Replacement of the 124-4672 Pressure Sensor for the Payload Control System {1439, 7494} Caterpillar

Wheel Loader:

928G (S/N: 6XR1-UP)

938F (S/N: 1KM1-UP)

938G (S/N: 4YS1-UP)

938G Series II (S/N: CRD1-UP)

950F Series II (S/N: 5SK1-UP)

950G (S/N: 4BS1-UP; 3JW1-UP)

950G Series II (S/N: AXR1-UP; AXX1-UP)

962G (S/N: 5AS1-UP; 4PW1-UP)

962G Series II (S/N: AXS1-UP; AXY1-UP)

966F (S/N: 4YG1-UP)

966F Series II (S/N: 1SL818-UP)

966G (S/N: 3ZS1-UP; 3SW1-UP)

966G Series II (S/N: ANT1-UP; ANZ1-UP)

966H (S/N: A6D1-UP)

970F (S/N: 7SK1-UP)

972G (S/N: 7LS1-UP; 4WW1-UP)

972G Series II (S/N: AWP1-UP; ANY1-UP)

972H (S/N: A7D1-UP)

980F (S/N: 8CJ681-UP)

980F Series II (S/N: 8JN1-UP)

980G (S/N: 2KR1-UP)

980G Series II (S/N: AWH1-UP)

980H (S/N: JMS1-UP)

988F (S/N: 8YG1-UP)

988F Series II (S/N: 2ZR1-UP)

988G (S/N: BNH1-UP; 2TW1-UP)

988H (S/N: BXY1-UP)

990 (S/N: 7HK1-UP)

990 Series II (S/N: 4FR1-UP; BCR1-UP)

Introduction

Information that is contained in this publication is for the service replacement of the pressure sensor for the payload control systems:

This supplemental product support literature should be used with the appropriate Service Manual that is available for the standard machine.

Do not perform any procedure and do not order parts that are outlined in this publication until you understand the information that is contained in this document.

ReferenceSYSTEMS OPERATION, TROUBLESHOOTING, TESTING AND ADJUSTING, SENR6614, "PAYLOAD CONTROL SYSTEM (PCS)"

ReferenceCD, SERV7019, "OPERATION AND SERVICE - MULTIMEDIA TRAINING PROGRAM"

The 302-5668 Pressure Sensor (Kit)

Illustration 1	g01374688
302-5668 Pressure Sensor Group

• One 3J-1907 O-Ring Seal (1)

• One 221-3416 Pressure Sensor Gp (2)

• One 265-2834 Block (3)

• Two 8T-4223 Hard Washers (4)

• Two 8T-4648 Bolts (5)

• Two 8T-4910 Bolts (6)

• Two 6L-5551 Bolts (7)

• One 102-8803 Receptacle Kit (8)

• Three 186-3735 Connector Pins (9)

Replacement of the Pressure Sensor for the Payload Control System

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Illustration 2	g01374790
View of connectors (A) Connector

1. Remove the male connector (A) from the 221-3416 Pressure Sensor Gp . Use the wiring table and install the following parts:
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   Table 1

   WIRING TABLE
   SOCKET	CIRCUIT	WIRE COLOR
   A	VS	GN
   B	GROUND	BR
   C	SIGNAL	WH

   • One 102-8803 Receptacle Kit (8)

   • Three 186-3735 Connector Pins (9)

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Illustration 3	g01356679
View of the 928G with old sensor and with new sensor

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Illustration 4	g01356346
View of the 938F, the 938G and the 938G Series II with old sensor and with new sensor

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Illustration 5	g01356323
View of the 950F through the 970F with old sensor and with new sensor

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Illustration 6	g01356357
View of the 950G, 950G Series II, 962G and the 962G Series II with old sensor and with new sensor

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Illustration 7	g01341799
View of the 966G, 966G Series II, 972G and the 972G Series II with old sensor and with new sensor

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Illustration 8	g01377658
View of the 966H and the 972H with old sensor and with new sensor

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Illustration 9	g01379586
View of the 980F and the 980F Series II with old sensor and with new sensor

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Illustration 10	g01356426
View of the 980G, and the 980GII with old sensor and with new sensor

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Illustration 11	g01376017
View of the 988F and the 988F Series II with old sensor and with new sensor

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Illustration 12	g01380750
View of the 988G with old sensor and with new sensor

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Illustration 13	g01376019
View of the 988H with old sensor and with new sensor

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Illustration 14	g01376020
View of the 990 and the 990 Series II with old sensor and with new sensor

2. Check Illustration 3 through Illustration 14 for your machine model.

3. Remove the Old pressure sensor.

4. Use the following hardware and mount the 265-2834 Block (3) onto the original bracket:

   Note: Mount the sensor in a vertical position ± 90 degrees. Mount the sensor with the port facing downward.

   • Two 8T-4223 Hard Washer (4)

   • Two 8T-4648 Bolts (5)

   • Two 8T-4910 Bolts (6)

   • Two 6L-1596 Bolts (6)

5. Use the 3J-1907 O-Ring Seal (1) and install the 221-3416 Pressure Sensor Gp (2) .

6. Connect the power lead for the 221-3416 Pressure Sensor Gp (2) onto the original plug.

7. Reconnect the original hoses and fittings.

8. Purge the air from the circuit when installation is complete.

Recalibrate the Payload Control System

1. Refer to SYSTEMS OPERATION, TROUBLESHOOTING, TESTING AND ADJUSTING, SENR6614, "PAYLOAD CONTROL SYSTEM (PCS)" for the calibration procedure.