21727-2 Western Fisher 48278 SnowEx Blizzard Plow Pump Breather Thread On Vented Fill Cap

A New Plow Pump Breather Cap.

Western and Fisher use part # 21727-2 for this breather cap and Blizzard and SnowEx use part # 48278.

This is the thread on type. On side to side pumps, this fits right onto the reservoir, but on pumps that are positioned up and down, this cap will thread into elbow # 21726. They also sell them in a set as part # 22344K.

For a diagram showing its placement on a horizontal pump, you can check this link.

For an example of its use with an elbow on a vertical pump, check this link.