2012/01/03 Caterpillar

Improvements Have Been Made to Manufacturing Processes of the Piston for the Track Adjuster on Certain Excavators and Mobile Hydraulic Power Units {4157}

Usage:

390D BYP

Excavator: 336D (S/N: PTB1-UP; JBF1-UP; LMG1-UP; MYG1-UP; KDJ1-UP; L5K1-UP; PPN1-UP; MYP1-UP; M2P1-UP; JWR1-UP; DTS1-UP; WET1-UP) 345D (S/N: RGD1-UP; RGG1-UP; KFH1-UP; NLM1-UP; L5R1-UP; LKY1-UP) 365C (S/N: ELC1-UP; GWC1-UP; MEM1-UP; FEN1-UP; PAR1-UP; MCS1-UP; MCY1-UP) 374D (S/N: PJA1-UP; PAP1-UP; PAS1-UP; PAX1-UP) 385C (S/N: EDA1-UP; MMA1-UP; KGB1-UP; KBC1-UP; SBE1-UP; T2E1-UP; T2F1-UP; KKK1-UP; EAM1-UP; JCM1-UP; WAW1-UP; MNZ1-UP) 390D (S/N: WAG1-UP; BYP1-UP; WAP1-UP; WBT1-UP; KCZ1-UP)
Mobile Hydraulic Power Unit: 336D MHPU (S/N: M3M1-UP; M3N1-UP; M3S1-UP) 345D MHPU (S/N: P5D1-UP) 365C MHPU (S/N: GSZ1-UP) 374D MHPU (S/N: JNZ1-UP) 385C MHPU (S/N: MSF1-UP; M3P1-UP; M3W1-UP) 390D MHPU (S/N: M1M1-UP)

The manufacturing process has been improved. The improvements have been made on machining, heat treatment, and packaging to avoid possible issues with the piston. A visual inspection is also done before the piston is assembled into the cylinder to ensure proper alignment.

Show/hide table

Table 1
Effectivity and Adaptability of the Improved Process
Model	Effectivity	Adaptability
336D	S/N:PTB375-UP	S/N:PTB1-374
	S/N:JBF178-UP	S/N:JBF1-177
	S/N:LMG176-UP	S/N:LMG1-175
	S/N:MYG410-UP	S/N:MYG1-409
	S/N:KDJ394-UP	S/N:L5K1-393
	S/N:PPN640-UP	S/N:PPN1-639
	S/N:MYP192-UP	S/N:MYP1-191
	S/N:M2P109-UP	S/N:M2P1-108
	S/N:JWR188-UP	S/N:JWR1-187
	S/N:DTS214-UP	S/N:DTS1-213
	S/N:WET351-UP	S/N:WET1-350
345D	S/N:RGD150-UP	S/N:RGD1-149
	S/N:RGG270-UP	S/N:RGG1-269
	S/N:KFH300-UP	S/N:KFH1-299
	S/N:NLM251-UP	S/N:NLM1-250
	S/N:L5R203-UP	S/N:L5R1-202
	S/N:LKY511-UP	S/N:LKY1-510
365C	S/N:ELC603-UP	S/N:ELC1-602
	S/N:GWC229-UP	S/N:GWC1-230
	S/N:MEM275-UP	S/N:MEM1-274
	S/N:FEN156-UP	S/N:FEN1-155
	S/N:PAR273-UP	S/N:PAR1-272
	S/N:MCS543-UP	S/N:MCS1-542
	S/N:MCY550-UP	S/N:MCY1-549
374D	S/N:PJA144-UP	S/N:PJA1-143
	S/N:PAP196-UP	S/N:PAP1-195
	S/N:PAS510-UP	S/N:PAS1-509
	S/N:PAX338-UP	S/N:PAX1-337
385C	S/N:EDA558-UP	S/N:EDA1-557
	S/N:MMA286-UP	S/N:MMA1-285
	S/N:KGB499-UP	S/N:KGB1-498
	S/N:KBC241-UP	S/N:KBC1-240
	S/N:SBE530-UP	S/N:SBE1-529
	S/N:T2E342-UP	S/N:T2E1-341
	S/N:T2F189-UP	S/N:T2F1-188
	S/N:KKK227-UP	S/N:KKK1-226
	S/N:EAM322-UP	S/N:EAM1-321
	S/N:JCM186-UP	S/N:JCM1-185
	S/N:WAW234-UP	S/N:WAW1-233
	S/N:MNZ173-UP	S/N:MNZ1-172
390D	S/N:WAG171-UP	S/N:WAG1-170
	S/N:BYP126-UP	S/N:BYP1-125
	S/N:WAP282-UP	S/N:WAP1-281
	S/N:WBT195-UP	S/N:WBT1-194
	S/N:KCZ158-UP	S/N:KCZ1-157
336D MHPU	S/N:M3M103-UP	S/N:M3M1-102
	S/N:M3N121-UP	S/N:M3N1-120
	S/N:M3S103-UP	S/N:M3S1-102
345D MHPU	S/N:P5D159-UP	S/N:P5D1-158
365C MHPU	S/N:GSZ151-UP	S/N:GSZ1-150
374D MHPU	S/N:JNZ116-UP	S/N:JNZ1-115
385C MHPU	S/N:MSF120-UP	S/N:MSF1-119
	S/N:M3P102-UP	S/N:M3P1-101
	S/N:M3W102-UP	S/N:M3W1-101
390D MHPU	S/N:M1M105-UP	S/N:M1M1-104