BRAKES FAIL OR BRAKE PEDAL SPONGY.

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

BRAKES AND AIR SYSTEM

CAUTION

When repairing disc brakes, make sure stretch bolts for fastening brake caliper to

wheel hub drive housing are always fitted at side where disc emerges from pads.

Failure to do so could cause damage to equipment.

NOTE

Replace disc brake pads in sets for entire axle.

83.

BRAKES FAIL OR BRAKE PEDAL SPONGY.

Step 1.

Check for low brake fluid level in brake fluid reservoir.

If brake fluid level is low, add silicone brake fluid

(TM 5-2420-224-10).

If brake fluid level is not low, go to step 2.

Step 2.

Check for leaking and damaged hydraulic brake lines and fittings.

If hydraulic brake lines and fittings are leaking or damaged,

tighten or replace brake lines and fittings (pages 4-278, 4-280,

4-282, 4-284).

If hydraulic brake lines and fittings are not leaking or damaged,

go to step 3.

Step 3.

Check for air in hydraulic brake system.

If there is air in hydraulic brake system, bleed brake system

(page 4-262).

If there is no air in hydraulic brake system, replace brake

master cylinder (page 4-276).

84.

BRAKING UNEVEN.

Step 1.

Check hydraulic brake lines for kinks and restrictions.

If there are kinks or restrictions in hydraulic brake lines,

replace brake lines (pages 4-278, 4-280, 4-282, 4-284).

If there are no kinks or restrictions in hydraulic brake lines, go

to step 2.

Change 2

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