Harrington Hoists and Cranes (G)NTH Trolley - Manual (Page 10)

10
Table 2-3 Bottom Hook Dimension*
Figure 2-3
Cap.
(Tons)
Product
Code
a
(in)
b
(in)
c
(in)
d
(in)
e
(in)
g
(in)
1 NTH010 1.0 0.6 0.9 0.6 1.7 1.1
2 NTH020 1.4 0.9 1.2 0.9 2.0 1.4
3 NTH030 1.8 1.1 1.5 1.1 2.2 1.7
5 NTH050 2.2 1.4 1.9 1.4 2.5 1.8
*Refer to Section 5.7 for inspection dimensions and limits.
2.3 Optional Equipment
2.3.1 Optional Latch Lock Hooks
 The Bullard hook has a conventional hook shape with a special, heavy-duty, rotating, spring-
loaded, locking latch. The latch remains locked until it is released by the operator.
 The Shur-Loc hook is a special design hook where the latch remains fixed and the hook swings
to unlock. The hook cannot be opened while a load is applied.
 Installation of these hooks may change the headroom.
 See Section 9.2, Parts List for a complete Latch Lock Hook part listing.
Figure 2-4 Latch Lock Hooks
2.3.2 Optional Inspection Hook
 The Inspection Hook is designed to facilitate the inspection of the internal surfaces of the hook
yoke and shank portion of the hook itself. The Inspection Hook is suitable for applications where
inspection of the internal parts of the hook set is required. The inspection hook uses the standard
Harrington hook set and is assembled with high-strength locking fasteners instead of rivets.
Inspection hooks are available in top and bottom versions. Refer to Figure 2-5.
 Disassembly and re-assembly involves removal and reinstallation of the yoke fasteners of the
Inspection Hook Set Assembly followed by testing of the hoist prior to returning it to service.
 The Inspection Hook is available only for the NTH010 hoist.
 See Section 9.2, Parts List for a complete Inspection Hook part listing.