Schmidt AmphiBlast 120, Руководство по эксплуатации и обслуживанию

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8.18. Trailer Axle Maintenance: (yearly hub/drum inspection and removal)
8.18.1. Removal of Hub
(1) Remove wheel.
(2) Remove dust cap.
(3) Remove cotter pin.
(4) Unscrew the spindle nut counter-clockwise.
(5) Remove spindle washer.
(6) Remove hub/drum from spindle.
(7) Inspect hub/drum for abnormal wear or scoring. Replace if needed.
8.18.2. Seal Replacement
(1) Seal should be replaced each time the hub is removed.
(2)
Pry the seal out of the hub with a screwdriver.
(3) Tap new seal into place.
8.18.3. Bearing Maintenance, Adjustments, and Replacements.
(1) Inspect for corrosion and wear.
(2) If any rust or wear exists on the bearing remove and replace it.
(3) If bearings are found to be in good condition, then cleaning and repacking the grease is all that is
needed. Note: Do not spin bearings with compressed air.
(4) Hand pack each bearing individually using a premium water resistant wheel bearing grease.
(5) Reinstall the hub, reversing the procedure above then adjust bearings per procedures below.
8.18.4. Bearing Adjustment
(1) Recommended Setting: The typical trailer hub uses a hardened washer and slotted hex nut for
bearing adjustment. Hubs are usually set with a free running clearance or endplay of 0.001” to
0.010”.
The use of a dial indicator is the only satisfactory method of checking adjustment.
(2) Feel and drag method: Tighten the slotted nut until the hub drags slightly when rotated (Rotating
the hub while tightening the nut seats the bearing.). Loosen the slotted nut 1/6th turn (1 Hex) to align
nut slot with the cotter pin hole. Wheel should turn freely. Insert new cotter pin through nut and
spindle. If necessary loosen,
never tighten , nut to align the slot with the hole in the spindle. Bend
one leg of the cotter pin over the end of the spindle and the other leg over the nut. Tap legs slightly
to set. Cotter pin must be tight.
(3) Torque Wrench Method: Make sure nut is loose. Tighten nut with torque wrench to an initial torque
of 50 ft-lb. Loosen nut from initial torque and finger tighten. Insert new cotter pin through nut and
spindle. If necessary loosen,
never tighten, nut to align slot with the hole in the spindle. Bend one
leg of cotter pin over the end of the spindle and the other leg over the nut. Tap legs slightly to set.
Cotter pin must be tight.
(4) Perform Dial Indicator Test: Attach dial indicator block to the wheel. With both hands, push the
wheel towards the trailer. Set the sensory tip of the dial indicator against the outer edge of the
spindle. Set the dial indicator to zero. Grasp the tire at the top and the bottom and gently pull out.
Check the reading on the dial indicator for the amount of endplay present in the bearing. (0.001” to
0.010”) Readjust the bearing if required.
8.19.
Trailer Components:
Remaining trailer components must be inspected and repaired as needed by a qualified service
mechanic. See the maintenance schedule for in Section 8.20 for required inspection intervals.
8.20. Air Signal Filter: Once a quarter remove and clean the blast pressure signal filter (#68).
8.21.
Water Supply Strainer: Once a week remove and clean the water strainer element (#59).
8.22.
Water Pump: Once a quarter disassemble, clean, and re-lubricate air drive section of the water
pump (#58). Refer to manufacturer manual Section 14.0 for maintenance requirements.