Nexen 8K 845200 - Manual (Page 7)

4 FORM NO. L-20013-K-0210
OPERATION
TROUBLESHOOTING
CAUTION
CAUTION
Never exceed life of facing material. Facing
life depends on the volume of material and
the total energy over the life of the unit.
Expected life (in hrs) can be found by:
Time=
Volume /
(Power • Wear Rate)
WARNING
Ensure proper guarding of the product is
used. Nexen recommends the machine
builder design guarding in compliance
with OSHA 29 CFR 1910 “Occupa-
tional Safety and Health Hazards.”
TABLE 1 Maximum Operating Speeds
Model RPM
8K Brake 2700
12K Brake 1800
WARNING
The temperature limits for this product line
are 4.5º - 104º C (40º-220º F). Never exceed maximum operating speeds
listed for your product (See Table 1).
Jam Nuts Jam Nuts
Fixed Shoe
Friction Facings
Guide Rod
Guide Rod
Retaining Ring
Washer
Guide Rod Spring
Retaining Ring
Washer
Guide Rod
Spring
Sliding Shoe
Base Bar
Top Housing
Bottom Housing
Push Rod
Bushing Push Plate Spring
Push Plate
Diaphragm
Symptom Probable Cause Solution
Failure to Engage
Ruptured Diaphragm Replace the Diaphragm.
Faulty air controls Check the air controls for proper operation.
Failure to Disengage
Faulty or damaged Guide Rod Compres-
sion Springs
Replace the Guide Rod Compression Springs.
Faulty or damaged Push Plate Spring Replace the Push Plate Spring.
Faulty air controls Check the air controls for proper operation.
8K or 12K Diaphragm
Brake Slippage
Foreign material on the Optional Brake
Drum or on the shaft
Clean the Optional Brake Drum or shaft.
Foreign material on the Friction Facings Replace the Friction Facings.
8k or 12K Diaphragm Brake working out-
side its torque and heat dissipating range.
Check the application.