Fluidampr 720221 7.3L Powerstroke Fluidampr Harmonic Fluid Damper

Fluidampr 720221 Ford 7.3L Powerstroke Diesel Performance Harmonic Damper

The Fluidampr 720221 Harmonic Fluid Damper applications:

• Early 1994 to 1997 Ford F250 vehicles with the 7.3L Powerstroke.
• Early 1994 to 1997 Ford F350 vehicles with the 7.3L Powerstroke.

The Fluidampr 720221 7.3L Powerstroke Vibration Damper Harmonic Fluid Dampers Specifications:

• SFI 18.1 Safety Rating Approved
• Material = Steel
• Coated in a Black Zinc Chromate Finish
• Outside Diameter is 7.25."
• Unit Weighs 18 pounds.
• Balance = External
• Includes the fan spacer for clearance.

Fluidampr 720221 viscous vibration damper benefits:

• Stabilizes valve train operation at all RPM levels.
• Protect against destructive Torsional Vibrations.
• Designed for Stock to Extreme powered Powerstroke engines.
• Increase both Horsepower and Torque output.
• Reduces wear on the Timing Gear and Main Bearings
• Damper reduces the risk of crankshaft failure.

High performance diesel engines with increased power levels are extremely vulnerable to torsional vibrations so install a Fluidampr 720211.

The Fluidampr 720221 Harmonic Fluid Damper eliminates the torque spike and controls those destructive vibrationsproduced each time the air/fuel mixture inside a cylinder ignites.

Fluidampr7.3L Powerstroke Harmonic Dampers is MADE IN THE USA!

• Engine: 7.3L Powerstroke
• Power Level: Stock to Highly Modified diesel engines
• Item Number: Fluidampr 720221
• Make: Ford
• Model: F250 | F350
• Year: 1994 | 1995 | 1996 | 1997
• Manufacturer Part No: 720221
• Product Application: 1994 to 1997 Ford 7.3L Powerstroke
• Height: 8
• Width: 12
• Brand: Fluidampr
• FAQ: Do I really need to change the crankshaft damper on my 7.3L Powerstroke diesel engine?  The harmonic damper is a wear item and needs to be replaced over time. If you have changed the power level of your 7.3L diesel engine we strongly recommend the installation of a Fluidampr performance diesel damper on your engine as the OEM damper was designed for stock power levels only. Why should I purchase a fluidampr viscous damper for my engine? The Viscous Performance Diesel Damper for 7.3L Powerstroke Diesel Engine provides control of the destructive torsional vibration on a stock or modified engine. The torsional vibrations present a higher risk for damage, so a viscous damper is an absolute must on these motors. Only a Fluidamper viscous damper protects the engine from destructive crankshaft torsional vibration.
• Part Number: 720221
• Manufacturer: Fluidampr
• Product Note: Only a Fluidampr Viscous performance diesel damper can effectively control the destructive torsional vibrations at all engine RPMs and power levels.

The Original Fluidampr Performance Diesel Installation

Step 1 – Tools & Procedures

• Proper key if required

• Anti-seize compound

• Removal & installation tool if required (Damage from improper installation will void your warranty)

• Do not use hammers/pry bars or heat to install or remove Fluidampr. (This will void your warranty and may cause engine damage)

• Honing or machining Fluidampr bore is not recommended (on applicable applications). A diametrical press fit (on press fit only dampers) of .0005” - .0015” is recommended for proper damper function. Using a micrometer, make sure to measure the crank snout and inner bore of Fluidampr to assure a proper fit.

• Sufficient torque wrench (see torque specs on page 2), fan removal tools, flywheel holding tool (if required).

CAUTION: For high horsepower applications we recommend the following:

Engine Engine Power/RPM Recommended Kit Part #

Cummins 5.9L 6.7L 3500+ RPM Fluidampr Drill Pin Kit 300002

Cummins 5.9L 6.7L Above 700HP/1250 ft⋅lb Fluidampr Full Power Kit 300008

Fluidampr Drill Pin Kit 300002

Cummins 5.9L 6.7L Under 700HP/1250 ft⋅lb Fluidampr High Strength

Bolt Kit 300007

1989-2002 Cummins Under 700HP/1250 ft⋅lb Fluidampr High Strength

5.9L Fluidampr w/.350” Bolt Kit 300009

Flange Thickness*

Duramax 6.6L 500 HP & Above Fluidamper High Strength

Bolt Kit 300010

Fluidampr recommends 750+ HP applications to recheck bolt torque after every run/pull

*If you need assistance determining which flange type you have, please contact Fluidampr tech Support.

Step 2 – Balancing - Internally and Externally Balanced Engines

REPLACING THE DAMPER

Fluidampr counterweights for external balanced engines have been designed to OEM specifications. If the damper being replaced has never been altered, Fluidampr can be installed with no additional balancing. (see page 2 for whether your Fluidampr is internally or externally balanced)

BALANCING OR MATCH BALANCING

o Each Fluidampr component is precision balanced during manufacturing. NO additional balancing is required.

o DO NOT ATTEMPT TO BALANCE THE CRANKSHAFT WITH FLUIDAMPR INSTALLED. The inertia ring inside a Fluidampr is balanced to a close tolerance at the factory. It rotates inside the damper.

o DO NOT DRILL FLUIDAMPR – The inertia ring and silicone fluid are in a hermetically sealed housing. Drilling may cause the damper to leak and lead to damper failure, voiding the warranty.

o If balancing the crankshaft is required, install the stock damper while balancing.

Step 3 – Removal

• Remove fan and shroud as per manufacturer’s instructions, draw sketch of belt routing if required and remove the accessory drive belt.

• Dodge Cummins 5.9L (1992 to 1998). BEFORE REMOVING THE STOCK DAMPER, rotate the engine so that the magnetic pick up is not on one of the notches in the outside diameter of the stock damper. If you do not have access to the gap spec, use a feeler gage to measure and record the gap between the magnetic pick up and the stock damper.

• Remove the stock damper per factory/service manual instructions.

Step 4 – Fluidampr Installation

o On engines that the damper slides or presses onto the crankshaft, carefully remove burrs, scratches, or nicks on the crank snout by filing or polishing the snout so that it is smooth and free of surface irregularities. Remove any sharp keyway corners. The key should fit snugly in the keyway on the crank. A heavy press fit creates high stress on the slot and should be avoided. Replace or modify the key if it is too tight or too loose. For bolt-on dampers, clean crankshaft threads, crankshaft mating surface and center pilot thoroughly before installation.

o Cummins installation notes:

• Fluidampr P/N 920301 includes tone wheel. Remove OEM tone wheel prior to Fluidampr installation.

• Fluidampr P/N 920301/920321/980301 – Install damper w/ the smaller of the (2) pin holes on the crankshaft pin. Check crankshaft thread depth to ensure proper bolt length prior to installation.

• Thread bolts into crankshaft fully with washer installed. Space between washer and crankshaft should be less than 0.495” (Fluidampr flange thickness with integrated tone wheel). If the length is over 0.495”, contact Fluidampr Tech Service. Minimum thread engagement = .750”

o Coat crankshaft snout and damper bore with anti-seize compound or moly grease to prevent galling during installation.

o Fluidampr P/N 760131 comes with a hardened crankshaft washer with clearance for the GM 3.200” bolt circle pattern, this replaces the factory crankshaft bolt washer.

o For Ford Power Stroke 6.0L: The belt must be routed between the Fluidampr and the water pump pulley before the Fluidampr is installed.

o Install the Fluidampr and torque the bolt or bolts properly as per the original manufacturers’ torque or torque to yield requirements. Consult a dealer to determine if your application is torque to yield, see below chart for torque specs.

o Fluidampr recommends that crank bolt(s) always be replaced with new OEM or Fluidampr bolt kits.

o Install the accessory drive belt, fan and shroud as per manufacturer’s instructions. Re-torque crankshaft bolt(s) after engine warm-up cycle.

Part# Balance Engine Fitment Years OEM Bolt Torque*

720211 External Ford 7.3L 1999 – 2003 212 Ft-Lbs.

720221 External Ford 7.3L 1994 – 1997 212 Ft-Lbs.

(See #4NFJ for fan spacer installation instructions)

870201 External Ford 6.0L 2003 – 2007 50 Ft-Lbs. plus an additional 90 degrees*

870211 External Ford 6.0L 2003 – 2007 50 Ft-Lbs. plus an additional 90 degrees*

800211 External Ford 6.4L 2008 – 2010 50 Ft-Lbs. plus an additional 90 degrees*

800221 External Ford 6.7L 2011 – Present 22 Ft-Lbs. plus an additional 90 degrees*

800141 External GM Hummer 6.2L/6.5L 1994 – 2000 See Owner’s Manual

800191 External GM 6.2L/6.5L 1982 – 1993 See Owner’s Manual (Must use included spacer)

830111 External Duramax 6.6L LBZ/LMM 2006 – 2010 74 Ft-Lbs. plus an additional 105 degrees*

830121 External Duramax 6.6L LML/LGH 2010.5 – 2016 74 Ft-Lbs. plus an additional 90 degrees*

890101 External Duramax 6.6L LLY/LB7 2001 – 2005 74 Ft-Lbs. plus an additional 105 degrees*

760131 Internal Duramax 6.6L 2001 – Present 74 Ft-Lbs. plus an additional 105 degrees*(P/N 760131 is a press fit onto the internally balanced crankshaft, comes w/ 2 keyways 5mm & 1/4")

920301 Internal Dodge Cummins 5.9L 2003 – 2009 92 Ft-Lbs.

920321 Internal Dodge Cummins 6.7L 2007.5 – Present 92 Ft-Lbs.

960301 Internal Dodge Cummins 5.9L 1998.5 – 2002 92 Ft-Lbs.

960311 Internal Dodge Cummins 5.9L 1989 – 1998 92 Ft-Lbs.

(See #4NFH for sensor relocation kit installation instructions)

960341 Internal Dodge Cummins 5.9L/6.7L Competition Series 92 Ft-Lbs.

980301 Internal Dodge Cummins 5.9L/6.7L Competition Series 92 Ft-Lbs.

WARNING: FAILURE TO USE PROPERLY TORQUED BOLTS WILL VOID WARRANTY AND COULD RESULT IN DAMPER, KEY, OR CRANK DAMAGE. ONLY USE THESE TORQUE VALUES WHEN INSTALLING DAMPER WITH OEM BOLTS. *BOLTS ARE TORQUE TO YIELD AND NEW BOLTS MUST BE USED EVERYTIME