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Hydraulic System

Assembly

Open-centre hydraulics with twin variable-displacement main pumps. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Hydraulic System parts and their functions

19 top-level parts · 1,540 parts in total · full bill of materials below
Hydraulic System parts diagram: 1 main hydraulic pump, 2 pilot gear pump, 3 main control valve, 4 hydraulic tank, 5 hydraulic oil cooler, 6 hydraulic return filter, 7 hydraulic hose assembly, 8 hydraulic fitting, 9 hydraulic steel tube, 10 pilot circuit valve, 11 solenoid valve, 12 hydraulic accumulator, 13 center swivel joint, 14 pressure sensor, 15 o-ring set, and 4 more. 1,540 parts in 19 top-level items.
Hydraulic System parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Main Hydraulic Pump 6 parts 2× Variable-displacement axial-piston
2 Pilot Gear Pump 1× Gear pump for pilot pressure
3 Main Control Valve 4 parts 1× Spool block
4 Hydraulic Tank 3 parts 1×
5 Hydraulic Oil Cooler 1×
6 Hydraulic Return Filter 2×
7 Hydraulic Hose Assembly 130× Wire-braided or spiral hose with crimped fittings, one run in the hydraulic circuit.
8 Hydraulic Fitting 280× ORFS, JIC or flange fitting, adapter or elbow in the hydraulic circuit.
9 Hydraulic Steel Tube 44× Bent and flared steel tube run between valve, pumps and cylinders.
10 Pilot Circuit Valve 10× Small directional, shuttle or pressure-reducing valve in the pilot circuit: travel pedal valves, pilot manifold and lock valve.
11 Solenoid Valve 10× Electrically switched valve for pump regulation, swing brake, travel speed and attachments.
12 Hydraulic Accumulator 2× Gas-charged accumulator holding pilot pressure for lowering equipment with the engine off.
13 Center Swivel Joint 1× Rotary manifold passing travel hydraulics from the upper structure to the undercarriage through the slew ring.
14 Pressure Sensor 8× Transduces fluid or gas pressure into an electrical signal.
15 O-Ring Set 40× Set of elastomer rings seated in grooves to seal static or slow-moving joints against fluid and gas, sized to ISO 3601.
16 Hex Bolt 360× Flanged hex bolt, M8 to M24, used throughout the structure, covers and equipment mounts.
17 Hex Nut 200× Flanged or nyloc hex nut mating the bolts.
18 Washer 200× Flat or spring washer under bolt heads and nuts.
19 Cable Tie & Clamp 220× Tie, P-clip or saddle clamp securing wiring, hoses and lines to the structure.

3D model

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Build & assembly graph

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Bill of materials for Hydraulic System

19 top-level lines · 32 rows shown · 1,540 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Main Hydraulic Pump 6 parts excavator-main-hydraulic-pump 2× 2 7 assembly
1.1 Pump Rotating Group excavator-pump-rotating-group 1× 2 · part
1.2 Swash Plate excavator-swash-plate 1× 2 · part
1.3 Pump Regulator excavator-pump-regulator 1× 2 · part
1.4 Ball Bearing ball-bearing 2× 4 · part
1.5 Oil Seal oil-seal 1× 2 · part
1.6 O-Ring Set oring-set 1× 2 · part
2 Pilot Gear Pump excavator-pilot-pump 1× 1 · part
3 Main Control Valve 4 parts excavator-main-control-valve 1× 1 14 assembly
3.1 Spool Block Casting excavator-spool-block 1× 1 · part
3.2 Control Spool excavator-control-spool 8× 8 · part
3.3 Relief Valve excavator-relief-valve 4× 4 · part
3.4 O-Ring Set oring-set 1× 1 · part
4 Hydraulic Tank 3 parts excavator-hydraulic-tank 1× 1 3 assembly
4.1 Tank Shell excavator-tank-shell 1× 1 · part
4.2 Suction Strainer excavator-suction-strainer 1× 1 · part
4.3 Tank Breather excavator-breather 1× 1 · part
5 Hydraulic Oil Cooler excavator-oil-cooler 1× 1 · part
6 Hydraulic Return Filter excavator-hydraulic-filter 2× 2 · part
7 Hydraulic Hose Assembly excavator-hydraulic-hose 130× 130 · part
8 Hydraulic Fitting excavator-hose-fitting 280× 280 · part
9 Hydraulic Steel Tube excavator-hydraulic-tube 44× 44 · part
10 Pilot Circuit Valve excavator-pilot-circuit-valve 10× 10 · part
11 Solenoid Valve excavator-solenoid-valve 10× 10 · part
12 Hydraulic Accumulator excavator-accumulator 2× 2 · part
13 Center Swivel Joint excavator-center-joint 1× 1 · part
14 Pressure Sensor pressure-sensor 8× 8 · part
15 O-Ring Set oring-set 40× 40 · part
16 Hex Bolt excavator-hex-bolt 360× 360 · part
17 Hex Nut excavator-hex-nut 200× 200 · part
18 Washer excavator-washer 200× 200 · part
19 Cable Tie & Clamp excavator-cable-tie 220× 220 · part

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Where the hydraulic system is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Excavator

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $5–$2k. How estimates work
VendorHQSpecialtyMOQLead time
🇮🇳Kirloskar
kbl.co.in ↗ 		Pune, IN Pumps & fluid systems 200 units 6–10 wks
🇨🇳Leo Group
leo.com.cn ↗ 		Taizhou, CN Pumps 200 units 6–10 wks
🇮🇳Shakti Pumps
shaktipumps.com ↗ 		Pithampur, IN Pumps 200 units 6–10 wks
🇨🇳CNP Pumps
cnppumps.com ↗ 		Hangzhou, CN Pumps 200 units 6–10 wks
🇮🇳Roto Pumps
rotopumps.com ↗ 		Noida, IN Pumps 200 units 6–10 wks