Peruzzo TB100 Troubleshooting guide

Model
WOOD CHIPPER
CHIPPER TB100
•Hydraulic engine version: Cod. 01413000
•Tractor-driven version: Cod: 01414000
•Petrol engine version: Cod: 01415000
OPERATION AND MAINTENANCE INSTRUCTIONS
(ENGLISH)

TB 100
PAG. Cod. 9050055 Rev.01 Edit: 09/ 015
Introduction.................................................................................................... 3
Purpose......................................................................................................... 3
Technical characteristics for the version with the petrol engine...................... 4
Technical characteristics of the tractor-driven version ................................... 5
Technical characteristics of the version with the hydraulic engine. ................ 6
Noise............................................................................................................. 6
Lifting points .................................................................................................. 7
Drawbar and hitch or a three-point linkage .................................................... 7
Safety............................................................................................................ 8
Symbols on the machine ............................................................................. 11
Getting the machine ready for work............................................................. 13
Pre-work checks:......................................................................................... 15
Starting up the machine:.............................................................................. 16
Stopping the machine.................................................................................. 16
Preparing for transport on completion of work ............................................. 16
Routine maintenance schedule.................................................................... 17
Fault finding................................................................................................. 23
Long-term storage ....................................................................................... 23
Start-up after long-term storage................................................................... 23
Warranty...................................................................................................... 24

TB 100
PAG. 3 Cod. 9050055 Rev.01 Edit: 09/ 015
Introduction
This manual explains the proper operation of your machine. Read these instructions
thoroughly before operating and maintaining the machine. Failure to do so could result in
personal injury or equipment damage. Consult your PERUZZO supplier, if you do not
understand the instructions in this manual.
CAUTION! This symbol indicates important safety messages in this manual.
When you see this symbol, be alert as to the possibility of injury to yourself or
others, and carefully read the message that follows.
We recommend that you keep this manual on the machine, in the box provided. Note here
the serial number and quote it in any further communications with the supplier. This is
important when ordering any spares. Remember to include all numbers and letters.
Serial Number ..........................................................
Write in the number!
This manual covers the following models.
TB100 Compact Chipper/Shredder with interchangeable cassettes.
Optional 18HP (electric start) Briggs and Stratton Vanguard engines
TB100TM tractor mounted version with gearbox and power take-off (pto) shaft -
version with the hydraulic engine.
Accept where otherwise stated alternative paragraphs and illustrations for engine driven
and tractor mount versions are marked (a), (b) and (c), respectively.
The information in this manual is correct at the time of publication. However, in the course
of development, changes to the machine specification are inevitable. Should you find any
information vary from the machine in your possession, please contact your PERUZZO
dealer for up to date information.
The manual may contain standard and optional features, and is neither to be construed,
nor used as a machine specification.
Purpose
CAUTION! This machine is designed solely for chipping wood and must not
be used for any other purpose. The machine should be operated by the
trained operators only, who are familiar with the content of this instruction
manual. It is potentially hazardous to fit in, or use any parts other than
genuine PERUZZO parts. The company disclaims any and all liability for the
consequences of such use, which also effectively voids the machine warranty.
Fig. 1.1 Serial Number
Serial
Number

TB 100
PAG. 4 Cod. 9050055 Rev.01 Edit: 09/ 015
Technical characteristics for the version with the petrol engine
TECHNICAL SPECIFICATION Petrol engine
Chipping Capacity 4 to 6 m
3
cuttings per hr depending on material
Guaranteed wood diameter 80 mm
Permitted wood diameter 100 mm
Chipping Blades 2 reversible and regrindable blades
Rotor cutting width 310 mm
Power Unit Briggs and Stratton 4 stroke Vanguard V Twin 18hp
with electric start
Fuel Petrol 95 octane (unleaded)
Fuel Consumption (continuous) ca. 2.8 lt/hour
Length 2120 mm
Width 740 mm
Height 1420 mm
Feed Height 790 mm
Weight (Empty) 205 Kg
S
TOP b
utton
Engine controls
Fuel tank
Discharge chute
Stand
Infeed chute
Cutter unit

TB 100
PAG. 5 Cod. 9050055 Rev.01 Edit: 09/ 015
Technical characteristics of the tractor-driven version
TECHNICAL SPECIFICATION
TB100 Tractor
Chipping Capacity 4 to 6 m
3
cuttings per hr depending on material
Guaranteed wood diameter 80 mm
Permitted wood diameter 100 mm
Chipping Blades 2 reversible and regrindable blades
Rotor cutting width 310 mm
Power Unit 15 - 35 HP Tractor with 3 pt. linkage and pto drive
Drive Shaft 6 spline 1.3/8” P T O drive from tractor
Support Linkage 3 point linkage Cat. 1 or Cat 1N
Length 2080 mm
Width 810 mm
Height 1290 mm
Feed Height 660 mm
Weight (Empty) 170 Kg
Drive belt cover
A tree-point linkage
Infeed chute
Cutter unit
Discharge chute

TB 100
PAG. 6 Cod. 9050055 Rev.01 Edit: 09/ 015
Technical characteristics of the version with the hydraulic engine.
TECHNICAL SPECIFICATION TB100 Hydraulic engine
Chipping Capacity 4 to 6 m
3
cuttings per hr depending on material
Guaranteed wood diameter 80 mm
Permitted wood diameter 100 mm
Chipping Blades 2 reversible and regrindable blades
Rotor cutting width 310 mm
Power Unit Hydraulic engine
(Tractor with a pump of 40 l/min min. capacity)
Support Linkage Attachable loader - optional
Length 2080 mm
Width 810 mm
Height 1290 mm
Feed Height 660 mm
Weight (Empty) 170 Kg
Noise
Noise levels vary, depending on the specific type of material being processed. Also the
duration of the operation itself may differ. Noise emission tests had been carried out and
the guaranteed sound power level is displayed on the CE plate as follows: Lwa 120dB(A)
Attachable loader (optional)
Infeed chute
Control lever
Discharge chute

TB 100
PAG. 7 Cod. 9050055 Rev.01 Edit: 09/ 015
Minimise noise by slowing to idle, or by stopping the engine whenever chipping is
not in progress.
CAUTION! Operators must wear appropriate ear protection.
Bystanders must be kept away from machine’s proximity.
Lifting Points
Ensure the infeed chute is folded
in and secured for transport. Sling
from tubular handles of fixed
section of infeed chute and lifting
point on discharge chute.
Drawbar and hitch or a three-point linkage
(a) Ring type hitch
(b) tractor three-point linkage
(c) linkage loader - optional
CAUTION! Ensure that the towing vehicle or tractor is correctly suited to the
machine weight and (a) drawbar (nose) loading. If necessary, please check
with the national vehicle legislation.
At work When being moved around
Insert the safety pin

TB 100
PAG. 8 Cod. 9050055 Rev.01 Edit: 09/ 015
Safety
3.1 ENSURE:
3.1.1 All Operators must be fully trained in the use of the machine.
3.1.2 The Operating Manual is read and understood.
3.1.3 The enclosed OSH guidance notes are read and understood.
3.1.4 Appropriate Personal Protective Equipment (PPE) is worn, including non-snag
clothing, gloves, eye and hearing protection.
3.1.5 The machine is positioned on level ground, and is level with the infeed chute at no
less than 600 mm (23.62 inches) above the ground level (Fig 3.4.3).
3.1.6 All guards are fitted in and in good condition.
3.1.7 Blades are in good condition and secure.
3.1.8 All blades are sharpened, or always replaced in sets only.
3.1.9 All fasteners are regularly checked for tightness.
3.1.10 Only WOODEN materials, free of nails, etc., are fed into the machine.
3.1.11 Correct First Aid Kit, including large wound dressing, is available on site.
3.1.12 Fire extinguisher is available on site.
3.2 NEVER:
3.2.1 Work on the machine, until the chipper disc is not stationary and the engine has
stopped.
3.2.2 Operate the machine without protective clothing on (eye protection, ear muffs, and
gloves), or high visibility clothing, when working on the roadside.
3.2.3 Operate with loose articles of clothing, including loose cuffs on gloves.
3.2.4 Work under a raised component without adequate safety support.
3.2.5 Operate the machine with untrained personnel, or with any individuals around
who are not involved in the chipping operation.
3.2.6 Leave the machine unattended with the engine running at full operating speed.
(See Section 4)
3.2.7 Put any part of your body into the infeed chute, while the machine is running.
3.2.8 Operate the machine, whilst under the influence of alcohol or drugs.
3.2.9 Operate inside a building, or in a confined space.
3.2.10 Climb onto the infeed chute.
3.2.11 Impede or obstruct the STOP control button.
3.2.12 Operate a p.t.o. driven machine disconnected from and unsupported by its power
source

TB 100
PAG. 9 Cod. 9050055 Rev.01 Edit: 09/ 015
3.3 ALWAYS:
3.3.1 Check the machine before starting up (see Section 4 Preparation and Section
5.1 Operation: Pre-work checks).
3.3.2 Be aware of potential hazards in the work area, i.e. uneven ground, tree roots,
trip/slip hazards, obstructions and type of materials being fed into the machine.
3.3.3 Feed from the side.
3.3.4 Keep clear of the discharge area.
3.3.5 Have a second trained operator within easy reach of the machine.
3.3.6 Maintain strict discipline at all times.
3.3.7 Service machine at the specified periods (see Section 6: Routine Maintenance).
3.3.8 Note direction of the discharge chute, and, if necessary, note the wind direction to
prevent debris from being blown into a highway, or where it could affect members
of the public.
3.3.9 Remove the ignition key before doing any maintenance.
Fig. 3.4.1a STOP button Fig. 3.4.2 Engine switch-off
Fig. 3.4.1c STOP and START-levers
STOP
button Engine
switch-off
Stop
start return

TB 100
PAG. 10 Cod. 9050055 Rev.01 Edit: 09/ 015
3.4 Safety controls and switches
3.4.1a Emergency Stop (Fig 3.4.1a)
In the event of an emergency, push the STOP button. This will lock in position
to stop the engine and the machine.
3.4.1c Emergency Stop (Fig 3.4.1c)
In the event of an emergency, push the lever shown on the figure in order
to stop the chipper running.
3.4.1.1 Once the emergency has been rectified, the following sequence should be
carried out:
3.4.1.2 Check over the machine for any blockages.
3.4.1.3 To reverse the cutter, remove the drive guard, and, using a bar through the hole
in the cutter spindle, manually turn the cutter to free the obstruction
(See Section 5, Fig. 5.3a)
3.4.1.3c In the hydraulic engine version, in order to reverse the cutter push the lever as
shown on Fig. 3.4.1c
3.4.1.4a After clearing the blockage, pull the STOP button out and restart the engine.
3.4.2 Engine stop switch
3.4.2.1 To stop the engine, push the cut-off switch to the ‘0’ position (Fig 3.4.2), or
(electric start) turn the key switch anticlockwise.
CAUTION! Do not restart the engine until the hazard has been removed.
Fig. 3.4.3 Infeed chute height
Infeed chute
height 600 mm

TB 100
PAG. 11 Cod. 9050055 Rev.01 Edit: 09/ 015
Symbols on the machine
These relate to operator safety, correct use and maintenance of the machine. Check that
all personnel understand and are familiar with the meanings before operating the machine.
1)
Read the Operating Manual
before starting up the
machine.
2)
Debris expulsion hazard.
Maintain a safe distance.
3)
Cutting hazard in contact with
moving parts. Wait until all
moving parts are stationary.
4)
Crushing hazard. Do not
enter the space between the
tractor and the machine.
5)
Note the PTO revs.
Contact hazard with
PTO at 540 rpm.
6)
Lubrication points
(Lubrication required
every 40 work hours.
7)
Lifting points.
8)
Wear personal
protection gear
AT ALL TIMES.
1-2
3
4
5
6
6
7
8

TB 100
PAG. 1 Cod. 9050055 Rev.01 Edit: 09/ 015
Daily Checks
Sound
level
Wearing ear-mufflers
manmandatory
Make sure that both the machine data plate and the hazard warning stickers are clean and
properly maintained at all times. Ask the manufacturer for the replacements, if required.
Place the replacements in the original positions.
It is strictly prohibited to have the hazard warning stickers mispositioned or removed
altogether from the machine.
Important Operating Checks Notice
Every 8 Hours –
Daily checks Stop Engine
1. Check the
machine is
level
2. Check
engine oil
level
3. Check
engine air
filter
4. Check
infeed chute
is clear of
debris
5. Check
cutter is
clear of
debris
6. Check all
guards and
flaps are in
place
7. Lock
discharge
chute
8 Start
Engine
9. Increase
from Idle to
Run

TB 100
PAG. 13 Cod. 9050055 Rev.01 Edit: 09/ 015
4.0 Getting the machine ready for work
4.1a Initial fuelling and parking
4.1.1a Position the machine on the level ground and ensure the stand is secure
(Fig 4.1a). Secure the machine support with an appropriate safety pin (Fig. 4.1a).
4.1.2a Fill the fuel tank with petrol.
4.1.3a Check the engine oil level.
4.1.4a Check that the STOP button is released.
4.1b Fitting the machine to the tractor
4.1.1b Remove the top, and lower the linkage pins on the chipper (Fig 4.1b)
4.1.2b Lower the three-point linkage on the tractor and reverse up to the chipper.
4.1.3b Insert each tractor lower lift arm in the corresponding clevis on the frame,
and insert each lower linkage pin.
4.1.4b Secure the pins with the clips provided.
4.1.5b Adjust the top link to the correct length and insert the linkage pin through
the frame, then secure with the clips provided.
4.1.6b Switch off the tractor engine.
4.1.7b Check that the PTO shaft is of the correct length. When fully retracted,
the distance between the two parts must not exceed 4 cm, when fully extended,
the two parts must overlap by no less than 15 cm; see the figure further below.
Fig. 4.1b Tractor coupling and PTO
Fig. 4.1a Support and discharge chute
Support
PTO shaft
Lower link pin
STOP
button
Upper link pin

TB 100
PAG. 14 Cod. 9050055 Rev.01 Edit: 09/ 015
4.1.8b Connect the drive shaft to the tractor's PTO and then to the machine, whilst
making sure that the direction of rotation is identical, as indicated on the shaft, until
the buttons spring out into their correct locations. Secure all connection points with
the safety chains.
4.1.9b Make sure that the machine is level and properly secured to the tractor's PTO.
4.1c Fitting the hydraulic version of the machine
4.1.1c Connect the machine to the appropriate connection point (optional - on request)
4.1.2c Connect the hydraulic tubes to the tractor.
NOTA BENE: With regard to powering the hydraulic version, it is recommended to have
the tractor of 40 lt/min capacity. Maximum pressure may not exceed 250 bar.
CAUTION!
The infeed chute may not be used at less than 600 mm above ground (Fig. 3.4.3)
4.3 Discharge Chute (Fig 4.3)
4.3.1 Release the spout clamp, remove and reset the spout in the desired direction and
tighten the clamp.
4.3.2 Set the flap at the desired height.
CAUTION!
Observe wind direction - avoid danger of discharge being blown towards the operator.
Fig. 4.3 Discharge chute
Fig. 4.1b Attachment for the hydraulic version
Control
lever
Attachable loader
(optional)
Spout bolts

TB 100
PAG. 15 Cod. 9050055 Rev.01 Edit: 09/ 015
5.0 Pre-work checks:
5.1.1 Check the machine is stable with the support stand lowered and the pin in place
(fig 5.1.1).
5.1.3a Check the engine oil level (Fig 5.1.2a - See also 6.2 and Engine instruction manual).
5.1.4a Check the engine air filter (see Section 6.4)
5.1.5 Check the fasteners for tightness.
5.1.6 Check the cutter is free to turn.
5.1.6.1 If blocked, remove the drive guard and, using a bar through the hole in the cutter
spindle, manually turn the cutter until free of any obstruction (Fig. 5.3a).
5.1.6.2 Check the tightness of blade bolts and the condition of the blades. See 6.7 for
cutter blade servicing.
5.1.6.3 Remove any loose material.
5.1.7 If any bolts are loose, refer to the maintenance section for any further action.
5.1.8 Check the discharge chute and the flap is in the desired position and that all the
clamps are tight (see Section 4.3)
5.1.10 Check the infeed rubber flaps are intact. Have them replaced, if damaged, before
recommencing any operations.
5.1.11 Check the work area and place the warning signs and traffic cones around the
discharge area, if necessary.
5.1.12 Check that ALL applicable safety procedures have been followed.
Fig. 5.3a Unblocking
the rotor
Fig. 5.2a Engine controls
Fig. 5.1.1 Support
Support and
pin
Fig. 5.1.2a Engine oil and fuel
Fuel intake
Fuel tap Dipstick
Start-up/stop
Throttle
Air valve
Hole for rotor
unblocking bar

TB 100
PAG. 16 Cod. 9050055 Rev.01 Edit: 09/ 015
5.2a Starting up the machine:
5.2.1a Check that all other personnel are clear of the machine.
5.2.2a Check that the machine STOP button is pulled out to start.
5.2.3a Turn the engine start switch to position I. (Fig. 5.2a)
5.2.4a Open the fuel tap by putting the vane to vertical.
5.2.5a Set the throttle to SLOW and pull out the choke.
5.2.6a Turn the ignition key, or pull the starter cord to start the engine.
5.2.7a Push the choke back in.
5.2.8a Set the throttle to FAST.
5.2b Starting up the machine:
5.2.1b Check that all other personnel are clear of the machine.
5.2.2b Start the tractor and engage the pto according to the tractor instructions.
5.2.3b Increase the tractor speed to set 540 rev/min at pto shaft.
5.2c Starting up the machine
5.2.1c Start up the tractor and then slowly push the control lever, Fig. 3.4.1
5.3a Stopping the machine
5.3.1a Push the red STOP button.
5.3.2a Switch the ignition key to position 0.
5.3.3a Wait for the engine and cutter to stop.
CAUTION! The cutter may take several seconds to stop due to its inertia.
5.4 Operating hints
5.4.1 Reduce the engine/tractor throttle to SLOW, whilst further material is collected
for chipping.
5.4.2 Take care when feeding wood into the machine to allow for awkward shapes
to “KICK BACK”, when coming into contact with the cutter.
CAUTION! Do not adjust the discharge chute, when chipping is in progress.
CAUTION! A build-up of debris creates an overheating of the engine hazard, as well
as a risk of fire.
CAUTION! Keep the working area around the machine clear at all times and check
that only authorised personnel are present.
5.5 Preparing for transport on completion of work
5.5.1 Check that the engine has stopped and the cutter is stationary.
5.5.2 Shake the machine and remove any surplus material from the infeed chute and
the machine surfaces.

TB 100
PAG. 17 Cod. 9050055 Rev.01 Edit: 09/ 015
6.0 Routine maintenance schedule
Where applicable: (a) refers to the Engine Driven version; (b) refers to the Tractor
driven version; (c) refers to the version with the hydraulic engine
Note: Belt guard requires either a spanner or a hexagon key for removal.
CAUTION! Always press the STOP button, switch the engine to position 0 and check
for any rotation before carrying out any maintenance. In the tractor driven version, or the
one with the hydraulic engine, pull the hand brake, and take the ignition key out. Check for
any rotation before commencing any maintenance.
Action
Section
DAILY
Check engine oil level (ref: engine manual) 6.2
Check fuel level 6.3
Clean air cleaner (Engine driven only) 6.4
Check drive belt(s) 6.5
Check p.t.o. shaft and guard (ref: suppliers instructions)
Check condition of infeed chute rubber flaps 6.6
Check condition of cutter blades and retaining bolts 6.7
First 50 hours
Check drive belt tension 6.5
Check wheel and tyre condition and pressures 6.9
Check all mountings 6.11
Check battery levels (if fitted) 6.12
Service engine (engine driven only) Refer to engine manual
Weekly in addition to Daily actions
Check drive belt tension 6.5
Steam clean machine 6.8
Clean air cleaner 6.4
Check wheel and tyre condition and pressures 6.9
Grease all the bearings and pivots 6.10, 6.1
Check all mountings 6.11
Check battery levels (if fitted) 6.12
Check the counter blade wear 6.7.15
250 hours in addition to Daily and Weekly actions
Check condition of bearings and pivots 6.10
Service engine (engine driven only) Refer to engine manual
Check axle mounting bolts for tightness 6.11
Check and grease wheel spindles 6.10
500 hours in addition to Daily and Weekly actions
Change gearbox oil (tractor mounted only) 6.13
ENGINE MAINTENANCE REFER TO ENGINE MANUAL
Tyre Pressure 1.4 bar (20 lb/in
2
)
Recommended lubricants
Specification
Grease Complex grease EP2 (high temperature)
Engine SAE 15W-40 APICD
Gearbox (tractor mounted) Gearbox oil EP/220,capacity 0.8 l

TB 100
PAG. 18 Cod. 9050055 Rev.01 Edit: 09/ 015
6.1 Lubrication points (see 6.14)
Machine lubrication points
6.1.1 Cutter bearing (remove guard) 1 nipple
6.1.2 Cutter bearing (non-drive end) 1 nipple
6.1.3 Wheel spindles Remove wheel - smear with grease
6.1.4 p.t.o. shaft - both ends 2 nipples
6.1.5 Gearbox Check oil level and top-up, as required
Note. Do not overgrease the bearings, as damage to seals may occur.
Fig. 6.1b Lubrification points - tractor driven version; hydraulic engine version
Fig. 6.1a Lubrication points - petrol engine version
6.1.1 6.1.2
6.1.4
6.1.5
6.1.1 6.1.2
6.1.3

TB 100
PAG. 19 Cod. 9050055 Rev.01 Edit: 09/ 015
6.2a Engine oil
6.2.1 Check daily (Fig. 6.2).
Refer to the engine manual to refill.
Engine oil filter
Refer to the engine manual for replacement.
6.3a Fuel level
6.3.1 Check daily before work and fill up,
as required (Fig. 6.2).
CAUTION! Use clean, 4-stroke petrol
fuel only. If in doubt, use a funnel with a filter.
6.4a Air cleaner
Weekly
6.4.1 Remove the cover (Fig 6.4).
6.4.2 Unscrew the nut to slide out the
element and either blow out with air-
line, or gently tap on the smooth
ground to release any debris.
6.4.3 Replace element and cover.
6.4.4 Ensure the hand nuts are secure.
6.5 Drive belts (Fig. 6.5)
CAUTION! Always press the STOP
button, switch the engine to position 0 and
check for any rotation before carrying out
any maintenance. In the tractor driven
version, or the one with the hydraulic
engine, pull the hand brake, and take the
ignition key out. Check for any rotation
before commencing any maintenance.
Check daily, before work.
6.5.1 Remove the guard and inspect the
tension of the drive belts. The belt
should yield 6 mm when pressed
with a 2kg force at the point
indicated at Fig. 6.5
6.5.3 Loosen up the pulley nut (A), loosen
up the locknut (B), and adjust the
screw (C) until the desired belt
tension is set.
6.5.4 Tighten up the pulley nut (A) and
locknut (B), then replace the covers.
Note: Re-tension the brand-new belts
after 5 working hours
Fig. 6.4 Air filter
Air filter
Cover
Fig. 6.2
Fuel intake and engine oil
dipstick
Fuel intake
Dipstick
Oil intake
Fig. 6.5 Drive belt
Belt must yield
6 mm when
pressed with
2kg force
(A)
(B)
(C)

TB 100
PAG. 0 Cod. 9050055 Rev.01 Edit: 09/ 015
Replacement
6.5.5aRelease the pulley bolt and slacken
the tensioning screw to allow the
drive belts to be removed (see
section 6.5.3. - 6.5.4)
6.5.6 Fit the brand-new belts, ensuring
they lie snugly in the pulley grooves.
6.5.7 Tension the belts, tighten the pulley.
bolts and replace the guard securely.
Note: Re-tension the brand-new belts
after 5 working hours (engine driven
version only).
6.6 Infeed chute flaps (Fig. 6.6)
Two slitted flaps protect the operator from
material being thrown back up the infeed
chute.
6.6.1 Replace the flaps, if damaged.
CAUTION! Do not operate with any
missing or damaged flaps.
6.7 Cutter blade servicing
CAUTION! Always press the STOP
button, switch the engine to position 0 and
check for any rotation before carrying out
any maintenance. In the tractor driven
version, or the one with the hydraulic
engine, pull the hand brake, and take the
ignition key out. Check for any rotation
before commencing any maintenance.
The cutter cassette is removed as a unit to
service the cutter blades.
6.7.1 Remove the drive belt guards.
6.7.2 Remove the drive belts, as referred
to in section 6.5 above
6.7.3 Loosen up the clamp and remove the
lower drive wheel (A). Remove the
pin (B) blocking the cutter unit in
place - Fig. 6.7.
6.7.4 Unscrew the nuts (C) and carefully
remove the cutter unit, as shown on
Fig. 6.7.1
Fig. 6.6 Infeed chute rubber flaps
Rubber Flaps
A
B
Fig. 6.7
Fig. 6.7.1