Giant LP200, LP250W-MT service manual Pump System Malfunction, Malfunction Cause Remedy

Page 10

PUMP SYSTEM MALFUNCTION

MALFUNCTION

CAUSE

REMEDY

 

The Pressure and/or

Worn packing seals

Replace packing seals

 

the Delivery Drops

Broken valve spring

Replace spring

 

 

 

Belt slippage

Tighten or Replace belt

 

 

 

Worn or Damaged nozzle

Replace nozzle

 

 

 

Fouled discharge valve

Clean valve assembly

 

 

 

Fouled inlet strainer

Clean strainer

 

 

 

Worn or Damaged hose

Repair/Replace hose

 

 

 

Worn or Plugged relief valve on pump

Clean, Reset, and Replace worn parts

 

 

Cavitation

Check suction lines on inlet of

pump for

 

 

Unloader

restrictions

 

 

 

Check for proper operation

 

 

 

 

 

 

Water in crankcase

High humidity

Reduce oil change interval

 

 

 

Worn seals

Replace seals

 

 

 

 

 

Noisy Operation

Worn bearings

Replace bearings, Refill crankcase

 

 

Cavitation

oil with recommended lubricant

 

 

 

Check inlet lines for restrictions

 

 

 

 

and/or proper sizing

 

 

 

 

 

Rough/Pulsating

Worn packing

Replace packing

 

Operation with

Inlet restriction

Check system for stoppage, air leaks,

Pressure Drop

 

correctly sized inlet plumbing to pump

 

 

Accumulator pressure

Recharge/Replace accumulator

 

 

 

Check for proper operation

 

 

 

Unloader

Check inlet lines for restrictions

 

 

 

Cavitation

and/or proper size

 

 

 

 

 

 

 

 

Restricted discharge plumbing

Re-size discharge plumbing to

flow rate

Pressure Drop at Gun

of pump

 

 

 

 

 

Excessive Leakage

Worn plungers

Replace plungers

 

 

 

Worn packing/seals

Adjust or Replace packing seals

 

 

Excessive vacuum

Reduce suction vacuum

 

 

 

Cracked plungers

Replace plungers

 

 

 

Inlet pressure too high

Reduce inlet pressure

 

 

 

 

 

High Crankcase

Wrong Grade of oil

Giant oil is recommended

 

Temperature

Improper amount of oil in crankcase

Adjust oil level to proper amount

Preventative Maintenance Check-List & Recommended Spare Parts List

 

 

 

 

 

 

 

 

 

 

Check

Daily

Weekly

50hrs

Every

Every

 

Every

 

 

 

 

 

 

 

500 hrs

1500 hrs

 

3000 hrs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Oil Level/Quality

X

 

 

 

 

 

 

 

Oil Leaks

X

 

 

 

 

 

 

 

Water Leaks

X

 

 

 

 

 

 

 

Belts, Pulley

 

X

 

 

 

 

 

 

Plumbing

 

X

 

 

 

 

 

 

 

 

Recommended Spare

Parts

 

 

 

 

Oil Change (1 Gallon) p/n 1154

 

 

X

X

 

 

 

 

Oil Seal Kit (1 kit/pump)

 

 

 

 

X

 

 

 

(See page 5 for kit lit)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valve Spare Parts (1 kit/pump)

 

 

 

 

 

 

X

 

(See page 5 for kit list)

 

 

 

 

 

 

 

10

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Contents Contents Updated 5/02Installation Instructions Important Operating ConditionsLP200 Horsepower Requirements Model LP200Exploded View LP200, LP250 & LP250W-MT LP200, LP250 & LP250W-MT Repair Kits LP200, LP250 & LP250W-MT Parts ListLP250W-MT LP250 Horsepower Requirements Model LP250, LP250W-MTLP200, LP250 & LP250W-MT Repair Instructions 44A 44BLP200, LP250 & LP250W-MT Repair Instructions Bushings LP200, LP250 & LP250W-MT Torque SpecificationsPosition Item# Description Pulley & SheavesPump System Malfunction Malfunction Cause RemedyLP200, LP250 & LP250W-MT Dimensions Giant Industries Limited Warranty

LP250W-MT, LP250, LP200 specifications

The Giant LP200, LP250, and LP250W-MT are exceptional machines in the realm of compact excavators, known for their versatility, powerful performance, and advanced technology. These models are designed to meet the demanding needs of professionals in construction, landscaping, and agricultural applications.

The Giant LP200 is a compact yet robust machine that excels in various terrains. With a powerful engine and a unique oscillating rear axle, the LP200 provides superior stability and maneuverability. Weighing approximately 2000 kg, it can easily navigate tight spaces while delivering impressive lifting capabilities. Its articulated steering allows for a tight turning radius, making it suitable for urban construction sites or confined areas. The LP200 also features a hydraulic system that offers high flow rates, enabling it to power a range of attachments, from buckets to augers, enhancing its versatility.

Moving up the line, the Giant LP250 model boasts a larger size and increased power. Its enhanced engine output ensures that it can tackle heavier tasks while maintaining efficiency. The LP250 is equipped with a state-of-the-art hydraulic system, providing additional performance and support for a variety of attachments. Specifically designed for heavy-duty operations, this model can handle larger loads with ease, making it an ideal choice for construction and industrial applications. The LP250 also features a comfortable cab, designed for operator convenience with intuitive controls and excellent visibility.

The LP250W-MT variant takes the capabilities of the LP250 further by incorporating a wheel loader configuration. This model is particularly suited for agricultural environments, where mobility on softer terrains is essential. The LP250W-MT combines the power of an excavator with the agility of a wheel loader, allowing operators to perform tasks such as loading, lifting, and transporting materials effectively. Its unique wheel design and higher ground clearance enhance its ability to maneuver across various surfaces, while the advanced hydraulic system ensures precision in handling attachments.

All three models feature cutting-edge technologies that set them apart, including advanced safety features and user-friendly controls. They are equipped with powerful engines that comply with modern emission standards, ensuring they are environmentally friendly while delivering top-notch performance. These excavators also come with customizable options, allowing users to choose the attachments and configurations that best meet their specific requirements.

In summary, the Giant LP200, LP250, and LP250W-MT are powerful, versatile machines designed to excel in various tasks. With advanced technology and robust performance characteristics, these compact excavators are ideal for any professional looking to enhance productivity and efficiency on the job site.