Usage:
6V7762 Dual Hook Hoist And Accessories
6V7762 Dual Hook Hoist (1) has a lifting capacity of 1800 kg (4000 lb). FT1778 Cart (2) can be made for use with hoist (1). 6V7779 Sling (3), 9S9077 Spacers (4), 9S9076 Spacers (5) and 6V7778 Brackets (6) can be used with hoist (1) to turn over engines. For use with larger engines, 6V7919 Comversion Group can be installed on hoist (1) to increase its capacity to 3600 kg (8000 lb).
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Do not use accessories with weight capacities less than 3600 kg (8000 lb). Personal injury can result. |
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Lubrication, Maintenance And Repair
1 Before operation of the hoist, remove solid plug (1) and install breather plug (2) in its place.
2 Every three months, put grease on rollers (3) and (4) and put 30W gear oil on the load chain.
NOTE: See the Duff-Norton Service Manual for specifications on lubrication and maintenance.
3 For repairs, see the "REPAIR CENTERS" section in the Caterpillar Tool Guide for the nearest Duff-Norton authorized repair center.
6V7919 Conversion Group
1. 3600 kg (8000 lb) Load Block (green)
2. 3600 kg (8000 lb) Load Block (red)
3. Lifting Bracket
4. Socket Head Bolts (8) [9/16"-18 × 70 mm (2.75") long]
5. Load Chain 9144 mm (360")
6. Locking Pin, Bracket and Bolt [1/4"-20 × 22 mm (.875") long]
7. Chain Installation Tool (not shown)
8. "4 TON" Decal (2) (not shown)
Conversion Group Installation
1 Remove six socket head bolts (1) and remove lifting bracket (2). Remove four setscrews (3) and remove all paint from the bosses around the setscrews. Fasten lifting bracket (4) on hoist (5) as shown with eight 9/16"-18 × 70 mm (2.75") long socket head bolts, so that the number "1" stamped in the side of bracket (4) at location (A) is in alignment with the hoist at location (B). Tighten the bolts to a torque of 82 ± 14 N·m (60 ± 10 lb-ft).
2 Remove end covers (6) and (7) from the hoist.
3 Disconnect the electrical power from the hoist. Use a screwdriver to remove metal lock (8) from the slots in red and green travel limiting wheels (9). Turn both wheels until they move to a center position on the threaded shaft. Engage metal lock (8) back in a slot of each of the travel limiting wheels. Remove both load blocks from the chain in the hoist and move the chain through the hoist until five or six links of chain are extended from the case. Make slotted chain link (10), then use the link to connect the short end of the load chain in the hoist to the 9144 mm (360") load chain of the conversion group.
NOTE: Make sure welded joints (C) on the links are out, away from the inside load sheave, when the load chain goes into the hoist.
4 Connect the hoist to electrical power. Depress one of the buttons of power drop (11) to move the 9144 mm (360") load chain into the hoist. When slotted link (10) comes through, remove it and the original chain. Move several additional feet of chain through the hoist. Find the load block that is the same color as the button on power drop (11) that moves the chain into the hoist. With the load block in the position shown, start the chain into the sheave through opening (D). The welded joints on the chain links should be toward the inside of the load sheave. Use opening (E) in the top of the load block for access to turn the sheave while the chain is being put around it.
5 Turn the sheave until the chain end comes through the load block. If the chain does not easily go through the load block, turn the block upside down while turning the sheave. After approximately 1220 mm (48") of chain has been pulled through the load block, use a screwdriver to hold the chain in place as shown. Put the opposite end of the chain through the second load block using the same instructions as given for the first block.
6 Disconnect the electrical power to the hoist; loosen two screws (12) and move plate (13) away from pin (14). Slide pin (14) out of the housing approximately 38 mm (1.5"). As the load block on that side hangs from the hoist, push the end of the chain into the hoist housing with chain installation tool (15). Then slide pin (14) through the end link and install pivot plate (13).
NOTE: Make sure the chain links are not twisted.
7 Push the end of the chain into lifting bracket (4) and fasten it with pin (16). Install retainer (17) over pin (16) with the slot in the retainer toward the pin. Fasten the retainer with two 1/4"-20 × 22 mm (.875") long bolts.
8 Operate hoist (5) to lift the first load block approximately 250 mm (10") from the bottom of the hoist.
9 Disconnect electrical power from the hoist.
10 With a screwdriver, move metal lock (8) from the slots in travel limiting wheels (9). Adjust the first travel limiting wheel against the corresponding limit switch until the switch is activated. This can be tested with a continuity light or a click can be heard as the switch is activated.
11 Connect electrical power back to the hoist and check to see that the first load block stops within approximately 250 mm (10") of the hoist.
12 Follow a similar procedure to adjust the second limiting wheel against the limit switch for the other load block.
13 Put metal lock (8) back in a slot of each travel limiting wheel; connect the electrical power and check the adjustments made.
14 Disconnect the electrical power and install covers (18) and (19). Put a "4 TON" decal (20) on each end of the hoist.
NOTE: Should a conversion ever be made back to a two-ton hoist, be sure to remove the "4 TON" decals and again install the "2 TON" decals.
Engine Rollover
The following instructions can be used for both V-engines and in-line engines.
1 Install two 6V7778 Brackets (1) with the necessary bolts and spacers. Install chains (2) and sling (3) as shown between brackets (1) and the load blocks of the hoist. The sling goes under the engine and is connected to the lower eyes of brackets (1).
2 Lift the engine clear of the engine stand without making any rotation. Turn the engine in the direction of rotation that moves the 6V7778 Brackets from a lower position to a high position with respect to the center of gravity of the engine. With the engine in the vertical position, put it back on the engine stand.