Troubleshooting

Troubleshooting

 

 

 

 

 

 

 

 

1. Relieve the pressure, page 12.

 

 

 

 

 

 

 

 

2. Check all possible causes and problems before dis-

 

 

 

 

 

 

 

 

assembling the pump.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Problem

 

Cause

Solution

 

 

 

 

 

 

 

 

 

Pump fails to operate.

Restricted line or inadequate air/hydrau-

Clear; increase air/hydraulic supply.

 

 

 

 

 

 

lic supply; closed or clogged valves.

Check that valves are open.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Obstructed fluid hose or gun/valve; fluid

Open, clear*; use hose with larger ID

 

 

 

 

 

 

hose ID is too small.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fluid dried on displacement rod.

Clean; always stop pump at bottom of

 

 

 

 

 

 

 

 

 

stroke; keep wet-cup 1/3 filled with com-

 

 

 

 

 

 

 

 

 

patible solvent.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dirty, worn, or damaged motor parts.

Clean or repair; see separate motor

 

 

 

 

 

 

 

 

 

manual.

 

 

 

 

 

Pump operates, but output low on both

Restricted line or inadequate air/hydrau-

Clear; increase air/hydraulic supply.

 

strokes.

lic supply; closed or clogged valves.

Check that valves are open.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Obstructed fluid hose or gun/valve; fluid

Open, clear*; use hose with larger ID

 

 

 

 

 

 

hose ID is too small.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bleeder valve open.

Close.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fluid too heavy for pump priming.

Use bleeder valve, page 13; use ram.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Worn packings in lower.

Replace packings.

 

 

 

 

 

Pump operates, but output low on down-

Held open or worn intake valve.

Clear valve; service.

 

stroke.

 

 

 

 

 

Fluid too heavy for pump priming.

Use bleeder valve, page 13; use ram.

 

 

 

 

 

 

 

 

 

 

 

Pump operates, but output low on

Held open or worn piston valve or pack-

Clear valve; replace packings.

 

upstroke.

ings.

 

 

 

 

 

 

Erratic or accelerated pump speed.

Exhausted fluid supply.

Refill and prime.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fluid too heavy for pump priming.

Use bleeder valve, page 13; use ram.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Held open or worn piston valve or pack-

Clear valve; replace packings.

 

 

 

 

 

 

ings.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Held open or worn intake valve.

Clear valve; service.

 

 

 

 

 

 

 

 

 

 

*To determine if the fluid hose or gun is obstructed, relieve the pressure, page 12. Disconnect the fluid hose and place a container at the pump fluid outlet to catch any fluid. Turn on the air/hydraulic power just enough to start the pump. If the pump starts, the obstruction is in the fluid hose or gun.

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Hitachi 1800 important safety instructions Troubleshooting, Problem Cause Solution
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1800 specifications

The Hitachi 1800 series excavators represent a significant leap in construction and earthmoving technology, designed to enhance productivity while ensuring operator comfort and environmental sustainability. These excavators are emblematic of Hitachi's commitment to advancing machinery engineering, equipped with an array of features and technologies that optimize performance.

One of the standout characteristics of the Hitachi 1800 is its powerful yet fuel-efficient engine. The machine is equipped with a Tier 4 compliant engine, which meets stringent emission regulations while delivering increased power output. This leads to enhanced digging performance and better fuel economy, reducing operational costs for excavating contractors.

The hydraulic system of the Hitachi 1800 is another remarkable feature. It utilizes a closed-center load sensing system that automatically adjusts hydraulic flow based on the load being handled. This technology allows for precise control during operations, whether digging, lifting, or swinging, and improves overall operational efficiency. The responsiveness of the hydraulic system aids in increasing the speed and accuracy of work cycles.

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The excavator’s durability is another core characteristic. It features a robust undercarriage designed to withstand harsh operating environments, and high-strength materials are used across the machine to enhance longevity and reliability.

In summary, the Hitachi 1800 series excavators combine powerful engines, advanced hydraulic systems, and operator-centric designs to provide a robust and efficient solution for construction and earthmoving projects. With their state-of-the-art technology and commitment to sustainability, they represent an excellent investment for professionals looking to enhance productivity and performance on the job site.
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