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{"title":"Cat 3412 BRAKE,DISC CALIPER HYD 139-5620 (MICO) 02-520-202","imgUrl":"https:\/\/img.chinax.com\/nimg\/bc\/e0\/0647c4ab9d174ac736124f45c4e6-200x200-1\/cat_3412_brake_2cdisc_caliper_hyd_139_5620_0a_28mico_29_02_520_202.jpg","attrs":{"Brand":"MICO, USA (a professional manufacturer of heavy-duty industrial brakes)","Place of Origin":"USA","Price":"6319","Minimum Order Quantity":"1"}}
Alloy layer peeling, bearing seizure and excessive wear. Inspect the roundness and surface roughness of the crankshaft journal during replacement.
Lubrication Requirement
Use original MWM SAE 40 special engine oil for gas engines. Normal oil pressure: 4–6 bar.
Payment Terms
T/T
Fitting Clearance
0.18–0.25 mm (standard). Too small clearance may cause bearing seizure, while excessive clearance will lead to vibration and oil leakage.
Delivery Time
15days
Installation Direction
Place the side with oil grooves towards the crankshaft, and align the locating tabs of upper and lower shells to avoid displacement.
Packaging Details
Original packaging
Supply Ability
9999
Brand Name
MWM DEUTZ
Model Number
12420022
Place of Origin
Germany
Basic Information
Part Number: 12420022
Product: Standard size Main Bearing
Application: DEUTZ MWM TBG620 V16(6002), also compatible with TBG620 V12/V20 and TBD620 series diesel engines
Structure: A full set of upper and lower bearing shells
Material: Bimetallic construction with steel backing and babbitt alloy layer, featuring excellent wear resistance and impact resistance
Journal Diameter: φ170 mm
Function & Application
It supports the crankshaft, reduces friction and withstands combustion impact loads. Widely used in CHP, natural gas and biogas power generation units.
Recommended replacement interval: 8000 - 10000 operating hours during major overhaul.
Related Parts
12420020: Alternative standard main bearing
12420024: Connecting rod big end bearing
Installation & Maintenance
Standard clearance: 0.18–0.25 mm
Installation: Install the oil groove side towards the crankshaft, align positioning tabs correctly
Lubrication: Use dedicated SAE 40 engine oil. Normal oil pressure: 4–6 bar
Common issues: Alloy layer peeling, bearing seizure and excessive wear. Inspect crankshaft journal condition when replacement is needed.
Ordering Notice
Please verify the engine model TBG620 V16(6002) before purchase. Distinguish main bearing 12420022 from connecting rod bearing 12420024. Original parts are marked with MWM laser logo.