Lubrication & Maintenance/500 Hour/12 Month Checking Tensioner Spring Tension A belt tension gauge will not give an accurate measure of the belt tension when automatic spring tensioner is used. Measure tensioner spring tension using a torque wrench and procedure outlined below: 1. Release tension on belt using a breaker bar and socket on tension arm. Remove belt from pulleys. RG7977 –UN–14NOV97 NOTE: While belt is removed, inspect pulleys and bearings. Rotate and feel for hard turning or any unusual sounds. If pulleys or bearings need replacement, see your John Deere dealer. Marks on Tensioner 2. Release tension on tension arm and remove breaker bar. 3.
Put a mark (A) on swing arm of tensioner as shown. 4. Measure 21 mm (0.83 in.) from (A) and put a mark (B) on tensioner mounting base. RG8037C –UN–11SEP00 5. Install torque wrench (C) so that it is aligned with centers of pulley and tensioner. Rotate the swing arm using a torque wrench until marks (A and B) are aligned. Align Marks 6. Record torque wrench measurement and compare with specification below. Replace tensioner assembly as required. Specification Spring Tension—Torque 18-22 (13-16 lb-ft) ....................................... RG12065 –UN–28JAN02 NOTE:
Threads on belt tensioner roller cap screw are LEFT-HAND threads Align Torque Wrench With Pulley and Tensioner A—Mark On Swing Arm B—Mark On Tensioner Mounting Base C—Torque Wrench OURGP11,0000150 –19–06JAN04–3/3 30-15 021604 PN=152