TROUBLESHOOTING (Continued)

 

 

 

 

 

Problem

 

Cause

 

Correction

 

 

 

 

 

 

Machine loses power after

 

Diverter valve on prime move

 

Diverter valve may need rebuilding or

 

 

operating satisfactorily

 

leaking or bypassing oil internally

 

replacing.

 

initially

 

through valve to reservoir

 

 

 

 

 

 

 

Excessive back pressure

 

Relieve condition. Restriction may be

 

 

 

 

 

 

 

 

from outlet to reservoir.

 

 

 

Relief valve setting in backhoe

 

Relief pressure will have to be checked

 

 

 

 

control valve too low or defective

 

and corrections made. Backhoe

 

 

 

 

 

 

 

system pressure is 2000 PSI (CBH60),

 

 

 

 

 

 

 

2250 PSI (CBH70), 2550 PSI (CBH80),

 

 

 

 

 

 

 

Relief valve may need cleaning and

 

 

 

 

 

 

 

overhauling, or entire cartridge must be

 

 

 

 

 

 

 

replaced.

 

Loss of power in lift or

 

Spool not moved to full stroke

 

Check spool travel - should be .16”

 

 

crowd cylinder, but other

 

 

 

 

 

either way or a total of .32” for CBH60.

 

cylinders function properly

 

 

 

 

 

Check spool travel- should be .28”

 

 

 

 

 

 

 

either way, or a total of .56”. for

 

 

 

 

 

 

 

CBH70 and CBH80.

 

 

 

Overload relief valve in the control

 

Clean relief carefully but do not disturb

 

 

 

 

valve stuck open or malfunctioning

 

its pressure setting as it cannot be field

 

 

 

 

 

 

 

calibrated, or replace cartridge.

 

 

 

Problems involving the control

 

This valve is a precision device and is

 

 

 

 

valve

 

not intended for any extensive field

 

 

 

 

 

 

 

adjustment or repair. Field replace-

 

 

 

 

 

 

 

ment parts are limited to seal kits,

 

 

 

 

 

 

 

cartridges, valve sections and tie rods.

 

 

 

 

 

 

 

Replacement of these parts, the

 

 

 

 

 

 

 

opening of check cavities and certain

 

 

 

 

 

 

 

relief cavities to examine for trapped

 

 

 

 

 

 

 

dirt, or resetting of the main relief valve

 

 

 

 

 

 

 

with the use of good pressure gauge,

 

 

 

 

 

 

 

should be referred to qualified service

 

 

 

 

 

 

 

personnel.

 

 

 

 

 

 

 

Dirt and shreds of packing material are

 

 

 

 

 

 

 

the usual causes of valve malfunction.

 

 

 

 

 

 

 

Be sure the reservoir oil supply is kept

 

 

 

 

 

 

 

clean and only factory supplied

 

 

 

 

 

 

 

packings are used in cylinder repair.

 

 

 

 

 

 

 

Everything must be clean and free of

 

 

 

 

 

 

 

dirt during oil line removal and

 

 

 

 

 

 

 

replacement, and during any cylinder

 

 

 

 

 

 

 

work.

 

Loss of power in any one

 

Loose oil line connections,

 

Tighten all hose connections and

 

 

cylinder, including lift

 

leaks in line or broken lines

 

replace any damaged O-rings at

 

and crowd

 

 

 

 

 

leaking O-ring fittings. Check and

 

 

 

 

 

 

 

replace any damaged hoses and lines.

 

 

 

Restrictions in oil lines

 

Check and replace any damaged hoses

 

 

 

 

 

 

 

 

and lines. Check for pinched hoses.

 

 

 

Oil is bypassing cylinder piston,

 

Replace or rebuild the cylinder; replace

 

 

 

 

scored piston, worn piston packing

 

damaged parts.

 

 

 

or defective piston assembly

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 20 Page 22
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Bush Hog CBH80, CBH60, CBH70 manual Troubleshooting
Page 20 Page 22

CBH60, CBH70, CBH80 specifications

The Bush Hog CBH Series is a prominent lineup of compact, high-performance hydraulic blade mowers ideal for maintaining fields, pastures, and overgrown areas. Comprising models CBH80, CBH70, and CBH60, this series is specifically designed for efficiency and durability, making it suitable for various applications, from agricultural uses to residential properties.

One of the standout features of the CBH Series is its robust construction. Each model is built with a heavy-duty frame designed to withstand the rigors of demanding tasks. The decks are made from high-quality steel, offering enhanced durability while maintaining a lightweight design to optimize performance. With reinforced edges and an innovative design, these mowers guarantee longevity and resistance to wear in challenging environments.

The CBH Series integrates advanced hydraulic systems that ensure smooth operation and maneuverability. The hydraulic drive provides excellent power transmission, allowing users to tackle even the most stubborn vegetation with ease. Each model features adjustable cutting height settings, which give users the flexibility to achieve the desired finish. This adaptability is essential for different terrains and types of foliage.

Another key characteristic of the CBH models is their user-friendly design. The intuitive controls allow for easy operation, making it accessible even for those who may not have extensive experience with machinery. The cutting decks feature a quick-release mechanism, streamlining maintenance and facilitating blade changes when necessary.

The CBH80, CBH70, and CBH60 differ mainly in their width and cutting capabilities. The CBH80 boasts an impressive cutting width of 80 inches, making it ideal for large open fields, while the CBH70 offers a 70-inch cutting width, perfectly balancing efficiency and maneuverability. The CBH60, with a width of 60 inches, is designed for tighter spaces, allowing for easy navigation around trees, fences, and other obstacles.

Safety is paramount in the design of the CBH Series. Each model incorporates features such as safety guards and shields to protect users from debris during operation. Furthermore, the mowers are equipped with a quick-stop system that halts blade rotation almost instantly when the operator releases control, enhancing overall safety.

In conclusion, the Bush Hog CBH Series, with its models CBH80, CBH70, and CBH60, embodies a harmonious blend of power, durability, and user-centric design. Equipped with innovative technologies and safety features, these mowers are well-suited for various operational needs, proving to be invaluable tools for anyone looking to maintain their land effectively. Whether you have extensive acres to manage or a smaller yard, the CBH Series offers the versatility and performance to meet your mowing requirements.
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