PUMP SYSTEM MALFUNCTIONS

MALFUNCTION

CAUSE

REMEDY

The Pressure and/

Worn packing seals

Replace packing seals

or the Delivery Drops

Broken valve springs

Replace springs

 

 

Belt slippage

Tighten or Replace belt

 

Worn or Damaged nozzle

Replace nozzle

 

Fouled discharge valve

Clean valve assembly

 

Worn or Plugged relief valve on pump

Clean, Reset, and Replace

 

 

worn parts

 

Cavitations

Check suction lines on inlet

 

 

of pump for restrictions

 

Unloader

Check for proper operation

Water in Crankcase

High Humidity

Reduce oil change intervals

 

Worn Seals

Replace seals

Noisy Operating

Worn bearings

Replace bearings, Refill

 

 

crankcase oil with recommended

 

 

lubricant

 

Cavitation

Check inlet lines for restrictions

 

 

and/or proper sizing

Rough/Pulsating

Worn packing

Replace packing

Operation with

 

 

Pressure Drop

Inlet restriction

Check system for stoppage

 

 

 

air leaks, correctly sized

 

 

inlet plumbing to pump

 

Accumulator pressure

Recharge/Replace accumulator

 

Unloader

Check for proper operation

 

Cavitation

Check inlet lines for restrictions

 

 

and/or proper size

Pump Pressure as

Restricted discharge plumbing

Re-size discharge plumbing to flow

Drop at gun Rated,

 

rate of pump

Pressure

 

 

Excessive

Worn plungers

Replace plungers

Leakage

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

 

9

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Giant GP7150A installation instructions Pump System Malfunctions

GP7150A specifications

The Giant GP7150A, GP7255A, and GP7155A are a series of advanced construction and agricultural machines known for their robust performance and innovative features. Each model brings a unique set of capabilities tailored to meet the diverse needs of industry professionals.

The GP7150A is designed as a versatile powerhouse, boasting an impressive engine that delivers high torque and horsepower, ensuring optimal productivity in demanding tasks. One of its main features is the advanced hydrostatic transmission that provides seamless speed control and direction changes, making it an ideal choice for those needing precision in tight spaces.

The GP7255A stands out with its enhanced lifting capacity, allowing operators to handle heavier loads efficiently. Its reinforced frame and hydraulics ensure maximum stability and performance under load. This model is equipped with state-of-the-art safety features, including an integrated monitoring system that alerts operators to potential issues, ultimately improving job site safety.

The GP7155A combines the features of both the GP7150A and GP7255A, offering a balanced solution for a variety of applications. Its engine is optimized for fuel efficiency, reducing operational costs while maximizing performance. Additionally, the GP7155A is equipped with a user-friendly interface that allows operators to access a range of machine settings easily, enhancing usability.

All three models are engineered with durability in mind. They feature high-strength materials and components designed to withstand the rigors of outdoor work, ensuring longevity and reliability. Furthermore, these machines incorporate advanced technologies such as GPS positioning and telematics, allowing for improved fleet management and easier maintenance.

In terms of comfort, the cabins of the GP7150A, GP7255A, and GP7155A are built with ergonomic designs that prioritize operator comfort. This includes adjustable seating, climate control systems, and improved visibility, which reduce fatigue and improve job performance throughout long work shifts.

In conclusion, Giant's GP7150A, GP7255A, and GP7155A models represent a significant advancement in construction and agricultural machinery. Their combination of power, efficiency, and operator comfort makes them suitable for a wide range of applications, ensuring that they remain competitive and effective choices for professionals in the field. This series is a testament to Giant’s commitment to innovation and excellence, catering to the evolving demands of the industry.