1556186 Companion Flange | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta companion flange is a centred rotating-drive or coupling component used in the front engine companion-flange connection. It is manufactured to the original Volvo Penta dimensions and interface requirements so the driven component remains concentric, aligned and securely coupled. In service, it forms the front companion flange interface between the matched shaft and driven assembly. Fitment is controlled by the exact engine or product configuration and serialised parts list; confirm OEM number 1556186 against the installed assembly before ordering.

🚤 Compatibility

• Engine Family: TAD, TWD, TAMD, TD, DH
• Serial Range: (M12) SN2071162026-., M12

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1556186
• M12 configuration
• System group: Fuel System
• Net weight: 0.59 kg
• Fits TAD, TAMD, TWD, TD and DH series marine and industrial diesel engines

🔌 Function

Forms the front companion flange interface between the matched shaft and driven assembly. Inspect keyways, splines, shafts, fasteners and mating faces; verify run-out, alignment, backlash where applicable and specified torque before operation.

⚠️ Common Signs of Failure

• Vibration or run-out through the driveline under load
• Elongated, worn or corroded bolt holes at the flange face
• Loose, stretched or sheared flange bolts
• Visible cracking, pitting or corrosion on the flange body or mating face
• Fretting marks or scoring on the mating surface indicating relative movement

🛠️ Service Notes

• Clean the taper, key and keyway dry before assembly and check them for burrs, wear and hammer marks; the flange must pull up on the taper, not on the key
• Check the flange face for scoring, corrosion and runout, and the coupling bolt holes for elongation — a distorted flange shows up as vibration under way
• Where a shaft seal runs on the flange, check that running surface is smooth and unworn, because a scored surface will destroy a new seal
• Fit a new locking nut, tab washer or split pin as originally used, and tighten to the figure given in the workshop manual for your installation
• Check shaft alignment and face contact across the coupling after fitting, and re-check the fasteners after the first period of running

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
• Volvo Penta TAD1030P, TAD1030G, TAD1030GE, TAD1030V
• Volvo Penta TAMD165A, TAMD165C, TAMD165P
• Volvo Penta TAD1031G, TAD1031GE
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAMD122P-A, TAMD122P-B
• Volvo Penta DH10A
• Volvo Penta TAD1032GE
• Volvo Penta TAMD102D
• Volvo Penta TAMD163P-A
• Volvo Penta TAMD63P-A
• Volvo Penta TAMD75P-A
• Volvo Penta TD164KAE
• Volvo Penta TWD1031VE