Valtra VALMET 6200, VALMET 6600, VALMET 6300, VALMET 6400, VALMET 6800 Service Manual
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VALTRA – VALMET
MEGA MEZZO HI-TEC
WORKSHOP MANUAL
Service Manual
Tractors
Power
transmission
Brake
system
Steering system and Front
axle
Frame and
Wheels
Tools
Cab and
Shields
Hydraulics
Valtra Inc.
44200 Suolahti, Finland
Groups 10---100
General
Engine
Electrical
system
40
50
60
70
80
100
90
10
20
30
25
ValtraValmet--tractors, Stanadyne injectors
Tra c t o r Typ e of
injector
Ordering
no of
compl. in-
jector
Ordering no of
nozzle
Nozzle ope-
ning pres-
sure, bar
Adjusting
pressure, bar
(value to be
used both with
new and used
nozzles).
Shims no 1,00...2,00 mm Code C
6000, 6100
6200 (---K41123)
6300 (---K42118)
6400 (---K42107)
6600, 6800 (---L23516)
8000, 8100, 8200
8400
103 kW ( --- K34331)
8050 (---L22533)
8150 (---L24138)
8450(---L24208)
8750, 8550 USA
S/736 8366 39956 8366 39957 230+10 240 8366 40104...8366 40122 736
6900, 8000R USA, 6200 USA, 6300 USA, 8150Hi
8150 (L24139---)
M/423 8368 54755 8368 54757 270+8 278 8368 62000...8368 62020 423
8550 (--- L24115) S/655 8363 40034 8363 39985 230+10 240 8366 40104...8366 40122 655
6250Hi, 6350Hi, 6750Hi, 6850Hi,8350Hi, 8550Hi
6200 (K41124---)
6300 (K42119---)
6400 (K42108---)
6800 (L23517---)
8550 (L24116---)
M/358 8366 59808 8366 59902 270+8 278 8368 62000...8368 62020 358
6550Hi, 6650Hi, 8050Hi, 8450Hi
6400 (L23506---)
8050 (L22534---)
8400
110 kW (K32135 ---L33320)
8450 (L24209---)
M/446 8368 54831 8368 54832 270+8 278 8368 62000...8368 62020 446
8950Hi M/876 8368 54791 8368 54792 270+8 278 8368 62000...8368 62020 876
8400 118 kW (L23130---) M/301 8368 54940 8368 54941 270+8 278 8368 62000...8368 62020 301
22. Fuel system
6000--8950
Model
220
Code15Page
1. 8. 2000
1. 9. 2002
107
Model Code Page
22. Fuel system
1. 6. 1999
6000--8750 222 1
1. 4. 1997
Repair instructions
Fuel feed pump and fuel filter (Op no 222)
Bosch in---line pump
A. Bleeding fuel system
1. Slacken the bleeder screw on the filter head (8200, 8400,
8750 and 8950 have a double filter). Pump with the hand
pump until the fuel flowing out atthe bleeder screwis free from
air bubbles. Then tighten the bleeder screw.
3. Slacken the injection pump overflow valve. Pump with the
hand pump until the fuel flowing out is free from air bubbles.
Tighten the overflow.
4. W ipe off any fuel from the engine.
B. Bleeding thermostart system
Always remove air from the glow plug fuel pipe when thepipe
or reservoir has been emptied during repair work etc. This
preventsdamages to theglow plug causedby lack of fuel during starting.
1. If the reservoir is empty, fill it e.g. with a drip pot through the
breather hole on the reservoir.
2. Open the glow plug pipe connector and drain fuel from the
pipe. Connect the pipe.
C. Measuring fuel feed pressure
Note! Measuring equipment, see page 220/3.
1. Clean the fuel injection pump and the filter and the pipes
between them.
2. Fit the gauge at the banjo connection on the pump, as
shown above (between filter and injection pump).
3. Run the engine at low idling for a while and compare the
gauge reading with the prescribed value (0,6 ---1,0 bar).
N.B. If themeasured pressure is below the prescribed value,
this may be caused by:
--- faulty overflow valve
--- b l o ck e d fu e l fi l te r
--- faulty fuel feed pump
--- blocked or leaking fuel pipes or unions
108
Model Code Page
22. Fuel system
1. 9. 1992
6000--8750 222 2
D. Checking overflow valve
If the fuel feed pressure deviates from the prescribed value,
check the opening pressure of the overflow valve.
1. Connect a pressure gauge to the banjo union in the same
way as in previous instruction C.
2. Pump with the hand pump until the overflow valve opens.
Compare the reading on the gauge at the moment the valve
opens with the prescribed value (0,6 ---1,0 bar).
3. If the recorded opening pressure deviates from the prescribed value, the overflow valve should be changed.
N.B. If the recorded pressure is considerably lower than the
prescribed value, there may be a fault in the hand pump or
the fuel feed pump valves.
E. Changing fuel feed pump valves
1. Clean the feed pump. Disconnect fuel pipes to the feed
pump. Remove the feed pump.
2. Secure the pump in a vice provided with soft jaws. Loosen
the tappet body from the pump and remove the piston, seal
rings, suction valve and the spring.
3. Detach from the pump body the outlet side threaded connector, in which is placed the pressure valve.
4. Rinse thevalves withclean fuel and check the functionand
possible wear.
5. Change the valve if needed and assemble the pump using
new o---rings and gasket
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