1. Pump cylinder washer (#17) is sticking.
....Clean or replace pump cylinder washer.
2. Check valve (#36) hole is clogged.
....Clean check valve (#36).
3. Filter in pressure cylinder is clogged.
....Clean permanent filter within pressure cylinder (#5).
1. Little to no air in the Pressure Cylinder (#5).
....Drain Pressure Cylinder by disconnecting Shut-Off Hose.
1. Swollen or damaged Piston Seal(#21).
....Clean and lubricate Piston Seal and Pump Cylinder(#14) with petroleum jelly or replace.
2. Dirty drive rod Bushing (#22).
....Lubricate Bushing with petroleum jelly.
1. Shut-Off Nozzle is clogged.
....Clean Shut-Off or Nozzle as described in Maintenance Section.
1. Piston Seal may be worn or damaged.
....Inspect and lubricate Piston Seal(#21). If damaged, replace.
2. Damaged or worn O-Ring(s).
....Lubricate or replace O-Ring(s).
1. Piston Seal (#21) on pump piston is worn or damaged.
....Replace Piston Seal (#21).
2. Pump Cylinder Washer (#17) may be dirty or damaged.
....Flush pump with clean water to remove any debris from the Pump Cylinder Washer or replace.
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