New Sensor Kit Is Now Used On Certain Cat® Products {1000, 1439, 1718, 1906, 1907, 1912, 1917, 1923, 1924, 1925, 1929, 7400, 7422} Caterpillar

Asphalt Paver

AP1000E (S/N: T1F1-UP)

AP1055E (S/N: TJF1-UP)

Engine (Captive)

C7.1 (S/N: 7701-UP)

Excavator

324E (S/N: KTE1-UP; TLF1-UP; LDG1-UP; PNW1-UP; JCZ1-UP)

329E (S/N: RLD1-UP; ZCD1-UP; WJK1-UP; TST1-UP; PLW1-UP; RDX1-UP)

Generator Set

C7.1 GEN SET (S/N: MRP1-UP)

Mobile Hydraulic Power Unit

329E MHPU (S/N: K2L1-UP; KNR1-UP)

Motor Grader

120M Series 2 (S/N: M921-UP; M9C1-UP; M9H1-UP; R9N1-UP; R9W1-UP)

Wheel Feller Buncher

2570C (S/N: W571-UP; F1B1-UP)

2670C (S/N: W671-UP; B3E1-UP)

563C (S/N: W631-UP; JCB1-UP)

573C (S/N: W731-UP; RJT1-UP)

Wheel Loader

950K (S/N: R4A1-UP; J5M1-UP; FER1-UP)

962K (S/N: T6A1-UP; FLL1-UP; X4T1-UP)

Description Of Change: A new Sensor Kit is now used on the machines that are listed above. Replace the existing sensor kit with the new sensor kit comprising of a new differential pressure sensor and the required hardware to assemble. This new sensor kit is an improvement over the previous part numbers.

Adaptable To: The new sensor kit comprising of the 385-1174 Pressure Sensor Gp is listed in Table 1.

Installation Instructions

1. Check that the components of the sensor kit are all present and in good condition. The list of components are listed in Table 2.
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   Table 2

   462-9022 Pressure Sensor Gp
   Qty	Part Number	Description
   1	385-1174	Pressure Sensor Gp
   1	422-3830	Sensor Harness As
   1	422-4876	Bracket
   2	8T-7547	Bolt
   3	217-9039	Cable Strap

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   Illustration 1	g06007308
   (1) NRS differential sensor (2) Sensor connection for engine harness (3) Head bolts (M8 x 20mm long flanged)

2. Remove the existing NRS differential pressure sensor (1) ( 352-2809 Pressure Sensor Gp and 397-2874 Pressure Sensor Gp) as follows:

   1. Unplug the engine electrical harness (2) from the sensor.

   2. Remove the two M8 x 20mm long flanged head bolts (3) and discard.

   3. Remove the sensor, complete with 2 off seals and discard.

   4. Clean and inspect the mating face of the NRS manifold onto which the sensor sits.

3. Assemble the new sensor kit as follows:

   1. Ensure that both seals are correctly seated in the grooves of the sensor and are still located when fitting the sensor to the engine.
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      Illustration 2	g06007309
      (4) 385-1174 Pressure Sensor Gp (5) 422-4876 Bracket (6) - Port (7) + Port (8) 8T-7547 Bolts

   2. Position the sensor (4) onto the NRS manifold, ensuring that the sensor electrical connector is positioned as shown in Illustration 2. The sensor body is marked with a "+" and "-". Ensure that the sensor is orientated correctly.

   3. Place the support bracket (5) onto the sensor as shown in Illustration 2.

   4. Assemble the sensor and support bracket onto the NRS manifold. Tighten the two off screws to a torque of 18 ± 2 N·m (13.3 ± 1.5 lb ft) using a 13mm AF socket as shown in Illustration 2.
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      Illustration 3	g06007310
      (9) 422-3830 Sensor Harness As (10) Red Latch

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      Illustration 4	g06007311
      (11) 217-9039 Cable Straps

   5. Plug one end of the sensor harness (9) into the sensor. Engage the red latch (10) to lock the sensor harness to the sensor as shown in Illustrations 3 and 4.
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      Illustration 5	g06007313

   6. Route the sensor harness as shown in Illustrations 4 and 5.

      Retain the sensor harness to the support bracket using three cable straps (11). Remove excessive length from the cable straps.

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      Illustration 6	g06007314
      (12) Engine Harness

   7. Plug the other end of the sensor harness into the engine harness (12). Engage the red latch on the engine harness to lock the sensor harness as shown in Illustration 6.

The new sensor kit is adaptable to and effective with the serial numbers that are listed in Table 3.