3054, 3054B and 3056 Marine Engines Installation Guide Caterpillar

Illustration 1	g00746254
Typical arrangement (1) Interconnecting cable (2) Auxiliary control panel (3) Connection to engine wiring harness (4) "Y" harness (5) Main control panel

Illustration 2	g00746256
(6) Location of the connection for the engine wiring harness

The electrical system contains the following options:

• Insulated ground

• Various lengths of extension harnesses

• "Y" harness for multiple connections to the control panel

• 12 V or 24 V operation

• Main control panels and auxiliary control panels

Engine Wiring Harness

The engine wiring harness connects the components of the electrical system to a waterproof connector.

Naturally Aspirated 3054B Marine Engine

Illustration 3	g00789466
Schematic for the naturally aspirated 3054B Marine engine

Turbocharged 3054 Marine Engine

Illustration 4	g00786915
Schematic for the turbocharged 3054 Marine engine

Naturally Aspirated 3056 Marine Engine and Turbocharged Aftercooled 3056 Marine Engine

Illustration 5	g00747900
Schematic for the 3056 Marine engine

Fuses

Note: Fuses protect the electrical system against short circuits. The risk of a short circuit is highest when the electrical system is being connected.

Illustration 6	g00746261
Typical arrangement Refer to Table 1 for a description of each fuse.

Table 1

Fuses for the 3054, 3054B and 3056 Marine Engines
Location	3054 Marine Engine and the 3054B Marine Engine	3056 Marine Engine
1	40 amp fuse for the starting motor	40 amp fuse for the starting motor
2	Empty	25 amp fuse for the air inlet heater (if equipped)
3	10 amp fuse for the control panel	25 amp fuse for the stop button
4	25 amp fuse for the negative battery cable	10 amp fuse for the control panel
5	Starting motor connection	Starting motor connection

The fuses for the 3054B Marine engine and the 3054 Marine engine are located above the starter motor on the left rear side of the engine. The fuses for the 3056 Marine engine are located above the starter motor on the right rear side of the engine.

Illustration 7	g00746263
Cutaway view of the typical location for the additional fuse on the 3056 Marine engine (6) Negative fuse (7) Belt guard

An additional fuse is located at the front of the engine behind the belt guard on the 3056 Marine engine. The fuse protects the engine wiring from damage. Do not connect the positive battery terminal to the cylinder block. Damage to the electrical system can be the result. The additional fuse is equipped on the 3056 Marine engine only.

Extension Harnesses

Illustration 8	g00746265
(1) Extension harness

Illustration 9	g00746274
(2) "Y" harness

Extension cables are needed to join the engine wiring harness to the control panels. The cables come in different lengths.

"Y" harnesses are available. If necessary, more than one "Y" harness may be used in order to connect several control panels.

Control Panels

Two control panels are available. Refer to Illustration 10 for the main control panel. Refer to Illustration 11 for the dimensions of the opening that is required for installation. A depth of 110 mm (4.33 inch) is required for the installation of the main control panel. Refer to Illustration 13 for the auxiliary control panel. Refer to Illustration 14 for the dimensions of the opening that is required for installation. A depth of 110 mm (4.33 inch) is required for the installation of the auxiliary control panel.

Illustration 10	g00746282
Layout of the main control panel (1) 250 mm (9.84 inch) (2) High water temperature indicator light (3) Water in fuel warning lamp (4) Panel illumination lamp (5) Warning lamp for the charging circuit (6) Voltmeter (7) Water temperature gauge (8) Low oil pressure lamp (9) 175 mm (6.90 inch) (10) Oil pressure gauge (11) Tachometer and hour meter (12) On/Off switch (13) Engine stop switch (14) "Heat/Start" switch

Illustration 11	g00746285
Cut out dimensions for the main control panel (15) 232 mm (9.13 inch) (16) 25 mm (0.98 inch) radius (17) 157 mm (6.18 inch)

Illustration 12	g00747902
Schematic for the main control panel

Illustration 13	g00746290
Layout of the auxiliary control panel (18) 180 mm (7.10 inch) (19) Tachometer and hour meter (20) Low oil pressure lamp (21) High coolant temperature lamp (22) Warning lamp for the charging circuit (23) On/Off switch (24) 140 mm (5.51 inch) (25) Engine stop switch (26) "Heat/Start" switch

Illustration 14	g00746291
Cut out dimensions for the auxiliary control panel (27) 164 mm (6.46 inch) (28) 124 mm (4.88 inch) (29) 15 mm (0.60 inch) (30) 15 mm (0.60 inch)

Illustration 15	g00747904
Schematic for the auxiliary control panel

Illustration 16	g00746289
The location of the connection for a main control panel and the location of the connection for the auxiliary control panel is located on the back of each panel. (31) This terminal is used to operate the control panel as an auxiliary control panel. (32) This terminal is used to operate the control panel as a main control panel. (33) Connector for the "auxiliary" position or the "main" position

All control panels are configured as a main control panel. More than one control panel can be used to control the engine. One control panel can be used as a main control panel and one control panel can be used as an auxiliary control panel. Refer to Illustration 16 for the location of the connection. To convert a control panel to an auxiliary control panel, remove the connector (33) from the main terminal (32). Connect the connector (33) to the "S" position (31). This is the position for the auxiliary control panel.

One control panel must always be the main control panel and one control panel must be the auxiliary control panel. If more than two control panels are installed, one control panel will be the main control panel. The other control panels will be auxiliary control panels.

Configuration of the Main Control Panel

No more than three control panels may be used at the same time. There are five different configurations. The control panels that are listed as auxiliary control panels must be configured as an auxiliary.

Illustration 17	g00746766
(34) Auxiliary control panel (35) Main control panel

Illustration 18	g00746768
(36) Auxiliary control panel (37) Main control panel

Illustration 19	g00746770
(38) Auxiliary control panel (39) Main control panel

Illustration 20	g00746771
(40) Auxiliary control panel (41) Auxiliary control panel (42) Main control panel

Illustration 21	g00746772
(43) Auxiliary control panel (44) Auxiliary control panel (45) Main control panel

Tachometer Calibration

Before the tachometer can be adjusted, the correct setting must be calculated. The procedure and the formula for calculating the correct setting for the tachometer follows:

1. Measure the diameter of the alternator driven pulley.

2. Measure the diameter of the alternator drive pulley.

3. Divide the measurement for the alternator driven pulley into the measurement for the alternator drive pulley.

4. Multiply the result by 6. This is the number of pulses that are required for the correct setting for the tachometer.

If the tachometer needs to be recalibrated, then use the following procedure:

1. Ensure that the panel is installed correctly.

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Illustration 22	g00754932
The button is located on the back of the tachometer. (1) Typical example of a probe (2) Button

2. Insert a probe (1) into the rear of the tachometer. Refer to Illustration 22. Lightly press the button (2) with the probe (1). At the same time, turn the control panel to the ON position.

3. Press the button (2) with the probe (1). Observe the LCD readout on the control panel. When the word "PULSE" is displayed, release the probe (1) from the button (2) .

4. The current setting for the tachometer will now be visible and the digits will flash. The flashing digit can now be adjusted. Adjust the flashing digit by depressing the button with the probe. The numbers will scroll until the correct digit is reached. Repeat the procedure for all of the digits, as required.

5. The LCD readout will revert to the display for the service hour meter. Turn the control panel OFF.

Zinc Anode Bonding System

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NOTICE
The engine may be damaged by electrolytic corrosion if the correct zinc anode bonding system is not used. Read and follow the guidelines for the zinc anode bonding system carefully.

Illustration 23	g00746295
Typical arrangement of two 3056 Marine engines (1) Metal fittings that go through the hull (2) Typical example of the wiring for the zinc anode bonding system (3) Engine ground stud connection (4) Ground stud connection for the propeller shaft (5) Propeller shaft (6) Zinc anode (7) Engine (8) Valve for the sea water

Illustration 24	g00754812
Typical location of the stud for the zinc anode bonding system

Corrosion in the engine cooling system can be reduced by connecting the engine to a zinc anode. The zinc anode is used to protect metal fittings and other metal components that are in direct contact with sea water. The engine is equipped with a stud that may be used for this purpose. The stud will be identified with a label.

The zinc anode bonding system should provide a connection that has low resistance between all of the metals that are in contact with sea water. The zinc anode should be fixed to the outside of the hull below the level of the sea water.

The bonding should use a heavy stranded wire with a tin coating. The wire should also be insulated.

Table 2

Type of Cable That is Needed for the Zinc Anode Bonding System
Length of Run To Zinc Anode	Suggested Size of the Cable
Up to 9 m (30 ft)	7 strand 0.85 mm (0.034 inch) 4 mm2 (0.1575 inch2)
9 to 12 m (30 to 40 ft)	7 strand 1.04 mm (0.041 inch) 6 mm2 (0.2362 inch2)

Solder the connections for the zinc anode bonding system. The connection should also be protected with a neoprene paint.

It is important to include the propeller shaft in the zinc anode bonding system. The electrical connection to the propeller shaft can be made with brush terminals made of graphite.

Note: Before the vessel is used, the zinc anode bonding system should be tested.