Parts list: № Number Qty Name Options 1 AR55421 1 SPRING (SUB R51302) Next page: 70-16 LEVER LOCK ( -1977) FOR JOHN DEERE 7020 TRACTORS ( -001,815) LIFT ASSIST WHEEL HYDRAULIC MAST ATTACHMENT [B09] 70-17 LEVER LOCK ( -1977) FOR JOHN DEERE 2510, 3010 AND 3020 ( -122,999), 4010 AND 4020 ( -200,999) 5010 AND 5020 TRACTORS USING JOHN DEERE HYDRAULIC SYSTEM LIFT ASSIST WHEEL HYDRAULIC MAST ATTACHMENT [B10] 70-17 LEVER LOCK ( -1977) FOR JOHN DEERE 4030, 4230, 4430 AND 4630 TRACTORS LIFT ASSIST WHEEL HYDRAULIC MAST ATTACHMENT [B10] 70-18 LEVER LOCK ( -1977) FOR JOHN DEERE 4030, 4230, 4430 AND 4630 TRACTORS LIFT ASSIST WHEEL HYDRAULIC MAST ATTACHMENT [B11] 70-19 HYDRAULIC MAST ( -1977) [B12] 70-15 SINGLE LEVER CONTROL FOR LIFT ASSIST WHEELS AND TRACTOR ROCK SHAFT [B08] 70-14 HYDRAULIC COUPLERS AND HOSES ( -1981) TO CONNECT LIFT ASSIST WHEELS IN PARALLEL WITH TRACTOR ROCKSHAFT [B07] 70-13A TRACTOR ROCKSHAFT PISTON COVER ( -1981) REQUIRED FOR 4040, 4240, AND 4440 TRACTORS SIMULTANEOUS ROCKSHAFT AND LIFT ASSIST WHEEL OPERATION [B06] 70-13 TRACTOR ROCKSHAFT PISTON COVER ( -1981) REQUIRED FOR 4040, 4240, AND 4440 TRACTORS SIMULTANEOUS ROCKSHAFT AND LIFT ASSIST WHEEL OPERATION [B05] 70-12 TRACTOR ROCKSHAFT PISTON COVERS ( -1981) REQUIRED FOR 4030, 4230, 4430, 4630, 4320, 4520 AND 4620 TRACTORS; ALSO FOR 4020 TRACTORS; SERIAL NO. 201,000 AND UP, TO CONNECT LIFT ASSIST WHEELS IN PARALLEL WITH TRACTOR ROCKSHAFT [B04]