Manitowoc 999, Service And Maintenance Manual

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Reference
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HOISTS 999 SERVICE/MAINTENANCE MANUAL
5-20
Published 05-16-17, Control # 233-03
LOAD BLOCK AND HOOK-AND-WEIGHT
BALL INSPECTION
The operating condition of the load block and the hook-and-
weight ball can change daily with use; therefore, they must
be inspected daily (at start of each shift) and observed during
operation for any defects which could affect their safe
operation. Correct all defects before using the load block or
the hook-and-weight ball.
Daily inspection and maintenance will include the following
points (see Figures
5-18 and 5-19 ):
1. Clean the load block or the hook-and-weight ball.
2. Lubricate the sheaves (if fittings provided), the hook
trunnion, the hook swivel, and any other part equipped
with a grease fitting at the intervals specified in the
“Lubrication Guide.”
3. Tighten loose tie-bolts, cap screws, and set screws.
Check that all cotter keys are installed and opened.
WARNING
Falling Load Hazard
To prevent load from dropping due to structural failure of
load block or hook-and-weight ball:
• Only use a load block or a hook-and-weight ball
which has a capacity equal to or greater than load to
be handled.
• Do not remove or deface nameplate ( Figure 5-17 )
attached to load blocks and hook-and-weight balls.
• See Duplex Hook topic in Section 4 of Operator
Manual for recommended sling angles and capacity
r e s t r i c t i o n s w h e n l o a d b l o c k h a s d u p l e x o r
quadruplex hook.
FIGURE 5-17
1
2
3
4
5
6
Item Description
1 Working Load Limit (ton (US and metric)
2 Wire Rope Diameter (in and mm)
3 Block Weight (lb and kg)
4 Block Serial Number
5 Block Part Number (OEM and Manitowoc)
6 Design Factor
FIGURE 5-18
Item Description Item Description
1 Dead-End Clip 4c Check Gap Here
2 Socket and Wedge 5 Bolt or Pin
3 Bolt or Pin 6 Weight Ball
4 Swivel 7 Bolt or Pin
4a Swivel Shank 8 Hook
4b Swivel Barrel 9 Latch
1
2
3
4
5
7
8
6
9
4b
4a
4c
FIGURE 5-19
Item Description
1 Socket and Wedge
2 Center Plates
3 Tie Bolt
4 Sheaves
5 Sheave Shaft
6 Name Plate
7 Locking Cap
8 Hook Nut
9 Trunnion
10 Thrust Bearing
11 Latch
12 Hook
1
2
3
4
5
8
7
6
10
11