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Scania Generator set en-GB 2 374 139. Operator’s manual - part 4

Maintenance

Checking electrolyte level

1. Check that the electrolyte level is at the cor-

rect level above the plates in all cells (see ta-

ble).

2. Top up with distilled water when necessary.

Battery capacity

X = Electrolyte level

above the plates

X

140 Ah

20-25 mm

175 Ah

20-25 mm

180 Ah

20-25 mm

220 Ah

30-35 mm

225 Ah

30-35 mm

Electrolyte level for low maintenance battery

Battery capacity

Electrolyte level above

the plates

180 Ah

30-35 mm

Checking state of charge

Note:

Unless the generator set is equipped with a bat-

tery charger (optional), an external battery

charger must be connected when necessary to

charge batteries.

1. Check the density with an acid tester.

In a fully-charged battery it should be:

-

1.280 g/cm³ at +20°C

-

1.294 g/cm³ at 0°C

–

1.308 g/cm³ at -20°C

2. Charge the battery if density is lower than

1.20 g/cm³. A discharged battery freezes at -

5°C.

IMPORTANT!

Disconnect the cable terminal prior to charging

to prevent damage to the engine control unit.

Avoid boost charging as this damages the battery

over time.

Note:

It is not possible to measure the specify gravity if

the battery has recently been topped up with dis-

48

Maintenance

Exhaust system

Draining of water in the condensation

separator

1. Remove the condensation separator drain

valve and drain the water.

2. Refit the drain valve.

Condensation separator, silencer

Engine

Retightening of screws for engine

brackets

Retighten the screws in the 2 engine brackets,

one bracket on either side.

Tightening torque: 128 Nm.

Running

Every month during storage

When starting at low temperatures, Scania rec-

ommends that the engine heater (optional) is

turned on before starting.

Engine bracket

Start and run the engine until operating tempera-

ture is reached and then perform the maintenance

items below.

1. Checking oil level.

2. Checking coolant level.

3. Checking air cleaner vacuum indicator.

4. Check for engine leaks.

50

Maintenance

Generator

Retightening screws for connectors

WARNING!

Make sure the generator has cooled down before

the actions are carried out.

Generator Mecc Alte

IMPORTANT!

Use counterhold during tightening to prevent the

plastic rail from breaking.

1. Loosen the 8 screws on the upper hatch of the

generator and remove the hatch.

2. Tighten the nuts of the three brass screws on

both sides of the plastic rail.

• Tightening torque, M16: 80 Nm.

Retightening the screws on the Mecc Alte generator

• Tightening torque, M20: 100 Nm.

3. Fit the top hatch, then tighten the 8 screws.

Generator Stamford

Tightening torque for screw joint

Busbar

Number of

Thread

Torque

width

screw

(Nm)

(mm)

joints

25

2

M8

17

30

2

M8

17

40

2

M10

28

50

2

M12

45

60

4

M10

28

80

4

M12

45

100

5

M12

45

120

5

M12

45

Retightening the screws on the Stamford generator

51

Maintenance

Retightening connectors

Retighten all the connectors and cable connec-

tions in the central electric unit.

The illustration shows an example of a central electric unit

52

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