| Узел | Модель |
| (18) - HYDRAULIC LINES - PRIORITY PUMP CIRCUIT, OIL FILTERS | (1000) - DAVIS TASKFORCE SUPER TRENCHER (1/72-12/81) |
| (16) - HYDRAULIC SYSTEM - PUMP CIRCUIT - VALVE CONTROLS | (700) - DAVIS TASK FORCE TRENCHER (1/70-12/82) |
| (24) - HYDRAULIC SYSTEM, BOOM, STEERING AND PROPULSION CIRCUITS | (DAVIS) - FLEETLINE 16+4 TRENCHER (1/76-12/82) |
| (24) - BASIC HYDRAULIC CIRCUIT W/O ATTACHMENTS | (L55) - DAVIS FLEETLINE 70+4 TRENCHER (1/70-12/79) |
| (24) - BASIC HYDRAULIC CIRCUIT W/O ATTACHMENTS | (P55) - DAVIS FLEETLINE 70+4 TRENCHER (1/70-12/79) |
| (386) - HYDRA-BORER PUMP, PRESSURE, AND RETURN HYDRALIC CIRCUIT, MUST USE A STANDARD BACKFILL BLADE | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (388) - HYDRA-BORER PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (396) - HYDRA-BORER PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT, USED WITHOUT LINE LAYER & WITHOUT BACKHOE | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (440) - BACKHOE PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT, USED WITH H560292 BACKHOE VALVE | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (442) - BACKHOE PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT, USED WITH H588566 BACKHOE VALVE | (P60) - DAVIS FLEETLINE 30+4 TRENCHER (1/70-12/88) |
| (386) - HYDRA-BORER PUMP, PRESSURE, AND RETURN HYDRALIC CIRCUIT, MUST USE A STANDARD BACKFILL BLADE | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |
| (388) - HYDRA-BORER PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |
| (396) - HYDRA-BORER PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT, USED WITHOUT LINE LAYER & WITHOUT BACKHOE | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |
| (440) - BACKHOE PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT, USED WITH H560292 BACKHOE VALVE | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |
| (442) - BACKHOE PUMP, PRESSURE, AND RETURN HYDRAULIC CIRCUIT, USED WITH H588566 BACKHOE VALVE | (SD100) - DAVIS FLEETLINE 40+4 TRENCHER (1/70-12/86) |
| (8-132) - BASIC HYDRAULIC CIRCUIT, RESERVOIR TO PUMP AND VALVE | (CASE) - MAXI-SNEAKER CABLE LAYER (1/83-12/86) |
| (6-02) - GROUND DRIVE HYDRAULIC CIRCUIT, USED ON MODELS PRIOR TO P.I.N. 1214519 | (MAXI-SNEAKER C) - 25+4XP TRENCHER (1/90-12/92) |
| (6-04) - GROUND DRIVE HYDRAULIC CIRCUIT, P.I.N. 1214519 AND AFTER | (MAXI-SNEAKER C) - 25+4XP TRENCHER (1/90-12/92) |