Universal - Gaseous or Diesel
LED Indicators - Actuator, Pickup, Battery
Simple Screwdriver Setup, No PC Required
Compatible with All GAC Actuators Except - 2001
Fixed, Variable, or Droop Governing with Idle
Smoke/Ramp Control
   The next generation of GAC’s Speed Controllers, the ESD5500-II Fusion Series combines all of the most popular functions of the various ESD5500 Series (5500, 5520, 5526 & 5528) into a single, high-performance unit. The ESD5500-II speed control unit is designed to precisely control engine speed with rapid responses to transient load changes. The ESD5500-II speed control is compatible with all GAC proportional actuators except the ACB2001 electric actuator.  Ruggedly built to withstand all engine environments, the ESD5500-II has all the same well known features of the ESD5500 and also incorporates selectable light-force for low current actuators, dither for difficult engines with respect to stability, and integrated anti-windup for both diesel and gaseous applications.

KT175-RS-R - Bosch Pump with Right Hand Rack, RS/RSV Governor. Works with 175 Series Actuator

KT197 - Adapts 175 Series Actuators to Bosch EDC Governor Housing. Works with any 175 Series Actuator
KT153 - Motorpal Mi Series PPxM10P1i Pumps. Works with any 175 Series Actuator 

KT175A / KT175A-R-SA - Adapts 175 Series Actuator to Bosch 'A' Pump with Right Hand Rack (SA used w/ Internal Actuator Rack Return Spring)


New Improvement on 175 Series Passed Severe Vibration Qualification Test

Dongfeng Cummins (DCEC) updated the older L series to the 6LTAA9.5 to obtain higher performance and efficiency. During testing it was found that peak level vibration on the actuator could exceed 20G, which is above the recommended limit for 175 series actuators. GAC then quickly made design improvements to address risks of failure in such an operating environment. The improved version passed 60 hours of vibration test at an accredited laboratory, with vibration levels increased to 31.3 Grms to simulate the engine’s life time fatigue. The improved actuator passed an engine 550-hour and generator 250-hour qualification test without any issue. The new improved 175 actuator will enter production under model number ADD175HD-24.

GAC has always been committed to accommodate our customers’ special requirements, and will continue to provide solution in helping our customers adapt to today’s ever changing markets and demands.



Controlling Black Exhaust Smoke at Engine Start-up

One of the most obvious issues with standby gen-sets is the large plume of black exhaust smoke emitted during engine start and acceleration.  Many standard electronic governors over-fuel the engine to guarantee starting, the bigger the engine the worst the problem becomes.  If you have multiple engines on site that all start at the same time in response to a mains failure, the amount of black smoke emitted can be very severe. 

GAC offers a reliable, proven solution that eliminates black smoke emissions from gen-sets equipped with mechanical fuel injection systems.  A variety of digital and analog governor controllers include adjustable “START FUEL” and “SPEED RAMPING” features that enable the optimum compromise between start time, acceleration and visual exhaust smoke.

The START FUEL feature sets the initial actuator position (delivered fuel quantity) at the start of cranking and is adjustable from 0 to 100%.  The SPEED RAMPING adjustment sets the rate of acceleration and deceleration between idle and rated speed.  These parameters can be applied to both constant and variable speed applications.

The STARTING FUEL and SPEED RAMPING adjustments control the start characteristics of the engine.  Proper adjustments provide a smooth start with minimum excess fuel to significantly reduce exhaust smoke.

Starting Fuel Adjustment:

Turning the STARTING FUEL adjustment clockwise will increase the amount of fuel delivered to the engine during cranking.  With the adjustment fully counter-clockwise, the amount of fuel delivered will be very low or zero depending upon the actuator and linkage arrangement.  With the adjustment fully clockwise, the actuator will move to the 100% fuel position during cranking. 

Speed Ramping Adjustment:

Turning the SPEEP RAMPING adjustment clockwise will slow the acceleration of the engine, it could take as long as 20 seconds depending on the speed range selected.  With the adjustment fully counter-clockwise, the ramping will effectively be eliminated and acceleration will be immediate.

Idle speed must be set for proper STARTING FUEL and SPEED RAMPING function even if the idle feature is not used.

For the initial start, insure that the STARTING FUEL potentiometer is turned full clockwise (maximum fuel) and the SPEED RAMPING is turned full counter-clockwise (fastest acceleration).

For final adjustment from idle speed, turn the START FUEL counter-clockwise until the engine speed begins to drop.  Increase STARTING FUEL slightly so idle speed is returned to the desired level.

Adjust SPEED RAMPING for the least amount of exhaust smoke during acceleration to rated speed.