(3)Connect the brake leads to the terminal block on the brake body.
(4)Install the forward fan mounting retaining ring and install the fan. Install the rear retaining ring. Install the fan shroud and bolts.
(5)Test hoist per Section V, Paragraph
5-11. INSPECTION OF HOIST TRAVERSE DRIVE.
Figure 5-10. Traverse Drive Arrangement.
a)General. The traverse drive consists of four single flange wheels, two on each side of the beam, carried directly by the hoist frame. These wheels rotate on sealed ball bearings supported by fixed pins. Pinions drive two opposing wheels with gear teeth cut into the flange. Both pinions are mounted on a hexagonal drive shaft supported by sealed ball bearings at each hoist side. The pinions are held in place by means of clamp collars. The drive shaft passes through one hoist side and is driven by a single reduction hollow shaft gear reducer.
b)Ensure that the hoist is properly fitted to the beam. The hoist must be centered on the beam with clearance between the sides of the bottom of the beam flange and the inside faces of the wheel flanges. Proper clearance must exist along the entire length of beam that the hoist can traverse. An amount of 3/32 to 1/8 inch clearance per side is recommended for a total of 3/16 to 1/4 inch wider than the beam flange. If too little or too much clearance is determined, adjust trolley per Section II, Paragraph
c)Inspect wheel treads, flanges, and gear teeth for wear. Check for adequate lubrication (WG, Section IV, Paragraph
missing items. Wheels must always be changed in opposing pairs and drive wheels should be changed when the drive pinions are replaced.
CAUTION
Ensure that the cross shaft is properly positioned and locked into place by means of the clamp collars. Failure to do so may allow the drive shaft to contact the rope on the rope drum (B frame) or the hoist gearcase (C frame hoist).
d)Examine the drive pinions, cross shaft, and cross shaft bearings. Check pinions for gear tooth wear and proper alignment with wheel gear. A spacer washer between the cross shaft bearings and the pinion aligns the gear mesh. Clamp collars hold the pinions and spacer washers tight against the bearings. Verify that the clamp collars are tight on the cross shaft. If it is necessary to adjust or reset the clamp collars, verify that the hex shaft surface is free of mechanical damage and oil before tightening the clamp collars. Drive pinions must be replaced as sets and should be replaced along with the drive wheels. The cross shaft bearings are sealed for life and should be replaced at any sign of mechanical wear or lubricant leakage.
e)Inspect the traverse gearbox and motor. Look for signs of rough operation, mechanical damage or lubricant leaks. Inspect the hollow bore and hexagonal drive shaft for wear. Verify that the four bolts that hold the gearbox to the trolley frame and the four bolts that hold traverse motor to the gearbox are all present and tight. Replace and tighten as necessary. The factory recommends complete replacement of the traverse gearbox. However, gearbox service may be available from you local authorized Yale repair center.
5-12. TESTING BLOCK OPERATED LIMIT SWITCH.
a)General. The block operated limit switch is a secondary upper limit switch actuated when the lower block contacts the limit switch weight. The rotary geared limit switch (screw type limit switch) is the primary upper limit switch and must be temporarily disconnected to allow the block operated limit switch to be tested.
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