Operator`s manual

RD 27 Maintenance

wc_tx000426gb.fm 77

5.26 Manually Releasing Parking Brakes

See Graphic: wc_gr002290

There are two drive motors on the roller—one on each drum. Each

drive motor includes a parking brake that is spring activated and

hydraulically released (SAHR).

To manually release the brakes:

Note: Carry out procedure on both drums.

5.26.1 Chock each drum to prevent the machine from moving.

5.26.2 Lock the articulated steering joint.

5.26.3 Remove the plugs (a) in order to access the release screws.

5.26.4 Press and turn each release screw in until its threads catch in the brake

plate. Tighten each screw until the spring on each screw is fully

compressed. You will feel a substantial difference in the amount of

torque required to turn the screw once its spring is fully compressed.

Then, continue to tighten (turn clockwise) the two release screws to

compress the brake plate springs. Alternate back-and-forth between

the two screws, turning approximately 45° at a time, until the drums are

no longer held by the brake plate. The brake plate should release after

turning each screw approximately 120° total. To test if the brake is free,

manually turn the drum.

5.26.5 Replace the plugs (a).

Note: After repair, ensure that the releasing screws are back in the

normal operating position.

Note: Replacement drive motors come with the brakes in the ON

position.

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