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RG25DH Operation • Service • Maintenance • Parts Manual

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4. Check all parts for wear, cracks, or damage, and that

ejector area is clean.

5. Install new element(s)
6. Reinstall end cap(s) with dust ejector valve/screen down:

secure with retaining clips.

Breather Tube

Ensure both ends of breather tube are properly connected.

Cutting Wheel - Check

Among the most critical elements of the stump cutter are
the cutting teeth. They are also the most subject to damage
and wear. In the course of cutting stumps they not only make
contact with wood, but also encounter a numerous assortment
of abrasives and objects in the stump’s environment, such as
dirt, stones, and occasionally a large rock or buried scrap. The
loss of and wear of teeth can significantly impair the efficiency
of a stump cutter and also result in overexposure of other
teeth and tooth pockets, resulting in premature failure or wear.
Therefore it is important to make frequent observation of
the condition of all of the cutting teeth, and replace or have
sharpened any missing and significantly worn teeth, as
soon as feasible.

Rayco Teeth

Rayco Manufacturing Inc. recommends only genuine Rayco
Cutting Tools for use on Rayco Stump Cutters and Forestry
Mowers. The use of non-Rayco cutting tools or cutting
wheels will void the machine warranty. Rayco’s cutting tools,
cutting wheels, and mower rotors are specifically designed
to provide optimum performance in many ways. The use of
non-Rayco parts will compromise this optimum performance.

• Safety: Rayco’s cutting tools are always attached with at

least two fasteners. This redundant fastening system is

far safer than those systems employing only one fastener.

Rayco’s cutting tools are also more visible than some of

the other cutting tools that are available. Some of the

cutting wheels available today are “transparent” which

can lead to an operator or bystander becoming confused

as to the actual limits of the cutter tool.

• Proper Balance: Rayco’s cutting wheels and mower

rotors are designed to achieve a dynamic balance that

avoids vibration. Using other cutting tools can set

up vibrations that will harm the machine’s structure &

reduce bearing life.

• Number of Teeth for Depth of Cut: Rayco’s cutter wheels

are designed to provide an economical cutting wheel

assembly solution. The teeth are spaced to provide a

maximum depth of cut for the number of teeth on the

wheel. Some of the wheels available today use a large

quantity of teeth to get the same depth of cut that a

Rayco wheel will achieve with half the teeth. While the

individual tooth cost may be less, the overall costs are

more. Additionally, having too many teeth in the stump

at any one time can lead to aggressive “grabbing” of the

stump, causing the stump cutter to violently hop. This

can cause injury to both man & machine.

• Tooth Projection: Rayco’s stump cutter teeth are

specifically designed to ensure that the carbide tip can

remove a clear “kerf” from the stump without the body

of the tooth ever contacting the stump. This concept

reduces drag, which maximizes the use of the machine’s

horsepower. This also reduces wear on the tooth body

and on the attachment hardware. Many of the other

cutting tool systems available today do not address this

important aspect of cutting.

• Cutting Tool Dimensions: Rayco’s stump cutting teeth

are carefully designed to have the proper size of carbide

tip. Carbide tips ultimately become dull, and using

large, oversized carbide tips will induce extreme impact

energies into the machine’s structure.

• Debris Retention: Rayco’s cutting tool patterns are

designed to minimize the retention of debris in between

the cutting tools. This debris can cause imbalance. This

debris can also become a dangerous projectile. Non-

Rayco cutting tools may retain more debris.

Changing Teeth

1. Clean all dirt from cutting wheel (5) and teeth (6).
2. Remove the socket head bolts (6) from the teeth. (The

1/2” hex key provided with the machine may be used.)

3. Check the cutting wheel for cracks. Replace the wheel

if it is cracked.

4. Carefully select and properly position each tooth

according to diagrams.

Maintenance

SUPPORT THE CUTTER WHEEL IN A RAISED

POSITION WHEN CHANGING TEETH.

NOTICE

Read all of the following instructions before
beginning to change the cutting teeth. The
following illustrations represents the exact location
required for positioning each tooth. Please follow
the diagrams very closely for good cutting wheel
performance.