Also rebuilds air compressor regulator part numbers: VT036100AV, WL029700AV, WL017601AV and WL017600AV. Is the regulator on your air compressor leaking? Have you tried to find a rebuild kit for it (which consists of a couple of O-rings and a plastic part or two), only to find that you have to buy an entire manifold? Well, I did too. I'll be honest...it pissed me off just a little bit. So I took that negative energy and found a solution. What I have here for my fellow Americans is a rebuild kit that I researched and put together to save some money while repairing the issue. I pass these savings on to you. Rest assured that if it's good enough for me it's going to make you happy. Instructions: 1. Unscrew cap 2. Remove spring 3. Remove plunger 4. Use a flat head screwdriver to unscrew and remove the air regulator valve. Unscrew carefully, there is a black rubber seal and a spring on the back side, so take care as you don't want to lose them. 5. Reassemble in same order on your compressor manifold. 6. The effort to turn your rebuilt regulator may be increased. This is normal. Also works for the following model numbers: EX800701AJ 4B222E (2007) 4B222E (2008) TF214800 (2005) TF214700 (2005) DP45517C (2005) DP4460TA (2005) WL506208 (2003) EX800003 (2003) EX800003 (2007) EX800301AJ (2005) EX801800 (2007) EX820000 (2004) EX8302 (2004) EX840300 (2005) XP581000 (2005) XP581501 (2005) FP201255AJ (2002) HS781003 (2005) TF291202 (2005) TF291203 (2007) HS781003 (2006) HS781004 (2006) HS781002 (2003) HS781003 (2004) HS781004 (2007) TF291201 (2003) VT635600 (2006) VT635700 (2006) HS781003AJ TF061903