Titan Commander 155-559 Fluid Pump Assembly Parts

Verified SPEEFLO Commander Parts Diagram

Commander 155-559 Fluid Pump Assembly Parts

Titan’s 155-559 diagram covers the pump block, paired packing sets, upper and lower springs, displacement rod, piston-seat assembly, cylinder, ball cage, inlet ball and foot valve. The documented motor-pump ratio is 45:1 with the 742-series motor.

Built for contractors, repair shops, maintenance technicians and buyers who need verified Commander component identification and diagnosis-first repair guidance.

Verified Diagram Scope

Part numbers and names are restricted to the current category and Titan Commander documentation.

Diagnosis Before Replacement

Every recommendation begins with inspection of genuine assembly components.

Six-Card Maximum

The commercial section contains no more than six verified component cards.

Verified Commander Links

Navigation uses confirmed machine-family and assembly-category destinations only.

Assembly Overview

Verified component index: 155-907, 138-053, 155-982, 155-921, 155-932, 155-991

Functions Supported by the Assembly

Primary Assembly Function

Pump block performs a central function within this documented Commander system.

Pressure or Flow Support

Poly/leather packing set supports controlled pneumatic, fluid or structural operation.

Sealing and Retention

Displacement rod contributes to sealing, alignment, filtration, retention or stability.

Service Identification

The exploded page separates genuine service components from adjacent Commander systems.

Service Applications

Use this page for model identification, preventive inspection, targeted repair, assembly rebuilding, pressure or flow diagnosis and purchasing for Commander equipment that specifically uses this assembly.

Troubleshooting

Operating symptom	Inspect first	Diagnosis before replacement
Loss of pressure or output	packing sets 138-053	Relieve pressure and inspect packing sets 138-053 for wear, leakage, blockage, contamination, looseness or incorrect installation. Confirm the actual fault and inspect connected systems before replacement.
Irregular cycling or pulsation	displacement rod 155-982	Relieve pressure and inspect displacement rod 155-982 for wear, leakage, blockage, contamination, looseness or incorrect installation. Confirm the actual fault and inspect connected systems before replacement.
Visible fluid or air leakage	piston seat 155-921	Relieve pressure and inspect piston seat 155-921 for wear, leakage, blockage, contamination, looseness or incorrect installation. Confirm the actual fault and inspect connected systems before replacement.
Restricted flow or movement	cylinder 155-932	Relieve pressure and inspect cylinder 155-932 for wear, leakage, blockage, contamination, looseness or incorrect installation. Confirm the actual fault and inspect connected systems before replacement.
Startup or priming failure	inlet ball 178-700	Relieve pressure and inspect inlet ball 178-700 for wear, leakage, blockage, contamination, looseness or incorrect installation. Confirm the actual fault and inspect connected systems before replacement.
Recurring fault after service	foot valve 155-991	Relieve pressure and inspect foot valve 155-991 for wear, leakage, blockage, contamination, looseness or incorrect installation. Confirm the actual fault and inspect connected systems before replacement.