Hitachi 312350E Typical Installation of a Suction Feed System, Key

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Installation

Installation

Typical Installation of a

 

 

 

K

F

G H

J

Suction Feed System

 

 

 

 

 

E

D

C

B

A

Key:

AFollower plate

BWeep tube

CFluid outlet line (to gun)

DDrain valve (required)

EGround wire

FHydraulic return line, minimum 3/4 inch I.D. (required)

GHydraulic outlet, 3/4” npt (f)

HReturn line shut-off valve, minimum 3/4 inch (required)

JHydraulic inlet, 3/4” npt (m)

KTee, 3/4” npt

LSupply line shut-off valve (required)

L M N

P

Q

U

T

R S

ti0477a

M*Pressure gauge

N*Pressure reducing valve (required in systems over 600

psi [4.1 MPa, 41 bar])

PAccumulator

Q*Flow control valve (required in systems over 3 gpm [11 lpm])

RHydraulic supply line

SCheck valve

TVariable volume pressure compensated pump

UHydraulic power supply

VDrain line, accumulator

*Included in Hydraulic Fluid Control Kit 247538 or 247705, which can be ordered separately.

FIG. 1

Although the installation shown in FIG. 1 is only a guide for selecting and installing system components and accessories, some of the equipment is required, as noted in the key. For assistance in designing a system to suit your needs, contact your Graco distributor.

Mount pump to suit the type of installation planned.

CAUTION

Do not operate pump without it being securely mounted to a drum cover or support.

Maximum Working Pressure of Accessories To reduce the risk of serious injury including fluid injection and splashing in the eyes or on the skin which may be caused if component ruptures, all accessories added to the reciprocator power supply side must have at least 600 psi (4.1 MPa, 41 bar) maximum working pressure.

All accessories added to the pump fluid outlet side must have at least 7500 psi (51 MPa, 517 bar) maximum working pressure.

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312350E

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Contents Table of Contents Dyna-StarFire and Explosion Hazard Moving Parts Hazard Typical Installation of a Suction Feed System InstallationKey Pump Accessories Hydraulic Lines Hydraulic Power SupplyPump Outlet Drain Valve Limit Fluid Flow to ReciprocatorGrounding Grounding the PumpPressure Relief Procedure Before Starting Pump OperationStarting Pump If the Pump Leaks at the Fluid FittingsShutdown Maximum Working PressuresProblem Cause Solution TroubleshootingRelieve pressure, page 7. Check Replacing Throat Seals ServiceRelieve pressure, Disconnecting Reciprocator and Displacement Pump Reciprocator Repair Drain Oil Out of ReciprocatorAllow 24 hours to cure before operating reciprocator Assembly a When reinstalling cylinder 25, , be sure Displacement Pump Repair DisassemblyAssembled / Cutaway View Reciprocator Parts 60aReciprocator Parts Displacement Pump PartsPart No. Description Qty Pump Parts Model120# Drum Length Part No. Description Qty 400# Drum Length Part No. Description QtyTechnical Data Typical Fluid Outlet PressureDimensions and Mounting Hole Layout 312350E Graco Standard Warranty Graco Information

312350E specifications

The Hitachi 312350E is a cutting-edge excavator designed for heavy-duty applications in the construction and mining industries. This powerful machine stands out due to its robust design and advanced technological features that enhance productivity, efficiency, and operator comfort.

One of the key characteristics of the Hitachi 312350E is its powerful engine, which delivers exceptional performance while adhering to strict emissions regulations. The high-output engine ensures that the excavator can handle demanding tasks with ease, whether it's digging, lifting, or moving heavy materials. Coupled with a precise hydraulic system, the machine provides smooth and responsive control, allowing operators to perform operations more effectively.

In terms of design, the Hitachi 312350E features a spacious and ergonomic cab that prioritizes operator comfort. The well-designed layout includes adjustable seating, intuitive controls, and excellent visibility, which significantly reduces fatigue during long working hours. The advanced air conditioning system and noise-reducing materials contribute further to a pleasant working environment.

The 312350E is equipped with several advanced technologies that enhance its operational capabilities. Among these features is the Intelligent Machine Control system, which allows for automated digging and grading. This technology increases precision, reduces material waste, and ensures optimal results in various tasks. Furthermore, the machine’s onboard diagnostic system provides real-time insights, helping operators manage maintenance and reduce downtime.

Safety is also a top priority with the Hitachi 312350E. The excavator comes with several protective features such as reinforced structures, a ROPS/FOPS-certified cab, and advanced lighting systems for visibility in low-light conditions. These attributes make it suitable for various job sites, whether urban, rural, or construction-focused.

Finally, the Hitachi 312350E boasts impressive fuel efficiency, which not only reduces operational costs but also minimizes environmental impact. Its design emphasizes sustainability without compromising on performance, making it an ideal choice for contractors looking to balance productivity with environmental responsibility.

Overall, the Hitachi 312350E is a powerful, efficient, and user-friendly excavator that meets the rigors of modern construction and excavation applications. With its blend of advanced technology, comfort, and safety features, it stands as a testament to Hitachi's commitment to quality and innovation in heavy machinery.
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