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Air leaking in SKS Rennkompressor pump
My recently-purchased pump seems to leak air when I'm at about 2 bar / 30 lb
When I start to inflate a tire, the first couple strokes (up to about 30#b) work normally. For the next several strokes (around 30#), it seems that air is leaking past the plunger (don't know the correct terminology for the barrel washer or whatever that actually compresses the air). I can hear a lot of hissing air, and the strokes seem pretty ineffective, not much movement in the pressure gauge. Once I get a bit above 30# (up to 100#, which is as high as I go on my bike), the pump seems to work normally - no more leaking air. I presume this is not normal behavior. Can you guide in what corrective steps to take? Replace the barrel washer (eyeballing mine, I don't see defects, but I don't know I'd recognize one anyway)? Lubricate the barrel (and what's the recommended lubricant)? Something else? Thanks in advance for any guidance. -- Rob Lindauer - for my real email, change "att" to "sbc" |
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Air leaking in SKS Rennkompressor pump
On 29 May, 19:48, Rob Lindauer wrote:
My recently-purchased pump seems to leak air when I'm at about 2 bar / 30 lb When I start to inflate a tire, the first couple strokes (up to about 30#b) work normally. For the next several strokes (around 30#), it seems that air is leaking past the plunger (don't know the correct terminology for the barrel washer or whatever that actually compresses the air). *I can hear a lot of hissing air, and the strokes seem pretty ineffective, not much movement in the pressure gauge. Once I get a bit above 30# (up to 100#, which is as high as I go on my bike), the pump seems to work normally - no more leaking air. I presume this is not normal behavior. *Can you guide in what corrective steps to take? *Replace the barrel washer (eyeballing mine, I don't see defects, but I don't know I'd recognize one anyway)? *Lubricate the barrel (and what's the recommended lubricant)? *Something else? Clean and lubricate the barrel with silicone lubricant. |
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