3. Mak
e a special tool to remove gib keys that
are not easily accessible:
a) Get a 25 mm wide chisel (1) and grind the
width (2) of the chisel to 16 mm.
b) Grind a slot (3) in each side of the head of
the chisel. The slot keeps the chisel from
slipping.
GUID-AFCFE528-AE29-47A7-9EF2-25EECE9C7921-high.jpg [High]
Fig. 28
4. P
ut the special tool between the gib key
head (1) and the hub (2).
5. Drive against the special tool with a hammer.
6. Use the narrow side (3) of the special tool for
smaller gib keys and the wide side (4) for
large gib keys.
7. After the hub and the gib key loosen, remove
the gib key with a crowbar.
8. Remove the hub.
GUID-9CB7880F-CA66-4FCF-911B-5C7DA0BDDBF2-high.jpg [High]
Fig. 29
1.2.6 Install a gib key
Gib keys are tapered keys with a tang on the thick end. A gib key is both a locking component and a hub
retainer
. The hub must have a tapered key way that fits the gib key. The gib key will lock the hub into
position requiring no other locking component such as a set screw.
Procedure
1. P
ut a thin layer of antiseize or grease on the
shaft (1) to keep the hub (2) and shaft from
sticking together.
2. Install the hub. Make sure the taper in the
hub is in the same direction as the gib key (3)
taper.
3. Align the keyway in the hub with the keyway
in the shaft.
4. Install the gib key.
5. Hold the sheave or sprocket in position on
the shaft.
6. Hit the gib key with a hammer until the gib
key seats.
IMPORTANT:
Do not hit the gib key extremely hard while installing.
GUID-BAF5544B-A991-4914-901F-6F2E0D16C32C-high.jpg [High]
Fig. 30
GUID-84D2EE26-3CFF-4CBD-8942-F37A750E47EE [V3]
1. General
1-20 Large Square B
aler
79037317B
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