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Restrict crankshaft axial play, bear axial thrust and keep the crankshaft in stable position
Part Number
12420021 (OEM original part, standard thickness)
Material
Steel backing with babbitt alloy coating (same as main bearings), featuring excellent wear resistance and impact resistance
Type
Thrust Washer (2 semi-circular pieces per set)
Supply Ability
9999
Applicable Models
MWM TBG620 V12/V16/V20 and TBD620 series gas & diesel engines
Installation Position
Installed on both sides of the 4th main bearing, one piece on the top and one on the bottom
Payment Terms
T/T
Model Number
12420021
Brand Name
MWM DEUTZ
Place of Origin
Germany
12420021 is a standard size crankshaft thrust washer for DEUTZ MWM 620 series engines. It limits the axial movement of the crankshaft and is used together with main bearings 12420020 / 12420022.
1. Basic Information
Part Number: 12420021 (OEM original part, standard thickness)
Type: Thrust Washer (2 semi-circular pieces per set)
Applicable Models: MWM TBG620 V12/V16/V20 and TBD620 series gas & diesel engines
Material: Steel backing with babbitt alloy coating (same as main bearings), featuring excellent wear resistance and impact resistance
Function: Restrict crankshaft axial play, bear axial thrust and keep the crankshaft in stable position
Installation Position: Installed on both sides of the 4th main bearing, one piece on the top and one on the bottom
Original Reference Price (2026): Approximately €85–95 per set (exclusive of tax)
Related Parts:
12420020 / 12420022: Matching main bearings
12420024: Connecting rod bearing
2. Technical Parameters & Installation
Standard Axial Clearance: 0.10–0.20 mm. Replace the washer if the clearance exceeds the specified range.
Installation Direction: Place the grooved side against the thrust surface of the crankshaft, and the plain side against the cylinder block. Keep the locating tabs facing outwards.
Common Failures: Alloy layer wear, peeling and ablation, which will cause excessive crankshaft axial movement, abnormal noise and severe vibration.
Overhaul Interval: Replace together with main bearings and connecting rod bearings every 8000–10000 operating hours.