New Cylinder Head Bolts are Now Used on Certain Excavators {5457, 5458} Caterpillar

New Cylinder Head Bolts are Now Used on Certain Excavators {5457, 5458} [M0066544]

HYDRAULIC SYSTEM

CYLINDER GP

New Cylinder Head Bolts are Now Used on Certain Excavators {5457, 5458}

Excavator
336D (S/N: JBT1-UP)
336D2 (S/N: MFA1-UP; WDC1-UP; YCF1-UP; NAH1-UP; XBH1-UP; FAJ1-UP; LAM1-UP; NBN1-UP; ELR1-UP; FAR1-UP; ZCT1-UP; LBX1-UP; TLY1-UP)
336E (S/N: JEA1-UP; RZA1-UP; KED1-UP; YCE1-UP; TEG1-UP; GTJ1-UP; CMR1-UP; HDW1-UP; BZY1-UP; TMZ1-UP)
336F (S/N: TZA1-UP; RKB1-UP; RBC1-UP; ZBJ1-UP; SSN1-UP; LTP1-UP; NBS1-UP; KFT1-UP; MTW1-UP; DFY1-UP; WTZ1-UP)
340D2 (S/N: JEE1-UP; HHK1-UP)
340F (S/N: YBF1-UP; EAR1-UP)
349D2 (S/N: XAC1-UP; YAE1-UP; ZAE1-UP; YAG1-UP; TAH1-UP; RAN1-UP)
349E (S/N: FJB1-UP; ETC1-UP; SPG1-UP; RGH1-UP; KFX1-UP; WHZ1-UP)
349F (S/N: BZ21-UP; KEA1-UP; HLB1-UP; HPD1-UP; SFG1-UP; RAX1-UP)
352F (S/N: SD21-UP; YEG1-UP; A9J1-UP; KBP1-UP)

Description Of Change: New bolts are now used on the bucket cylinder and stick cylinder for the machines that are listed above. The new bolts have a process improvement to implement a torque angle control process to provide a consistent clamp load on all the head bolts. The improved process prevents the bolts from prematurely loosening.

Adaptable To: Check the bucket cylinder bolts and stick cylinder bolts for your machine to make sure that they are tight. If the bolts are loose, replace the former bolts with new bolts as shown in Table 1.

Show/hide table

Table 1
New Part Number	Part Name	Description	Former Part Number
7Y-5215	Bolt	90mm length bolt	457-5513
7Y-5239	Bolt	100mm length bolt	443-4779

Show/hide table

Table 2
Effectivity and Adaptability of the New Cylinder Bolts
Sales Model	Effectivity	Adaptability
336D	S/N:JBT77002-UP	S/N:JBT1-77001
336D2	S/N:MFA135-UP	S/N:MFA1-134
	S/N:WDC1322-UP	S/N:WDC1-1321
	S/N:YCF657-UP	S/N:YCF1-656
	S/N:NAH657-UP	S/N:NAH1-186
	S/N:XBH295-UP	S/N:XBH1-294
	S/N:FAJ136-UP	S/N:FAJ1-135
	S/N:LAM257-UP	S/N:LAM1-256
	S/N:NBN237-UP	S/N:NBN1-236
	S/N:ELR312-UP	S/N:ELR1-311
	S/N:FAR306-UP	S/N:FAR1-305
	S/N:ZCT9117-UP	S/N:ZCT1-9116
	S/N:LBX199-UP	S/N:LBX1-198
	S/N:TLY325-UP	S/N:TLY1-324
336E	S/N:JEA172-UP	S/N:JEA1-171
	S/N:RZA1057-UP	S/N:RZA1-1056
	S/N:KED332-UP	S/N:KED1-331
	S/N:YCE781-UP	S/N:YCE1-780
	S/N:TEG234-UP	S/N:TEG1-233
	S/N:GTJ190-UP	S/N:GTJ1-189
	S/N:CMR338-UP	S/N:CMR1-337
	S/N:HDW219-UP	S/N:HDW1-218
	S/N:BZY2644-UP	S/N:BZY1-2643
	S/N:TMZ440-UP	S/N:TMZ1-439
336F	S/N:TZA429-UP	S/N:TZA1-428
	S/N:RKB1528-UP	S/N:RKB1-1527
	S/N:RBC231-UP	S/N:RBC1-230
	S/N:ZBJ144-UP	S/N:ZBJ1-143
	S/N:SSN202-UP	S/N:SSN1-201
	S/N:LTP183-UP	S/N:LTP1-182
	S/N:NBS323-UP	S/N:NBS1-322
	S/N:KFT299-UP	S/N:KFT1-298
	S/N:MTW165-UP	S/N:MTW1-164
	S/N:DFY236-UP	S/N:DFY1-235
	S/N:WTZ228-UP	S/N:WTZ1-227
340D2	S/N:JEE261-UP	S/N:JEE1-260
340D2	S/N:HHK380-UP	S/N:HHK1-379
340F	S/N:YBF265-UP	S/N:YBF1-264
340F	S/N:EAR268-UP	S/N:EAR1-267
349D2	S/N:XAC163-UP	S/N:XAC1-162
	S/N:YAE295-UP	S/N:YAE1-294
	S/N:ZAE204-UP	S/N:ZAE1-203
	S/N:YAG108-UP	S/N:YAG1-107
	S/N:TAH358-UP	S/N:TAH1-357
	S/N:RAN236-UP	S/N:RAN1-235
349E	S/N:FJB205-UP	S/N:FJB1-204
	S/N:ETC170-UP	S/N:ETC1-169
	S/N:SPG245-UP	S/N:SPG1-244
	S/N:RGH222-UP	S/N:RGH1-221
	S/N:KFX702-UP	S/N:KFX1-701
	S/N:WHZ149-UP	S/N:WHZ1-148
349F	S/N:BZ2454-UP	S/N:BZ21-453
	S/N:KEA171-UP	S/N:KEA1-170
	S/N:HLB137-UP	S/N:HLB1-136
	S/N:HPD455-UP	S/N:HPD1-454
	S/N:SFG115-UP	S/N:SFG1-114
	S/N:RAX107-UP	S/N:RAX1-106
352F	S/N:SD2202-UP	S/N:SD21-201
	S/N:YEG224-UP	S/N:YEG1-223
	S/N:A9J271-UP	S/N:A9J1-270
	S/N:KBP204-UP	S/N:KBP1-203

Procedure

Replace the former bolts with the new bolts that are listed in Table 1. Follow the new torque turn procedure below.

Show/hide table




Illustration 1	g06023438

Mark the bolt and torque the socket head bolt to 300 N·m (220 lb ft).
Show/hide table

Illustration 2 g06023446
Mark the work surface.
Show/hide table

Illustration 3 g06023456
Turn the bolt 30 degrees to align A-B to achieve the final torque.