2014/12/18 Caterpillar

Articulated Truck:

735B (S/N: T4P1-UP)

740B (S/N: T4R1-UP; E4S1-UP)

740B EJECTOR (S/N: T4S1-UP)

Excavator:

336E (S/N: RZA1-UP; KED1-UP; YCE1-UP; TEG1-UP; FJH1-UP; GTJ1-UP; JRJ1-UP; SSL1-UP; YEP1-UP; CMR1-UP; BZY1-UP; TMZ1-UP)

349E (S/N: FJB1-UP; DGE1-UP; SPG1-UP; TFG1-UP; RGH1-UP; KCN1-UP; MZW1-UP; KFX1-UP; MPZ1-UP; WHZ1-UP)

Motor Grader:

12MSeries 2 (S/N: F9B1-UP; F9M1-UP; R9P1-UP; R9S1-UP)

140MSeries 2 (S/N: M9D1-UP; R9G1-UP; M9J1-UP; R9M1-UP)

160MSeries 2 (S/N: M9E1-UP; M9K1-UP; R9L1-UP; R9T1-UP)

Mobile Hydraulic Power Unit:

336E MHPU (S/N: PCE1-UP; RBS1-UP; DSZ1-UP; T3Z1-UP)

349E MHPU (S/N: JAE1-UP; S3P1-UP)

Track-Type Tractor:

D6T (S/N: KSB1-UP; ZJB1-UP; JZC1-UP; DTD1-UP; EJJ1-UP; SLJ1-UP; GMK1-UP; RRK1-UP; TSM1-UP; WLM1-UP; PLR1-UP; JRW1-UP; RCW1-UP)

D7E (S/N: TJA1-UP; TAN1-UP)

D8T (S/N: MLN1-UP; FCT1-UP)

Wheel Loader:

966K (S/N: PBG1-UP; TFS1-UP; NGX1-UP)

972K (S/N: PEM1-UP; Z4W1-UP)

980K (S/N: W7K1-UP; GTZ1-UP)

Wheel Tractor-Scraper:

621H (S/N: DBK1-UP; HKK1-UP)

623H (S/N: DBF1-UP)

627H (S/N: DBW1-UP)

Service Magazine SEPD1901, 11 December 2014, "A New Check Valve and Pressure Sensors Are Used on Certain Tier 4 Interim Machine Engines". Disregard the previous article, the serial number effectivity has been updated.

Description of Change: The new check valve with an improved spring to prevent relaxation and pressure loss. The new fuel pressure sensors do not have a dampening orifice, which eliminates pressure from becoming trapped in the sensor element area.

Adaptable To: The new check valve and pressure sensors replace the former valve and sensors. The new parts are adaptable back to first production on the serial numbers listed above. Refer to Table 1 for a list of the new and former part numbers.

Table 1

New Part Number	Former Part Number
284-2728 Pressure Sensor Gp	320-3064 Pressure Sensor Gp
298-6488 Pressure Sensor Gp	320-3065 Pressure Sensor Gp
445-9452 Check Valve Gp	327-8044 Check Valve Gp

This change is effective on the serial numbers listed in Table 2 and Table 3.

Table 2

Pressure Sensors Effective Engine Serial Numbers

S/N:MME11241-UP

S/N:MYE08978-UP

S/N:M4X00562-UP

S/N:TXM05968-UP

S/N:L4X00576-UP

S/N:TXL04300-UP

Table 3

Check Valve Effective Engine Serial Numbers

S/N:MME11241-UP

S/N:MYE11951-UP

S/N:M4X00562-UP

S/N:TXM06406-UP

S/N:L4X00576-UP

S/N:TXL05378-UP