Tar River ERC Series Operator's Manual page 26

ERC Round Back Rotary Cutter
Note 1: There are two styles of gearboxes for the ERC Rotary Cutters. Previous models were supplied with Note 1: There are two styles of gearboxes for the ERC Rotary Cutters. Previous models were supplied with
a gearbox having a smooth input shaft, (Fig. A). Current production models are equipped with gearboxes a gearbox having a smooth input shaft, (Fig. A). Current production models are equipped with gearboxes
having a splined input shaft, (Fig. B). Before ordering parts, identify your machine's gearbox by examining having a splined input shaft, (Fig. B). Before ordering parts, identify your machine's gearbox by examining
the shaft whether it is has smooth input shaft or splined input shaft. the shaft whether it is has smooth input shaft or splined input shaft.
Fig. A Fig. A
Gearbox with smooth shaft: Gearbox with smooth shaft:
Replace the shear bolt with PN Replace the shear bolt with PN
BM1217585 (Class 8.8) or BM1217585 (Class 8.8) or
BS1/2-13x3SB (Grade 5). BS1/2-13x3SB (Grade 5).
ERC Rotary Cutter Gearbox
ERC Rotary Cutter Gearbox
26
Fig. B Fig. B
Gearbox with splined shaft: Gearbox with splined shaft:
A shear bolt is not required on A shear bolt is not required on
the gearbox but is for the PTO. the gearbox but is for the PTO.
Replace the PTO shear bolt with Replace the PTO shear bolt with
PN DP1081 Bolt M8x1.25x50 PN DP1081 Bolt M8x1.25x50
8.8 with self-locking nut. 8.8.