Model 2120 Tractor TM-4252 (Dec-70) General Information 10 Engine and Tractor Tune-up 20-5 STANDARD TORQUES Recommended torques in ft. lbs. and mkg for UNC and UNF cap screws Head marking / \ / ~7\ ATX (identifying ( ) - ' > f ; ;-> strength) v_ J \ _v xяv or or or 6.8 (6. S)* 10.9 (10 K)** 12.9 (12 K)*** Thread-O.D. (in.) ft .lbs. mkg ft .lbs. mkg ft Jbs. mkg 1/4 7 1 10 1,5 14 2 5/16 14 2 20 3 30 4 3/8 21 3 35 5 50 7 7/16 35 5 55 8 80 11 1/2 55 8 85 12 130 18 9/16 75 10 130 18 185 26 5/8 105 15 170 23,5 250 34,5 3/4 185 25,5 300 41,5 420 58 7/8 160**** 22**** 445 61,5 670 92,5 1 250 34,5 670 92,5 1000 138.5 NOTE: A variation off 10% is permissible for all torques indicated in this chart.
Torque figures indicated above and in the Specifications sections of this manual are valid for non-greased or non-oiled threads and heads unless otherwise specified. Therefore, do not grease or oil bolts or cap screws unless otherwise specified in this manual. * Regular bolts and cap screws Tempered steel high strength bolts and cap screws Tempered steel extra high strength bolts and cap screws Bolts and screws 7/8 in. and larger are often formed hot rather than cold, which accounts for the lower torque. 19.58-90-578 ........... Special adapter 19.58-90-260* ........... Special tool . .
Checking compression pressure Checking oil pressure SPECIAL TOOLS JD Parts Depot Manufacturer Description Use Part No. if ordered through * Details see section 70, group 5 Printed in Germany