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D-4

 

 

D-4

 

 

 

 

MAINTENANCE

 

FUEL FILTERS:

7.

Re-insert the large white volume plug into the

 

 

 

 

 

 

upper cavity.

 

 

 

WARNING

 

 

 

 

 

 

8.

Place the O-ring onto the angled seal surface of

 

 

 

 

 

 

When working on the fuel system:

 

 

the filter header and re-install the plastic cap. Make

 

 

• Keep unshielded lights away, do not

sure its flange rests on the O-ring.

 

 

 

 

 

smoke !

9.

Screw on the cap ring and tighten hand tight.

 

 

• Do not spill fuel !

 

10. Remember to open the fuel shutoff valve (Lever in

 

 

 

 

 

line with the hose) before starting the engine.

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The Commander 400 is equipped with a Fuel Pre- Filter/Water Separator Assembly located before the lift pump and a Secondary Fuel Filter located after the lift pump and before the fuel injectors. The Fuel Pre- Filter/Water Separator is mounted to the engine block just below the lift pump (Figure D.2). The Secondary Fuel Filter is mounted directly to the engine just above the oil filter (Figure D.3).

Fuel Pre-Filter/Water Separator Assembly: The pre- filter is a 150 micron screen designed to protect against gross fuel contamination of the water separator ele- ment and the Secondary Fuel Filter. If the pre-filter becomes plugged, it may be removed, inspected, cleaned and reinstalled. In general this only needs to be done with each water separator element change (about every 1,000 hrs). However, if at any time exces- sive fuel contamination is suspected or a sudden fall- off in engine performance is detected the pre-filter screen should be inspected and cleaned. See Figure

D.2 and follow this procedure:

1.Close the fuel shutoff valve located on the side of the Fuel Pre-Filter/Water Separator Assembly. The lever should be perpendicular to the hose

2.Unscrew the cap ring located on the top of the filter header and remove the plastic center cap and O- ring.

3.Remove the large white volume plug located direct- ly under the center cap in the upper cavity of the fil- ter header. Use a small screwdriver (or similar device) to lift the plug part way out of the cavity to assist with its removal.

NOTE: Be careful not to damage the pre-filter screen with the tool used to remove the plug.

4. Using a pair of pliers, gently tug on the pull tabs of the pre-filter screen in an alternating pattern to gradually remove the pre-filter screen.

5.Brush off any debris and rinse in diesel fuel.

6.Re-install the pre-filter screen into the upper cavity of the filter header making sure the four pull tabs are pointing up. Putting your fingers on the pull tabs, push down evenly until the lower body of the pre-fil- ter screen contacts the floor of the upper cavity.

Water Separator Element: The water separator ele- ment is a two-stage filter with a special filtration/water separating media. An expanded water reservoir pro- vides maximum protection against water in the fuel. The recommended change interval for the water sepa- rator element is 1,000 hours. See Figure D.2 and fol- low this procedure.

1.Close the fuel shutoff valve located on the side of the Fuel Pre-Filter/Water Separator Assembly. The lever should be perpendicular to the hose.

2.Rotate the quick change ring (located just below fil- ter header) clockwise approximately 1/2 turn and slide it down and off the element.

3.Grasp the element and pull down with a slight rock- ing motion to remove the element from the grommet post on the bottom of the filter header.

FIGURE D.2 – FUEL PRE-FILTER/WATER

SEPARATOR ASSEMBLY

FUEL

FILTER

QUICK

CAP

SHUTOFF

HEADER

CHANGE

RING

VALVE

 

RING

 

COMMANDER 400

Page 39 Page 41
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Image 40
Lincoln Electric SVM133-B service manual Fuel Filters, Figure D.2 Fuel PRE-FILTER/WATER Separator Assembly
Page 39 Page 41

SVM133-B specifications

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