JOHN DEERE WORKSHOP MANUAL FOR ENGINE 3029

Page 164

Cooling System

Check Fan/Alternator Belt Tension

a. Use of JDG529 Tension Gauge (A) Fan/Alternator belt—Specification Single belt (New belt)—Tension ........... 578—622 N (130—140 Single belt (Used belt1 )—Tension ............. 378—423 N (85—94 Dual belt (New belt)—Tension ................. 423—467 N (95—104 Dual belt (Used belt1 )—Tension ................ 378—423 N (85—94

Use of tension tester (B) and straightedge (C)

CD30645

Specification Fan/Alternator belt—Tension................... 19 mm (0.75 in.) deflection with an 90 N (20 lb-force) halfway between pulleys

–UN–04MAY98

b.

lb-force) lb-force) lb-force) lb-force)

CD30644

NOTE: On engine with dual belts, check tension of front belt only.

–UN–04MAY98

1. Check belt tension using one of following methods:

A—JDG529 Tension gauge B—Tension tester C—Straightedge

1

Belts are considered used after 10 minutes of operation. CD,CTM125,166 –19–26JAN01–1/2

IMPORTANT: Do not pry against the alternator rear frame. Do not tighten or loosen belts while they are hot. 3. Tighten alternator bracket nuts firmly. 4. Run engine for 10 minutes then recheck belt tension.

–UN–04MAY98

2. If adjustment is necessary, loosen alternator nuts (D) and (E). Pull alternator frame outward until belt is correctly tensioned.

CD30646

30 8

CD,CTM125,166 –19–26JAN01–2/2

CTM125 (22MAR06)

30-8

POWERTECH 2.9 L Diesel Engines 032306

PN=160


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