Hydraulic Repair Iowa - Social Proof
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Essential Guide to Replacing Hydraulic Pumps: Key Considerations”

Undertaking the replacement of a Hydraulic Repair Near Me hydraulic pump is not without its challenges. Incorrect modifications can lead to significant damage to the entire hydraulics system. It’s important to recognize that not every issue with your pump necessitates a complete replacement.

When your hydraulic pump starts to underperform, prompt troubleshooting is essential. Delaying until the pump completely fails can lead to expensive downtime for your facility.

This blog post will explore the reasons behind hydraulic pump failures, indicators to watch for during inspection, the process of replacing a pump, and additional insights.

Causes of Hydraulic Pump Failure

Hydraulic Repair Near Me Hydraulic pump failures commonly stem from issues like fluid contamination, overpressure, substandard fluid quality, cavitation, extreme temperatures, and persistent leaks.

Fluid Contamination

The leading cause of pump failure is contaminated fluid, often introduced through a cylinder rod or breather valve, or due to poor repair practices. Contaminants can alter fluid properties, cause buildup, and lead to corrosion, diminishing system efficiency.

Excess Pressure

Hydraulic Repair Near Me Pumps are designed for a specific pressure range, and exceeding this can lead to damage or complete failure. Extreme pressure may even result in explosions.

Poor Fluid Quality

High-quality cooling and lubrication oils are crucial, particularly in terms of mineral content and viscosity. The wrong viscosity can cause cavitation or dangerously high heat and friction.


Vapor cavities can implode, eroding metal and contaminating fluid. Preventing this involves maintaining intake lines, ensuring tight fittings and clamps, keeping correct fluid levels, and checking for leaks in Hydraulic Repair Near Me pump shaft seals.

Excessive Temperature

Temperatures above 180 degrees Fahrenheit can harm seals and degrade fluid. Overheating can result from low fluid levels, blocked heat exchangers, internal leaks, or cavitation.

Uncorrected Leaks

Leaks, often from faulty seals or internal damage, can introduce contaminants, affecting pump performance.

Signs of Hydraulic Repair Near Me Pump Replacement Need

Be aware of increased noise, temperatures exceeding 180 degrees Fahrenheit, or a sluggish system, as these can indicate problems requiring attention.

Replacing a Pump

To replace a pump:

  • Identify the primary issue.
  • Remove the faulty pump.
  • Retract all rods.
  • Drain and flush the tank with diesel while powered on.
  • Install new filters and the replacement pump.
  • Fill with appropriate oil.
  • Flush valves and lines with new oil.
  • Connect lines to cylinders and motors, flushing out contaminated oil.
  • Change the filter again.
  • For those inexperienced, consider hiring a professional.

Pump Replacement Frequency

The lifespan of a Hydraulic Repair Near Me pump varies depending on usage and the specific model. Regular preventative maintenance is crucial for longevity.

Maintenance Tips

Daily checks should include oil level, temperature, contamination, and leaks. Annually, inspect the entire system, change oil, and check all components, following any specific manufacturer recommendations.

Cost of Replacement

Costs vary based on pump type, manufacturer, and whether a professional does the work. On average, a professional replacement might cost around $1,500. In emergencies or with discontinued models, remanufactured pumps can be a viable, more affordable option, often with shorter wait times. Ensure remanufactured pumps meet OEM standards.

Required Tools for Hydraulic Pump Replacement

  • Safety goggles
  • Drilling tools with various bits
  • Set of wrenches
  • Wire cutting and stripping tool
  • Screwdriver types: Phillips and flathead
  • Cable securing ties
  • Spray for preventing marine corrosion
  • Mounting hardware: The pump kit provides screws, but ensure they’re suitable for your mounting surface. If not, supply appropriate screws.
  • Hydraulic system components (Refer to Hydraulic Considerations, page 3):
    • Hydraulic hose, minimum -4 [6 mm (1/4 in.) ID], equipped with either machine-crimped or field-replaceable fittings with at least 1000 psi rating.
    • Hydraulic T-connectors
    • Hydraulic shut-off valves
    • Thread sealing product, e.g., LOCTITE® 567
    • Equipment for bleeding hydraulic systems
    • Hydraulic fluid

Mounting the Pump: Key Points to Consider


Install the pump in a dry area, shielded from water and weather exposure.

  • Prior to installation, determine your boat’s hydraulic steering type and consult the hydraulic diagrams. Each boat’s layout varies and influences the pump’s mounting location (see Hydraulic Considerations, page 3).
  • Ensure the selected pump suits your vessel’s requirements. Consult the autopilot compatibility guide at garmin.com.
  • Position the pump within 19 inches (0.5 m) of the ECU.
  • The connecting cables between the pump and ECU cannot be lengthened.
  • Ideally, locate the pump close to the cylinder to limit hydraulic hose length to 3 m (10 ft.).
  • Preferably mount the pump horizontally.
  • If horizontal mounting isn’t feasible, mount it vertically with the connectors on the pump head facing upwards.
  • Ensure hydraulic steering lines can reach the chosen mounting location.

Installing the Pump

Before mounting:

  • Select an installation spot (refer to Mounting Considerations, page 2) and determine appropriate mounting hardware (see Tools Needed, page 2).
  • Position the pump at the chosen spot, use it as a template to mark the mounting holes.
  • Drill holes using a suitable drill bit for both the surface and the chosen hardware.
  • Secure the pump in place using the selected mounting hardware.

Hydraulic System Setup and Considerations


This pump is incompatible with steering systems that have an unvented reservoir, as it can cause damage. Confirm the steering system has a vented reservoir, usually indicated by a vent hole in the highest helm’s filler cap. If uncertain, consult the helm or reservoir manufacturer.

Do not use the autopilot for steering until all air is bled from the hydraulic system.

For hydraulic line additions, only use hoses that are -4 [6 mm (1/4 in.) ID] or larger with a minimum 1000 lbf/in² (6,895 kPa) rating.

Avoid using thread seal tape like Teflon® tape or thread putty on any hydraulic fitting. These can introduce debris into the system, potentially blocking valves and rendering the autopilot or steering system unusable. Their use also voids your warranty.

Apply liquid thread sealant carefully to prevent hydraulic or autopilot system damage.

NOTE: This pump cannot be used with unbalanced cylinder systems.

Before connecting the pump to the hydraulic lines, review the hydraulic-layout diagrams to plan the best installation approach for your boat’s hydraulic system (see Hydraulic Layouts, page 3).