2011/08/10 Caterpillar

New Line Relief Valves are Now Used for Certain Excavators and Mobile Hydraulic Power Units {5069, 5117}

Usage:

345C A3L

Excavator: 345C (S/N: TBA1-UP; FPC1-UP; MDC1-UP; SPC1-UP; ESD1-UP; WDE1-UP; TDG1-UP; GBH1-UP; GPH1-UP; TAJ1-UP; A3L1-UP; GCL1-UP; S5M1-UP; RFN1-UP; SCN1-UP; DHP1-UP; JAR1-UP; M2R1-UP; D3S1-UP; ELS1-UP; LYS1-UP; PJW1-UP; BWY1-UP) 345D (S/N: YEE1-UP; NEG1-UP; RGG1-UP; EEH1-UP; RAJ1-UP; MLK1-UP; JKN1-UP; PBT1-UP) W345C (S/N: R5K1-UP)
Mobile Hydraulic Power Unit: 345C MHPU (S/N: NRF1-UP; B6N1-UP) 345D MHPU (S/N: P5D1-UP)

Description of Change: New relief valves are now used on the machines listed above. The new relief valves hold the pressure settings and increase the performance. The new relief valves have improved the pressure settings for the bucket, stick, and boom circuits.

Adaptable To: The former 239-8983 Relief Valve Gp has been replaced with the new 352-7202 Relief Valve Gp. The former 239-8984 Relief Valve Gp has been replaced with the new 352-7203 Relief Valve Gp.

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Illustration 1	g02505859
(1) New relief valve group (2) Former relief valve group

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Table 1
Improved Relief Valve Gp
Model	Effectivity	Adaptability
345C	S/N:TBA453-UP	S/N:TBA1-452
	S/N:FPC147-UP	S/N:FPC1-146
	S/N:MDC234-UP	S/N:MDC1-233
	S/N:SPC284-UP	S/N:SPC1-283
	S/N:ESD246-UP	S/N:ESD1-245
	S/N:WDE169-UP	S/N:WDE1-168
	S/N:TDG413-UP	S/N:TDG1-412
	S/N:GBH206-UP	S/N:GBH1-205
	S/N:GPH538-UP	S/N:GPH1-537
	S/N:TAJ381-UP	S/N:TAJ1-380
	S/N:A3L106-UP	S/N:A3L1-105
	S/N:GCL280-UP	S/N:GCL1-279
	S/N:S5M317-UP	S/N:S5M1-316
	S/N:RFN146-UP	S/N:RFN1-145
	S/N:SCN210-UP	S/N:SCN1-209
	S/N:DHP464-UP	S/N:DHP1-463
	S/N:JAR313-UP	S/N:JAR1-312
	S/N:M2R305-UP	S/N:M2R1-304
	S/N:D3S308-UP	S/N:D3S1-307
	S/N:ELS180-UP	S/N:ELS1-179
	S/N:LYS191-UP	S/N:LYS1-190
	S/N:PJW2443-UP	S/N:PJW1-2442
	S/N:BWY349-UP	S/N:BWY1-348
345D	S/N:YEE614-UP	S/N:YEE1-613
	S/N:NEG513-UP	S/N:NEG1-512
	S/N:RGG270-UP	S/N:RGG1-269
	S/N:EEH971-UP	S/N:EEH1-970
	S/N:RAJ376-UP	S/N:RAJ1-375
	S/N:MLK184-UP	S/N:MLK1-183
	S/N:JKN111-UP	S/N:JKN1-110
	S/N:PBT442-UP	S/N:PBT1-441
W345C	S/N:R5K203-UP	S/N:R5K1-202
345C MHPU	S/N:NRF105-UP	S/N:NRF1-104
345C MHPU	S/N:B6N172-UP	S/N:B6N1-171
345D MHPU	S/N:P5D159-UP	S/N:P5D1-158