Operation and Maintenance Instructions for 371-1681 Water Separator and Fuel Filter Gp and 424-0783 Water Separator and Fuel Filter Gp {1261, 1263} Caterpillar

Engine:

C175-16 (S/N: M6B1-UP; P6L1-UP)

Introduction

This Special Instruction is intended to acquaint the user with the structure, maintenance, and safe use of the 371-1681 Water Separator and Fuel Filter Gp and 424-0783 Water Separator and Fuel Filter Gp . The Special Instruction provides instruction for operation and maintenance personnel. Through correct use and maintenance the system can be kept in trouble-free, effective, and economic working condition over the entire life span.

Note: The 371-1681 Water Separator and Fuel Filter Gp is equipped with Water In Fuel (WIF) sensors, however the 424-0783 Water Separator and Fuel Filter Gp does not come equipped with Water In Fuel (WIF) sensors.

Safety Section

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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.

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Do not operate or work on this machine or work tool unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals and Owner's Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Caterpillar dealer for replacement manuals. Proper care is your responsibility.

Technical Specifications

Illustration 1	g03391433
371-1681 Water Separator and Fuel Filter Gp

Main Components

Illustration 2	g03391467
(1) Filter housing (2) Filter bowl (3) Clamp (4) Filter element (5) Valve spool (6) Spool locator (7) Spool handle (8) Venting valve (9) Air exhaust port (10) Filling connection (11) Water/oil drain valve (12) Water in Fuel Sensor (if equipped)

Description of Operation

Illustration 3	g03391480

Diesel fuel enters the filter through the inlet connection into the valve. The valve directs the flow to one of the two reservoirs, according to the user set position. Diesel fuel flows from the outside through the filter element collecting dirt particles, into the water separation element separating water from the diesel fuel. The diesel fuel exits the filter through the outlet connection. Dirt particles are trapped in the filter while water settles in the bottom of the filter bowl.

Transportation and Installation of the 371-1681 Water Separator and Fuel Filter Gp and 424-0783 Water Separator and Fuel Filter Gp

Transportation and Storage

Use the following guidelines for transportation and storage:

• Keep the device away from excessive temperature variations and corrosive chemicals

• Keep the device and accessories dry

• The device must be kept safe from mechanical effects, hits, excessive static loads, and the transportation must be performed without deforming or damaging the device/packaging

• The device/packaging must be secured in a fixed position and should not be transported together with sharp objects

Installation of the Filter Base

When installing the system, pay special attention to the following:

• Installation base shall be level and even

• Supporting bracket or piping may cause stresses on the filter (twisting, pulling, etc.)

• Sufficient space is available for installation work

• Uncoupled accessories like sensors, gauges, etc. are properly connected

• All screws and connections are properly tightened

Illustration 4	g03391496

Illustration 5	g03391498

Illustration 6	g03391500

Installation of the Fuel Lines

The 424-0783 Water Separator and Fuel Filter Gp and 371-1681 Water Separator and Fuel Filter Gp are each supplied with two M33 STOR ports for the fuel inlet and fuel outlet. 227-0065 Connectors are recommended to connect flexible hoses to the filter base. Refer to Application and Installation, LEBW4976, "Diesel Fuels & Diesel Fuel Systems" regarding fuel line sizing, routing, and connections to the filters.

Water in Fuel Sensors

The 424-0783 Water Separator and Fuel Filter Gp is supplied without water in fuel monitoring capabilities. Water in Fuel monitoring capabilities can be added by using 422-7142 Electronic Panel Gp , 422-8822 Wiring Harness, and 377-1125 Sensor Kit .

The Water In Fuel (WIF) sensors are used to signal the presence of water in the primary fuel filters. The electronic panel group is equipped with a light for easy water in fuel identification. Also, the electronic panel group is equipped with a set of contacts that can be wired into an off engine alarm panel.

Installation of the 422-7142 Electronic Panel Gp

Illustration 7	g03396464
Connect the auxiliary warning panel to either relay contacts, Normally Open or Normally Closed, and Common.

Refer to Illustration 7 for the proper wiring configuration of the 422-7142 Electronic Panel Gp .

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Illustration 8	g03397481
(1) 422-8822 Wiring Harness (2) 422-7142 Electronic Panel Gp

1. Mount the 422-7142 Electronic Panel Gp in a suitable location, considering the length of the 422-8822 Wiring Harness .

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Illustration 9	g03397482

2. Connect the 422-8822 Wiring Harness to the 422-7142 Electronic Panel Gp and Water in Fuel sensors.

3. Connect 24 VDC power to the terminal blocks marked 24+ and 24- inside the 422-7142 Electronic Panel Gp .

4. Connect the Machinery Space Alarm panel or other auxiliary warning panel using the Normally Open (NO) or Normally Closed (NC) relay contacts and Common (COMM).

System Use

Note: Before using the filter, make sure that the filter bowls are properly closed and all connections tightly fastened. Do not exceed specified pressure limits. Check the differential pressure over the filter at regular intervals.

In normal operation one chamber is filtering and the other chamber is on idle. It is also possible to use both chambers for filtering. In this case the spool should be in the middle position (the arrow head of the handle pointing downwards).

Note: Pressure measuring connections in the filter housing above the spool ARE NOT WORKING in the middle position. If the middle position will be used, the filter pressure drop will have to be carried out by the means of external indication devices.

Changing the Filtering / Idling Chamber

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Illustration 10	g03391517

1. Chamber B is filtering according the text in front of the handle. Pull the spool locator knob to release the spool for turning. Start turning the spool slowly using the handle.

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Illustration 11	g03391519

2. After 1/4 rotation (90°) the spool may stop in the middle position. Release the spool again by pulling the knob and keep turning the spool.

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Illustration 12	g03391524

3. When the spool has been fully turned (180°), make sure that the spool locator locks the valve spool. Chamber A is filtering according to the marking in front of the spool.

Maintenance of the System

Replacing the Filter Elements

Illustration 13	g03391619

1. Make sure that the spool is position that the chamber to be serviced is idling. Turn the spool if needed.

2. Open the venting valve carefully.

3. Drain the filter housing by opening the draining valve.

4. Loosen the screws and turn the clamp.

5. Take off the filter bowl and the filter element.

6. Assemble the filter in reverse order. Make sure that the filter element is right way around and the o-ring seal is in its place. Put the element in to the bowls and lift the bowl/bowl clamp up. Tighten the screws evenly, max half round of each bolt at a time. Tightening torque 40 N·m (29.5 lb ft).

7. On suction side, connect the filling pump to filling connection. Open the vent valve and fill the chamber. When fluid comes out from the venting pipe, close the vent valve. On pressure side installation, turn the spool slightly (30°). Open vent valve carefully. When fluid comes out from the venting pipe, close vent valve. Return the spool to the locked position.

Replacing the Filter Spool Sealing

Illustration 14	g03391620

1. Open the venting valves carefully to make sure that the system is pressureless.

2. Filter can be drained from the bottom to minimize oil leakage from the housing when the spool has been removed.

3. Remove the spool locator from handle. It is not necessary to detach the handle.

4. Remove the spool holder.

5. Remove the spool with sealing.

6. Change the sealing.

7. Assemble the filter in reverse order.

Spare Parts List