Improved Indicator Lamp Group is Now Used on Certain 988K Wheel Loaders {1408, 7450, 7540, 7857} Caterpillar

Improved Indicator Lamp Group is Now Used on Certain 988K Wheel Loaders {1408, 7450, 7540, 7857}

Usage:

988K LWX

Wheel Loader: 988K (S/N: LWX694-UP; TWX933-UP)

Description Of Change: Improved indicator lamp group is now used on certain machines that are listed above. The new indicator lamp group will have improved service life.

Adaptable To: The 340-4391 Indicator Lamp has been replaced with the 419-3911 Indicator Lamp Gp in 347-5082 Autolube Control Wiring Gp.

The new part number is listed in Table 1.

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Table 1
Item	Quantity	New Part Number	Part Name	Former Part Number
1	1	419-3911	Indicator Lamp Gp	340-4391

The improved lamp group is adaptable and effective with serial numbers that are listed in Table 2.

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Table 2
Sales Model	Adaptable Serial Numbers	Effective Serial Numbers
988K	S/N:LWX1-693	S/N:LWX694-UP
988K	S/N:TWX1-932	S/N:TWX933-UP

Rework Procedure

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Shock/Electrocution Hazard! Do not work on this equipment unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in serious injury or death.

Note: Turn off the engine at the start switch and attach a Lock out Tag out to the controls of the machine.

Turn the battery disconnect switch to the OFF switch.

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Table 3
Required Parts List
Qty	Part Number	Part Name
1	492-9156	Plate
1	419-3911	Indicator Lamp Gp
1	486-2269	Film
1	492-9064	Control Harness As
5	204-2281	Cable Strap
6	7K-1181	Cable Strap

Use the following rework procedure to replace the indicator lamp group:

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Illustration 1	g06050438
(A) 458-4108 Control Harness As (B) 340-4391 Indicator Lamp (C) 424-6434 Plate

Remove the existing harness assembly (A), Indicator lamp (B), and the plate (C).
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Illustration 2 g06047285
Install the 492-9156 Plate (1) on the mounting block.
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Illustration 3 g06047293

(2) 419-3911 Indicator Lamp Gp

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Illustration 4 g06047316

(3) Grommet
Disassemble grommet (3) from light; assemble light into plate (1) and then Re-assemble the grommet into indicator lamp.
Install 492-9064 Control Harness As using 7K-1181 Cable Strap and 204-2281 Cable Strap.
Plug 102-8802 Receptacle Kit of Indicator Lamp Gp (2) into the 155-2269 Connector Plug As on the harness assembly and secure into 130-5300 Clip.
Use 7K-1181 Cable Strap to bundle excess pigtail from the lamp.
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Illustration 5 g06050452

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Illustration 6 g06050466

486-2269 Film
Install 486-2269 Film (4) to the indicator lamp.

Rework Procedure(Alternate Configuration)

Perform the following procedure to rework on the existing harness assembly:

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Table 4
Qty	Part Number	Part Name
1	155-2270	Connecting Plug Kit

Unplug connector from the indicator lamp group.
Remove the existing 3 position 155-2267 Connector Plug As from the 458-4108 Control Harness As. Remove 155-2276 Plug Lock Wedge from end of plug.
Remove the wires from the connector.
Install the 2 pin 155-2270 Connecting Plug Kit onto the 458-4108 Control Harness As.
Insert circuit F464-RL5-PU(Purple)into Position 1.
Insert circuit A273-RL6-BK(Black)into Position 2.
Cut the terminal of circuit 103-RL10-YL(Yellow)and secure to harness assembly using electrical tape.