Concrete Breaker

To determine the degree of slope you can traverse with the attachment installed on a traction unit, find the stability rating for the hill position you want to travel in the appropriate table below, then find the degree of slope for the same rating and hill position in the Stability Data section of the Operator’s Manual for the traction unit.

Note: If you have a traction unit other than a TX series traction unit, do not use the counterweight with the breaker or the traction unit will be less stable in the front and side uphill positions.

Orientation	Stability Rating
Front Uphill	D
Rear Uphill	D
Side Uphill	C

1. Park the machine on a level surface.

2. Raise the horizontal breaker so that it is about 15 cm (6 inches) off the ground.

3. Stop the engine and remove the key.

   Caution

   If you leave the key in the ignition switch, someone could accidently start the engine and seriously injure you or other bystanders.

   Remove the key from the ignition before you do any maintenance.

4. Using a hammer and punch, remove the 2 elastic pins out of the breaker housing to gain access to the retaining pins (Figure 2).

   Note: Remove both front and rear pins.

   

   Figure 2

   1. Elastic pin
   2. Retaining pin
   3. Bit
   4. Notch
   5. Grease here.

5. Using a hammer and punch, remove the 2 bit-retaining pins from the breaker housing (Figure 2).

   Note: Removing the bit-retaining pins may require considerable force.

6. Apply grease completely over the top 15 cm (6 inches) of the bit (Figure 2)

7. Slide the bit into the breaker with the 2 notches in the bit in line with the retaining-pin holes (Figure 2).

8. Hold the bit in place and insert the 2 bit-retaining pins into the breaker housing (Figure 2).

9. Drive the pins into place with a hammer (Figure 2).

10. Insert the 2 elastic pins into the breaker housing and drive them into place over the retaining pins with a hammer (Figure 2)

11. Grease the bit before use; refer to Greasing the Bit.

Note: To change bits, repeat this procedure.

1. Tilt the breaker as far forward as possible and lower it until the tip is resting on the ground.

2. Remove the snapper pin securing the front mounting pin (Figure 3).

   

   Figure 3

   1. Snapper pin
   2. Front breaker pin
   3. Upper holes

3. Remove the front breaker pin from the breaker (Figure 3).

4. Lower the loader arms until the holes in the breaker align with the upper holes in the mount (Figure 4).

5. Install the front mounting pin in the upper holes and secure it with the snapper pin (Figure 3).

1. Position the bit on the vertical surface in the same manner as you would position it on a horizontal surface.

2. Maintain pressure on the bit by driving the traction unit forward into the vertical surface while operating the breaker.

3. Periodically lower the the breaker to a vertical position to allow debris that may have collected in the breaker to fall out.

Use the following table to choose the most suitable tool for operation:

Note: Specifications and design are subject to change without notice.

• Wear eye, ear, and breathing protection while using the breaker.

• If your traction unit is a TX series traction unit, use 3/4 throttle when breaking to prevent damage to the breaker.

• If you have a traction unit other than a TX series traction unit, use full throttle (maximum engine speed), low range (turtle position) on the speed-selector lever, and adjust the flow-divider valve to approximately the 10 o’clock position.

• Place the bit within 15 to 46 cm (6 to 18 inches) of the edge of the material to be broken, and angle the breaker slightly toward the edge (Figure 4).

  

  Figure 4

• If the bit is positioned too far from the edge of the material, the material may absorb the energy and not break. If the material has not cracked after 15 to 20 seconds, stop the breaker and move the bit to a different location.

• When breaking, always apply downward pressure with the loader arms until the front of the traction unit raises off the ground a few inches (Figure 4). Maintain this pressure as the bit works its way into the material being broken.

• Do not move the auxiliary hydraulics lever to engage the breaker unless the bit is on the ground and downward pressure is applied.

• Do not bind the bit in the material being cut. Binding of the bit can cause the bit to bend or wear out prematurely. Ensure that all force applied to the breaker is inline with the bit, not side to side or front to back. This requires frequent adjustments in the positioning of the traction unit.

• Listen to the sound of the breaker when is operating. The sound changes when downward pressure decreases. If the downward pressure from the unit is too weak, you will hear metallic strokes from the hammer as it incorrectly strikes the bit.

• Excessive downward pressure produces strong vibrations in the unit.

• Many materials do not respond well to continuous hammering in one place. Each time that the breaker penetrates the material without breaking it, move it to a new location in a line parallel to the edge of the material, about 7.6 cm (3 inches) from the previous hole. This scores the material and if done repeatedly, breaks off a large piece of the material (Fig. 3).

  

  Figure 5

• If you are breaking rebar-reinforced concrete, use a chisel bit in the breaker to cut through the rebars in the concrete. You can also cut the rebar with a torch.

Grease type: No. 1 or No. 2 general-purpose grease

1. Tilt the breaker so that it is vertical and lower it to the ground to push the bit up into the breaker until it stops.

   Important: If you do not push the bit up into the breaker before greasing, grease may fill the space between the top of the bit and the breaker piston. This causes the piston to pressurize the grease and damage the seal when you next use the breaker.

2. Stop the engine and remove the key.

3. Clean the grease fitting with a rag.

4. Connect a grease gun to the fitting (Figure 6).

   

   Figure 6

5. Pump grease into the fitting until either grease begins to ooze out of the lower bushing and retaining pin or pumping the grease gun becomes difficult.

6. Wipe up any excess grease.

Inside the breaker is an accumulator, a chamber of pressurized nitrogen. After several hours of use the pressure may decrease, reducing the performance of the breaker.

Strong vibrations in the auxiliary hydraulic hoses are a sign the pressure is dropping in the chamber. If this should happen, bring the breaker to your Authorized Toro Dealer to be charged.