Form 10590149 Edition 2 September 2005 HOISTS Series 7790-A & 7792-A Operator’s Manual Save These Instructions
Safety Information Operating Precautions To aid the operator’s understanding of proper and safe use of hoists, the publication “OVERHEAD HOISTS”, ANSI B30.16-1981, can be purchased from: • American Standards Institute, Inc. 1430 Broadway New York, New York 10018 • • • • Do not use the hoist described in this manual to lift or transport humans. Never try to lift a load heavier than the rated capacity of the hoist. Operate hoist with caution. Operator should have a good attitude toward safety.
Adjusting Brake • • • • • Properly attach rated load of hoist to load chain hook. Slowly raise load to 6” height above floor by slowly pulling pull chain handle or depressing pendent control. Release pull chain handle or pendent control. If load starts to lower, tighten brake adjustment by turning counter-clockwise until load stops lowering. Do not over tighten brake. If brake it too tight, the lifting and lowering of load will be eratic, not smooth. • • • hoist load chain hook.
Routine Inspection The type of application for a hoist varies so greatly it is impractical to recommend an exact time-table for inspection of the hoist. Where hoist is subjected to continuous operation with capacity loads, it is recommended the unit be inspected twice a week. If the application is less demanding, the unit should be inspected twice a month. In general, the frequency of inspection should be determined by the severity of the application.
Maintenance Dissassembly Head Disassembly To remove head section from housing without disassembling head components, remove head with control rod (59) attached to gear (25). To accomplish this - Remove two screws (96) and housing cap (95). - Drive out roll pin (61) and remove brake block (60). - Drive out roll pin (69) from control arm (68). - Remove six screws (22) and washers (23). - Remove head section and control rod from housing as one unit.
- Assemble motor to housing. - Lubricate and assemble o-rings (35) into counterbore of end plate (38). - Assemble new gasket (31) and head to housing. Brake and Gearing Disassembly - Remove two screws (96) and housing cap (95). - Carefully slide brake spring (94) part way off brake shoes (92) and using brake spring spreader (33541), remove brake spring (94). CAUTION - remove brake spring (94) with due regard for safety as spring is assembled with considerable tension.
Upper Hook Disassembly - Remove nuts (153), washers (152) and bracket (150). - Drive out roll pin (147) - One-Ton Models. Roll pins (155) and (154) - Two-Ton Models. - Remove collar (143) and balls (144) - One-Ton Models. Collar (116), thrust bearing (120) and bearing races (119) - Two-Ton Models. Upper Hook Assembly Position hook on bracket (150). Apply a liberal amount of grease to groove of collar (143) and assemble eleven balls (144) to collar.
186 186 186 187 187 187 188 188 187 189 187 189 190 190 CAUTION: TIGHTEN NUTS 25 TO 30 FT. LBS. TORQUE ONLY.
( 2-TON MODELS) 123 ( 1-TON MODELS) 149 152 *122 ( 2-TON MODELS) *148 ( 1-TON MODELS) 150 153 CAUTION : TIGHTEN NUTS 25 TO 30 FT. LBS. TORQUE ONLY. 151 153 152 ++ ASSEMBLE WITH SPLIT SIDE ONE UP AND ONE DOWN. 144 119 143 + 147 + ASSEMBLE WITH SPLIT SIDE ONE UP OR DOWN.
Parts List Sl. no. 1 2 3 4 * 5 6 * 7 * 8 9 10 11 12 * 13 14 15 * 16 17 * 18 19 * 20 21 22 23 24 25 * 26 27 28 29 30 * 31 * 32 33 34 * 35 10 Description Head Assembly (standard models) includes items 1 thru 21, 24 thru 30, 33 and 34 with adapter (46211) Part no. 46126-2 Sl. no.
Parts List Sl. no. * 74 75 76 77 78 79 * 80 * 81 * 82 * 83 Description Cotter Pin Carrier Bearing Race (4 req'd) Gear (2 req'd) Shaft (2 req'd) Spacer Bearing Bearing Retaining Ring Retaining Ring Gearing Assembly (includes items 70 thru 73 and 75 thru 83) Part no.
Parts List Sl. no. Description 147 Roll Pin * 148 Safety Latch (includes bolt, nut and spring) 149 Hook Steel Hook for standard 1 ton models Bronze Hook for 1500 lb spark-resistant models Part no. Sl. no.
Model Identification Model No. 7790-A9 7790-A11 7790-A13 7790-A15 7792-A9 7792-A11 7792-A13 7792-A15 Upper Mounting Hook Ass’y 43002 None * Hook Ass’y 43002 None * Hook Ass’y 43049 None * Hook Ass’y 43049 None * Type Control Pull Chain Pull Chain Pendent Pendent Pull Chain Pull Chain Pendent Pendent Type Load Chain Link Link Link Link Link Link Link Link Lbs. (Kg.
Notes 14 Form 10590149-Edition 2
Notes Form 10590149-Edition 2 15
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