PDF Operator & Maintenance Manual Komatsu PC130-7 Hydraulic Excavator - 1 MB
Unlock the full potential of your Komatsu PC130-7 hydraulic excavator with this detailed operation and maintenance manual.
Designed for models with serial numbers 72642 and up, this guide covers everything from startup procedures to scheduled servicing.
Following the manufacturer's recommendations is the best way to ensure safety, reliability, and a long service life for your machine.
This manual is an indispensable tool for operators and maintenance staff.
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Operation & UEAM003604
Maintenance Manual
PC130-7
HYDRAULIC EXCAVATOR
SERIAL NUMBER PC130-7 - 72642 and up
WARNING
Unsafe use of this machine may cause serious injury or
death. Operators and maintenance personnel must read
this manual before operating or maintaining this
machine. This manual should be kept inside the cab for
reference and periodically reviewed by all personel who
will come into contact with the machine.
--- Page 3 ---
FOREWORD PRODUCT INFORMATION
SERVICE METER LOCATION 1
On top of the machine monitor
YOUR MACHINE SERIAL NUMBERS AND DISTRIBUTOR 1
Machine serial No.
Engine serial No.
Product Identification Number
Manufacturers name: KOMATSU UK Ltd.
Address: Durham Road
Birtley
Chester-Le street
County Durham DH32QX
United Kingdom
Distributor
Address
Phone
Service personnel for your
machine:
1-9
--- Page 4 ---
CONTENTS
TRANSPORT & STORAGE OF SUPER LONG FRONT MACHINE ........................................................ 6-44
INSTALLATION OF SUPPORTING LINK ....................................................................................... 6-44
TRANSPORTATION OF SUPER LONG FRONT MACHINE ................................................................... 6-44
WORKING RANGE OF SUPER LONG FRONT....................................................................................... 6-45
LIFTING CAPACITY PC130 SUPER LONG FRONT ............................................................................... 6-46
MAINTENANCE........................................................................................................................................ 6-47
SPECIAL SERVICE REQUIREMENTS FOR SUPER LONG FRONT WORK EQUIPMENT.......... 6-47
LUBRICATING.......................................................................................................................................... 6-47
INDEX
COLOPHON
1-19
--- Page 5 ---
SAFETY SAFETY LABELS
(5) Precautions when adjusting track tension (09657-A0881)
q Sign indicates a hazard of flying plug from track adjuster
that could cause injury.
q Read manual and adjusting track for safe and proper han-
dling.
(6) Precautions when handling cable (203-00-71130)
q Sign indicates an electric hazard from handling the cable.
q Read manual for safe and proper handling.
(7) Stopping rotation for inspection and maintenance
(09667-A0481)
q Sign indicates a hazard of rotating parts, such as belt.
q Turn off before inspection and maintenance.
2-9
--- Page 6 ---
SAFETY SAFETY INFORMATION
No attempt should be made to repair these parts as this may have an adverse effect on component strength or
durability.
If such a repair is undertaken without authorisation from Komatsu there is a danger that a problem might occur that
will lead to serious personal injury.
If in doubt please contact your Komatsu distributor.
Komatsu can not take any responsibility for accidents, failures or damage caused by unauthorized repair to the
above mentioned components.
ATTACHMENT INSTALLATION
q When installing optional parts or attachments, there may be problems with safety or legal restrictions. There-
fore contact your Komatsu distributor for advice.
q Any injuries, accidents, or product failures resulting from the use of unauthorized attachments or parts will not
be the responsibility of Komatsu.
q When installing and using optional attachments, read the instruction manual for the attachment, and the gen-
eral information related to attachments in this manual.
ATTACHMENT COMBINATIONS
Depending on the type or combination of work equipment, there is a hazard that the work equipment may hit the
cab or other parts of the machine. Before using unfamiliar work equipment, check if there is any hazard of interfer-
ence, and operate with caution.
CAB WINDOW GLASSES
q If the cab glass on the work equipment side is broken, there is a hazard that the work equipment may contact
the operator's body directly. Stop operation immediately and replace the glass.
q The ceiling window is made of organic glass (polycarbonate), and as such it is apt to break easily when receiv-
ing damage on the surface, thereby deteriorating its protective characteristic. If there is a crack or damage
caused by a fallen rock, or when any sign of them is noticed, replace it with a new window.
UNAUTHORIZED MODIFICATIONS
If this machine is modified without the permission from Komatsu, there is a danger that problems may occur with
safety and that this may lead to serious personal injury. Modifications may have an adverse effect on items such
as machine strength and visibility. Before making any modifications please consult your Komatsu distributor.
Komatsu cannot take any responsibility for accidents, failures or damage caused by modifications not authorized
by Komatsu.
SAFETY AT JOBSITE
Before starting operations, thoroughly check the area for any unusual conditions that could be dangerous.
q When carrying out operations near combustible materials such as thatched roofs, dry leaves or dry grass,
there is a hazard of fire, so be careful when operating.
q Check the terrain and condition of the ground at the worksite, and determine the safest method of operation.
Do not carry out operations at places where there is a hazard of landslides or falling rocks.
2-19
--- Page 7 ---
SAFETY SAFETY MACHINE OPERATION
OPERATIONS ON SLOPES
q When working on slopes, there is a hazard that the machine may lose its balance and turn over when the
swing or work equipment are operated. This may lead to serious injury or property damage, so always provide
a stable place when carrying out these operations, and operate carefully.
q Do not swing the work equipment from the uphill side to the
downhill side when the bucket is loaded. This operation is
dangerous, and may cause the machine to tip over.
q If the machine has to be used on a slope, pile the soil to
make a platform (A) that will keep the machine as horizon-
tal as possible.
PROHIBITED OPERATIONS
q Never dig the work face under an overhang. There is a
hazard that rocks may fall or that the overhang may col-
lapse and fall on top of the machine.
q Do not excavate too deeply under the front of the machine.
The ground under the machine may collapse and cause
the machine to fall.
q To make it easier to escape if there is any problem, set the
tracks at right angles to the road shoulder or cliff with the
sprocket at the rear when carrying out operations.
2-29
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SAFETY SAFETY MAINTENANCE INFORMATION
STOP ENGINE BEFORE CARRYING OUT MAINTENANCE
q Stop the machine on firm, level ground.
q Select a place where there is no hazard of falling rocks or
landslides, or of flooding if the land is low.
q Lower the work equipment completely to the ground and
stop the engine.
q Turn the starting switch to the ON position. Operate the
work equipment control lever back and forth, left and right
at the full stroke 2 to 3 times to eliminate the remaining
internal pressure in the hydraulic circuit, and then push up
safety lock lever (1) to the LOCK position (L).
q Put blocks under the track to prevent the machine from
moving.
TWO WORKERS FOR MAINTENANCE WHEN ENGINE IS RUNNING
To prevent injury, do not carry out maintenance with the engine
running. If maintenance must be carried out with the engine
running, carry out the operation with at least two workers and
do as follows.
q One worker must always sit in the operator's seat and be
ready to stop the engine at any time. All workers must
maintain contact with the other workers.
2-39
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OPERATION DETAILED CONTROLS AND GAUGES
Basic Check Monitors 3
CAUTION
These monitors DO NOT ensure that the machine is in good condition. When performing checks before
starting (daily checks), do not simply rely on the monitors. Always dismount the machine and check each
item directly.
This displays the basic items that should be checked before starting the engine.
If there is any abnormality, the appropriate monitor lamp will flash.
A (1) Engine oil temperature monitor A (2) Engine oil change monitor (only if equipped)
Engine Oil Level Monitor
This monitor (1) lights up to warn the operator that the oil level
in the engine oil pan has gone down.
If the monitor lamp flashes, check the oil level in the engine oil
pan, and add oil.
3-5
--- Page 10 ---
OPERATION DETAILED CONTROLS AND GAUGES
Auto-deceleration Switch (Selection Switch)
This switch (2) acts to activate the function that automatically
lowers the engine speed and reduces fuel consumption when
the control levers are at neutral.
Auto-deceleration lights up: Auto-deceleration is actuated
Auto-deceleration goes out: Auto-deceleration is canceled
Each time the switch is pressed, the auto-deceleration is actu-
ated or canceled.
Travel Speed Selector Switch
WARNING
q When loading on or unloading from a trailer, always travel at low speed (with the travel speed selector
switch put at the Lo position). Never operate the travel speed selector switch during the loading or
unloading operation.
q If the travel speed is switched between Hi and Lo when the machine is traveling, the machine may
deviate to one side, even when traveling in a straight line.
Stop the machine before switching the travel speed.
This switch (3) is used to switch the travel speed between two
levels (high and low).
Lo lights up: Low speed
Hi lights up: High speed
When the engine is started, the speed is automatically set to
Lo.
When traveling in Hi, if more travel power is needed, such as
on soft ground or traveling uphill, the transmission automati-
cally switches to low speed (Lo), so there is no need to operate
the switch. The monitor display stays at Hi.
Wiper Switch
This switch (4) actuates the front window wiper.
ON lights up: The wiper works continuously.
INT lights up: The wiper works intermittently.
OFF: The wiper stops.
3-15
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OPERATION DETAILED CONTROLS AND GAUGES
Work Equipment Control Lever
This Left work equipment control lever (3) is used to operate
the arm and upper structure.
Arm operation
(a) Arm OUT
(b) Arm IN
Swing operation
(c) Swing to right
(d) Swing to left
N (Neutral) : The upper structure and arm are held in position
and do not move.
This Right work equipment control lever (4) is used to operate
the boom and bucket.
Boom operation
(a) RAISE
(b) LOWER
Bucket operation
(c) DUMP
(d) CURL
N (Neutral) : The boom and bucket are held in position and do
not move.
REMARK
The engine speed for all control levers (travel, work equipment, attachment) is changed as follows by the auto-
deceleration mechanism.
q When the travel lever and work equipment control levers are at the neutral position, even if the fuel control
dial is above midrange speed, the engine speed will go down to a midrange speed. If one of these levers is
operated, the engine speed will rise to the speed set by the fuel control dial.
q If all the control levers are at the neutral position, the engine speed goes down approx. 100 rpm, then after
approx. 4 seconds, the engine speed goes down to the deceleration speed (approx. 1400 rpm).
3-25
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OPERATION DETAILED CONTROLS AND GAUGES
AIR CONDITIONER CONTROLS 3
Air Conditioner Control Panel 3
A
(1) OFF switch (6) FRESH/RECIRC selector switch
(2) Fan switch (7) Display monitor
(3) Temperature control switch (8) Air conditioner switch
(4) Vent selector switch (9) Sunlight sensor
(5) Auto switch
OFF Switch
Switch (1) is used to stop the fan and air conditioner.
q When OFF switch (1) is pressed, the set temperature and
air flow displayed on monitor (7), the lamps above auto
switch (5), and air conditioner (8) go out, and operation
stops.
REMARK
When switch (1) is turned to the OFF position, the lamp above
FRESH/RECIRC selector switch (6) does not go out, but this is
not an abnormality.
3-35
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OPERATION DETAILED CONTROLS AND GAUGES
2. Press vent selector switch (4) and set the vent display on
the display monitor (C) to the display shown in (f) or (g) in
the diagram on the right.
3. Press FRESH/RECIRC selector switch (6) and set it to
take in fresh air.
4. Press temperature setting switch (3) and set temperature
on the display (7) monitor to maximum heating.
5. Adjust vents (A), (B1), and (B2) so that the air blows onto
the window glass.
(Vents (C) and (D) are fixed and cannot be adjusted.)
A
3-45
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OPERATION DETAILED CONTROLS AND GAUGES
ACCUMULATOR 3
WARNING
The accumulator is charged with high-pressure nitrogen gas, so mistaken operation may cause an explo-
sion which will lead to serious injury or damage. When handling the accumulator, always do as follows.
The pressure in the control circuit cannot be completely removed. When removing the hydraulic equip-
ment, do not stand in the direction that the oil spurts out when carrying out the operation.
Loosen the bolts slowly.
Do not disassemble the accumulator.
Do not bring it near flame or dispose of it in fire.
Do not make holes in it or weld it.
Do not hit it, roll it, or subject it to any impact.
When disposing of the accumulator, the gas must be released. Please contact your Komatsu distributor to
have this work carried out.
This machine is equipped with an accumulator in the control circuit. The accumulator is a device to store oil pres-
sure for the control circuit, and when it is installed, the control circuit can be actuated for a short time even after the
engine is stopped. Due to this device, the work equipment lowers under its own weight, if the control lever is
moved in the lowering direction.
The accumulator is installed to the position shown in the dia-
gram on the right.
Releasing Hydraulic Pressure with Accumulator 3
1. Place the work equipment on the ground. Close the crusher attachment jaws, etc.
2. Stop the engine.
3. Turn the starting switch to the ON position.
4. Move the safety lock lever to the free position. Move the work equipment control lever and the attachment con-
trol pedal to full stroke back and forth, right and left so as to release the pressure in the control circuit.
5. Move the safety lock lever to the lock position. Lock the control lever and attachment control pedal.
6. Turn the key in starting switch to the OFF position.
3-55
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OPERATION MACHINE OPERATIONS AND CONTROLS
Pull lever (4) up to adjust the angle of the rear of the seat. (4 stages)
q To raise the angle at the rear of the seat,keep the lever (3) pulled up and stand up slightly to remove your
weight from the seat.
q To lower the angle at the rear of the seat,keep the lever (3) pulled up and apply your weight to the
Amount of tilt: Up 13°, down 13°
q Adjusting seat height
It is possible to move the seat up or down by combining adjustments forward tilt and rear tilt.
After setting the forward tilt or rear tilt to the desired height, operate the opposite part to set the seat horizontal then
secure in position.
Height adjustment: 60 mm
(D) Adjusting armrest angle
Armrest (5) can be made to spring up by hand approx. 90°.
In addition, by turning the bottom (6) of the armrest by hand it is possible to make fine vertical adjustments of the
armrest angle.
Armrest adjustment angle: 25°.
REMARK
If the seat back is tipped to the front without raising the armrest(5), the armrest will rise automatically.
(E) Overall fore-and-aft adjustment of seat
Move lever (7) to right, set to the desired position, then release the lever. In this case, the operator's seat, left and
right control levers, and safety lock lever all slide together.
Fore-and-aft adjustment: 180 mm (9 stages)
(F) Adjusting suspension (if equipped)
Turn knob (8) to the right to make the suspension harder,or to the left to make the suspension softer. Adjust the
reading of the dial to match the operator's weight and select the optimum suspension.
REMARK
To obtain the optimum adjustment, turn the knob (8) so that the indicator of the weight display (kg) in the transpar-
ent portion of knob (8) is the same as the operator's weight.
3-65
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OPERATION MACHINE OPERATIONS AND CONTROLS
3. Hold the key in starting switch (3) at the HEAT position (D),
and check that preheating monitor (4) lights up. After about
30 seconds, preheating monitor lamp (4) will flash to indi-
cate that preheating is finished.
(The flashing will stop after approx. 10 seconds.)
REMARK
The monitors and gauges will light up also when the key is
turned to the HEAT position, but this is not an abnormality.
If the temperature is low, the monitor screen may become dark
or it may take time for the display to appear, but this is not an
abnormality.
4. When preheating monitor (4) flashes, turn the key in start-
ing switch (3) to the START position (C) to start the engine.
5. After the engine starts, release the key in starting switch
(3). The key will automatically return to the ON position (B).
6. After starting the engine, do not touch the work equipment
control lever or travel pedal while the engine oil pressure
monitor lamp is lighted up.
3-75
--- Page 17 ---
OPERATION MACHINE OPERATIONS AND CONTROLS
Moving Machine Forward 3
1. Set safety lock lever (4) in the FREE position (F), fold the
work equipment, and raise it 40 to 50 cm from the ground.
2. Operate right and left travel levers (5) or right and left travel pedals (6) as follows.
q When the sprocket (A) is at the rear of the machine
Push levers (5) forward slowly or depress the front part of
pedals (6) slowly to move the machine off.
q When the sprocket (A) is at the front of the machine
Pull levers (5) backward slowly or depress the rear part of
pedals (6) slowly to move the machine off.
3. For machines equipped with a travel alarm, check that the alarm sounds. If the alarm does not sound, please
contact your Komatsu distributor for repair.
REMARK
In cold temperatures, if the machine travel speed is not normal, carry out the warming-up operation thoroughly.
In addition, if the undercarriage is clogged with mud and the machine travel speed is not normal, remove the soil
and mud from the undercarriage.
3-85
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OPERATION MACHINE OPERATIONS AND CONTROLS
Operations Using Bucket Dropping Force
Do not use the dropping force of the machine for digging, or
use the dropping force of the bucket as a pickaxe, breaker, or
pile driver. This will markedly reduce the life of the machine.
Operations Using Machine Dropping Force
Do not use the dropping force of the machine for digging.
Digging Hard Rocky Ground
Do not attempt to directly excavate hard rocky ground with the work equipment. It is better to excavate it after
breaking up by some other means. This will not only save the machine from damage but make for better economy.
Sudden Lever Shifting High Speed Travel
(1) Never carry out sudden lever shifting as this may cause
sudden starting.
(2) Avoid sudden lever shifting from forward (A) to reverse (B)
(or from reverse (B) to forward (A)).
(3) Avoid sudden lever shifting change such as sudden stop-
ping from near top speed (lever release operation).
3-95
--- Page 20 ---
OPERATION MACHINE OPERATIONS AND CONTROLS
3. Lower the bucket horizontally until the bottom touches the
ground.
4. Set safety lock lever (3) in the LOCK position.
5. Stop the engine. For details of the procedure for stopping the engine, see “STOPPING THE ENGINE (3-83)“.
CHECK AFTER SHUT OFF ENGINE 3
Use the machine monitor to check engine water temperature
(1), engine oil pressure (2), and fuel level (3).
REMARK
After stopping the engine, if the starting switch is turned within
approx. 10 seconds to the ON or START position to start the
engine again, the monitor display is not reset, and the screen
before the starting switch was turned OFF is displayed.
3-105
--- Page 21 ---
OPERATION TRANSPORTATION
8. Turn the swing lock switch OFF to release the swing lock.
q When the swing lock switch is turned OFF, display
monitor (4) goes off. OFF
9. Raise the work equipment, pull in the arm under the boom,
then move the machine slowly.
10. When the machine is horizontal on top of the rear wheels
of the trailer, stop the machine.
11. When moving from the rear of the trailer on to the ramps,
set the angle of the arm and boom to 90° to 110°, lower the
bucket to the ground, then move the machine slowly.
12. When moving down the ramps, operate the boom and arm
slowly to lower the machine carefully until it is completely
off the ramps.
3-115
--- Page 22 ---
OPERATION TROUBLES AND ACTIONS
DISCHARGED BATTERY 3
WARNING
q It is dangerous to charge a battery when mounted on a
machine. Make sure that it is dismounted before
charging.
q When checking or handling the battery, stop the
engine and turn the starting switch key to the OFF
position.
q The battery generates hydrogen gas, so there is a haz-
ard of explosion. Do not bring lighted cigarettes near
the battery, or do anything that will cause sparks.
q Battery electrolyte is dilute sulphuric acid, and it will
attack your clothes and skin. If it gets on your clothes
or on your skin, immediately wash it off with a large
amount of water. If it gets in your eyes, wash it out with
fresh water and consult a doctor.
q When handling batteries, always wear protective gog-
gles and rubber gloves.
q When removing the battery, first disconnect the cable
from the ground (normally the negative (-) terminal).
When installing, install the positive (+) terminal first. If
a tool touches the positive terminal and the chassis,
there is danger that it will cause a spark, so be
extremely careful.
q If the terminals are loose, there is danger that the
defective contact may generate sparks that will cause
an explosion. Terminals should be connected firmly.
q When removing or installing the terminals, check
which is the positive (+) terminal and which is the neg-
ative (-) terminal.
Battery Removal and Installation 3
q Before removing the battery, remove the ground cable (normally connected to the negative (-) terminal).
If any tool touches between the positive terminal and the chassis, there is a hazard of sparks being generated.
q When installing the battery, connect the ground cable last.
q When replacing the battery, secure it with battery fitting.
Tightening torque:Tightening battery terminal: 9.8 to 14.7 N·m (1 to 1.5 kgf·m)
3-125
--- Page 23 ---
MAINTENANCE MAINTENANCE INFORMATION
Dusty Jobsite
When working at dusty worksites, do as follows:
q Inspect the air cleaner clogging monitor frequently to see if the air cleaner is clogged.
Clean the air cleaner element at a shorter interval than specified.
q Clean the radiator core frequently to avoid clogging.
q Clean and replace the fuel filter frequently.
q Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust.
q When inspecting or changing the oil, move the machine to a place that is free of dust to prevent dirt from get-
ting into the oil.
Avoid Mixing Lubricants
If a different brand or grade of oil has to be added, drain the old oil and replace all the oil with the new brand or
grade of oil. Never mix different brand or grade of oil.
Locking the Inspection Covers
Lock inspection cover securely into position with the lock bar. If inspection or maintenance is performed with
inspection cover not locked in position, there is a hazard that it may suddenly blown shut by the wind and cause
injury to the worker.
Hydraulic System - Air Bleeding
When hydraulic equipment has been repaired or replaced, or the hydraulic piping has been removed and installed
again, the air must be bled from the circuit. For details, see “BLEEDING AIR FROM HYDRAULIC SYSTEM (4-
43)“.
Hydraulic Hose Installation
q When removing parts at locations where there are O-rings or gasket seals, clean the mounting surface, and
replace with new parts.
When doing this, be careful not to forget to assemble the O-rings and gaskets.
q When installing the hoses, do not twist or bend them into loops with a small radius.
This will cause damage to the hose and drastically reduce its service life.
4-3
--- Page 24 ---
MAINTENANCE LUBRICANTS, FUEL AND COOLANT SPECIFICATIONS
Engine Oil
Anti-freeze
[CD or CE]
Gear Oil Grease Coolant
SAE10W, 30, 40
No. Supplier [GL-4 or GL-5] [Lithium-Base] [Ethylene Glycol
10W30, 15W40
SAE80, 90, 140 NLGI No.2 Base]
(The 15W40 oil
Permanent Type
marked * is CE.)
Multi-purpose white
*Superme duty Multi-purpose 4092 grease 705 Anti-freeze and
14 PENNZOIL
fleet motor oil Multi-purpose 4140 707L White-bearing summer coolant
grease
PETRO- FINA potonic N
15 FINA kappa TD FINA marson EPL2 FINA tamidor
FINE FINA potonic NE
Spirax EP
16 SHELL Rimura X Albania EP grease -
Spirax heavy duty
Sunoco ultra prestige Sunoco antifreeze
Sunoco GL5
17 SUN - 2EP and summer cool-
gear oil
Sun prestige 742 ant
*Ursa super plus Multifak EP2 Coda 2055 startex
18 TEXACO Multigear
Ursa premium Starplex 2 antifreeze coolant
Total EP
Rubia S
19 TOTAL Total Transmission Multis EP2 Antigal/antifreeze
*Rubia X
TM
20 UNION *Guardol MP gear lube LS Unoba EP -
*Turbostar Multigear
21 VEEDOL *Diesel star Multigear B - Antifreeze
MDC Multigear C
4-13
--- Page 25 ---
MAINTENANCE MAINTENANCE PROCEDURE
Install Air Cleaner Element 4
1. Open the battery room door on the left side of the machine,
remove clips (2) at 3 places, then take out cover (3).
2. Remove outer element (4).
Do not remove inner element (5) at this time, however.
NOTICE
When cleaning cover (3), do not remove evacuator valve
(6).
3. Clean the inside of the air cleaner body and the cover (3).
4. Remove inner element (5), then install a new inner element immediately.
CAUTION
When installing the cover (3), check O-ring (7) and replace it if there are any scratches or damage.
5. Set the cleaned outer element in position, then secure cover (3) with mounting clips (2).
6. Replace the seal attached to cover (3) with new one.
4-23
--- Page 26 ---
MAINTENANCE MAINTENANCE PROCEDURE
q Rubber (6) of the rubber pin lock is cut and the steel ball is
about to come out.
q Steel ball (7) sinks in when it is pushed by hand.
4. Clean the surface of adapter (4) and remove the soil with a knife.
5. Hit rubber pin lock (3) by hand or with a metal hammer and
push it into the hole in adapter (4).
When doing this, be careful not to let rubber pin lock (3) fly
out from the surface of adapter (4).
O X
6. Clean the inside surface of tooth (1), then install to adapter
(4). If there is any mud stuck to it or any protrusion, tooth
(1) will not fit properly in adapter (4) and the fitting contact
will be poor.
7. Fit teeth (1) to adapter (4), and confirm that when the
pointer is pressed strongly, the rear face of the hole for the
pin of the teeth is at the same level as the rear face of the
hole for the pin of the adapter.
If the rear face of the pin hole of tooth (1) protrudes in front
of the rear face of the pin hole of adapter (4), do not knock
the pin in.
If this happens, there is something (C) preventing the tooth
(1) from fitting completely in adapter (4), so locate the
problem and remove the obstruction. When tooth (1) fits
completely in adapter (4), knock in lock pin (2).