Technical Information   Troubleshooting Airsep   Fuelsep   Algaesep   OEM Engineering Project Requests   Have a question that's not answered here? Let us know!   We'll be glad to help! Sign up now for the Walker newsletter and get the latest on great deals! Walker Engineering 9255 San Fernando Rd. Sun Valley, CA 91352 tel: 818-252-7788 fax: 818-252-7785

System and Operational Problems with Their Solutions Think you may have a problem? Browse our troubleshooting guide to verify that the system is installed properly or if the situation you are observing has an easy fix. AIRSEP GENERAL View troubleshooting for: Fuelseps | Algaeseps Problem Probable Cause Suggested Solution AIRSEP® drain interferes with engine at bottom of unit. Hose barb may be too long. Install a 45° hose barb to clear obstruction (use 2 wrenches when removing). DO NOT ROTATE AIRSEP® body so barb clears obstruction. Springs have fallen off. Stainless steel springs may have been removed by a mechanic using snips that may have damaged spring. Wrong size spring installed. Replace spring when applicable. Engine crankcase pressure isvery positive. (> + 6" H20) Improper AIRSEP® installation. Vacuum regulator installed backwards. Improper AIRSEP® size, or wrong air filter installed. Take manometer reading with and then without AIRSEP® blow by hose connected, at engine full load. Contact Walker Engineering for further procedures. Review arrow on regulator and reinstall. Check with Walker Engineering on unit sizing. Engine crankcase pressure isvery negative. (> - 6" H20) Improper AIRSEP® installation. Review arrow on regulator and reinstall. Check with Walker Engineering on unit sizing. Take manometer reading with and then without AIRSEP® blow by hose connected, at engine full load. Contact Walker Engineering for further procedures. Remove regulator and inspect piston & spring for proper movement. Check with Walker Engineering on unit sizing. Large amount of oil found in air inlet area. Improper AIRSEP® installation. AIRSEP® is not draining oil properly. Drain on AIRSEP® is not positioned straight down. Take manometer reading with and then without AIRSEP® blow by hose connected, at engine full load. Contact Walker Engineering for further procedures. Inspect walker check valve to make sure it is vertical. Inspect to be sure Walker check valve is installed at location just above oil level in oil pan. Inspect to be sure oil drain hose is sloping down evenly to check valve, with no trap areas. Inspect to be sure 1/2" drain hose is used instead of 3/8". Rotate AIRSEP to make suredrain is at 6 o'clock position. AIRSEP® vacuum is measured to be very slight. Wrong size AIRSEP® installed. Wrong size air filter installed. Engine oil fill cap loose, dipstick loose, not airtight. Contact Walker Engineering to verify proper AIRSEP® and filter sizing. Replace oil fill cap or dipstick as required. Units should beair tight. Restriction indicator tube broken off. Impact damage. Cover opening with duct tape until unit can be replaced. Contact Walker Engineering to inquire about purchasing a replacement or refurbished unit. AIRSEP® vacuum is measured to be very slight Wrong size AIRSEP® installed. Wrong size air filter installed. Engine oil fill cap loose, dipstick loose, not airtight. Contact Walker Engineering to verify proper AIRSEP® and filter sizing. Replace oil fill cap or dipstick as required. Units should be air tight. Restriction indicator tube broken off Impact damage. Cover opening with duct tape until unit can be replaced. Contact Walker Engineering to inquire about purchasing a replacement or refurbished unit. FILTERS   Problem Probable Cause Suggested Solution Restriction indicator shows red. Filter needs to be serviced due to excess dirt captured on filter element. Purchase Walker cleaning kit (DDF9000) and clean filters as specified, up to three (3) times. Replace filter elements. Filter collapses when running. Filter is extremely dirty or is not rated for engine HP. Replace filter. Contact Walker Engineering to confirm element size, versus engine CFM requirement. Filter is no longer red or pink in color. Age, storage, or direct sunlight for extended period of time. Elements were not properly oiled when last serviced. Non-Walker approved oil used at last service interval. Purchase Walker cleaning kit to service element if exceeding 250-300 hrs service. Re-oil. Re-oil filters at next scheduled cleaning. Filter element pleats are crushed. Impact damage. Filter is still usable. Carefully attempt to straighten pleats by hand. Replace filter elements if extremely bad condition. Filter was cleaned but still shows red on restriction indicator. Filter was subject to exhaust leak, and is still clogged with soot. Soot cannot be removed. Wrong size filter installed on AIRSEP® Replace filter element and confirm sizing. Small vacuum limiter element is not removable to clean. Vacuum limiter was replaced with vacuum regulator several years ago. NEW regulator element is removable. Replace limiters with new vacuum regulators. Contact Walker Engineering for pricing. OIL LEAKS   Problem Probable Cause Suggested Solution Oil leaking from seam where Airfilter seats in AIRSEP®. Some AIRSEPS® use high strength epoxy at the forward seam. At times mechanics have over tightened the band clamp securing the AIRSEP®, and fractured the seam. AIRSEP is not draining properly. Report failure, replace AIRSEP® body with new unit. Check to be sure oil drain hose follows smooth downward slope, and Walker checkvalve is installed vertically. Oil leaking fromdrain fitting at bottom of can. Hose barb may not be installed properly with seal compound. Drain fitting may be cracked due to over-torqueing or NOT using a second wrench to capture the drain nut on the AIRSEP® when tightening or removing barb. Replace unit or contact Walker Engineering to review damage for possible consideration towardnew or refurbished unit. Oil leaking from oil drain lines. Hoses might be extremely old or not Walker specified AEROQUIPT hose. Contact Walker Engineering to purchase approved hose. Trim hoses to eliminate damaged ends. Tighten or replace hose clamp. Oil leaking from flex hose. Hoses might be extremely old or not Walker specified WALKER FLEX hose. Fitting hose is attached may be bent or distorted. Contact Walker Engineering to purchase approved hose. Examine area hose is connected. Tighten or replace hose clamp. Oil leaking from Vacuum regulator element. The regulator should be installed so that filter element is straight up or not less than15° above horizontal. The unit vents oil vapor in bypass mode if MAIN filters are clogged. Reposition regulator so any condensed oil will stay in body of regulator. Clean or replace main filterelements, to eliminate bypass mode activation. back to top View troubleshooting for: Fuelseps | Algaeseps

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