Discovery 2. Manual — part 384
GENERAL DATA
04-9
Fuel system - V8
Cooling system - Td5
Type
Multiport injection from pressure regulated, returnless supply
Pump
Electric submersible
Regulated pump output pressure
3.5 bar (50.75 lbf.in
2
)
Fuel pump delivery
120 litres/hr (211 pints/hr) (234 US pints/hr)
Filter
In-line canister
Air filter
Mann and Hummell P0036
Type
Pressurised, spill return partial flow, thermostatically controlled
Cooling fans
11 blade axial flow on viscous coupling and 11 blade axial flow
electric
Electric cooling fan switching points:
For A/C system:
Þ
On
When vehicle speed is 50 mph (80 km/h) or less and ambient
temperature is 28
°
C (82
°
F) or more
Þ
Off
When vehicle speed increases to 62.5 mph (100 km/h) or ambient
temperature decreases to 25
°
C (77
°
F)
For engine cooling during normal running:
Þ
On
110
°
C (230
°
F)
Þ
Off
105
°
C (221
°
F)
For engine cooling at ignition off (to counteract heat
soak):
Þ
On
If, within 10 seconds of ignition off, engine coolant temperature is
105
°
C (221
°
F) or more
Þ
Off
After 10 minutes or if engine coolant temperature decreases to
100
°
C (212
°
F)
Coolant pump
Centrifugal impeller, belt driven from crankshaft
Thermostat
Waxstat with pressure relief valve
Thermostat opening temperature:
Þ
Initial opening
82
°
C (179
°
F)
Þ
Fully open
96
°
C (204
°
F)
Expansion tank cap relief valve - system operating
pressure
1.4 bar (20.3 lbf.in
2
)
Fuel cooler thermostat opening temperature
82
°
C (179
°
F)
GENERAL DATA
04-10
Cooling system - V8
Clutch - Td5
Type
Pressurised, spill return, thermostatically controlled water and
antifreeze mixture. Vertical flow radiator with remote header tank
and pump assisted
Cooling fans
9 blade axial flow on viscous coupling and 11 blade axial flow
electric
Electric cooling fan switching points:
For A/C system:
Þ
On
When vehicle speed is 50 mph (80 km/h) or less and ambient
temperature is 28
°
C (82
°
F) or more
Þ
Off
When vehicle speed increases to (62.5 mph (100 km/h) or
ambient temperature decreases to 25
°
C (77
°
F)
For engine cooling during normal running:
Þ
On
100
°
C (212
°
F)
Þ
Off
94.5
°
C (202
°
F)
For engine cooling at ignition off (to counteract heat
soak):
Þ
On
If, within 10 seconds of ignition off, intake air temperature is 60
°
C
(140
°
F) or more and engine coolant temperature is 110
°
C (230
°
F) or more
Þ
Off
After 10 minutes or if engine coolant temperature decreases to
100
°
C (212
°
F)
Coolant pump
Centrifugal impeller, belt driven from crankshaft
Coolant pump drive ratio
1.293 : 1
Coolant pump output at 1000 rev/min
10 litres/min (2.64 US galls/min) at 0.7 bar (10 lbf.in
2
)
Thermostat
Waxstat with pressure relief valve
Thermostat operating temperature:
Þ
Initial opening
82
°
C (179
°
F)
Þ
Fully open
96
°
C (204
°
F)
Expansion tank cap relief valve - system operating
pressure
1.4 bar (20 lbf.in
2
)
Type
Diaphragm spring, hydraulically operated with self-centering,
preloaded release bearing
Drive plate diameter
267 mm (10.5118 in)
Pressure plate diameter
267 mm (10.5118 in)
Clutch plate friction material
Verto F202
Diaphragm finger height when clamped on a 8.5 mm
(0.33 in) thick gauge plate
42.5 to 48.5 mm (1.673 to 1.904 in)
Diaphragm finger clearance (service limit)
1.00 mm (0.040 in)
Clutch plate thickness under 6500 N (1461 lb) axial
load:
Þ
New
8.2 to 8.8 mm (0.33 to 0.34 in)
Þ
Service limit
7.0 mm (0.27 in)
GENERAL DATA
04-11
Clutch - V8
Type
Diaphragm spring, hydraulically operated with self-centering,
preloaded release bearing
Clutch plate friction material
APTEC 385
Drive plate diameter
267 mm (10.5118 in)
Pressure plate diameter
268 mm (10.5512 in)
Clutch plate thickness (clamped state)
Þ
New
8.4-8.9 mm (0.33-0.35 in)
Þ
Service limit
7.1 mm (0.28 in)
Rivet depth:
Þ
New
1.73 mm (0.07 in)
Þ
Service limit
0.25 mm (0.01 in)
Clutch plate runout:
Þ
New
0.5 mm (0.02 in)
Þ
Service limit
0.5 mm (0.02 in)
GENERAL DATA
04-12
Manual gearbox - R380
Type
Single helical constant mesh
Gears
5 forward, 1 reverse, all synchromesh
Gear ratios: Td5 Diesel
Þ
First
3.692 : 1
Þ
Second
2.132 : 1
Þ
Third
1.397 : 1
Þ
Fourth
1.0 : 1
Þ
Fifth
0.770 : 1
Þ
Reverse
3.536 : 1
Gear ratios: V8 Petrol
Þ
First
3.321:1
Þ
Second
2.132:1
Þ
Third
1.397:1
Þ
Fourth
1.0:1
Þ
Fifth
0.732:1
Þ
Reverse
3.536:1
Baulk ring clearance:
Þ
New
0.500 mm (0.0197 in)
Þ
Service limit
0.500 mm (0.0197 in)
Þ
Selector fork pad widths - minimum
6.5 mm (0.255 in)
First gear end float:
Þ
New
0.050 - 0.200 mm (0.0020 - 0.0079 in)
Þ
Service limit
0.327 mm (0.0129 in)
Second gear end float:
Þ
New
0.040 - 0.210 mm (0.0016 - 0.0083 in)
Þ
Service limit
0.337 mm (0.0133 in)
Third gear end float:
Þ
New
0.110 - 0.210 mm (0.0043 - 0.0083 in)
Þ
Service limit
0.337 mm (0.0133 in)
Adjust fifth / reverse hub - shim to
Þ
New
0.005 - 0.055 mm (0.0002 - 0.0022 in)
Þ
Service limit
0.055 mm (0.0022 in)
Reverse gear idler shaft clearance
Þ
New
0.040 - 0.380 mm (0.0016 - 0.0150 in)
Þ
Service limit
0.380 mm (0.0150 in)
Mainshaft end float:
Þ
New
0.000 - 0.050 mm (0.0000 - 0.0020 in)
Þ
Service limit
0.000 - 0.050 mm (0.0000 - 0.0020 in)
Layshaft end float:
Þ
New
0.000 - 0.050 mm (0.0000 - 0.0020 in)
Þ
Service limit
0.000 - 0.050 mm (0.0000 - 0.0020 in)
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