Brake Pedal Stop Bolt May Become Loose on Certain F2-Series Backhoe Loaders {4251} Caterpillar

Backhoe Loader

415F2 (S/N: HWA534-535,538-538,542-542,544-544,549-UP)

415F2 IL (S/N: PF4679-679,682-UP)

416F2 (S/N: LYA408-409,421-UP; HWB1262-1263,1269-1270,1280-1280,1282-1286,1290-1291,1296-UP)

420F2 IT (S/N: LYC522-528,533-533,535-UP; HWD2051-2056,2062-2063,2065-2066,2068-2069,2071-2072,2074-2075,2077-2077,2080-2080,2082-2082,2087-2087,2120-2133,2135-2135,2137-2137,2143-2153,2159-UP)

420F2 ST (S/N: HWC2651-2651,2654-2656,2668-2670,2672-2672,2723-2736,2738-2738,2740-2749,2751-2753,2755-2756,2760-UP)

422F2 (S/N: LYF894-895,902-UP)

427F2 (S/N: HWK340-340,344-UP)

428F2 (S/N: LYG2355-2355,2391-2391,2393-2394,2396-2461; HWN763-763,765-765,779-807,812-814,816-817,819-819,822-824,828-UP)

430F2 IT (S/N: HWG500-500,506-508,510-UP)

430F2 ST (S/N: HWE699-702,704-UP)

432F2 (S/N: LYJ668-669,678-UP; HWP1347-1348,1376-1440,1442-1445,1447-1447,1457-UP)

434F2 (S/N: LYK409-412,417-UP; HWR256-UP)

444F2 (S/N: LYL411-411,415-UP; HWS451-451,454-465,467-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

On machines listed above, thread locking may have been omitted during the assembly process. 6V-7357 Bolt may loosen if thread locking compound is missing. The loose bolt can cause the brake pedal not fully to release while not in use. This action can result in brake "drag" or the rear brake lights to stay on unintentionally.

Solution

Illustration 1	g06251953

Check 6V-7357 Bolt (1) for correct adjustment. If bolt (1) is loose, reinstall using medium strength Loctite 243. Set the clearance (D1) to 0.6 mm (0.024 inch) and tighten locking nut (2) to 12 N·m (106 lb in).