Hitachi 312350E important safety instructions Allow 24 hours to cure before operating reciprocator

Page 13

 

 

 

3, 39, 2

 

 

 

36, 37

 

 

 

 

 

 

 

30

 

 

13*

 

 

31

 

 

 

 

29

 

 

 

 

 

 

 

 

38

 

 

 

 

 

 

 

 

26

 

 

 

 

 

6, 7

51 2

 

 

 

 

 

 

9

 

 

 

45

 

12

 

 

 

 

25

 

 

 

 

 

 

 

 

122

24*

23*, 49*

34

 

20

 

32

 

13*

 

17

21

 

 

20

 

 

18

ti10605a

1Torque to 40 to 48 ft-lbs (54 to 65 N.m)

2 Torque to 54 to 56 in-lbs (6.1 to 6.3 N.m)

FIG. 8

See FIG. 8 and Reciprocator Parts page 18 for steps 4-20, except where noted.

4.Tap bottom of displacement rod (34) with a plastic mallet to loosen cylinder (25).

5.Grasp valve spool (31) and pull it off cylinder and tie rods (38). Pull cylinder and piston off bottom cap (32). It is not necessary to remove tie rods from bot- tom cap.

Reciprocator Repair

6.Lay assembly on its side. Place a clean rag around yoke (9) to prevent losing detent balls. Slide yoke (9) sideways off valve sleeve (29) while holding the balls (7) and spring (6) in place.

7.Slide cylinder (25) off displacement rod (34). Hold hex end of displacement rod in a vise and use a spanner wrench in pin holes of the piston (22) to screw it off the rod.

12

20

21

20

18

ti10605a

FIG. 9

8.(FIG. 9) Visually inspect the spring (21). If there is wear or damage, remove nut (18), spring (21) and retainers (20) from trip rod (12). Reassemble with a retainer (20) on each end of the new spring (21). You must thread nut onto rod until it runs out of thread, so that it bottoms out on rod’s shoulder.

• If you are re-using or reassembling any parts, use a surface cleaner such as chlorinated sol- vent on the threads and blow with compressed air. A 1/4-28 UNF-2A tap can be used to remove adhesive from internal threads of yoke

(9).

•Thread sealant and primer are required. See Reciprocator Repair Notes, page 12 for specifi- cations. Loctite® 609 is used only in Step 9.

9.Apply fresh Loctite® 609 thread sealant to first two or three internal threads of yoke (9). Apply primer to external threads of rod (12). Let primer dry for 3-4 minutes. Assemble, torquing screw to 54-56 in-lbs (6.1 to 6.3 N.m). Remove excess sealant.

Allow 24 hours to cure before operating reciprocator.

312350E

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Contents Dyna-Star Table of ContentsFire and Explosion Hazard Moving Parts Hazard Typical Installation of a Suction Feed System InstallationKey Hydraulic Power Supply Pump Accessories Hydraulic LinesPump Outlet Drain Valve Limit Fluid Flow to ReciprocatorGrounding the Pump GroundingOperation Pressure Relief Procedure Before Starting PumpIf the Pump Leaks at the Fluid Fittings Starting PumpShutdown Maximum Working PressuresProblem Cause Solution TroubleshootingRelieve pressure, page 7. Check Replacing Throat Seals ServiceRelieve pressure, Disconnecting Reciprocator and Displacement Pump Drain Oil Out of Reciprocator Reciprocator RepairAllow 24 hours to cure before operating reciprocator Assembly a When reinstalling cylinder 25, , be sure Disassembly Displacement Pump RepairAssembled / Cutaway View 60a Reciprocator PartsReciprocator Parts Displacement Pump PartsPart No. Description Qty Model Pump Parts120# Drum Length Part No. Description Qty 400# Drum Length Part No. Description QtyTypical Fluid Outlet Pressure Technical DataDimensions and Mounting Hole Layout 312350E Graco Information Graco Standard Warranty

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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