Case IH David Brown 990 995 & 996 Tractors Operator’s Manual Instant Download (Publication No.9-5101)

1
DAVID BROWN 990, 995 996 Tractors Operator's
Manual 9-5101
2
THIS SAFETY ALERT SYMBOL INDICATES IMPORTANT
SAFETY MESSAGES IN THIS MANUAL. WHEN YOU SEE THIS
SYMBOL, LY READ THE MESSAGE THAT FOLLOWS AND
BE THE POSSIBILITY OF PERSONAL INJURY OR
DEATH. M171B
If Safety Decals on this machine use the words
Danger, Warning or Caution, which are defined as
follows G DANGER Indicates an immediate
hazardous situation which if not avoided, will
result in death or serious injury. The color
associated with Danger is RED. G WARNING
Indicates an potentially hazardous situation
which if not avoided, will result in serious
injury. The color associated with Warning is
ORANGE. G CAUTION Indicates an potentially
hazardous situation which if not avoided, may
result in minor or moderate injury. It may also
be used to alert against unsafe practices. The
color associated with Caution is YELLOW. If
Safety Decals on this machine are ISO two panel
Pictorial, decals are defined as follows
0 The first panel indicates the nature of the
hazard. 0 The second panel indicates the
appropriate avoidance of the hazard. 0
Background color is YELLOW. 0 Prohibition
symbols such as and
if used, are RED.
X
WA I IMPROPER OPERATION OF THIS MACHINE CAN CAUSE
INJURY OR DEATH. BEFORE USING THIS MACHINE, MAKE
CERTAIN THAT EVERY OPERATOR 0 Is instructed in
safe and proper use of the machine. 0 Reads and
understands the Manual(s) pertaining to the
machine. 0 Reads and understands ALL Safety
Decals on the machine. 0 Clears the area of
other persons. 0 Learns and practices safe use
of machine controls in a safe, clear area before
operating this machine on a job site. It is your
responsibility to observe pertinent laws and
regulations and follow Case Corporation
instructions on machine operation and maintenance.
Oc 2001 Case Corporation
Bur 0-00000 March, 1995 (Revised October, 1997)
CASE and IH are registered trade marks of Case
Corporation
3
DAVID BROWN 990, 995 996 Tractors Instruction
Book
4
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ÿÿ, WA R N t N G ! _at_ Improper operation of this
machine may result in injMry or desth. Before
operating this machine study the SAFETY POINTS
starting on paga 2 and read this book thoroughly.
Loof for this symbol which points out important
safaty precautions. It means ATTENT!ONI
BECOME ALERTS YOUR SAFETY IS INVOLVED I
David Brown pollCy is one of continuous develop-
ment and improvemsnt and therefore the SpacifiCä
- tion details msy have been altered since this
book wen\ to press. Moreover, as the David Brown
tractor is offered in a variety of forme to cover
a large numbsr of markets and applications, this
handbook may contain details of items not
applicable to the particular tractor for which it
has been supplied.
6
DAVID BROWN. Instruction Book 990, 995 and 996
Tractors
David Brown Tractors Limited Meltham
Huddersfield England HD7 3AR Publication 9-5101
oocember 19?3
7
_at_ SAFETY POINTS _at_ Always lock the two foot brako
pedals together when running on the
highway, Always ensura the PTO is sat to low
ratio for implements designed to run at 540
rev/min. Running th6fT\ fast6f may cause a
dangerous mechanical failure. Always ensure the
PTO (and Belt Pulley when fitted) is adaquately
guardsd. Always remove loose clothing when
working near moving parts of tha tQCtOr, ongine
and implements, or ensure that it is adequately
fastened or tied up. Alway9 remove the
ignition/starter key from the tractor when
leaving it unattended, especially where children
have access. Always operate the steering and
driving controls with care, for example Oon't
swsrve or turn sharply at spsed, Dont let the
ctutch in suddenly going up hill or the tractor
may rear up. Dont brake fiercely, especially
going backwards down hitl, Always take extra
care on steeply sloping ground. Move cautiously,
as the sudden swing of a heavy implement, or pull
of a trailer, may cause trouble. Always make
sufe before turning that there is room for any
mounted implement which will swing outwa ds at
the rear. Alwaya hitch trailers to the approved
drawbar or pick-up hitch which is below the
centre line of the rear axle. Do not hitch above
th9 C6t2tf6 lÏFt6. 2
8
IMPORTANT DONT'S Oo Not cary passangers on the
linkages or on the tractor, except in an approxsd
passengar seat. hlßTE Any damaged pans should
ba raplaced immediately with new paps. Bent parts
should not be straightansd but rsplaced and no
wslding should be attempted on the safety frame.
Bolts when replaced, must be of the correct
tensile strangth. Aftsr any accident to a safsty
frams it is adyisable to repon this to your local
safsty ofiicer. Oo Not liR the tractor by the
cab liRinp hooks. These ara dsipned only for
removing a cab from the tractor. Oo Not tow tha
tractor at speed whara power stserinp is fittad,
as tlJerß will b9 no oil pressure from ths powgr
st99ring pump and the stearing will be haavy to
operata.
9
INTRODUCTION Even tha most experienced tractor
user should raad Sections 1, 2, 3 and 4 before
Commencing operations with his new tractor, A
great deal of care goes into the building of
every David Brown tractor. The engine is part
run-in, tha completed tractor is road tested and
at each stage of assembly it is checked by a team
of Quality Control Inspectors, The usar can help
io maintain this in-built quality by carrying out
the simpla tasks outlined in the Regular
Maintenance chapter SeCtion 4, Neglect can lead
eventually to major repairs whiCh are expensive
as well as time wasting, Most difficulties are
experienced through incorrect methods of
operation, Sections 1, 2 and 3 detail the
easiest, quickest and most efficient ways of
operating the tractor, especially the many design
features which are special to the David Brown
Tractor. Coupled with the above is the question
of safety. A tractor can be a dangerous machine
if handled without due caution and know- ledge
gainad beforehand from this book can prevent
accidents. Threa models of tractor are covered in
this book, the 990,995 and the 996 twhich is
known in some countries as the 995 with in-
dependent PTO), The main differences between
thess models is that the 995 and 996 have a
longer stroke and higher powered engine than the
990, and the 996 has fully independent PTO
controlled by a separate hand lever All three
incorporate the Se!ectamatic Hydraulic system,
first introduced by David Brown in 1965, and
which has provad exceptionally reliable snd
simple to operate. Small refinements sinca then
hava further improved tha system. Tha two
versions of the David Brown 4-cylinder diesel
engine used in these tractors are carefully
matched to the transmission and maintain the
David Brown reputation for low fuel consumption
and ease of starting. NOTE Thosa tractors fiued
with independent PTO and stamped with serial
numbers Commencing 995/6/1/980001 are referred to
throughout this book as 996. This should be
particu- larly noted in countries whera the
tractor is known as a 995 with independent PTO.
(References to 995 in this book are confined to
tractors stamped with serial numbers commencing
9g5/1/ 920001).
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TtactONumbeVEngnuNumber When ordering parts or
with any query always quota the full prefix and
serial numbers as follows Tractor letters and
numbers as stamped on right-hsnd edge of tha
chassis front extension at A and on the
identification plate, e.g. 990/1/850001. Engine
Numbers as stamped on the flat venical surface on
the riphthand side of the Gylind9f block at B
and on the identification plate, e,g.
449001/36588. Tractor Serial No,. .. . Engine
Serial No., , Tracto Rmgisraflon No.. The final
drive reduction ratio is stamped in the cenlre of
the raar wheel hub.
11
CONTENTS Safety Points Serial Numbers Take
Special Cars of your New Tractor First Service
(50/100 hours)
Page 2 5 10 10
SECTION 1 DESCRIPTION AND OPERATION GENERAL
14 -26
INSTRUMENT PANEL Engine Stop Control Engine Oil
Warning Light Charge Warning Littht Transmission
Filter Warning Lipht Direction Indicator Hazard
Warning Switch Light Switch Engine Speed Indicator
11-14
12
12
J2 12 13 13 13
15-20 15 15 17 19
LEVERS AND PEDALS Use of the Throttles
Brakes Clutch Differential Lock
21 23 21 22
SYNCHROMESH TRANSIVIISSION Opeadon Ge0 SelecGon
STARTING AND STOPPING ENGINE Staking the Engine
Starting in cold weather Stanins in extreme cold
Stopping the Engine Stopping the Tractor
24.26
24 24 25 25 26
26
SEAT ADJUSTMENT
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Page 27-44 27 28 2B 29 29 29 29 30 31 sz 34
SECTION 2 DESCRIPTION ANO OPERATION
SELECTAMATIC HYDRAULIC SYSTEM Introduction
Selector Dial Pointer Hand Laver Sensing Unit
Finger Guides Lowering Control Dump Valve Lift
Latch Trailed Implements OPERATING WITH DEPTH
CONTROL OPERATING WITH DEPTH WHEEL (TCU) OPERATNG
EXTERNAL EQMPMENT VIA THE 3-WAY VALVE 3-Way Valve
Catch Unit OPERATING EXTERNAL EQUIPMENT WITH LIVE
TAKE-OFF CONTROL VALVES OPERATING WITH HEIGHT
CONTROL SECTION 3 ADJUSTMENTS AND SETTINGS
36 36 40
41 43
45-60
LINKAGE SETTINGS 44
Stabilisers 47
Slotted Lift Rods 47
Drawbar 47
Pick-up Hitch 49
WHEELS AND AXLES 51
Font Tack Adustment 51
Rear Track Adjusment 52
Tack Sethngs for Poughng 52
Tyra Pessues g4
Blaming C4
MULTI-SPEED POWER TAKE-OFF 56
PTO DRIVEN IMPLEMENTS 57
BELT PULLEY. . 57
SELECTIVE SENSING UNIT 57
HIGH CLEARANCE CONVERSION 59
13
SECTION 4 REGULAR MAINTENANCE Introduction Tab)e
of Routine Service Tasks Lubrication Chart Fuel,
Grease and Anti-freeze Specifications Approved
Lubricants
61-76 61 62 65 72 73-76
. 77-412 77 78
SECTION 5 SERVICING INFORMATION Introduction Rem
oval of the Bonnet (hood)
ENGINE Air Cleaner Cooling System Fan Belt
Adjustment Fuel Storage Fual Filter Elements
Sediment Bowl Injectors Venting the Fuel
System Injection Pump and Governor Engine
Lubricating Oil Oil Filter Element Oil Pump Wire
Filter Valve Clearance Cylinder Head Tightening
79-92 79 80 82 82 84 85 86 87 89 89 90 90 91 92
93-104 93 93 94 95 95 98 101 102 103 103 104
CHASSIS Lubrication Front Axle Front Hub Final
Drive Reductions Transmission and Hydraulic
Hydrostatic Power Steering Brakes ClutCh (not
996) Transmission Clutch (996 only) PTO Clutch
(996 only) Belt Pulley Unit
8
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ELECTRICAL . . 105-111
Alternator 105
Auxiliary Equipment . 106
Battery 106
Dynamo (Generator) . 107
Fuse 107
Starter 108
Wiring 108
SECTION 6 SPECIFICATION AND DATA
113-140
Diesal Engine Chassis . . Lighting Equipment
(Bulbs Travel Speed Tables 10/49 finat
drives Travel Speed Tables 11/49 final drives
Travel Speed Tables 9/50 final drives
Accessories Implement and Equipment Manufacturers
Abbreviations
113 119 126 128 131 134 137 138 140
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TAKE SPECIAL GARE OF Y NEW TRAGTOR Although evsry
enpina is tastsd and run in at the factory, care
should ba taken dutin9 the first 25 io 50 hours
use. Avoid excessive spsads or loading. Do not
allow the engina to labour unduly, instead changb
to a lowsr gaar. Use the middla ranga of anpine
spseds from J200 to t800 rav/min. Prolonged light
load should also ba avoidsd as this might Isad to
cylinder wall glazing with conssquent high oil
consumption. Best running-in is achiaxad by
alternating batwaen low/medium and izigh

• rST Sic (a/ nUR\
• The first sewce should be done by a David Brown
  dealer who
• WÏ)l Cüff\' OUt a full Ch9Ck On the tractor. The
  main essentials in
• Change ths engina oil and fi!tar elsment.
• Tha transmission gearbox should be flushed and
  the wire mssh and magnetic filtar cleaned. A new
  paper filtsr elsment should ba fitted and the
  gearbox refilled with new oil.
• Change the oil in the final drive reduction
  housings.
• Check thO tÏghtÜ9SS Of C liftder head bolts and
  the valva clearancas, and the tightnass of main
  sxternal nuts and bolts especially rsar wheel
  nuts.
• NOTE . To ramove any contaminants which may huild
  up n the oil due to initial bedding in, it is
  essential to drain ths lransmission otl and
  rgfill with n9w oil at thO 5_at_/10_at_ hour serVic9
  (ssO pagos 73 to 76).

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SECTION 1. DESCRIPTION AND OPERATION GENERAL
INSTRUMENT PANEL
FIGURE 3 /1. INSTRUMENT PANEL

• Transmission filter weaning light (yellow)
• Water temperature
• H, Hazerd warning switoh
• Fuel purge
• K. Direction indicaioi switoh

• A. Ignition starter switch Lighting switch
• Engine speed indicator
• (or spedomete)
• Change warning light (red)
• Engine oil weaning light (green)

L. Horn push button
M. Engine stop controllchoke Engine stop
Control ThiS Cuts off the fuel supply to tha
injectors, Never stop the engine by ketting ths
tank run dry, This allows air to enter the system
and is very difficult to get rid of. Before
starting the engine pull out the stop control and
lower into the retaining slot. To stop. lift the
knob and allow it to move
17
Engineoilvvaning Wght The green light is
tlluminated when oil pressure is too low, Ensure
thal it tights when the isolating switch is
turned on and goes out when the engine
rurts. Charge warning light The red light is
illuminaled when the isolating switch is turned
on but should extinguish as soon as the dynamo or
alternator commences to charge, Transmission
filter warning light When the fall in preMUfe
across the full flow filtar element 'tn the
hydraulic system is high enough to open the
filter by-pass valve and allow oil io by-pass the
filter element, the yellow warning lamp
illuminates. This may occur ta) when the filter
elament is bloGked with dirt and requires
changing for a new one or (b) when the oil is
cold and engine speed is high, It is also
arranged to light when the isolating switch is
turned on and the driver should check that the
bulb is intact each time before starting the
engine, A faulty bulb should be replaced as soon
as it fails. If the bulb glows or flickers at
idling speeds, this should be The warning lamp
may illuminate at Isss than full engine speeds
when the oil is cold. The engine speed should be
adjusted so that the light is not kept on for
mora than a few minutes otherwise proper
filtering of tha oil will not taka place, As the
filter element becomes blocked with dirt, the
warning light with come on at progressively lower
engine speeds so that, even when the oil is warm,
full working speed may not be achisved without
causing tha bulb to light, When the bulb lights
at 1800 rav/min after a warming up period of 30
minutes the full flow filter element must be
shanged for a new one at the first
opportunity, Direction indicator switch Move
the switch to 1he left to operate tha lah-hand
flashers and vice versa. Do not forget to return
the switch to cantre position ahar use, 12
18
Hazard warning switch (if fitted) When the switch
is puflad out all four flashers work to8ether.
This is useful when workin8 on the highway at
very slow spaeds. fVlake sure it is switched off
befora proceeding normally on the road. Light
switch This has 4 positions 2, Side and tail 3,
Side, mail and head (low beam) 4, Side, tsil and
head (high beam) The rear plough lamp is
controlled by its own switch, mounted on the lamp
housing, The lamp can be switched on whsn the
mein light switch on tha instrument panel is in
any of the positions 2, 3 or 4. Engine speed
indiCator The sngins speed indicator (rev
counter) fitted to the instrument panel, shows
the engine revolutions per minute and should be
used in conjunction with thB Chart attached to
the bonnet (hood) in order to determine the
travel speed of the tractor (see Fig, 1/2)
FIGURE 1/2, GEAR/SPEED CHART
A, 8lve line at iS4O iev/min PRO in law
ratio Red lina st 1000 ravlmin PTO in high refio
C. Rad line at AND ievfmin PRO in mph alia
Alte netive chute ate aveileble shaw'ing speeds
in mile/h ar kmfh end ta suit dJtotent whael
sizes end liriel drtve tiias.
19
The engine speed is n arked along the bottom edge
of th0 ChBft. An imaginary vertical line
projected upwards will cross the VarioUs
horizontal gear bands at the appropriats speed.
The travel speed in any gear can, therefore, be
obtained by first reading the engine speed
indicator and transferring to the
chart, Alternatively, any required travel speed
in an appropriate gear can be projected downwards
and the necessary engine speed determined. The
throttle can then be set to give the required
engine speed as observed on the engine speed
indicator. Uss of the chart for PTO work is
facilitated by the provision of twO red vertical
lines corresponding to the high PTO ratio and a
blue line for the low PTO ratio. Each line is
marked immediately above the engine speed with
tha ratio (high or low) and the PTO speed (540 or
1000). Therefore, having decided which PTO speed
and ratio is required for the type of work in
hand, it is only necessary to inspect the
appropriate vertical coloured line and note which
horizontal band bears the nearest desired travel
spaed and choose the gear ratio shown at the
laft-hand edge, The speed chart gives accurate
speeds for the tyres fitted to the tractor when
new. If it is desired to fit tyres of a different
size, it is only necessary to obtain a new chart
from your dealer for fixing to the bonnet
top. The belt pultey should ba used at a PTO
speed of 1000 rev/min, B, Fig. 1/2.
14
20
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LEVERS AND PEDALS
FIGURE 1/3, PEDALS

• Clutch pedal
• Brake pedals
• Use of throttles

1. Looking bar
2. Fool throttle

Tha rated speed of the enpine is 1800 rev/min
giving a PTO speed of 540 rev/min in low ratio.
This is a convaniant and economical speed for
normal farm work, but where necassary the engine
may be operated undar haavy loads at any spead
between 1400 rev/min and its maximum governed
speed, The speed may be set by observing the
engine speed indicator C, Fig. 1/1. Tho foot
throttle will be found partiCUlarly convenient
for road work and for jobs involving frequent
gear changing, e.g. loader work. Foot throttle To
obtain the full range of engina spaeds from the
foot throttle, the hand throttle should be set to
the idling position. Brakes Twin foot pedals at
the righthand side give independent control of
the brakas to assist stebring in confined SpaCeS,
However, to ensure full braking power on the road
and at higher speeds, the locking bar, C, Fig,
1/3 should be used. 15
22
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the link into your browser. The full manual is
available for immediate download. https//www.ebo
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