2-66. SKID-MOUNTED PRETREATMENT ASSEMBLY REPAIR (CONT)
Install ball in valve body.
Install seal and end connector.
Install union nut.
Install check valve in pipe.
Install front elbow.
Install nipple and reducer.
Install elbow on back of skid.
e. Diaphragm Valve Replacement/Repair
Remove two elbows and nipple at top of pretreatment assembly.
Remove nipple. Remove valve.
Loosen two setscrews on rear of handwheel.
Remove cap seal, handwheel, and plastic washer from bonnet.
Remove four nuts and bolts. Remove bonnet from valve body.
Remove lube fitting, spindle, shim washer, and thrust bearing.