Section VII. RADIO INTERFERENCE SUPPRESSION

TM 10-3930-631-12

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2 Check for glazed brake linings.

Replace glazed brake shoes (para 4-.34.

11 EXCESSIVE BRAKE PEDAL TRAVEL REQUIRED TO APPLY BRAKES.

Step 1. Check for air in brake hvdraulic system

Pump pedal several times If pressure builds up to hold pedal to normal travel. bleed brake system (para 4-33)

Step 2 Check oil supply in master cylinder

Fill master cylinder if necessary Para 4-33).

12 TRUCK PULLS TO ONE SIDE WHEN BRAKES ARE APPLIED.

Step 1 Check for oil or grease on brake lining

Replace brake shoes Para 4.34).

Step 2. Check for wear or broken brake shoe return spring

Replace weak or broken spring (para 4-34)

Step 3. Check for defective wheel cylinder

Replace defective cylinder Para 4-35)

13. PARKING BRAKE DRAGS.

Step 1. Check for improperly adjusted linkage.

Adjust linkage (para 4-31).

Step 2. Check for defective parking brake.

If brake is defective, notify direct and general support maintenance personnel.

14. STEERING MECHANISM NOT OPERATING PROPERLY.

Step 1. Check hydraulic system for leaks.

Tighten loose connections or replace hydraulic lines Para 4-41)

Step 2. Check steering tie rod adjustment.

Adjust steering tie rod (para 4-40).

Step 3. Check steering cylinder for leaks and proper operation.

Replace steering cylinder (para 4-41).

Step 4. Check hydraulic pump and valve for leaks.

If components are leaking, notify direct and general support maintenance personnel.

15. HORN DOES NOT SOUND.

Step 1. Check for defective horn button.

Replace defective horn button (para 4-25).

Step 2. Check for defective fuse.

Replace defective fuse (para 4-27).

Step 3. Check for loose wire.

Tighten loose connections.

Step 4. Check for improperly adjusted or defective seat switch.

Adjust or replace seat switch (para 4-31).

Step 5. Check for defective horn.

Replace horn (para 4-25).

Section VII. RADIO INTERFERENCE SUPPRESSION

41) attached to the drive motor flange below the drive

4-17. General

Methods

Obtain

Proper

axle.

Suppression

4-19. Replacement of Suppression Components

Essentially, suppression is obtained by providing a

a. Remove drip pan from beneath truck.

low resistance path to ground for stray currents. The

Remove two screws and lock washers

methods used include grounding the frame with bonding

attaching drive motor to drive axle and remove two

straps and using capacitors and resistors.

bonding straps (fig. 4-41).

4-18. Interference Suppression Components

c. Install bonding straps on flange and secure with

Radio interference suppression in the fork lift truck

two screws and lock washers.

is obtained through the use of two bonding straps (fig. 4-

d. Install drip pan.

4-7