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B-Series Engine

The B-Series is an engine. It powers generator sets from Admiral, including the Platinum.

Also known as: B-Series

On this pageSpecs Generator sets Maintenance FAQ Torque & specs Procedures Wiring

Engine specifications

Generator sets powered by this engine

Admiral Platinum

Common problems

UNSTABLE OUTPUT VOLTAGE AT STABLE OPERATING SPEED
Fix: Replace voltage regulator VR21 if the connected circuits are okay. Check connections and wiring continuity in all circuits connected to the voltage regulator (exciter, alternator, PMG, voltage trimmer and field circuit breaker). Service as necessary. Replace voltage adjusting rheostat R21 if it is open.
UNBALANCED OUTPUT VOLTAGE
Fix: Disconnect all loads from the generator set. Is output amperage still unbalanced? Redistribute the load so that there is less than 10 percent variation between phases. Check for proper grounded neutral connections. Yes No Check each stator winding for continuity and service as described under Generator Testing and Service. Check the alternator output terminals and reconnect, if necessary, per the appropriate reconnection diagram. Check for proper grounding of the neutral terminal. Check the loads for ground faults and service as required.
The common or individual circuit breaker opens the fuel solenoid valve circuit to shut down the engine.
Fix: The circuit breaker has to be reset to restore operation.
OUTPUT VOLTAGE TOO HIGH OR TOO LOW
Fix: Replace voltage regulator VR21. Adjust engine speed as described under Engine Control. Check and service the rotating diode assembly as described under Generator Testing and Service. Adjust voltage regulator VR21 as described under AC Control. Check the alternator output terminals and reconnect, if necessary, per the appropriate reconnection diagram (Page 8-7).
No output voltage at stable operating speed (SELF-EXCITED GENERATORS)
Fix: Reset CB21. Does that restore AC output? Has field circuit breaker CB21 tripped? Remove one lead from CB21 and test for continuity across the terminals. Replace CB21 if it is open. Does that restore AC output? Refer to the following flow charts if the voltage is unstable, too high or too low, or CB21 keeps tripping. Is there at least 5 VAC across Terminals 22 and 23 on terminal board TB21 inside the control cabinet? Replace voltage regulator VR21. Is there at least 9 VDC across terminals X and XX on voltage regulator VR21 (all loads disconnected)? Check for shorted exciter field wiring or windings. Service as described under Generator Testing and Service. Check for open exciter field wiring or windings. Service as described under Generator Testing and Service. Check exciter rotor, main rotor and stator windings. Service as described under Generator Testing and Service. Check diodes CR1 through CR6 on the rotating rectifier assembly. Service as described under Generator Testing and Service.
No output voltage at stable operating speed (PMG-EXCITED GENERATORS)
Fix: Check connections and wiring continuity between voltage regulator VR21, the Auxiliary Terminal Board on the back of VR21, and the PMG. Service as described under Generator Testing and Service. Does that restore AC output? Has field circuit breaker CB21 tripped? Reset CB21. Does that restore AC output? Remove one lead from CB21 and test for continuity across the terminals. Replace CB21 if it is open. Does that restore AC output? Refer to the following flow charts if the voltage is unstable, too high or too low, or CB21 keeps tripping. Is there at least 150 VAC across Terminals P2, P3 and P4 on voltage regulator VR21? Replace voltage regulator VR21. Is there at least 9 VDC across terminals X and XX on voltage regulator VR21 (all loads disconnected)? Check for shorted exciter field wiring or windings. Service as described under Generator Testing and Service. Check for open exciter field wiring or windings. Service as described under Generator Testing and Service. Check exciter rotor, main rotor and stator windings. Service as described under Generator Testing and Service. Check diodes CR1 through CR6 on the rotating rectifier assembly. Service as described under Generator Testing and Service.
NO OUTPUT THROUGH MOUNTED LINE CIRCUIT BREAKER
Fix: If the circuit breaker is in the tripped position, determine the cause; whether overload, ground fault or shunt trip. Service as required. If the circuit breaker is in the OFF position, find out why, and make sure the set is in operating condition and available for use before throwing the switch ON.
FIELD CIRCUIT BREAKER KEEPS TRIPPING
Fix: Replace voltage regulator VR21. Does AC output voltage build up to at least 150 percent of rated output before the breaker trips? Check the rotating diode assembly, exciter stator winding, exciter rotor winding, rotor field winding and main stator winding. Service as described under Generator Testing and Service. Check connections and wiring continuity in all circuits connected to voltage regulator VR21 (exciter, alternator, PMG, voltage trimmer and field circuit breaker). Service as described under Generator Testing and Service. Check the alternator output terminals and reconnect, if necessary, per the appropriate reconnection diagram. Yes No Adjust voltage regulator VR21 as described under AC Control.
Engine runs until fault shutdown
Cause: 1. The Overspeed circuit breaker has tripped. 2. The Low Oil Pressure or Low Oil Level circuit breaker has tripped. 3. The High Engine Temperature or Low Coolant Level circuit breaker has tripped. 4. The High Exhaust Temperature circuit breaker has tripped.
Fix: Service and adjust the engine governor. See Engine Control. If the governor is functioning properly, readjust the electronic overspeed module to the proper setting. See Engine Control. Refill with as much engine oil as necessary and repair any leaks before putting the set back into service. Start the engine and note the pressure indicated by the control panel gauge. If engine oil pressure is greater than 15 PSIG, the low oil pressure cutout switch is faulty and must be replaced. If engine oil pressure is less, service the lubricating oil system according to the engine service manual. Refill with as much engine coolant as necessary and repair any leaks before putting the set back into service. Clean out the sea water strainer and make sure the sea water cock is fully open if the engine has a heat exchanger. Start the engine and note the temperature indicated by the control panel gauge. If engine temperature is less than 205 F, the high engine temperature cutout switch is faulty and must be replaced. If engine temperature is greater, service the engine cooling system according to the applicable engine service manual. Clean out the sea water strainer, make sure the sea water cock is fully open, replace the sea water pump impeller and clean out the heat exchanger in accordance with the engine Operation Manual. Inspect the entire exhaust system and replace any damaged parts.
ENGINE DOES NOT CRANK
Cause: The batteries are worn out or discharged, the terminal connectors are loose or corroded or the battery cables are corroded.; Control circuit fuse F101 is blown.; The local or pilot house Start / Run / Stop switch is faulty.; Crank relay K104 or run relay K105 is faulty.; The starter motor, motor solenoid, wire or connector is faulty.
Fix: Service or replace the batteries, terminal connectors and cables. Specific gravity for a fully charged battery is approximately 1.260 at 80° F (27° C).; Service the engine-driven battery charging alternator in accordance with the engine service manual if normal battery charging voltage is not between 13 and 14 volts for 12 volt systems and between 26 and 28 volts for 24 volt systems.; Replace the fuse with one of the same type and amp rating.; Remove the control box cover and push the control switch to Start and hold it there. Replace the switch if it is open (infinite resistance) between terminals 2 and 3.; Remove the control box cover and push the control switch to Start. Replace either relay if it does not ‘click’. Repeat the test to make sure.; Push the control switch to the Start position and hold it there. Check for battery voltage at the starter motor solenoid terminal. Service the starter motor or solenoid in accordance with the engine service manual if there is battery voltage at the terminal. If there is no voltage repair the wire (yellow/orange) or terminal 8 of connector J1/P1.
ENGINE CRANKS BUT DOES NOT START
Cause: The fuel supply tank is empty.; The electronic governor or fuel solenoid valve K118 does not function.; Engine temperature is too low for starting.; Cranking speed is too slow because of low battery charge, loose or corroded terminal connectors, corroded battery cables or too much starter solenoid contact resistance.; The fuel system has lost prime, the fuel lines or filters are plugged, the fuel lift pump is not working, the fuel is contaminated or the air filter is plugged.; The engine fuel injection system is faulty.
Fix: Fill the fuel supply tank with the appropriate grade of fuel.; The fuel solenoid valve (threaded into the fuel injection pump unit) should ‘click’ when the panel switch is pushed to the Start position. The electronic governor should also drive the fuel injection pump unit to the full power fuel position. Both are powered through engine block terminal T26 (located just below the injection unit). Service the electronic governor if there is battery voltage at terminal T26 during cranking but it does not function. See Engine Control. Replace the fuel solenoid if it does not function.; If there is no voltage at terminal T26, check wires and connectors. Remove the control box cover, if necessary, to checkout run relay K105. It should ‘click’ when the control switch is pushed to Start. Repeat the test to make sure.; Plug in, repair or install engine coolant and engine oil heaters. Replace the engine oil if it is not of the recommended viscosity for the ambient temperature.; Service the batteries, terminal connectors, cables or starter solenoid. Cable, terminal or solenoid contact resistance is too high if there is more than 1 volt drop between battery and motor terminals for 12 volt systems and 2 volts drop for 24 volt systems while the engine is cranking.; Service the engine-driven battery charging alternator in accordance with the engine service manual if normal.

Compiled from service & troubleshooting documentation across every generator set that uses the B-Series.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter			—
Fuel filter			—
Oil filter			—
Battery			—
Belt			—
Coolant			—
Coolant filter			—
Hydraulic filter			—
Oil			—
Spark plug			—

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Service specifications

Type	Item	Value	Unit	Condition
Gap	Low idle speed stop to governor control lever gap (Type B / Type C linkage)	approximately 1/16	inch	set not operating
Other	Acceptable speed overshoot after releasing throttle from minimum speed	Two to five	Hertz	governor adjustment
Other	Battery specific gravity, fully charged	approximately 1.260		at 80° F (27° C)
Other	DROOP pot factory preset	five percent droop at full load and zero power factor	%	generators operated in parallel
Other	Maximum battery-to-motor voltage drop while cranking (12 volt systems)	no more than 1	volt	while engine is cranking
Other	Maximum battery-to-motor voltage drop while cranking (24 volt systems)	no more than 2	volts	while engine is cranking
Other	Maximum phase-to-phase output amperage unbalance	less than 10 percent variation between phases	%	loads connected to the generator set
Other	Output voltage trimmer (R21) adjustment range	plus or minus five percent of nominal voltage	%
Other	UFRO threshold frequency (typical)	59 Hz for 60 Hz applications and 49 Hz for 50 Hz applications	Hz
Pressure	Engine oil pressure above which low oil pressure cutout switch is faulty (per troubleshooting)	greater than 15	PSIG
Pressure	Low oil pressure cutout switch - if engine oil pressure is greater than this value the switch is faulty	15	PSIG
Pressure	Low oil pressure switch shutdown threshold	14 ±2	psi
Pressure	Oil pressure latching switch (S107) minimum to keep run relay energized	at least 4	psi
Pressure	Oil pressure latching switch S107 minimum oil pressure	at least 4	psi
Resistance	Exciter rotor winding resistance (P/N 220-4289-31)	0.167	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Exciter rotor winding resistance (P/N 220-4289-33)	0.180	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Exciter rotor winding resistance (P/N 220-4298-33)	0.210	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Exciter stator winding resistance (P/N 220-4289-31)	20.3	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Exciter stator winding resistance (P/N 220-4289-33)	19.5	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Fully charged battery specific gravity	approximately 1.260	specific gravity	at 80 F (27 C)
Resistance	Main rotor winding resistance (P/N 220-4289-31)	0.57	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4289-32)	0.64	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4289-33)	0.67	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4289-34)	0.80	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4289-45)	0.93	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4298-31)	1.11	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4298-32)	1.20	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4298-33)	1.31	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4298-34)	1.50	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4298-35)	1.66	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main rotor winding resistance (P/N 220-4298-36)	1.80	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4289-31)	0.170	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4289-32)	0.129	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4289-33)	0.110	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4289-34)	0.069	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4289-45)	0.055	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4298-31)	0.062	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4298-32)	0.047	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4298-33)	0.033	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4298-34)	0.025	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4298-35)	0.022	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	Main stator winding resistance (P/N 220-4298-36)	0.016	ohms	approximate, plus or minus 10 percent at 68 F (20 C)
Resistance	PMG winding resistance (each winding, across P2-P3, P2-P4, P3-P4)	approximately 4.4	ohms
Resistance	PMG winding resistance across P2-P3, P3-P4, P4-P2	approximately 4.4	ohms
Resistance	Winding insulation resistance (exciter stator, exciter rotor, main rotor, main stator) - replace if less	1	megohm
Resistance	Winding insulation resistance (exciter stator, exciter rotor, main rotor, main stator) - replace if less than	1	megohm (1,000,000 ohms)
Speed	Engine RPM to frequency relationship	engine RPM is 30 times Hz	RPM
Speed	Engine speed at 50 Hz	1500	RPM	50 Hz
Speed	Engine speed at 60 Hz	1800	RPM	60 Hz
Speed	Governor droop	within five percent of nominal frequency (3 Hertz for 60 Hertz sets and 2.5 Hertz for 50 Hertz sets)
Speed	Mechanical governor droop	within five percent of nominal frequency (3 Hertz for 60 Hertz sets and 2.5 Hertz for 50 Hertz sets)	Hz	full load, normal operating temperature
Speed	Overspeed cutout adjustment	1800 to 1900	RPM	50 Hz sets
Speed	Overspeed cutout adjustment	2100 to 2200	RPM	60 Hz sets
Speed	Overspeed cutout adjustment (50 Hz sets)	1800 to 1900	RPM
Speed	Overspeed cutout adjustment (60 Hz sets)	2100 to 2200	RPM
Speed	Rated speed / output frequency 50 Hz sets	50 Hertz (1500 RPM)	RPM
Speed	Rated speed / output frequency 60 Hz sets	60 Hertz (1800 RPM)	RPM
Speed	Throttle lever speed adjusting screw test speed	1650	RPM	55 Hertz, 50 Hertz sets
Speed	Throttle lever speed adjusting screw test speed	1980	RPM	66 Hertz, 60 Hertz sets
Speed	Throttle speed adjusting screws setting (50 Hertz sets, Type A linkage)	1680 RPM (56 Hertz)	RPM	engine at normal operating temperature, all loads disconnected

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

Automatic Voltage Regulator Voltage and Stability Adjustments adjustment

⚠ High voltage. Touching uninsulated high voltage components and terminals on the voltage regulator can result in severe personal injury or death.

⚠ The sealed adjustment pots on the voltage regulator board are factory preset. Attempts to adjust them can lead to serious voltage instability and overheating.

Tools: AC/DC multimeter

Use the voltage trimmer for small voltage adjustments; measure voltage across any line and neutral with the set at no load and nominal frequency.
If trimmer adjustment is insufficient, lock it at midpoint and turn the VOLTS pot fully counterclockwise and the STABILITY pot to its midpoint.
If the red LED lights, refer to Jumper Reconnections and UFRO Adjustment.
Turn the VOLTS pot clockwise until rated voltage is obtained.
If voltage becomes unstable with a large load, turn the STABILITY pot clockwise until stable; readjust the VOLTS pot each time.
Set the RESPONSE jumper A to C for rated output less than 90 kW or B to C for rated output greater than 90 kW.
Set frequency jumper connections to correspond to the application frequency.

Electric Governor (Type I) Adjustment adjustment

Push both selector switches S1 and S2 on the controller to their OFF positions.
Set the pots initially: Gain 20%, I 20%, D 30%, Droop 0%.
If a remote speed pot is used, set it at its midpoint.
Start the set and adjust the Speed pot to obtain 60 Hertz (1800 RPM) or 50 Hertz (1500 RPM); warm up under load.
Disconnect the load and turn the GAIN pot to 100 percent or until unstable, then counterclockwise until stable.
Adjust D as in the previous step.
Adjust I as in the previous step.
Readjust Speed if necessary.
Push throttle to minimum speed and release; turn the I pot clockwise slightly to reduce overshoot or counterclockwise if the set hunts.

Electric Governor (Type II) Adjustment adjustment

Turn the Start Fuel Limit pot fully clockwise and leave it in that position.
Set the pots initially: Gain mid-position, Stability mid-position, Rated Speed fully counterclockwise.
If a remote speed pot is used, set it to the fully counterclockwise position.
Start the set and adjust the Rated Speed pot to obtain 60 Hertz (1800 RPM) or 50 Hertz (1500 RPM); warm up under load.
Disconnect the load and turn the Gain pot fully clockwise or until unstable, then counterclockwise until stable.
Adjust Stability as in the previous step.
Readjust Rated Speed if necessary.
Observe speed overshoot; turn the Gain pot clockwise slightly to reduce overshoot or the Stability pot counterclockwise if the set oscillates.

Electric Governor Controller Adjustment adjustment

Push both selector switches (S1, S2) on the controller to their OFF positions.
Set pots initially: Gain 20%, I 20%, D 30%, Droop 0%.
If a remote speed pot is used, set it at its midpoint.
Start the set and adjust the Speed pot for required frequency: 60 Hertz (1800 RPM) or 50 Hertz (1500 RPM); warm up under load.
Disconnect the load and turn the GAIN pot to 100 percent or until operation becomes unstable, then turn counterclockwise until stable.
Adjust the D pot as in Step 5.
Adjust the I pot as in Step 5.
Readjust Speed if necessary.
Manually push the throttle to minimum speed, hold until the engine reaches minimum speed, release and observe speed overshoot.

Linkage Adjustments (Type A) adjustment

Tools: wrenches

Loosen the locknut on both throttle speed adjusting screws.
Adjust both screws to obtain 2010 RPM (67 Hertz) for 60 Hertz sets or 1680 RPM (56 Hertz) for 50 Hertz sets.
Set the locknuts and stop the set.
Thread the locknut onto the male swivel-end link, thread the female link five turns onto the male link and set the locknut.
Secure the male end of the link to the injection pump lever on the engine side of the pump.
Loosely thread the locknut and clevis onto the actuator shaft.
Rotate the injection pump lever toward the front of the engine, connect the clevis and link, and tighten the clevis locknut.

Linkage Adjustments (Type B) adjustment

Tools: wrenches

With the set not operating, check there is approximately a 1/16 inch gap between the low idle speed stop and the governor control lever.
Loosen the lock nut and turn the actuator shaft assembly.
Tighten the lock nut after the proper gap is obtained.

Linkage Adjustments (Type C) adjustment

Tools: wrenches

With the set not operating, check there is approximately a 1/16 inch gap between the low idle speed stop and the governor control lever.
Loosen both lock nuts and turn the threaded rod.
Tighten the lock nuts after the proper gap is obtained.

Mechanical Governor Adjustments adjustment

Turn the governor idle and speed adjusting screws while the engine runs at normal operating temperature under full load.
Adjust droop to within five percent of nominal frequency (3 Hertz for 60 Hertz sets, 2.5 Hertz for 50 Hertz sets).
Check operation under various loads and increase droop if the governor hunts.
Readjust full-load frequency if droop is adjusted.

Throttle Lever Position and Linkage Adjustment adjustment

⚠ Do not adjust the idle speed screw or break its wire seal. Doing so can void the generator set warranty.

Operate the set and disconnect all loads after engine warms to normal operating temperature.
Loosen locknut on throttle lever speed adjusting screw; turn screw counterclockwise to 1980 RPM (66 Hz) for 60 Hz sets or 1650 RPM (55 Hz) for 50 Hz sets.
Set the locknut; leave the spring in place to maintain throttle lever position.
Move fuel pump stop lever (inboard lever) forward slowly until the engine stops; hold this stop position when linkage is connected.
Thread locknut onto male swivel-end link; thread female link five turns onto male link and set the locknut.
Secure male end of link to the injection pump lever on the engine side of the pump; tighten two nuts first.
Loosely thread the locknut and clevis onto the actuator shaft.
Rotate the injection pump lever to the established stop position; turn the clevis until the link swivel hole registers with the clevis holes; connect with screw, nut and lock washer.
Tighten the clevis locknut on the actuator shaft.

Voltage and Voltage Stability Adjustments (AVR) adjustment

⚠ Hazardous voltage - measurements and adjustments must be done with care to avoid touching hazardous voltage parts.

Tools: insulated tools

Measure voltage across any line and neutral with the generator running without load at nominal frequency.
If the trimmer does not provide enough adjustment, lock it at its midpoint.
Turn the VOLTS pot fully counterclockwise and the STABILITY pot to its midpoint.
If the red LED on the board lights, refer to Jumper Reconnections and UFRO Adjustment.
Turn the VOLTS pot clockwise until rated voltage is obtained.
If voltage becomes unstable with a large load, turn the STABILITY pot clockwise until stable, and recheck and readjust the VOLTS pot each time.

Governor Service diagnostic

Tools: AC voltmeter (at least 5000 ohms/volt impedance)

Push the fuel injection pump lever to full power by hand; there should be no binding in the linkage.
If the actuator does not drive to full power, disconnect the two actuator leads and connect battery voltage across them; replace the actuator or control unit as indicated.
If speed is still unstable, reinstall the magnetic speed pickup: bar the engine until a gear tooth aligns, thread the unit in by hand, back out one quarter turn and set the locknut.
Measure speed pickup output voltage while cranking with leads reconnected via bare wire links and fuel solenoid disconnected.
Replace the speed pickup if the meter indicates less than 2.5 volts; replace the control unit if voltage is at least 2.5 volts.
Follow each lead out of the governor control unit to its connector; tighten or repair any loose, dirty or corroded connector and try to start.

Servicing the PMG - Testing diagnostic

⚠ Hazardous voltage - touching uninsulated high voltage parts can result in severe personal injury or death.

Tools: AC-DC multimeter, Wheatstone bridge or digital ohmmeter

Disconnect leads P2, P3 and P4 from the voltage regulator.
Start the engine at the set and let the speed stabilize; release the Start switch as soon as the engine fires.
Measure voltage across lead pairs P2-P3, P3-P4 and P4-P2; should be at least 150 VAC for 50 Hz sets and 180 VAC for 60 Hz sets.
Stop the set and measure resistance across each lead pair; each winding should be approximately 4.4 ohms.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Voltage reconnection

Voltage	Phase	Connection	Leads	Notes
		Frequency jumper, PMG-excited voltage regulator, 50 Hz	3-2
		Frequency jumper, self-excited voltage regulator, 50 Hz	C-50
		K142 jumper for normal operation
		Response jumper, rated output under 90 kW	A to C
		Self-excited voltage regulator jumpers must be	2-4-5 and 6-7

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

Which generators use the B-Series engine?

The B-Series powers 1 generator set(s), including Admiral Platinum.

What is a common problem with the B-Series engine?

A commonly reported issue on generators using the B-Series is: UNSTABLE OUTPUT VOLTAGE AT STABLE OPERATING SPEED. Fix: Replace voltage regulator VR21 if the connected circuits are okay. Check connections and wiring continuity in all circuits connected to the voltage regulator (exciter, alternator, PMG, voltage trimmer and field circuit breaker). Service as necessary. Replace voltage adjusting rheostat R21 if it is open..