Installation of a Dual Tapered Roller Bearing HEUI Hydraulic Pump onto Certain C7 ACERT Engines

Asphalt Paver:

AP-1000D (S/N: EAD1-UP)

AP-1055D (S/N: FAC1-UP; A6P1-UP)

BG-2455D (S/N: BNW1-UP; BXW1-UP)

BG-260D (S/N: BPW1-UP)

Engine:

C7 (S/N: JRA1-UP; JTF1-UP)

Marine Engine:

C7 MARINE (S/N: C7B1-UP; C7X1-UP; C7Z1-UP)

Excavator:

324D L (S/N: LAB1-UP)

324D LN (S/N: EJC1-UP)

324D (S/N: MND1-UP)

324D L (S/N: T2D1-UP; BYE1-UP; JJG1-UP)

324D (S/N: ECH1-UP)

324D LN (S/N: TRH1-UP)

324D L (S/N: BTK1-UP; GPK1-UP)

324D LL LGP FOREST MACHINE (S/N: JGK1-UP)

324D L (S/N: SYM1-UP)

324D (S/N: AWN1-UP)

324D L (S/N: TSN1-UP; DFP1-UP)

324D (S/N: JZR1-UP)

324D L (S/N: JAT1-UP; PYT1-UP)

324D (S/N: CJX1-UP)

325D L (S/N: GPB1-UP; NAC1-UP; KBE1-UP)

325D LN (S/N: PKE1-UP)

325D (S/N: KDG1-UP; C4H1-UP; DBH1-UP)

325D L (S/N: PEH1-UP)

325D FOREST MACHINE (S/N: C7K1-UP)

325D L (S/N: ERK1-UP)

325D (S/N: RJK1-UP)

325D LL FOREST MACHINE (S/N: C8L1-UP)

325D L (S/N: LAL1-UP)

325D (S/N: MCL1-UP)

325D L (S/N: PAL1-UP)

325D (S/N: CJM1-UP)

325D LL FOREST MACHINE (S/N: C9M1-UP)

325D L (S/N: AZP1-UP; DAP1-UP; A3R1-UP)

325D MH (S/N: GBR1-UP)

325D L (S/N: T2S1-UP; CYW1-UP)

326D L (S/N: PJM1-UP)

328D LCR (S/N: SWF1-UP; BYH1-UP; GTN1-UP; MKR1-UP; RMX1-UP)

329D L (S/N: MNB1-UP; XDB1-UP)

329D (S/N: BFC1-UP; BBF1-UP)

329D L (S/N: CZF1-UP; DJF1-UP)

329D (S/N: JHJ1-UP; WDK1-UP)

329D L (S/N: TZL1-UP)

329D LN (S/N: EBM1-UP)

329D (S/N: TPM1-UP; BYS1-UP)

329D L (S/N: WLT1-UP; LFW1-UP; YFW1-UP)

329D (S/N: SCY1-UP)

329D L (S/N: TAY1-UP)

329D (S/N: DTZ1-UP)

Forest Machine:

324D FM FOREST MACHINE (S/N: JKR1-UP)

324D FM LL FOREST MACHINE (S/N: JLS1-UP)

Forwarder:

584 (S/N: PAK1-UP)

584HD (S/N: PBK1-UP)

Motor Grader:

120K Series 2 (S/N: SZS1-UP)

120K (S/N: SZN1-UP)

12K (S/N: SZP1-UP)

12M (S/N: B921-UP)

140K (S/N: JPA1-UP; SZL1-UP)

140M (S/N: B9D1-UP; B9M1-UP)

160K (S/N: SZM1-UP)

Mobile Hydraulic Power Unit:

323D MHPU (S/N: DCY1-UP)

324D MHPU LN (S/N: M4A1-UP; KJR1-UP)

324D MHPU (S/N: LBW1-UP)

325D MHPU L (S/N: SRC1-UP; C3N1-UP; H3N1-UP; X3N1-UP)

328D MHPU LCR (S/N: JTC1-UP)

329D MHPU L (S/N: J8D1-UP; J9D1-UP; L5G1-UP; L5H1-UP)

Wheel Loader:

950H (S/N: N1A1-UP; JAD1-UP; M1G1-UP; J5J1-UP; K5K1-UP; MXL1-UP; JLX1-UP)

962H (S/N: N4A1-UP; SSA1-UP; M3G1-UP; J6J1-UP; K6K1-UP; MAL1-UP; L5S1-UP; PCW1-UP)

Wheel Skidder:

525C (S/N: 5251-UP)

535C (S/N: 5351-UP)

545C (S/N: 5451-UP)

Introduction

This Special Instruction details instructions to change the present unit injector hydraulic pump for a HEP pump that adds an opposing tapered roller bearing The additional bearing counters gear torsional loads that can lift the rollers off the race and lead to high contact stresses. The new pump design is longer than the current pump. Certain applications will require replacing additional components due to the longer HEP pump. A new high-pressure oil line and adapter are required to connect the pump to the cylinder head.

Safety Information