Hitachi 312350E important safety instructions Reciprocator Repair, Drain Oil Out of Reciprocator

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Reciprocator Repair

Reciprocator Repair

See FIG. 7 and FIG. 9 and Reciprocator Parts, page 18.

• Clean and inspect all parts for wear or damage. Replace worn parts as needed. For best results, always replace all the o-rings and seals when you disassemble the pump. Repair Kit 247455 is available. Parts included in the kit are marked with an asterisk, for example (23*), in the text and drawings. Always replace seals (23* and 24*) and seals (16* and 44*) together.

•Assembly tool 189305 is required for reassem- bling the reciprocator.

•Loctite® 242 thread sealant and Loctite® Primer T or Perma-Loc®115 thread sealant and Perma-Bond®Surface Conditioner I are required. Be sure their shelf life is within the manufacturer’s recommendations.

•Use Loctite® 609 on yoke (9) and rod (12) on page 13, step 9 only. Use Loctite® 242 or Perma-Loc®115 on other threaded surfaces as required.

Drain Oil Out of Reciprocator

Before you begin, drain oil out of reciprocator.

1.Relieve pressure, page 7.

2.Place reciprocator in a drain pan.

3, 39, 2 36, 37

32

43

46 (hidden from view)

ti10602a

FIG. 7

See FIG. 7 for steps 1-3, except where noted.

1.Place adapter (43) in a vise. Remove four cap- screws (46). Pull bottom cap (32) off adapter (43). If needed, replace seals as described on page 10.

2.Loosen both nuts on fluid tube (45). Use a wrench to rotate tube fittings (1, 60) to the side and then remove tube (45). Check o-rings (1a, 60a) on fittings and replace them if they are worn or damaged. Install plugs in fittings to prevent contamination. See FIG. 4 and Reciprocator Parts drawing, page 18.

3.Remove capscrew (3), nuts (36) and lockwashers (37) on top of reciprocator.

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312350E

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Contents Table of Contents Dyna-StarFire and Explosion Hazard Moving Parts Hazard Installation Typical Installation of a Suction Feed SystemKey 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 PressuresTroubleshooting Problem Cause SolutionRelieve pressure, page 7. Check Service Replacing Throat SealsRelieve 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 60aDisplacement Pump Parts Reciprocator 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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