TM 10-8110-201-14&PTable 4-2. Troubleshooting (Cont)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION5. Pressure Control Shuts Off Prematurely or Too LateCheck pilot valve adjustment.Adjust pilot valve (para 4-22).6. Cycling Valve: No Response to Fill or Stop Buttons.Step 1. Inspect for damaged cycling valve preformed packings.Install serviceable cycling valve preformed packings (para 4-21).Step 2. Inspect for damaged cycling valve compression ring.Install serviceable cycling valve compression ring (para 4-21).Step 3. Inspect for dirty cycling valve.Clean dirty cycling valve (para 4-21 b).7. Hose Assembly Coupling Halves Leak.Step 1. Inspect for damaged or missing coupling half gaskets.Install serviceable coupling half gaskets (para 4-24 and 4-25).Step 2. Inspect for cracked coupling half.Install a serviceable coupling half (para 4-24 and 4-25).8. Hose Leaks.Inspect for cut or cracked hose.Replace or repair hose assembly.Section VI. MAINTENANCE OF DRUM ASSEMBLY4-14. Coupler Valve Assembly.a. Removal. Stop the pump assembly and pro-ceed as follows:(1) Turn handwheel (fig. 4-2) clockwise to closethe valve.(2) Disconnect hose assembly from couplervalve assembly.(3) Disconnect coupler valve assembly fromcheck valve assembly adapter.NOTEInstall the dust cap on the check valveassembly adapter.b. Disassembly.(1) Unscrew and remove nut (1, fig. 4-6) andhandwheel (2) from stem (4).(2) Unscrew and remove handwheel retainer (3)from the coupler valve body (14).(3) Remove valve stem (4) from the couplervalve assembly. Pry damaged preformed packing(5) from valve stem.(4) Remove retaining ring (6), spacer (7), andvalve stem rotor (8).(5) Remove valve stem (9) and seat ring (10). Ifdamaged, remove pin (12) from valve stem.c. Repair.(1) Using a pointed instrument, remove adamaged gasket (11 and 13, fig. 4-6) from thecoupler valve assembly. Using a blunt instrument,install serviceable gaskets in the coupler valveassembly.4-12
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
