BASE-MOUNTING 8Q6744 - Caterpillar

Excavator:
M312 (S/N: 6TL1-UP)
312B (S/N: 9HR1-UP)
312B L (S/N: 8JR1-UP)
312C L (S/N: CBA1-UP; CAE1-UP)
315B (S/N: 1SW1-UP; 2DW1-UP; 3AW1-UP)
319D (S/N: BZH1-UP; DAY1-UP)
320C (S/N: BDC1-UP; RAW1-UP)
320C L (S/N: SBN1-UP; BER1-UP)
322C L (S/N: BKJ1-UP; HEK1-UP)
323D L (S/N: LFL1-UP)
324D L (S/N: JJG1-UP)
325D L (S/N: A3R1-UP)
328D LCR (S/N: GTN1-UP; MKR1-UP)
329D (S/N: JHJ1-UP)
330D L (S/N: B6H1-UP; MWP1-UP)
336D (S/N: J2F1-UP; W3K1-UP)
336D L (S/N: D3P1-UP)
345C L (S/N: ESD1-UP; TDG1-UP)
345C CUSTOM FOREST MACHINE (S/N: A3L1-UP)
345C L (S/N: S5M1-UP; DHP1-UP; PJW1-UP)
345D L (S/N: YEE1-UP; EEH1-UP; RAJ1-UP; MLK1-UP)
365BLSeries II (S/N: DER1-UP)
385B (S/N: BKX1-UP)
385B L (S/N: BLY1-UP)
M312 (S/N: 6TL1-UP)
This special instruction for certain Excavators covers the spare pins and center lock clamping spacers for 172-8472, 172-8473, 172-8444, 268-4450, 268-5606, 246-8124, 241-9301, 216-7215 Coupler Pin Gp and 343-4530, 343-4531, 343-4532, 343-4533, 343-4534, 343-4535 on 311 through 385 Series B through Series D Hydraulic Excavator.Refer to Special Instruction, REHS4921-00, "Additional spare Pins and Center Lock Clamping Spacers" for installation information before proceeding with the new installation procedure.The Special Instruction is available through the normal literature distribution system. The publication can also be found on the Caterpillar Service Information System (SIS).