| Узел | Модель |
| (256) - BACKFILL BLADE HYD. CIRCUIT, MECHANICAL ANGLING, USED BEFORE 30+4 S/N 4700, BEFORE 40+4 S/N 3600 | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (334) - LINE LAYER EQUIPMENT AND OIL COOLER HYD. CIRCUIT, USED BEFORE 30+4 S/N 4700 AND BEFORE 40+4 S/N 3600 | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (338) - LINE LAYER EQUIP. & OIL COOLER HYD. CIRCUIT, USED ON 30+4 S/N 5210 & AFT. & ON 40+4 S/N 3930 & AFT. | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (256) - BACKFILL BLADE HYD. CIRCUIT, MECHANICAL ANGLING, USED BEFORE 30+4 S/N 4700, BEFORE 40+4 S/N 3600 | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |
| (334) - LINE LAYER EQUIPMENT AND OIL COOLER HYD. CIRCUIT, USED BEFORE 30+4 S/N 4700 AND BEFORE 40+4 S/N 3600 | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |
| (338) - LINE LAYER EQUIP. & OIL COOLER HYD. CIRCUIT, USED ON 30+4 S/N 5210 & AFT. & ON 40+4 S/N 3930 & AFT. | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |