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Page Title: ENGINE FOOT THROTTLE WILL NOT OPERATE
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TM 5-4210-220-12 Table 4-2 UNIT TROUBLESHOOTING - Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 2 Check all air lines and connections for leaks.  Check with bubble test Replace/remake connections or replace hose, (see para. 4-9) Step 3 Check quick release valve exhaust for leaks Repair valve as required, (see para. 4-22) Step 4 Check brake treadle valve for leaks Repair as required, (see para. 4-22) 8g ENGINE FOOT THROTTLE WILL NOT OPERATE Step 1 Check all air lines from foot throttle to throttle air chamber Repair/replace as required, (see para. 4-9) Step 2 Check for air leaks from throttle air chamber Replace air chamber, (see para. 4-28) Step 3 Check air chamber rod is connected to engine governor shaft Reconnect or replace air chamber as required Step 4 Foot throttle valve damaged Repair foot throttle valve, (see para. 4-22) 8h BRAKE SHOES SMELL OF BURNING Step 1 Check if brake shoes are dragging a Adjust shoes, (see para. 4-30 or 4-32) b If rear only, parking brake air pressure is low or parking brake diaphragm has leak Replace air chamber or check for leaks in parking brake circuit Step 2 Check if brake drums are full of sand/mud Clean drums when cool to touch Step 3 Clean brake shoe return springs Replace if broken, (see para. 4-30 or 4-32) 4-39

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