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Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. Always use a board or cardboard when checking for a leak. |
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Personal injury or death can result if two persons are not used in the following procedure. |
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Personal injury or death can result from a brake malfunction. Do not operate the machine if the parking brake was engaged due to a malfunction of the hydraulic oil system or the service brakes. Correct any problem before attempting to operate the machine. |
| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, PERJ1017, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
Note: Be sure to keep oil off the parking brake disc and pads. Pads that have been in contact with oil need to be replaced.
| 980M/982M Parking Brake Adjustment | ||
| Machine | Gear & RPM | Actual |
| 980M | Second Gear Forward
1590 RPM |
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| 982M | Second Gear Forward
1440 RPM |
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This information includes the following adjustment:
- Parking Brake Adjustment
| Required Parts | ||
|---|---|---|
| Qty | Part Number | Description |
| 1 | 1U-5230 | Hand Hydraulic Pump |
| 1 | 6V-4144 | Quick Connect Coupler |
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| Illustration 1 | g03116679 |
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Steering frame in locked position | |
- Drive machine to a smooth level surface. Move steering frame lock to the LOCKED position. Turn the engine start switch to the OFF position.
- Put blocks in front of the wheels and behind the wheels. The blocks will prevent the machine from moving when the parking brake is disengaged.
Parking Brake Adjust Procedure
- Disengage the parking brake.
Show/hide table
Illustration 2 g06257818 Location to install required tooling - Install required tooling in the location shown in illustration 2. Apply hydraulic pressure to the brake
15160 to 19290 kPa (2200 to 2800 psi) .Show/hide table
Illustration 3 g03676590 - Loosen jam nut (1) Using a 9/16 inch wrench.
- Use feeler gages to measure the clearance between the front pad and the rotor. Turn centering bolt until clearance is
0.35 ± 0.10 mm (0.014 ± 0.004 inch) and tighten jam nut.Show/hide table
Illustration 4 g03684633 - Remove the cap covering the adjustment screw (6).
- Using a ratchet wrench and 1/2 inch socket, turn the screw (6) until the rear pad (5) to rotor (4) gap is
0.35 ± 0.10 mm (0.014 ± 0.004 inch) . Use feeler gage to measure clearance. Reinstall the dust cap. - Release the hydraulic pressure.
- Start the engine, engage the parking brake, and place the gear selector in manual mode.
- Move the direction control from "F" to "N" to "F" with in 3 seconds. The parking brake lockout is now disabled.
- Select the second gear forward. Slowly increase the engine to high idle while monitoring the RPM. Refer to Table 1. If machine holds at RPM, brake check is complete. If the machine moves before RPM is reached, go to step 4
- Turn the engine start switch to the OFF position. Install the steering lock engage the parking brake and chock the wheels.
- Readjust park brake to
0.35 mm (0.014 inch) running clearance between each pad and disc, using the adjust procedure outlined in the previous section. - Repeat Step 1 through Step 3. If machine still does not meet the required engine speed, replace brake pads.