245-7339 2457339 117.6 mm outer diameter crankshaft seal of 446D 446B

Q: What is the OEM part number of this crankshaft oil seal?
A: The OEM part number is 245-7339, this crankshaft oil seal is designed for excavator engine front crankshaft sealing during engine overhaul.

Q: What construction machine can part 245-7339 be installed and matched on?
A: 245-7339 fits excavator engine, mounted on the front end of crankshaft to seal engine lubricating oil and block external contaminants.

Q: What raw materials are used to manufacture this crankshaft oil seal?
A: It consists of PTFE, NBR, metal shell and stainless steel garter spring, with low friction and good high temperature resistance.

Q: What core function does this crankshaft oil seal perform for excavator engine?
A: It forms a rotary sealing barrier, keeps engine oil inside crankcase and prevents dust, water and grit entering the engine assembly.

Q: Where is this crankshaft oil seal positioned in the engine assembly?
A: It is pressed into the front housing of engine block, installed between rotating crankshaft and stationary engine housing.

Q: What issue will occur if this crankshaft oil seal becomes worn or aged?
A: Engine oil will leak from crankshaft front end, and foreign particles will enter engine to accelerate bearing and crankshaft wear.

Q: What product category does 245-7339 belong to?
A: It belongs to crankshaft oil seals, rotary shaft sealing spare part for excavator engine maintenance and repair.

Q: What advantage does the PTFE sealing lip bring?
A: PTFE lip reduces friction loss during crankshaft high-speed rotation and extends service life under continuous engine operation.

Q: What kind of working condition can this oil seal withstand?
A: It can work stably under high engine temperature and frequent vibration on heavy-duty construction excavation sites.