141
Model Code Page
31. Tractor electrical system
6000--8950 310 1
1. 6. 1999
1. 11. 1998
General
The tractor electrical system, ACII, AC 2.1, AC 2.2 and SigmaPower are described in section 31. The tractor is also equipped
with an electro--- hydraulically controlled power lift, see section 32. Agrodata performance monitor, AD---instrument and Field-
Master are available as an optional equipment, see section 33. 6600E---8750E models have an electric control system ECS:
Autocontrol---III, see section 34, Autocontrol IV, see section 35. CareTel is described in section 36 and AC V in section 37.
Valmet 6000---8750 tractors have 12 V electrical system (negative earthing). Battery (12 V, 160 Ah) is fitted in the engine com-
partment in front of the cab.
Voltage 12 V.........................................................................
Battery, 6000--- 6850 160 Ah..............................................................
Battery, 8000--- 8950 184 Ah..............................................................
Alternator:
--- M a g n e t i M a r e l l i 870 W................................................................
--- Iskra, 6800, 8050--- 8750 1,28 kW........................................................
Starter motor:
--- M a g n e t i M a r e l l i 3kW................................................................
--- Iskra, 6000---8400 / 8050---8950 3,1/3,6 kW..................................................
Safety start operated by the clutch pedal.....................................................................
Bulbs:
--- h e a d l i g h t s 60/55 W---H4....................................................................
--- rear lights/brake lights 5/21 W..........................................................
--- direction indicators 21 W.............................................................
--- w o r k i n g l i g h t s 55 W ---H3.................................................................
--- instrument panel and warning lights 2 W---1,2 W..............................................
--- c a b i n l i g h t 2X10W---4 W....................................................................
--- parking light 5W..................................................................
Safety prec autions for the electrical sys-
tem:
--- always connect the battery with the correct polarity
--- disconnect the negative lead of the battery first and connect
it last
---disconnect the battery leads before removing the alternator
--- remove the battery caps during charging to prevent the
buildupofexplosivegasesinthebattery
Important!
The alternator wiring must be disconnected before arc
welding is carried out on the tractor or an implement
which is attached to it.
Never run the engine with the alternator disconnected.
Do not attempt to connect any additional electrical equip -
ment, as this may damage components of the existing
electrical system.
Alternator
The tractor has a negative ---earthed alternator which can eas-
ily be damaged if incorrect connections are made in the elec-
trical system. For example, connection of the battery with
wrong polarity can burn the alternator or rectifier. The charg-
ing current circuit must not be broken when the engine is run-
ning.
Battery checks and maintenance
--- Check the charge in the battery using a hydrometer (acid
tester). The density of the electrolyte should be at least 1,23.
--- Make sure that the fan belt (belts) are always correctly ten-
sioned.
--- Keep the battery clean. It can be washed with lukewarm
water after removal from the tractor..
--- Also clean the pole studs, the cable terminals and the bat-
tery retainer thoroughly. Wash off oxidized spots with water.
Wipe the outside of the battery when it is clean, and coat the
pole studs and the cable terminals with petroleum jelly.
--- R e f i t t h e b a t t e r y.
Caution!
It is forbidden to smoke or have a naked flame
near the battery. The battery gives off explosive
hydrogen gas!
Battery electrolyte is corrosive.
IMPORTANT WARNING! Always when the
electric welding is done to the tractor, discon-
nect both battery cables (+ and ---) and alterna-
tor wires. Otherwise the tractor electric system
(e.g. Σ ---Power, CareTel, Agrodata, AC/ACD
power lifts, ACIII, ACIV, ACV etc.) can be dam-
aged.
Note! Auxiliary equipment must be fitted ac-
cording to the instructions. Fuse nominal current
rating must be checked before fitting. On HiTech
models any auxiliary components must not be
fitted to the AC V electric circuit (e.g. F24)
(safety risk).
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