UG-8
Woodward
Refurbished
| Manufacturer | Woodward (Woodward Governor Company) |
| Product Name | Hydraulic-mechanical speed governor |
| Type / Model | UG-8 Dial Governor (UG-8D) |
| Front Panel Controls | Speed Droop, Speed Setting, Load Limit, Speed Setting Indicator, Compensation pointer |
| Fitted Accessories (photographed units) | Top-mounted shutdown solenoid and remote speed setting motor; oil sight glass |
| Part Number | Not clearly visible in the supplied photograph (nameplate part numbers differ between units) |
| Serial Number | Not clearly visible in the supplied photograph |
| Governor Speed Range | Not clearly visible in the supplied photograph |
| PCB / Board Number | Not applicable – hydraulic-mechanical governor without internal PCB |
| Country of Manufacture | Not verified |
| Equipment Type | Diesel engine / generator speed control |
| Condition | Refurbished |
The Woodward UG-8 Dial Governor is one of the most widely used hydraulic-mechanical speed governors in the marine world. For decades it has controlled the speed of auxiliary diesel generator engines, small propulsion engines, pumps and compressors on ships of every type – and thousands of them are still running today.
Built by Woodward, the UG-8 combines its own oil pump, flyweight ballhead and power piston in one compact case, and offers simple front-panel dials for speed setting, droop and load limit. SM MARINE SERVICE™ supplies refurbished UG-8 governors and governor spare parts to ship owners and engine workshops worldwide – send your inquiry through https://www.smmarineservice.com/.
A governor keeps an engine running at the required speed regardless of load. The UG-8 is driven by the engine; flyweights in its ballhead sense speed, and a pilot valve directs pressurised oil to a power piston that turns the terminal (output) shaft. The terminal shaft is linked to the fuel racks, so the governor increases or decreases fuel as load changes.
The “Dial” version is set from the front panel: the Speed Setting knob sets engine speed, Speed Droop allows load sharing between paralleled generators, and Load Limit restricts maximum fuel – turning it to zero shuts the engine down. A compensation needle valve and pointer adjust stability. Optional remote speed setting motors and shutdown solenoids allow control from the switchboard or alarm system.
Woodward UG-8 dial panel with speed droop, speed setting, load limit and speed setting indicator.
Published Woodward data for the UG-8 Dial Governor (Manual 03040):
| Work Output | 13.2 N·m (9.7 lb-ft) |
| Terminal Shaft Travel | Max. 42°; recommended approx. 28–30° no load to full load |
| Internal Oil Pressure | 827 kPa (120 psi) |
| Recommended Drive Speed | 1000–1500 rpm (max. 1500 rpm continuous) |
| Drive Power | 249 W (1/3 hp) |
| Drive Rotation | Clockwise or counter-clockwise |
| Operating Temperature | -29 to +99 °C (-20 to +210 °F) |
| Oil Capacity | Approx. 2 quarts (fill to sight glass) |
| Weight | Approx. 22.7 kg (50 lb) – UG-8 MAS published value; not verified for this unit |
| Speed Droop | Adjustable; 0 for isochronous, typically 30–50 dial setting for paralleled AC units |
The UG-8 is a hydraulic-mechanical governor, so it contains no electronic PCB. Buyers usually search for the following internal assemblies and accessories:
The speed-sensing assembly; available with different natural frequencies to suit the engine.
Directs oil to or from the power piston according to the flyweight position.
Converts oil pressure into rotation of the output (terminal) shaft connected to the fuel linkage.
Internal gear pump and accumulators that maintain the governor’s working oil pressure.
Large and small dashpot pistons, floating lever and needle valve that give stable speed control after load changes.
The dial-operated mechanisms behind the front panel knobs.
Electric motor mounted on the governor cover for remote raise/lower of engine speed (Woodward manual 03035).
Electrical shutdown device on the cover, energise- or de-energise-to-shutdown (Woodward manual 03013).
Low lube oil pressure shutdown (manual 03016), magnetic speed pickup (manual 36052), micro switches and wiring harness, and booster servomotor for quick starts (manual 36684).
Woodward UG-8 dial governors fitted with speed setting motor and shutdown solenoid.
Safety: always have an independent overspeed trip on the engine. Never adjust linkage with the engine running unless following the manufacturer’s procedure, and keep hands clear of moving fuel linkage.
SM MARINE SERVICE™ supplies Woodward UG-8 dial and lever governors, speed setting motors, shutdown solenoids and governor spare parts to ships and engine workshops worldwide. Depending on availability, we can offer refurbished, used, reconditioned or new units.
For an accurate quotation please send:
Availability and condition are confirmed with the quotation. Contact us via www.smmarineservice.com.
The UG-8 is simple, robust and works without electronics, which makes it ideal for engine rooms. Many generator engines were designed around the UG-8 drive, mounting and linkage, so replacing a worn governor with the same type keeps the engine set-up, load sharing and approvals unchanged – the quickest and most economical way to restore reliable speed control.
A hydraulic-mechanical speed governor with front-panel dials, used mainly on diesel generator engines.
13.2 N·m (9.7 lb-ft) according to Woodward manual 03040.
Recommended 1000–1500 rpm, maximum 1500 rpm continuous.
No. It is fully hydraulic-mechanical. Optional accessories such as speed setting motors and solenoids are electrical.
The Dial version is set by front-panel knobs; the Lever version uses an external lever for speed setting.
Yes, by using speed droop. Isochronous (zero droop) is for single-unit operation.
Use the oil grade recommended in the Woodward manual for your operating temperature; fill to the sight-glass mark.
Most often due to incorrect compensation needle valve setting, air or dirt in the oil, or worn linkage.
Yes, subject to availability. Please send the nameplate photo and voltage.
Yes, SM MARINE SERVICE™ arranges worldwide shipping to vessels and ports.
The Woodward UG-8 Dial Governor is a proven hydraulic-mechanical speed governor for marine auxiliary diesel generators, pumps and compressors. It delivers 13.2 N·m work output with 42° terminal shaft travel and offers front-panel speed setting, speed droop and load limit adjustment, with optional speed setting motor and shutdown solenoid for remote control. SM MARINE SERVICE™ supplies refurbished UG-8 governors and spare parts to ships worldwide – contact us today for availability and price.
SM MARINE SERVICE™
Marine Automation & Navigation Equipment Supplier
Available Equipment Conditions: New • Used • Refurbished • Reconditioned
Specific product condition and availability are subject to confirmation.
Stock Locations: Bangladesh • China
Services: Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: https://www.smmarineservice.com/
Need a Woodward UG-8 governor, speed setting motor or governor spare part? Send us your requirement today for a fast quotation and worldwide delivery.
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