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Diesel D-37S40-C4-O

40 GPM Diesel Hydraulic Power Unit — 37 HP, Skid

37 HP · Diesel · Skid frame · For heavy construction & continuous-duty tooling

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Price excl. tax. Free Freight, US Lower 48

Flow rate 40 GPM
Working pressure 1,000 PSI
Horsepower 37 HP
Fuel / power Diesel · Yanmar
Frame Skid
Dry weight 1,427 lb
Call for pricing & availability
Check 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
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 17.6 gal
Fuel tank capacity 9 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.

Warranty & service

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.

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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 us

Built 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.

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