any step of the operation. Before starting
work, lock and tag all controls in the operator's compart-
ment.
5. Keep all tools in good condition.
6. Designate a place in the repair workshop to keep tools
and removed parts. Always keep the tools and parts in
their correct places. Always keep the work area clean
and make sure there is no dirt or oil on the floor. Smoke
only in the areas provided for smoking. Never smoke
while working.
PREPARATIONS FOR WORK 00
1. Before adding oil or making repairs, park the machine
on hard, level ground and block the wheels or tracks to
prevent the machine from moving. Lower all work
implements to the ground and remove starting key.
2. Before starting work, lower blade, ripper, bucket or any
other work equipment to the ground. If this is not possi-
ble, insert the safety pin or use blocks to prevent the
work equipment from falling. In addition, be sure to
lock all the control levers and hang warning signs on
them.
3. When disassembling or assembling, support the
machine with blocks, jacks or stands before starting
work.
4. Remove all mud and oil from the steps or other places
used to get on and off the machine. Always use the
handrails, ladders or steps when getting on or off the
machine. Never jump on or off the machine. If it is
impossible to use the handrails, ladders or steps, use a
stand to provide safe footing.
PRECAUTIONS DURING WORK 00
1. When removing the oil filler cap, drain plug or hydrau-
lic pressure measuring plugs, loosen them slowly to pre-
vent the oil from spurting out. Before disconnecting or
removing components of the oil, coolant or air circuits,
first relieve the pressure completely from the circuit.
2. The coolant and oil in the systems are hot when the
engine is stopped, so be careful not to get burned. Wait
for the oil and coolant to cool before carrying out any
work on the oil or coolant systems.
IMPORTANT SAFETY NOTICE 00
Proper service and repair is extremely important for the safe operation of your machine. The service and repair procedures
recommended and described in this manual are both effective and safe methods of operation. Some of these operations
require the use of tools specially designed for the procedure.
To prevent injury to workers, the symbol is used to mark safety precautions in this manual. The cautions accompanying
this symbol should always be followed carefully. If any dangerous situation arises or may possibly arise, first consider safety,
and take the necessary actions to deal with the situation.
WARNING! Never modify, weld, cut, or drill
on any part of a ROPS
structure. Doing so may
weaken the structure which
could lead to possible failure in
a rollover situation
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FOREWORD SAFETY
00-4 dWB142-5
3. Before starting work, remove the leads from the battery. ALWAYS remove the lead from the negative (-) terminal first.
4. When raising heavy components, use a hoist or crane. Check that the wire rope, chains and hooks are free from damage.
Always use lifting equipment which has ample capacity. Install the lifting equipment at the correct places. Use a hoist or
crane and operate slowly to prevent the component from hitting anything. Do not work with any part while it is still raised
by the hoist or crane.
5. When removing covers which are under internal pressure or under pressure from a spring, always leave two bolts in posi-
tion on opposite sides. Slowly release the pressure, then slowly loosen the bolts to remove.
6. When removing components, be careful not to break or damage the wiring. Damaged wiring may cause electrical fires.
7. When removing piping, stop the fuel or oil from spilling out. If any fuel or oil drips on to the floor, wipe it up immediately.
Fuel or oil on the floor can cause you to slip, or even start fires.
8. Never use flammable liquids to clean parts. Always use approved non-flammable solvents to clean parts.
9. Be sure to assemble all parts in their original locations. Replace any damaged part with new parts.
•When installing hoses and wires, be sure that they will not be damaged by contact with other parts when the machine
is being operated.
10. When installing high pressure hoses, be sure that they are not twisted. Damaged tubing is dangerous. Be extremely careful
when installing tubes for high pressure circuits. Also make sure parts are correctly installed.
11. When assembling or installing parts, always use the specified tightening torques and sequences. When installing protec-
tive parts such as guards, or parts that may vibrate or rotate at high speeds, be particularly careful to check their installa-
tion carefully.
12. When aligning two holes, never insert your fingers or hand. Use appropriate tools to align parts.
13. When measuring hydraulic pressure, be sure the measuring tool is correctly assembled before taking any measurements.
14. Take care when removing or installing the tracks on track-type machines. When removing the track, the track separates
suddenly. Never let anyone stand at either end of the track.
15. When making repairs or adjustments on electronically-controlled engines, avoid any physical contact with the injection
system’s wiring harness while the engine is running. Due to the high voltage and amperage in this system, serious injury
may occur.
16. Never use a welder or machine with a higher voltage to jump-start or supply voltage to a machine with a lower voltage
system. Damage to the machine’s electrical system, a fire or an explosion may result. Always stay within the same voltage
range as the machine.
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FOREWORD GENERAL
WB142-5 00-5 d
12
GENERAL 00
This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate under-
standing of the product and by showing him the correct way to perform repairs and make judgements. Make sure you under-
stand the contents of this manual and use it to full effect at every opportunity.
This shop manual mainly contains the necessary technical information for operations performed in a service workshop. For
ease of understanding, the manual is divided into the following sections. These sections are further divided into each main
group of components.
GENERAL
This section lists the general machine dimensions, performance specifications, component weights, and fuel, coolant and
lubricant specification charts.
STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
This section explains the structure and function of each component. It serves not only to give an understanding of the
structure, but also serves as reference material for troubleshooting. In addition, this section gives the judgement standards
when inspecting disassembled parts.
STANDARD VALUE TABLES
This section explains the standard values for new machine and judgement criteria for testing, adjusting and
troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts
in troubleshooting.
TESTING AND ADJUSTING
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at
completion of the checks and repairs.
TROUBLESHOOTING
Troubleshooting charts correlating “Problems” to “Causes” are also included in this section.
DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component,
as well as precautions to be taken for these operations.
OTHER
This section has the foldout drawings for the machine.
NOTICE
The specifications contained in this shop manual are subject to change at any time and without any advance notice. Contact
your distributor for the latest information.

FOREWORD HOW TO READ THE SHOP MANUAL
00-6 dWB142-5
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HOW TO READ THE SHOP MANUAL 00
VOLUMES 00
Shop manuals are issued as a guide to carrying out repairs.
They are divided as follows:
Chassis volume: Issued for every machine model
Engine volume: Issued for each engine series
Electrical volume: Each issued as one to cover all models
Attachment volume: Each issued as one to cover all models
These various volumes are designed to avoid duplication of
information. Therefore to deal with all repairs for any model,
it is necessary that chassis, engine, electrical and attachment
be available.
DISTRIBUTION AND UPDATING 00
Any additions, amendments or other changes will be sent to
your distributors. Get the most up-to-date information before
you start any work.
FILING METHOD 00
1. See the page number on the bottom of the page. File the
pages in correct order.
2. Following examples show how to read the page number:
Example:
10 - 3
Section number (10 is Structure, Function and
Maintenance Standard)
Consecutive page number for each item
3. Additional pages: Additional pages are indicated by a
hyphen (-) and numbered after the page number. File as
in the example.
Example:
REVISED EDITION MARK 00
When a manual is revised, an edition mark (b, c, d, etc.) is
recorded on the bottom outside corner of the pages.
REVISIONS 00
Revised pages are shown on the LIST OF REVISED PAGES
between the TITLE PAGE and SAFETY page.
SYMBOLS 00
So that the shop manual can be of ample practical use,
important places for safety and quality are marked with the
following symbols.
10-4
10-4-1 Added pages
10-4-2
10-5
Symbol Item Remarks
Safety Special safety precautions are necessary when performing the
work.
★Caution
Special technical precautions or
other precautions for preserving
standards are necessary when per-
forming the work.
Weight
Weight of parts or systems.
Caution necessary when selecting
hoisting wire or when working
posture is important, etc.
Tightening
torque
Places that require special atten-
tion for tightening torque during
assembly.
Coat Places to be coated with adhesives
and lubricants etc.
Oil, water Places where oil, water or fuel
must be added, and the capacity.
Drain Places where oil or water must be drained, and quantity to be
drained.

FOREWORD HOISTING INSTRUCTIONS
WB142-5 00-7 d
12
HOISTING INSTRUCTIONS 00
HOISTING 00
●If a part cannot be smoothly removed from the machine
by hoisting, the following checks should be made:
1. Check for removal of all bolts fastening the part to the
relative parts.
2. Check for existence of another part causing interference
with the part to be removed.
WIRE ROPES 00
1. Use adequate ropes depending on the weight of parts to
be hoisted, referring to the table below:
★The allowable load value is estimated to be 1/6 or 1/7 of
the breaking strength of the rope used.
2. Sling wire ropes from the middle portion of the hook.
Slinging near the edge of the hook may cause the rope to
slip off the hook during hoisting, and a serious accident
can result. Hooks have maximum strength at the middle
portion.
3. Do not sling a heavy load with one rope alone, but sling
with two or more ropes symmetrically wound on to the
load.
4. Do not sling a heavy load with ropes forming a wide
hanging angle from the hook. When hoisting a load with
two or more ropes, the force subjected to each rope will
increase with the hanging angles. The table below
shows the variation of allowable load when hoisting
with two ropes, each of which is allowed to sling up to
1000 kg (2205 lb) vertically, at various hanging angles.
When two ropes sling a load vertically, up to 2000 kg
(4409 lb) of total weight can be suspended. This weight
becomes 1000 kg when two ropes make a 120° hanging
angle. On the other hand, two ropes are subject to an
excessive force as large as 4000 kg (8818 lb) if they
sling a 2000 kg (4409 lb) load at a lifting angle of 150°.
WARNING! Heavy parts (25 kg (55 lb) or
more) must be lifted with a
hoist, crane, etc. Every part
weighing 25 kg (55 lb) or
more is indicated clearly with
this symbol.
Wire ropes
(Standard “Z” or “S” twist ropes without galvanizing)
Rope diameter Allowable load
mm (in) kN tons
10 (0.39) 9.8 1.0
11.2 (0.44) 13.7 1.4
12.5 (0.49) 15.7 1.6
14 (0.55) 21.6 2.2
16 (0.63) 27.5 2.8
18 (0.71) 35.3 3.6
20 (0.79) 43.1 4.4
22.4 (0.88) 54.9 5.6
30 (1.18) 98.1 10.0
40 (1.57) 176.5 18.0
50 (1.97) 274.6 28.0
60 (2.36) 392.2 40.0
WARNING! Slinging with one rope may
cause turning of the load during
hoisting, untwisting of the rope,
or slipping of the rope from its
original winding position on the
load, which can result in a dan-
gerous accident.

FOREWORD EXPLANATION OF TERMS FOR MAINTENANCE STANDARD
00-8 dWB142-5
EXPLANATION OF TERMS FOR MAINTENANCE STANDARD 00
The maintenance standard values necessary for judgment of products and parts are described by the following terms.
1. Standard size and tolerance
•To be accurate, the finishing size of parts is a little differ-
ent from one to another.
•To specify a finishing size of a part, a temporary stan-
dard size is set and an allowable difference from that size
is indicated.
•The above size set temporarily is called the "standard
size" and the range of difference from the standard size
is called the "tolerance."
•The tolerance with the symbols of + or – is indicated on
the right side of the standard size.
Example:
★The tolerance may be indicated in the text and a table as
[standard size (upper limit of tolerance/lower limit of toler-
ance)].
Example: 120 (–0.022/–0.126)
●Usually, the size of a hole and the size of the shaft to be fitted
to that hole are indicated by the same standard size and
different tolerances of the hole and shaft. The tightness of fit
is decided by the tolerance.
●Indication of size of rotating shaft and hole and relationship drawing of them
2. Standard clearance and standard value
•The clearance made when new parts are assembled is called the "standard clearance," which is indicated by the range
from the minimum clearance to the maximum clearance.
•When some parts are repaired, the clearance is generally adjusted to the standard clearance.
•A value of performance and function of new products or equivalent is called the "standard value," which is indicated
by a range or a target value.
•When some parts are repaired, the value of performance/function is set to the standard value.
3. Standard interference
•When the size of a hole is smaller than the size of a shaft because of the standard size and tolerance, the difference
between these sizes is called the "interference."
•The range (A – B) from the difference (A) between the minimum size of the shaft and the maximum size of the hole
to the difference (B) between the maximum size of the shaft and the minimum size of the hole is the "standard inter-
ference."
Standard size Tolerance
120 -0.022
-0.126
Standard size Tolerance
60 Shaft Hole
-0.030
-0.076 +0.046 0

FOREWORD EXPLANATION OF TERMS FOR MAINTENANCE STANDARD
WB142-5 00-9 d
•After repairing or replacing some parts, measure the size of their hole and shaft and check that the interference is in
the standard range.
4. Repair limit and allowable value
•The size of a part changes because of wear and deformation while it is used. The limit of changed size is called the
"repair limit."
•If a part is worn to the repair limit must be replaced or repaired.
•The performance and function of a product lowers while it is used. A value below which the product can be used
without causing a problem is called the "allowable value."
•If a product is worn to the allowable value, it must be checked or repaired. The permissible value is estimated from
various tests or experiences in most cases, however, it must be judged after considering the operating condition and
customer's requirement.
5. Clearance limit
•Parts can be used until the clearance between them is increased to a certain limit. The limit at which those parts
cannot be used is called the "clearance limit."
•If the clearance between the parts exceeds the clearance limit, they must be replaced or repaired.
6. Interference limit
•The allowable maximum interference between the hole of a part and the shaft of another part to be assembled is called
the "interference limit."
•The interference limit shows the repair limit of the part of smaller tolerance.
•If the interference between the parts exceeds the interference limit, they must be replaced or repaired.

FOREWORD COATING MATERIALS
00-10 dWB142-5
12
COATING MATERIALS 00
★The recommended coating materials prescribed in the shop manuals are listed below.
Category Code Part No. Quantity Container Main applications, features
Adhesives
LT-1A 790-129-9030 150 g Tube ●Used to prevent rubber gaskets, rubber
cushions and cork plugs from coming out.
LT-1B 790-129-9050 20 g
(2 pcs.) Polyethylene container
●Used in places requiring an immediately
effective, strong adhesive.
●Used for plastics (except polyethylene,
polypropylene, tetrafluoroethylene, and
vinyl chloride), rubber, metal and non-
metal.
LT-2 09940-00030 50 g Polyethylene
container
●Features: Resistance to heat, chemicals
●Used for anti-loosening and sealant
purposes for bolts and plugs.
LT-3
790-129-9060
(Set of adhesive
and hardening
agent)
Adhesive:
1 kg
Hardening
agent:
500 g
Can ●Used as adhesive or sealant for metal, glass
or plastic.
LT-4 790-129-9040 250 g Polyethylene
container ●Used as sealant for machined holes.
Holtz
MH 705 790-126-9120 75 g Tube ●Used as heat-resisting sealant for repairing
engine.
Three
bond
1735 179-129-9140 2 g Polyethylene
container
●Quick hardening type adhesive
●Cure time: within five seconds to three min-
utes
●Used mainly for adhesion of metals,
rubbers, plastics and woods.
Aron-
alpha
201 790-129-9130 50 g Polyethylene
container
●Quick hardening type adhesive
●Quick cure type (maximum strength after
30 minutes)
●Used mainly for adhesion of rubbers,
plastics and metals.
Loctite
648-50 79A-129-9110 50 cc Polyethylene container
●Features: Resistance to heat, chemicals
●Used at joint portions subject to high tem-
perature.
Gasket seal-
ant
LG-1 790-129-9010 200 g Tube ●Used as adhesive or sealant for gaskets and
packing of power train case, etc.
LG-3 790-129-9070 1 kg Can
●Features: Resistance to heat
●Used as sealant for flange surfaces and bolts
at high temperature locations; used to
prevent seizure.
●Used as sealant for heat resistant gasket for
high temperature locations such as engine
pre-combustion chamber, exhaust pipe.

FOREWORD COATING MATERIALS
WB142-5 00-11 d
Gasket seal-
ant
LG-4 790-129-9020 200 g Tube
●Features: Resistance to water, oil
●Used as sealant for flange surface, thread.
●Also possible to use as sealant for flanges
with large clearance.
●Used as sealant for mating surfaces of final
drive case, transmission case.
LG-5 790-129-9080 1 kg Polyethylene
container
●Used as sealant for various threads, pipe
joints, flanges.
●Used as sealant for tapered plugs, elbows,
nipples of hydraulic piping.
LG-6 09940-00011 250 g Tube
●Features: Silicon based, resistant to heat,
cold
●Used as sealant for flange surface, thread.
●Used as sealant for oil pan, final drive case,
etc.
LG-7 09920-00150 150 g Tube
●Features: Silicon based, quick hardening
type
●Used as sealant for flywheel housing, intake
manifold, oil pan, thermostat housing, etc.
Three
bond
1211 790-129-9090 100 g Tube ●Used as heat-resisting sealant for repairing
engines.
Molybdenum
disulphide
lubricant
LM-G 09940-00051 60 g Can ●Used as lubricant for sliding parts (to
prevent squeaking).
LM-P 09940-00040 200 g Tube
●Used to prevent seizure or scuffing of the
thread when press fitting or shrink fitting.
●Used as lubricant for linkage, bearings, etc.
Grease
G2-LI
SYG2-400LI
SYG2-350LI
SYG2-400LI-A
SYG2-160LI
SYGA160CNLI
Various Various ●General purpose type
G2-CA
SYG2-400CA
SYG2-350CA
SYG2-400CA-A
SYG2-160CA
SYG2-
160CNCA
Various Various ●Used for normal temperature, light load
bearing at places in contact with water or
steam.
Molybdenum disulphide lubricant
SYG2-400M 400 g (10 per
case) Belows type ●Used for places with heavy load.
Category Code Part No. Quantity Container Main applications, features

FOREWORD STANDARD TIGHTENING TORQUE
00-12 dWB142-5
12
STANDARD TIGHTENING TORQUE 00
STANDARD TIGHTENING TORQUE OF BOLTS AND NUTS 00
The following charts give the standard tightening torques of bolts and nuts. Exceptions are given in DISASSEMBLY AND
ASSEMBLY.
Thread diameter of bolt Width across flats
mm mm N·m lbf ft
6 10 13.2 ±1.4 9.7 ±1.0
8 13 31.4 ±2.9 23.2 ±2.1
10 17 65.7 ±6.8 48.5 ±5.0
12 19 112 ±9.8 82.6 ±7.2
14 22 177 ±19 130.5 ±14.0
16 24 279 ±29 205.8 ±23.4
18 27 383 ±39 282.5 ±28.8
20 30 549 ±58 404.9 ±42.8
22 32 745 ±78 549.5 ±57.5
24 36 927 ±98 683.7 ±72.3
27 41 1320 ±140 973.6 ±103.2
30 46 1720 ±190 1268.6 ±140.1
33 50 2210 ±240 1630.0 ±177.0
36 55 2750 ±290 2028.3 ±213.9
39 60 3280 ±340 2419.2 ±250.8
Thread diameter of bolt Width across flats
mm mm N·m lbf ft
6 10 7.85 ±1.95 5.75 ±1.4
8 13 18.6 ±4.9 13.7 ±3.6
10 14 40.2 ±5.9 29.6 ±4.4
12 27 82.35 ±7.85 60.7 ±5.8

FOREWORD STANDARD TIGHTENING TORQUE
WB142-5 00-13 d
12
TIGHTENING TORQUE OF HOSE NUTS 00
Use these torques for hose nuts.
TIGHTENING TORQUE OF SPLIT FLANGE BOLTS 00
Use these torques for split flange bolts.
TIGHTENING TORQUE FOR FLARED NUTS 00
Use these torques for flared part of nut.
Nominal No. Thread diameter Width across flats Tightening torque
mm mm N·m lbf ft
02 14 19 24.5 ±4.9 18.1 ±3.6
03 18 24 49 ±19.6 36.1 ±14.4
04 22 27 78.5 ±19.6 57.9 ±14.4
05 24 32 137.3 ±29.4 101.3 ±21.7
06 30 36 176.5 ±29.4 130.2 ±21.7
10 33 41 196.1 ±49 144.6 ±36.1
12 36 46 245.2 ±49 180.9 ±36.1
14 42 55 294.2 ±49 217.0 ±36.1
Thread diameter Width across flats Tightening torque
mm mm N·m lbf ft
10 14 65.7 ±6.8 48.5 ±5.0
12 17 112 ±9.8 82.6 ±7.2
16 22 279 ±29 205.8 ±21.4
Thread diameter Width across flats Tightening torque
mm mm N·m lbf ft
14 19 24.5 ±4.9 18.0 ±3.6
18 24 49 ±19.6 36.1 ±14.5
22 27 78.5 ±19.6 57.9 ±14.5
24 32 137.3 ±29.4 101.3 ±21.7
30 36 176.5 ±29.4 130.2 ±21.7
33 41 196.1 ±49 144.6 ±36.1
36 46 245.2 ±49 180.9 ±36.1
42 55 294.2 ±49 217.0 ±36.1

FOREWORD STANDARD TIGHTENING TORQUE
00-14 dWB142-5
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PIPING JOINTS 00
★Unless there are special instructions, tighten the O-ring boss piping joints to the torque below.
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PLUGS 00
★Unless there are special instructions, tighten the O-ring boss plugs to the torque below.
TIGHTENING TORQUE TABLE FOR HOSES (TAPER SEAL TYPE AND FACE
SEAL TYPE) 00
★Tighten the hoses (taper seal type and face seal type) to the following torque, unless otherwise specified.
★Apply the following torque when the threads are coated (wet) with engine oil.
Nominal No. Thread diameter Width across flat Tightening torque (Nm {lbf ft})
mm mm Range Target
02 14
Varies depending on
type of connector.
35 - 63 {25.81 - 46.46} 44 {32.45}
03, 04 20 84 - 132 {61.95 - 97.35} 103 {75.96}
05, 06 24 128 - 186 {94.40 - 137.18} 157 {115.79}
10, 12 33 363 - 480 {267.73 - 354.02} 422 {311.25}
14 42 746 - 1010 {550.22 - 744.93} 883 {651.26}
Nominal No. Thread diameter Width across flat Tightening torque (Nm {lbf lb})
mm mm Range Target
08 08 14 5.88 - 8.82 {4.33 - 6.50} 7.35 {5.42}
10 10 17 9.8 - 12.74 {7.22 - 9.39} 11.27 {8.31}
12 12 19 14.7 - 19.6 {10.84 - 14.45} 17.64 {13.01}
14 14 22 19.6 - 24.5 {14.45 - 18.07} 22.54 {16.62}
16 16 24 24.5 - 34.3 {18.07 - 25.29} 29.4 {21.68}
18 18 27 34.3 - 44.1 {25.29 - 32.52} 39.2 {28.91}
20 20 30 44.1 - 53.9 {32.52 - 39.75} 49.0 {36.14}
24 24 32 58.8 - 78.4 {43.36 - 57.82} 68.6 {50.59}
30 30 32 93.1 - 122.5 {68.66 - 90.35} 107.8 {79.50}
33 33 - 107.8 - 147.0 {79.50 - 108.42} 124.4 {91.75}
36 36 36 127.4 - 176.4 {93.96 - 130.10} 151.9 {112.03}
42 42 - 181.3 - 240.1 {133.72 - 177.08} 210.7 {155.40}
52 52 - 274.4 - 367.5 {202.38 - 271.05} 323.4 {238.52}
Nominal
size of hose Width across flats
Tightening torque (Nm {lbf ft}) Taper seal
type Face seal type
Range Target Thread size
(mm)
Nominal thread
size - Threads per
inch, Thread series
Root diameter (mm)
(Reference)
02 19 34 - 54 {25.0 - 39.8} 44 {32.4} -9/16 - 18UN 14.3
34 - 63 {25.0 - 46.4} 44 {32.4} 14 - -
03 22 54 - 93 {39.8 - 68.5} 74 {54.5} -11/16 -16UN 17.5
24 59 - 98 {43.5 - 72.2} 78 57.5} 18 - -
04 27 84 - 132 {61.9 - 97.3} 103 {75.9} 22 13/16 - 16UN 20.6
05 32 128 - 186 {94.4 - 137.1} 157 {115.7} 24 1 - 14UNS 25.4
06 36 177 - 245 {130.5 - 180.7} 216 {159.3} 30 1 3/16 - 12UN 30.2
(10) 41 177 - 245 {130.5 - 180.7} 216 {159.3} 33 - -
(12) 46 197 - 294 {145.3 - 216.8} 245 {180.7} 36 - -
(14) 55 246 - 343 {181.4 - 252.9} 294 {216.8} 42 - -