Woodward SAW40 Governor Speed Adjusting Motor 24 VDC – P/N 1766-623 (Sawamura Denki Kogyo)

Product Information

Product	Speed Adjusting Motor, made expressly for Woodward Governor (Japan) Ltd.
Manufacturer	Sawamura Denki Kogyo, Japan
Brand / for	Woodward Governor (Japan) Ltd.
Type	SAW40
Part Number (P/N)	1766-623 (last digit partly covered by the watermark in the photo)
Serial Number (S/N)	61074
Voltage	24 VDC
Current	0.15 A
Safe Torque	2.0 N·m (value partly covered by the watermark)
Country of Manufacture	Made in Japan
Condition	New
Supplier	SM MARINE SERVICE™, Chattogram, Bangladesh

Product Introduction

The Woodward SAW40 Speed Adjusting Motor (P/N 1766-623) is a 24 VDC governor motor made by Sawamura Denki Kogyo in Japan, expressly for Woodward Governor (Japan) Ltd. It is fitted to Woodward mechanical-hydraulic governors on marine diesel generator engines and main engines to change the engine speed setting remotely. SM MARINE SERVICE™ (https://www.smmarineservice.com/) supplies this new speed adjusting motor and other Woodward governor spare parts to ship owners, ship managers, engine workshops and shipyards worldwide.

What Is This Equipment?

A speed adjusting motor (also called governor motor, synchronizing motor or speed setting motor) is a small geared DC motor mounted on top of a Woodward hydraulic governor. When the operator or the power management / synchronizer sends a raise or lower signal, the motor slowly turns the governor's speed setting shaft. This changes the engine speed for synchronizing a generator to the switchboard bus bar and for sharing load between generators. A slip clutch limits the output torque (safe torque 2.0 N·m on this unit), so the governor's manual speed knob can still be used. Woodward speed adjusting motors are used on governors such as the UG-8, UG-10, UG-25, UG-40 and PG families; the exact governor model that this SAW40 (P/N 1766-623) was specified for is not verified.

Main Features

• Genuine speed adjusting motor made expressly for Woodward Governor (Japan) Ltd.
• Made by Sawamura Denki Kogyo, Japan
• 24 VDC supply, low current 0.15 A
• Safe torque limit 2.0 N·m (slip clutch protection)
• Remote raise / lower speed setting of mechanical-hydraulic governors
• Used for generator synchronizing and load sharing
• Compact, robust housing for engine-room conditions
• Brand new unit

Woodward SAW40 Governor Speed Adjusting Motor 24 VDC – supplied by SM MARINE SERVICE™

Main Technical Specifications

Type	SAW40
P/N	1766-623
S/N	61074
Rated voltage	24 VDC
Rated current	0.15 A
Safe torque	2.0 N·m
Output speed	Not shown on nameplate
Wiring	2 flying leads (red and black)
Manufacturer	Sawamura Denki Kogyo, Made in Japan
Made for	Woodward Governor (Japan) Ltd.

Inside the Unit: PCBs, Modules & Part Numbers

The SAW40 is an electro-mechanical geared DC motor and contains no PCB. Its main internal parts are listed below; separate part numbers were not found (Not verified).

DC Motor

24 VDC permanent-magnet motor that drives the speed setting in raise or lower direction.

Reduction Gearbox

Reduces motor speed to a slow output speed for fine speed adjustment.

Slip Clutch (Safe Torque)

Limits output torque to 2.0 N·m and allows manual speed adjustment on the governor.

Output Coupling / Drive Shaft

Connects the motor to the governor's speed setting shaft.

Main Components & Related Units

SAW40, P/N 1766-623	Speed adjusting motor 24 VDC (this unit)
SMM40, P/N 1766-523	Related Woodward/Sawamura 24 VDC speed adjusting motor (listed by suppliers for UG8)
SMM40, P/N 1766-541	Related Woodward/Sawamura speed adjusting motor
S-40	Related Sawamura speed adjusting motor, 110 V AC 50/60 Hz
Woodward governors	UG-8, UG-10, UG-25, UG-25+, UG-40, UG-8 Dial, UG-8 Lever, UG-10 Dial, UG-40 Dial, UG-32, PG, PGA, PGG, PGE, PGEV, PGPL, EG-3P, EGB, SG, PSG, UA, UG Actuator (compatibility of this exact P/N: Not verified)
Related electronic controls	Woodward SPM-A synchronizer, 2301A / 2301D load sharing and speed control, EPG, ProAct, 723 / 723 Plus, easYgen (system integration: Not verified)

Marine & Industrial Applications

• Marine diesel generator engines with Woodward UG / PG governors
• Main engines and auxiliary engines with remote speed setting
• Generator synchronizing and load sharing in ship power plants
• Power stations, emergency generators and industrial diesel engines

Nameplate: Speed Adjusting Motor made expressly for Woodward Governor (Japan) Ltd., Type SAW40, 24 VDC

Common Problems & Troubleshooting

• Engine speed does not change on raise / lower: check 24 VDC supply, wiring, relay contacts of the synchronizer or switchboard and motor terminals.
• Motor runs but speed does not change: check the coupling to the governor and slip clutch.
• Motor turns in wrong direction: check polarity of the raise / lower wiring.
• Motor hot or noisy: check for mechanical binding of the governor speed setting shaft.
• Slow synchronizing: check motor speed and supply voltage.

Safety note: stop or isolate the engine control before removing the motor from the governor, and check engine speed after replacement. Only qualified engineers should work on the governor.

Maintenance Tips

• Check wiring and terminal tightness during routine governor maintenance
• Keep the motor clean and dry, free of oil
• Test raise / lower operation from the switchboard regularly
• Keep a spare speed adjusting motor on board for critical generators

Spare Parts & Replacement Availability

SM MARINE SERVICE™ supplies the Woodward SAW40 speed adjusting motor and other Woodward governor motors and spare parts. For a quotation, please send the vessel name, a photo of the motor nameplate (type, P/N, voltage), the governor model and the quantity. We ship worldwide.

Why This Equipment Is Still Used

Woodward mechanical-hydraulic governors such as the UG-8, UG-10, UG-25 and UG-40 are still installed on a very large number of marine engines. Replacing the speed adjusting motor with the original type keeps the governor, wiring and synchronizing system working without changes.

FAQ

What is the Woodward SAW40?
A 24 VDC speed adjusting motor made by Sawamura Denki Kogyo for Woodward Governor (Japan) Ltd.

What is the part number?
The nameplate shows P/N 1766-623.

What voltage does it use?
24 VDC, 0.15 A.

What is the safe torque?
2.0 N·m.

Which governors use a speed adjusting motor?
Woodward UG-8, UG-10, UG-25, UG-40 and PG family governors can be fitted with speed adjusting motors; compatibility of this exact P/N must be confirmed.

Is there a PCB inside the motor?
No, it is an electro-mechanical geared DC motor.

What is the difference between SAW40, SMM40 and S-40?
They are different Sawamura / Woodward speed adjusting motor types; S-40 is listed as a 110 V AC motor, SMM40 and SAW40 as 24 VDC motors.

Is this motor new?
Yes, this unit is new.

Do you supply other Woodward governor parts?
Yes, please send your governor model and part numbers.

Do you ship worldwide?
Yes, SM MARINE SERVICE™ ships worldwide.

Short Product Description

The Woodward SAW40 speed adjusting motor (P/N 1766-623, S/N 61074) is a 24 VDC, 0.15 A governor motor made in Japan by Sawamura Denki Kogyo expressly for Woodward Governor (Japan) Ltd. With a safe torque of 2.0 N·m, it remotely raises and lowers the speed setting of Woodward mechanical-hydraulic governors for generator synchronizing and load sharing on marine diesel engines. Woodward speed adjusting motors are used on governor families such as UG-8, UG-10, UG-25, UG-40 and PG. SM MARINE SERVICE™ supplies this motor new, together with other Woodward governor spare parts, with worldwide shipping.

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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/

Contact SM MARINE SERVICE™ today for a quotation on the Woodward SAW40 Speed Adjusting Motor and Woodward governor spare parts.

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