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.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (10 of 19) [4/3/2005 10:38:16 AM] Service MiscellaneousMX41671.Loosen tie rod nut (A) on both tie rod ends.2.Turn tie rod (B) until toe-in is within correct specification.IMPORTANT: Avoid damage! Ball joints must move freely after you tighten tierod nuts.3.Tighten both tie rod nuts completely.Checking Wheel Bolt Torquec CAUTION: Avoid injury! To prevent possible tractor roll over, neveroperate tractor with a loose rim, hub, or axle.Anytime hardware is loosened, it MUST be retightened to specified torque.Check wheel bolt torque as follows:· After driving tractor about 100 m (109 yd), and before placing it under load,retighten hardware to specified torque.· Check hardware after operating tractor for 3 hours and again after 10 hours.· Check all hardware frequently and keep it tight.Front Wheel Boltsfile:///C|/projects/jd/manuals/utility/990/manuals.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (11 of 19) [4/3/2005 10:38:16 AM] Service MiscellaneousMX4157Tighten front wheel disk-to-flange bolts (A) to 155 N·m (114 lb-ft).MX41592WD Tractors Only: Tighten front axle bolts (B) to 260 N·m (190 lb-ft).Rear Wheel Boltsfile:///C|/projects/jd/manuals/utility/990/manuals.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (12 of 19) [4/3/2005 10:38:16 AM] Service MiscellaneousMX4158Tighten rear wheel disk-to-flange bolts (A) to 155 N·m (114 lb-ft).Torque the rear wheel rim-to-disk bolts (B) to 240 N·m (177 lb-ft).Checking Tire Pressurec CAUTION: Avoid injury! Explosive separation of a tire and rim partscan cause serious injury or death.Do not attempt to mount a tire without the proper equipment and experienceto perform the job.Always maintain the correct tire pressure.Do not inflate the tires above therecommended pressure.Never weld or heat a wheel and tire assembly.Theheat can cause an increase in air pressure resulting in a tire explosion.Weldingcan structurally weaken or deform the wheel.When inflating tires, use a clip-on chuck and extension hose long enough toallow you to stand to one side and NOT in front of or over the tire assembly.Check tires for low pressure, cuts, bubbles, damaged rims or missing lug boltsand nuts.file:///C|/projects/jd/manuals/utility/990/manuals.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (13 of 19) [4/3/2005 10:38:16 AM] Service MiscellaneousMIFNOTE: If tire is liquid filled (A), always keep valve stem (B) at top of tire whenchecking air pressure.This prevents liquid from escaping through valve stem.Maximum tire pressure (C) is embossed into tire side wall.1.Check tires for damage.2.Check tire pressure with an accurate gauge.3.Add air, if necessary.Front Tire Inflation PressuresUnloaded Tire Loaded TireTire Size Ply RatingkPa (psi) kPa (psi)6.5-16 6 83 (12) 330 (48)27x10.50-15 4 83 (12) 221 (32)8-16 6 83 (12) 241 (35)10-16.5 6 83 (12) 310 (45)Rear Tire Inflation Pressuresfile:///C|/projects/jd/manuals/utility/990/manuals.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (14 of 19) [4/3/2005 10:38:16 AM] Service MiscellaneousUnloaded Tire Loaded TireTire Size Ply RatingkPa (psi) kPa (psi)14.9-24 4 69 (10) 83 (12)44x18-20 4 83 (12) 140 (20)17.5L-24 8 83 (12) 180 (26)Checking and Adjusting Brakes1.Stop machine on a level surface.Do not lock park brake.2.Leave machine in gear.STOP engine and remove key.3.Unlatch the brake pedals.Checking Brake AdjustmentMX41601.Pull down on each brake pedal and measure the free travel distance (A) thatthe pedal pivots from top of stroke to the point before brake engagementoccurs.2.Adjust both brakes if free travel for either pedal is greater than 35 mm (1-3/8in.) or if it is not the same for both pedals.Adjusting Brakesfile:///C|/projects/jd/manuals/utility/990/manuals.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (15 of 19) [4/3/2005 10:38:16 AM] Service Miscellaneousc CAUTION: Avoid injury! Both brake pedals must be adjusted evenlyto prevent pulling to one side of tractor when locked brakes pedals are applied.MX41611.Loosen linkage rod lock nuts (A).NOTE: If brake linkage has no adjustment remaining, see your John Deeredealer for service.2.Rotate turnbuckle (B) to shorten length of rod (C) so pedal free travel is 25mm (1 in.).3.Tighten the lock nuts completely.4.Repeat for other brake pedal.Adjust to same distance.Checking and Adjusting ClutchChecking Clutch Adjustmentfile:///C|/projects/jd/manuals/utility/990/manuals.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (16 of 19) [4/3/2005 10:38:16 AM] Service MiscellaneousMX41621.Pull down on clutch pedal and measure the free travel distance (A) that thepedal pivots from top of stroke to the point before clutch engagement occurs.2.Adjust clutch if free travel is greater than 25 mm (1 in.).Adjusting ClutchMX41631.Remove screws and flat washers (A) from panels to provide clearance forremoval of left footwell plate (B).file:///C|/projects/jd/manuals/utility/990/manuals.m/cceomview/omlvu10907_a0/output/lvu10907na12.html (17 of 19) [4/3/2005 10:38:16 AM] Service MiscellaneousMX41642.Remove cotter pin (C) and rubber washer (D) from three locations at bottomside of footwell plate.3.Lift and remove footwell plate from tractor.MX41654.Loosen linkage rod lock nuts (E).NOTE: If clutch linkage has no remaining adjustment, see your John Deeredealer for service.5.Rotate turnbuckle (F) to shorten length of rod (G) so pedal free travel is 15 -25 mm (5/8 - 1 in.).6
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