Maintenance - Bulldog DCH Serie Manual De Instrucciones

2.4 Hoisting Principles
2.4.1 Calculating Head Load
P: Rope tension
η: Pulley coefficient
Θ: Angle
W: Load
μ: Friction factor
Table 6 - Pulley Coefficient
No. of Pullies 1
Roller Bearing
0.98
Sleeve Bearing
0.96
3.1 wire Rope Replacement
1. Feed the end of the wire rope into anchor hole in the drum and make a self-circle on the anchor
pocket. Insert a wedge in the self-circle and tighten the rope for securing purpose.
2. Make sure the first layer of wire rope is tight and maintain a freeboard at least 1.5 x rope diameter.
3. Wire rope shall be wound in an under-wound orientation only.
4. To compensate for uneven spooling and the decrease in line pull capacity as the drum fills up, use as
short a wire rope as practical.
Figure 20 - Wire Rope Replacement
16
CEQUENT
Operation Instructions
2
0.96
0.92

Maintenance

PERFORMANCE PRODUCTS, INC. •
™
Figure 19 - Head Load
Figure 21 - Underwind ONLY
F3839-00 REV C (4782) 08/15