V-Belt; Oil Change With Filter; Changing The Fuel Filter; Changing The Fuel Filter, Ju4H And Ju6H - Grundfos Fire NKF Montage- Und Betriebsanleitung

9.3.6 V-belt

Check the V-belt and belt pulleys for wear. In addition, check the
V-belt tension.
The V-belts must be stretched according to
Caution regulations, to ensure an optimal functioning of
the pump and electric generator.
The V-belt elasticity midway between the two V-belt pulleys must
be 1 to 1,5 cm. See arrow in fig. 37. The V-belt tension can be
increased by loosening both generator fixing screws (fig. 37,
pos. A) and pushing the generator outwards (fig. 37, pos. B).
Then refasten the screws.
Worn V-belts must be replaced. See section 9.7 Replacing the
V-belt.

9.4 Oil change with filter

The oil must be changed once a year. For filling quantities,
see section 4.4.3 Engine.
1. Start the engine and let it run until it reaches operating
temperature. See section 7.2 Manual operation.
2. Use button S3 to switch off the engine.
3. Connect the oil drain tube to the oil drain pump (fig. 31,
pos. 27). Insert the end of the oil drain tube into a suitable
container. Operate the hand pump to drain the oil. Dispose of
used oil according to regulations.
4. Put a container under the oil filter and loosen the oil filter
(fig. 31, pos. 28) with, for example, a steel strap wrench.
Dispose of used oil filter according to regulations.
5. Clean oil filter receptacle.
6. Fill new oil filter with engine oil.
7. Screw in new oil filter and tighten by hand. Do not use tools!
8. Unscrew the oil filler cap (fig. 31, pos. 30) and fill engine oil up
to the corresponding mark on the oil dipstick.
9. Start the engine and let it run as described in section
7.2 Manual operation. After switching off the engine and
letting it cool down, measure the oil level and refill, if
necessary.
Fig. 31 Oil drain pump, oil filter, engine oil filling hole
Only use prescribed engine oil.
Caution
See section 4.4.3 Engine.
Figure 31 shows the engine series JU4H and JU6H. The
arrangement in engines of series JW6H can be seen in figs 7
and 8.
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9.5 Changing the fuel filter

The fuel filter should be changed once a year.

9.5.1 Changing the fuel filter, JU4H and JU6H

Fig. 32 Fuel filter, JU4H and JU6H
1. Close the fuel tap (fig. 5, pos. 7).
2. Loosen the drain screw in the water collector (fig. 32, pos. A)
and collect the fuel in a suitable container. Dispose of the fuel
in an environmentally sound way.
3. Turn the retaining ring of the filter housing (fig. 32, pos. B)
anti-clockwise by a quarter of a turn and remove it. Hold the
retaining ring up whilst turning to overcome the blocking
mechanism. Then pull the fuel filter downwards.
4. Check the filter holder for dirt, and clean if necessary.
5. Insert a new fuel filter into the filter holder. Ensure that the
blocking mechanism fits exactly into the grooves on the filter
holder. If necessary, move the filter element gently from side-
to-side to ensure a correct positioning.
6. Screw the retaining ring back onto the filter holder, making
sure that the dust seal fits properly in the holder. Tighten the
retaining ring by hand until you hear and feel it click into place
(approx. 1/3 of a turn). Do not over-tighten the retaining ring!
7. Open the fuel tap (fig. 5, pos. 7) and vent the fuel system.
See next section.
Venting the fuel system
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Warning
Fuel expelled under pressure can penetrate the
skin and cause serious injuries. The pressure
must therefore always be released before the fuel
pipes are disconnected. Only re-pressurize once
all the pipes have been tightened securely.
1. Loosen the ventilation port (fig. 32, pos. C) on the filter holder
and turn two turns by hand.
2. Operate the lever of the fuel suction pump (fig. 32, pos. 20)
until the emergent diesel fuel at the ventilation port does not
contain air bubbles. Collect the fuel in a suitable container and
dispose of it in an environmentally sound way.
3. Carefully tighten the ventilation port. Keep operating the lever
of the fuel suction pump until no resistance is felt. Then push
the handle as far as possible in the direction of the cylinder
block.
4. Start the engine by pressing button S1 on the control panel
and check for leaks. Then press button S3 to switch the
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engine off again.
If the engine does not start, the fuel system may also need to be
vented at the fuel injection pump. The procedure is as follows:
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1. Loosen the connector (fig. 33, pos. A) at the fuel backflow
pipe.
2. Operate the lever of the fuel suction pump (fig. 32, pos. 20)
until the diesel fuel emerging at the connector does not
contain air bubbles. Collect the fuel in a suitable container and
dispose of it according to regulations.
3. Tighten the connector with 16 Nm.
4. Then press the handle as far as possible in the direction of the
cylinder block.
C
B
20
16
A