Swivel Connector Spindle

The swivel connector spindle is the internal, rotating part of the drum hydraulic joint. It rotates together with the drum inside the stationary connector body, routing water flow through the internal channel and cooperating with sliding seals throughout the full drum rotation range. Number 40311 identifies the spindle variant correct for a specific Kranzle hose reel drum series.

Application

The spindle is installed inside the swivel connector body on the lateral side of the hose reel drum. It forms the rotating part of the hydraulic circuit – it rotates with the drum while the connector body remains stationary. Sliding seals operating on the external surface of the spindle maintain the integrity of the joint. The internal channel of the spindle carries water under pump working pressure with every drum rotation during hose winding and unwinding.

Symptoms – When to Replace

• Leakage from the drum joint that does not resolve after replacing the seals alone – a scratched or worn spindle sliding surface does not cooperate correctly with a new seal.
• Spindle play in the connector body – worn fit between spindle and body.
• Mechanical damage to the spindle – damaged connection thread.
• Blocked drum rotation caused by spindle seizure in the connector body.

How to Select the Correct Part

The basis for selection is reference number 40311. The spindle must be compatible with the swivel connector body used in the same drum – the external dimensions of the spindle, the internal channel geometry, and the connections must match the specific drum model. Number 40311 is a separate variant from spindle 40168 – before ordering, confirm which reference number corresponds to your drum model. When replacing the spindle, also assess the condition of the connector body – a damaged sliding seat in the body rules out a lasting repair through spindle replacement alone.

Compatibility

Kranzle catalogue part. Used among others in hose reel drums of Kranzle pressure washers equipped with a swivel connector requiring spindle 40311.

[faq] Is it necessary to replace the entire swivel connector body when replacing spindle 40311?|No, provided the connector body is in good condition – the sliding seat smooth, free of scratches and pitting, and the fit with the new spindle without play. If the body is worn or damaged, replacing the spindle alone will not restore a lasting seal. When disassembling, assess the condition of both components – the decision on the scope of replacement should be based on the condition of the cooperating surfaces, not on a principle of replacing the entire connector.

What does leakage that only appears at a specific hose winding speed, and not throughout operation, indicate?|Leakage dependent on drum rotation speed points to insufficient seal contact pressure at high sliding speed – the seals are worn and lose their seal under increased rotation. If the leak appears only during fast winding and disappears during slow rotation or standstill, the seals require replacement. If seal replacement does not resolve the problem, the cause is a worn sliding surface on the spindle. [/faq]