Diesel Hydraulic Power Units Unit
Diesel Hydraulic Power Units
Hover to zoom
Diesel Hydraulic Power Units
D-37S40-C4-O
40 GPM Diesel Hydraulic Power Unit — 37 HP, Skid
37 HP · Diesel · Skid frame · For heavy construction & continuous-duty tooling
Call for pricing & availability
Price excl. tax. Free Freight, US Lower 48
Flow rate
40 GPM
Working pressure
1,000 PSI
Horsepower
37 HP
Fuel / power
Diesel Hydraulic Power Units · Yanmar
Frame
Skid
Dry weight
1,427 lb
Call for pricing & availability
1-year warranty
US service network
US-based support
Free freight — US lower 48
Overview
The HydraTough D-37S40-C4-O is a 40 GPM diesel hydraulic power unit built for hydraulic breakers, underground boring, hydraulic excavation and similar field work. It runs on a 37 HP Yanmar engine, with a fixed 40 GPM flow rate. Working pressure 1000 PSI. Single-circuit, skid-mounted for stable placement and crane or forklift lifting. A limited-build unit — availability confirmed at order.
Model decoder
HydraTough model numbers identify the unit's configuration — fuel, horsepower, pump setup, flow and frame.
D-37S40-C4-O
- D
- Diesel engine
- 37
- 37 HP
- S
- Single circuit
- 40
- 40 GPM
- C4
- Skid flow config
- O
- Skid frame
Technical specifications
Model number
D-37S40-C4-O
Fuel type
Diesel Hydraulic Power Units
Working pressure
1,000 PSI
Horsepower
37 HP
Engine
Yanmar
Circuit type
Single circuit
Frame
Skid
Dry weight
1,427 lb
Relief valve setting
1100 psi
Engine / motor model
3TNV88C
Flow configuration
Fixed
Dimensions (L×W×H)
74" x 40” x 54”
Hydraulic fluid capacity
60 gal
Fuel tank capacity
17 gal
Max RPM
2600
Coupling type
5100 series couplers
Warranty period
1 year
*Price subject to change. Please contact HydraTough for accurate pricing and stock availability.
Product information
This diesel hydraulic power unit is built for heavier, stationary, and continuous-duty work. The skid frame is made to be lifted into place by crane or forklift and run hard on site. Compare flow rate, horsepower, and working pressure against your tools to confirm fit.
Applications
Hydraulic breakers
Underground boring
Hydraulic excavation
Marine & underwater
Oilfield
Built for salt water
The D-37S40-C4-O is the largest unit in the HydraTough range — 37 HP, 40 GPM, skid-mounted for crane loading and deck installation. For marine contractors running heavy hydraulic equipment from a vessel or barge, it delivers the output and stability that large-scale offshore operations demand.
Designed to be serviced
Every HydraTough unit is built for straightforward field servicing. Parts are stocked in the US. Manuals are free — no account or registration required.
How we stack up
HydraTough vs typical competitors.
Feature / benefit
HydraTough
Typical competitors
Flow performance
HydraTough
Tested to hit rated GPM at rated PSI
Typical competitors
Often rated on paper, not verified under load
Component access / maintenance
HydraTough
Open access to hydraulic components for easy maintenance
Typical competitors
Components frequently enclosed, harder to service
Fuel tank
HydraTough
Large EPA-compliant 5-gallon tank (Prowler frame)
Typical competitors
Smaller tanks, more frequent refueling
Lead time
HydraTough
Ships in 1–2 business days on standard models
Typical competitors
Often multi-week lead times
Customization
HydraTough
Custom units built to spec available upon request
Typical competitors
Standard configurations only
Reviews
What crews say after the job.
FAQs
Frequently asked questions
Still not sure if this is the right unit? Our US-based team can help you match it to your tools.
Talk to usBuilt for hydraulic breakers, underground boring, hydraulic excavation, marine & underwater, oilfield.
D = diesel engine, 37 = 37 hp, S = single circuit, 40 = 40 GPM, C4 = skid flow config, O = skid frame.
This is a skid-mounted unit, built to be lifted into place by crane or forklift rather than wheeled.
This is a limited-build unit; availability is confirmed at order. In-stock units ship from US warehousing in 1–2 business days.
Standard units are direct purchase. For custom specifications, visit our custom units page (/products/custom).
Yes, quick connect couplers can be removed or replaced with customer specified couplers.
More diesel hydraulic power units power units.
Diesel Hydraulic Power Units Unit
Diesel Hydraulic Power Units Unit
D-25S12-L7-S
12 GPM Diesel Hydraulic Power Unit — 25 HP, Skid
2,500 PSI
Caterpillar
Caterpillar
Out of stock
View unit