2014/08/21 A New Pressure Switch is Now Available {3004, 3004, 3067, 3067} Caterpillar

Articulated Truck:

735B (S/N: L4D1-UP; T4P1-UP; E4R1-UP)

740B (S/N: L4E1-UP; GLH1-UP; T4R1-UP; E4S1-UP)

740B EJECTOR (S/N: L4F1-UP; T4S1-UP)

Landfill Compactor:

836H (S/N: BXD1-UP)

Off-Highway Truck/Tractor:

777G (S/N: T5A1-UP; TNM1-UP; RDR1-UP; T4Y1-UP)

789D (S/N: SPD1-UP)

Quarry Truck:

773G (S/N: MWH1-UP; JWS1-UP; T5S1-UP; T5T1-UP)

775G (S/N: T5F1-UP; RFM1-UP; MJS1-UP; T5W1-UP)

Track-Type Tractor:

D11T (S/N: AMA1-UP; MDG1-UP; JEL1-UP; JNS1-UP)

D6N (S/N: PBA1-UP; PER1-UP)

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

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

Wheel Dozer:

834H (S/N: BTX1-UP)

Wheel Loader:

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

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

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

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

980K (S/N: W7K1-UP; NEP1-UP; GTZ1-UP)

988H (S/N: A7A1-UP; BXY1-UP)

Wheel Tractor-Scraper:

621H (S/N: DBK1-UP)

621K (S/N: WTA1-UP; WTL1-UP)

623H (S/N: DBF1-UP)

623K (S/N: WTB1-UP; WTM1-UP)

627H (S/N: DBW1-UP)

627K (S/N: WTC1-UP; WTN1-UP)

Description of Change: A new Pressure Switch is now available for the listed machines. This new switch will resolve the issues of incorrectly indicating by-pass that were experienced with the former switch.

Adaptable To: The new Pressure Switch has been thoroughly tested and passed all lab and field tests.

The new 440-0257 Pressure Switch Gp (1) is a direct replacement for the former 341-6644 Pressure Switch.

Illustration 1	g03715300
(1) 440-0257 Pressure Switch Gp

Illustration 2	g03715302
Former 341-6644 Pressure Switch

Table 1

Required Parts
Item	Qty	New Part Number	Description	Former Part Number
1	1	440-0257	Pressure Switch Gp	341-6644

The new Pressure Switch is adaptable to the following machines:

• 621H (S/N: DBK1-131)

• 621K (S/N: WTA1-108)

• 621K (S/N: WTL1-105)

• 623H (S/N: DBF1-175)

• 623K (S/N: WTB1-123)

• 623K (S/N: WTM1-105)

• 627H (S/N: DBW1-348)

• 627K (S/N: WTC1-140)

• 627K (S/N: WTN1-103)

• 735B (S/N: L4D1-455)

• 735B (S/N: T4P1-458)

• 735B OEM (S/N: E4R1-1)

• 740B (S/N: L4E1-7784)

• 740B (S/N: T4R1-2736)

• 740B EJ (S/N: L4F1-499)

• 740B EJ (S/N: T4S1-375)

• 740B OEM (S/N: E4S1-136)

• 740B OEM (S/N: GLH1-143)

• 773G (S/N: JWS1-292)

• 773G (S/N: MWH1-359)

• 773G OEM (S/N: T5S1-123)

• 773G OEM (S/N: T5T1-103)

• 775G (S/N: T5F1-426)

• 775G (S/N: RFM1-719)

• 775G OEM (S/N: T5F1-102)

• 775G OEM (S/N: T5W1-110)

• 777G (S/N: RDR1-309)

• 777G (S/N: TNM1-794)

• 777G OEM (S/N: T4Y1-197)

• 777G OEM (S/N: T5A1-118)

• 789D (S/N: SPD1-646)

• 834H (S/N: BTX1-1316)

• 836H (S/N: BXD4-1255)

• 950K (S/N: FER1-3756)

• 950K (S/N: J5M1-1152)

• 950K (S/N: R4A1-2770)

• 962K (S/N: FLL1-379)

• 962K (S/N: T6A1-1059)

• 962K (S/N: X4T1-482)

• 966K (S/N: PBG1-10001)

• 966K (S/N: TFS1-1319)

• 966K XE (S/N: NGX1-441)

• 972K (S/N: PEM1-947)

• 972K (S/N: Z4W1-725)

• 980K (S/N: GTZ1-9002)

• 980K (S/N: W7K1-2460)

• 980K OEM (S/N: NEP1-114)

• 988H (S/N: A7A1-271)

• 988H (S/N: BXY1-5627)

• D11T (S/N: AMA1-533)

• D11T (S/N: JEL1-355)

• D11T (S/N: JNS1-134)

• D11T (S/N: MDG1-176)

• D6N LPG (S/N: PBA1-2041)

• D6N XL (S/N: PER1-741)

• D6T LGP (S/N: JRW1-561)

• D6T LGP (S/N: ZJB1-1676)

• D6T LGP PAT (S/N: EJJ1-313)

• D6T LGP PAT (S/N: KSB1-2018)

• D6T XL (S/N: GMK1-1640)

• D6T XL (S/N: TSM1-388)

• D6T XL PAT (S/N: DTD1-1302)

• D6T XL PAT (S/N: JZC1-306)

• D6T XW (S/N: SLJ1-1274)

• D6T XW (S/N: WLM1-305)

• D6T XW PAT (S/N: RCW1-1586)

• D6T XW PAT (S/N: RRK1-305)

• D8T (S/N: FCT1-1519)

• D8T (S/N: MLN1-1993)

The new Pressure Switch is effective in production in the following machines:

• 621H (S/N: DBK132-UP)

• 621K (S/N: WTA109-UP)

• 621K (S/N: WTL106-UP)

• 623H (S/N: DBF176-UP)

• 623K (S/N: WTB124-UP)

• 623K (S/N: WTM106-UP)

• 627H (S/N: DBW349-UP)

• 627K (S/N: WTC141-UP)

• 627K (S/N: WTN104-UP)

• 735B (S/N: L4D456-UP)

• 735B (S/N: T4P459-UP)

• 735B OEM (S/N: E4R2-UP)

• 740B (S/N: L4E7785-UP)

• 740B (S/N: T4R2737-UP)

• 740B EJ (S/N: L4F500-UP)

• 740B EJ (S/N: T4S376-UP)

• 740B OEM (S/N: E4S137-UP)

• 740B OEM (S/N: GLH144-UP)

• 773G (S/N: JWS293-UP)

• 773G (S/N: MWH360-UP)

• 773G OEM (S/N: T5S124-UP)

• 773G OEM (S/N: T5T104-UP)

• 775G (S/N: T5F427-UP)

• 775G (S/N: RFM720-UP)

• 775G OEM (S/N: T5F103-UP)

• 775G OEM (S/N: T5W111-UP)

• 777G (S/N: RDR310-UP)

• 777G (S/N: TNM795-UP)

• 777G OEM (S/N: T4Y198-UP)

• 777G OEM (S/N: T5A119-UP)

• 789D (S/N: SPD647-UP)

• 834H (S/N: BTX1317-UP)

• 836H (S/N: BXD1256-UP)

• 950K (S/N: FER3757-UP)

• 950K (S/N: J5M1153-UP)

• 950K (S/N: R4A2771-UP)

• 962K (S/N: FLL380-UP)

• 962K (S/N: T6A1060-UP)

• 962K (S/N: X4T483-UP)

• 966K (S/N: PBG10002-UP)

• 966K (S/N: TFS1320-UP)

• 966K XE (S/N: NGX442-UP)

• 972K (S/N: PEM948-UP)

• 972K (S/N: Z4W726-UP)

• 980K (S/N: GTZ9003-UP)

• 980K (S/N: W7K2461-UP)

• 980K OEM (S/N: NEP115-UP)

• 988H (S/N: A7A272-UP)

• 988H (S/N: BXY5628-UP)

• D11T (S/N: AMA534-UP)

• D11T (S/N: JEL356-UP)

• D11T (S/N: JNS135-UP)

• D11T (S/N: MDG177-UP)

• D6N LPG (S/N: PBA2042-UP)

• D6N XL (S/N: PER742-UP)

• D6T LGP (S/N: JRW562-UP)

• D6T LGP (S/N: ZJB1677-UP)

• D6T LGP PAT (S/N: EJJ314-UP)

• D6T LGP PAT (S/N: KSB2019-UP)

• D6T XL (S/N: GMK1641-UP)

• D6T XL (S/N: TSM389-UP)

• D6T XL PAT (S/N: DTD1303-UP)

• D6T XL PAT (S/N: JZC307-UP)

• D6T XW (S/N: SLJ1275-UP)

• D6T XW (S/N: WLM306-UP)

• D6T XW PAT (S/N: RCW1587-UP)

• D6T XW PAT (S/N: RRK306-UP)

• D8T (S/N: FCT1520-UP)

• D8T (S/N: MLN1994-UP)