Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 5-33
2250 SERVICE/MAINTENANCE MANUAL HOISTS
5
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 Figure 5-31
and Figure 5-32):
1. Clean load block or the hook-and-weight ball.
2. Lubricate sheaves (if fittings provided), hook trunnion,
hook swivel, and any other part with a grease fitting at
the intervals specified in Section 9.
3. Tighten loose tie-bolts, cap screws, and set screws.
Check that all cotter keys are installed and opened.
4. Check sheaves for uneven wear in the grooves and on
the flanges. Check for loose or wobbly sheaves. These
conditions indicate faulty bearings or bushings.
5. Check the fit of wire rope in the groove of each sheave.
An oversize wire rope can crack the lip of sheave flange
causing rapid wear of wire rope and sheave. The groove
must be larger than wire rope, and the groove must be
free of rough edges and burrs.
6. Check that hook, trunnion, and swivel rotate freely
without excessive play. Faulty operation indicates faulty
bushings or bearings or inadequate lubrication.
7. Check swivel of hook-and-weight ball for the following
conditions:
• Overloading: Spin swivel by hand. If the motion is
rough or has a ratchet-like effect, swivel bearings
are damaged.
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 5-30
)
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
restrictions when load block has duplex or
quadruplex hook.
FIGURE 5-30
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 5-31
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

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English