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(Dwg. MHP3044)
7. On the free end of the load chain, install the chain stop (490) and stop chain

(492) with the stop chain axle (491), lockwashers (154) and nuts (this buffer

activates the bottom switch limit).

8. As a minimum attach the buffer to the 9th link from the load chain end.

System Removal

1. Shut off, bleed down air supply then disconnect and tag air lines.

2. Remove beam rail stops.

3. Support hoist and trolley system with adequate lifting system and remove.

4. Remove capscrews (482) and washers (481) securing chain bucket to central chain

guides (141) and (142). Refer to Dwg. MHP2977. Remove chain bucket assembly.

5. Prior to removing hoist brake, reduction gear or motor assemblies, remove hook

and load chain from hoist.

Hoist Brake and Reduction Gear Removal

Refer to Dwgs. MHP2971 and MHP2972.

1. Remove nuts (115), lockwashers (154) from screw rods (153).

2. Support brake and reduction gear assembly, and carefully pull assembly from

central chain guide (141).

3. Set brake and reduction gear assembly to one side for later disassembly.

4. Remove ‘O’ rings (261) and (262).

Hoist Motor Removal

Refer to Dwgs. MHP2971 and MHP2973.

1. Remove capscrews (406) from motor flange (403).

2. Support motor assembly (400), and carefully pull assembly from central chain

guide (142).

3. Set motor assembly to one side for later disassembly.

Hoist Brake Removal

Refer to Dwg. MHP2972.

1. Remove capscrews (201) from cover (202).

2. Carefully pull brake assembly (199) from brake cover (219).

3. Set brake assembly (199) to one side for later disassembly.

Hoist Reduction Gear Disassembly

Refer to Dwg. MHP2972.

1. Remove retainer ring (214) from pinion shaft (237) and pull out disc hub (211).

2. Remove retainer ring (216) from brake side.

3. Carefully tap on motor end of pinion shaft (237) until it can be removed from

brake cover (219).

4. Remove the ten capscrews (218) and carefully remove brake cover (219).

5. Remove ring gear (225) from reduction gear housing (241) and keys (224).

6. Using the two puller screw holes M8 provided in the planetary gear support (236),

pull planetary support assembly from reduction gear housing (241).

7. To disassemble planetary assembly, remove bearings (221), push out planet axles

(235) and remove planet gears (234), thrust rings (230), spacers (233) and

bearings (229) and (232).

8. Remove ring gear (228).

9. Remove capscrews (242).

10. Separate gear flange (260) and reduction gear housing (241) from ring gear (254).

11. Pull planetary support assembly from sun gear (238).

NOTICE

• If sun gear is difficult to move, gently tap it to loosen.

12. To disassemble planetary assembly, remove bearing (253), drive pins (243)

completely through to the inside of the planetary support (249). Push out planet

axles (244) and remove planet gears (247), thrust rings (245) and bearings (246).

13. Tap pins (243) out of planet axles (244).

14. Remove spacer (252) and retainer rings (240) and (251).

15. Tap sun gear (238) from reduction gear housing (241) and extract bearing (239).

Hoist Brake Disassembly

Refer to Dwg. MHP2972.

1. Remove capscrews (201) from cover (202). Separate brake assembly from brake

cover (219).

2. Remove friction disc housing (208), friction discs (212) and steel discs (213).

3. Remove brake housing (207) and brake springs (203) from cover (202).

4. Tap piston (204) from brake housing (207).

5. Remove ‘O’ rings (205) and (206) from piston (204).

Hoist Motor Disassembly

Refer to Dwg. MHP2973.

1. Remove capscrews (427), muffler brackets (428), reducer fittings (432) and

mufflers (431) from motor housing (429).

2. Remove capscrews (555) and lockwashers (440) from control valve assembles

(450). Remove control valve assemblies (450), tubes (425) and ‘O’ rings (426).

3. Remove capscrews (266) and covers (446) from motor flange (439).

4. Remove capscrews (441) and lockwashers (440) from motor flange (439).

5. Carefully remove the gear motor assembly from motor housing (429).

6. Remove capscrews (406) from inside of motor housing (429).

7. Carefully remove the gear unit by prying motor flange assembly from motor

housing (429).

8. Remove capscrews (421) on front end covers (422).

9. Remove front end covers (422) and motor housings (424) from motor flange

(439).

10. Remove retainer rings (412).

11. Remove assembled oil seal supports (417) from motor housing (429).

12. Remove capscrews (415) and washers (178).

13. Remove bearings (419).

14. Remove nuts (443) and ‘O’ rings (444). Extract motor drive gears (436) and motor

idle gears (435).

15. Remove bearings (442).

16. Remove motor shaft (407) from motor flange (403).

17. Remove external gears (411).

18. Remove retainer ring (409) and bearing (408) from motor shaft (407).

Bottom Hook Disassembly

Refer to Dwg. MHP2975.

1. Remove capscrews (133), lockwashers (119), locking plate (263) and axle (374)

from hook block (380).

2. Remove nuts (115) and lockwashers (154) from threaded rods (375).

3. Carefully pry hook block halves (380) and (381) apart.

4. Remove sprocket (376) with bearings (149) and seal rings (150).

5. Remove hook (382) or clevis (385), thrust bearing (378) and split ring (377).

6. Remove bearings (149) and seal rings (150) from sprockets only if they require

replacement or cleaning.

Hoist Suspension Disassembly

Refer to Dwgs. MHP2970 and MHP2971.

1. Remove load chain, limit switch assemblies (168), hoist brake and reduction

assembly and motor assembly.

2. Remove capscrews (106), lockwashers (105) and caps (113) from shafts (139).

3. Tap out shafts (139) and remove suspension assembly and spacers (137) from

trolley assemblies.

4. Remove nuts (115) and lockwashers (154) from screw rods (153).

5. Pry reduction gear flange (260) from central chain guide (141).

6. Remove capscrews (106), lockwashers (105) and caps (156) from the central chain

guide (141).

7. Remove central chain guide (141), chain guide (143) and chain guide stop (146).

8. Remove sprocket (157) with bearings (158) and (161).

9. Remove screw rods (153).

10. Remove chain guide housing (151), chain guide (144) and sprocket (152) with

bearings (149).

Trolley Disassembly

Refer to Dwg. MHP2970.

1. Remove capscrew (133), lockwasher (119), washer (135) and drive gear (136)

from trolley drive assembly.

2. Remove trolley drive assembly from side plates (102) and (103).

3. Remove capscrews (106), lockwashers (105) and suspension shaft caps (123) from

side plates (102) and (103).

4. Remove nuts (115) from screw rods (116). Remove screw rods (116).

5. Remove side plates (102) and (103) from supports (111).

6. Remove remaining capscrews (106), lockwashers (105) and suspension shaft caps

(123) from outside of side plates (101) and (104).

7. Note position and quantity of spacers then remove spacers (137).

8. Remove side plates (101) and (104) from supports (111).

9. Remove capscrews (114), lockwashers (105) and caps (113) from trolley axle

(107).

Form MHD56416 Edition 1

Содержание LCA750T

Страница 1: ...Product Maintenance Information Air Chain Hoist Model LCA750T Dwg MHP2986 Save These Instructions Form MHD56416 Edition 2 May 2009 45887577 2009 Ingersoll Rand Company ...

Страница 2: ...ace if necessary Observe the action of load chain feeding through hoist Do not operate a hoist unless load chain feeds through hoist and hook block smoothly and without audible clicking or other evidence of binding or malfunctioning 5 Motor If performance is poor disassemble motor and check for wear or damage to bearings and shafts Parts should be cleaned lubricated and reassembled Replace worn or...

Страница 3: ...l Rand trained service technician Standard Components 1 year or 1 000 hrs 2 years or 2 000 hrs 3 years or 3 000 hrs 4 years or 4 000 hrs 5 years or 5 000 hrs 6 years or 6 000 hrs 8 years or 8 000 hrs Inspect Motor X X X X Inspect Disc Brake X X X Inspect Gearbox X X X Inspect Controls X X X X Inspect System Housings and Main Frames X X X X Inspect Trolley Motor X X X Inspect Trolley Wheel Assembly...

Страница 4: ... NOTES Pass Fail Repair Replace Fasteners Gears Shafts Bearings Load Bearing Sheave Chain Guides Springs Covers Housings Hooks Bottom Actual Hook Throat Width ________ inches ________ mm Refer to Table 3 for minimum maximum acceptable widths Hook Twist maximum 10 Hook Crack Test Method Used Dye Penetrant ________ Magnetic Particle ________ Other ________ Hook Latch Brake 100 Load Test Brake Visual...

Страница 5: ...trolley spacing Refer to the manufacturer s literature Air powered trolley does not operate Pendant lever sticking Check lever and restore free movement No air supply to trolley or too little CFM or psi cu m min or bar Check psi bar at trolley inlet Refer to manufacturer s specifications MAINTENANCE WARNING Never perform maintenance on the hoist while it is supporting a load Before performing main...

Страница 6: ... should be used when assembling the hoist 6 When grasping a part in a vise always use leather covered or copper covered vise jaws to protect the surface of the part and help prevent distortion This is particularly true of threaded members machined surfaces and housings 7 Do not remove any part which is a press fit in or on a subassembly unless the removal of that part is necessary for repairs or r...

Страница 7: ...and brake springs 203 from cover 202 4 Tap piston 204 from brake housing 207 5 Remove O rings 205 and 206 from piston 204 n Hoist Motor Disassembly Refer to Dwg MHP2973 1 Remove capscrews 427 muffler brackets 428 reducer fittings 432 and mufflers 431 from motor housing 429 2 Remove capscrews 555 and lockwashers 440 from control valve assembles 450 Remove control valve assemblies 450 tubes 425 and ...

Страница 8: ...epair Use the following procedures to clean inspect and repair the components of the hoist and trolley system n Cleaning CAUTION Bearings that are loose worn or rotate in the housing must be replaced Failure to observe this precaution will result in additional component damage n Inspection All disassembled parts should be inspected to determine their fitness for continued use Pay particular attent...

Страница 9: ...nstall spacer 129 followed by seal ring 128 on the outside of bearings Install retainer ring 125 to secure parts 4 Press wheel assemblies onto side plate axles 5 Secure trolley wheels on side plate axles with spacers 127 and retainer rings 126 Trolley 1 Ensure bushings 110 are installed in support 111 and trolley axle 107 2 Install sleeves 109 on trolley axle 107 3 Install supports 111 on trolley ...

Страница 10: ...ke and Reduction Gear Installation Refer to Dwgs MHP2971 and MHP2972 1 Lubricate and install O rings 261 and 262 2 Carefully support brake and reduction gear assembly and locate on screw rods 153 3 Secure brake and reduction gear assembly with lockwashers 154 and nuts 115 Refer to TORQUE CHART on page 12 for torque requirements n System Installation 1 Install hook and load chain on hoist 2 Connect...

Страница 11: ...t Information Manual for applicable maximum system load capacity Conduct a load test to 125 of the rated system capacity Testing to more than 125 may be necessary to comply with standards and regulations set forth in areas outside of the USA Form MHD56416 Edition 1 11 ...

Страница 12: ... 10 9 Dry Lubricated PTFE Dry Lubricated PTFE M6x1 9 10 6 7 4 11 12 8 9 5 6 M8x1 25 21 23 16 18 9 11 26 30 20 22 12 13 M10x1 5 41 47 31 35 19 21 53 60 39 45 24 27 M12x1 75 71 81 54 61 32 36 91 103 68 77 41 46 M14x2 115 130 86 98 52 59 147 166 110 125 66 75 M16x2 165 187 124 140 74 84 227 257 170 193 102 116 M20x2 5 321 364 241 273 144 164 443 502 332 376 199 226 M22x2 5 439 497 329 373 197 224 605...

Страница 13: ...SERVICE NOTES Form MHD56416 Edition 1 13 ...

Страница 14: ...SERVICE NOTES 14 Form MHD56416 Edition 1 ...

Страница 15: ...SERVICE NOTES Form MHD56416 Edition 1 15 ...

Страница 16: ...www irtools com ...

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