Great Plains NTA3007HD Operator Manual - Manual (Page 125)

Maintenance and Lubrication 121
04/04/2011 166-207M
Brake Drum and Liner Maintenance
Great Plains recommends having brakes serviced by
trained and fully equipped brake technicians.
Non-Asbestos Fibers Hazard:
Most recently manufactured brake linings are asbestos-free.
However, non-asbestos brake linings may contain one or more
of a variety of ingredients, including glass fibers, mineral
wool, aramid fibers, ceramic fibers and silica that can be
health risks if inhaled.
Scientists disagree on the extent of the risks from exposure to
these substances. Exposure to silica dust can cause silicosis, a
non-cancerous lung disease. Silicosis gradually reduces lung
capacity and efficiency and can result in serious breathing dif-
ficulty. Some scientists believe other types of non-asbestos
fibers, when inhaled, can cause similar diseases of the lung.
Silica dust and ceramic fiber dust are known to the State of
California to cause lung cancer. U.S. and international agen-
cies have also determined that dust from mineral wool,
ceramic fibers and silica are potential causes of cancer.
For silica, OSHA has set a maximum allowable level of
exposure of 0.1 mg/m
3
, 8-hour time-weighted average.
Some manufacturers of non-asbestos brake linings rec-
ommend that exposures to other ingredients be kept
below 1.0 f/cc, 8-hour time-weighted average.
Scientists disagree, however, to what extent adherence
to these maximum allowable exposure levels will elimi-
nate the risk of disease that can result from inhaling non-
asbestos dust.
The following procedures for servicing brakes are recom-
mended to reduce exposure to non-asbestos fiber dust,
a cancer and lung disease hazard. A Material Safety
Data Sheet (MSDS) is available from Federal Mogul Fric-
tion Products, U.S. telephone (540) 662-3871. Request
MSDS WNRE-05-155-4.
Use caution to avoid creating, breathing or ingesting dust
when servicing brakes. Check for applicable laws, regu-
lations and insurance/enterprise policies prior to com-
mencing work.
Recommended Work Practices
Separate Work Area - Service brakes in an area where
these precautions are always taken for all work. Wear
clothes used only for brake work.
Respiratory Protection - Wear a respirator equipped
with a high-efficiency (HEPA) filter approved by NIOSH
or MSHA for brake work.
Wear respiratory protection at all times during brake ser-
vicing (including grinding or machining brake drums),
beginning with the removal of the wheels, through shop
cleanup after completion of brake work (including empty-
ing vacuums, changing HEPA filters and rag disposal).
Procedures for Servicing Brakes
• Service the removed brake assembly in a negative
pressure enclosure. The enclosure should be
equipped with a HEPA vacuum and worker arm
sleeves. With the enclosure in place, use the HEPA
vacuum to loosen and vacuum residue from brake
parts.
• Alternatively, use a catch basin with water and a bio-
degradable, non-phosphate, water-based detergent to
wash the brake drum and other brake parts. Apply the
solution with low pressure to prevent dust from becom-
ing airborne. Allow the solution to flow between brake
drum and brake support. Thoroughly wet the wheel
hub and brake assembly components to control dust,
prior to removal of brake shoes. Wipe parts clean with
a cloth.
• If an enclosed vacuum system or brake washing
equipment is not available, carefully clean the brake
parts in open air. Use a fine mist from a pump spray
bottle to wet parts. Use a solution containing water,
and, if available, a biodegradable, non-phosphate,
water-based detergent. Thoroughly wet the wheel hub
and brake assembly components to control dust, prior
to removal of brake shoes. Wipe parts clean with a
cloth.
Dust Control - Use only HEPA-equipped vacuum clean-
ers. Never blow dust with an air gun. Do not dry brush
parts.
Cleaning Fluids - NEVER use carcinogenic solvents,
flammable solvents, or solvents that can damage brake
components as wetting agents.
Work Area -. Clean work areas with a HEPA-equipped
vacuum cleaner or by damp wiping. NEVER use an ordi-
nary shop vac, compressed air or dry sweepers.
When replacing a HEPA filter, wet the used filter with a
fine water mist. Bag and carefully dispose of the used fil-
ter.
Hygiene - Wash hands immediately after brake work,
and before eating, drinking or smoking. Clean clothes
with a HEPA-equipped vacuum before removing them.
Keep food and drink out of the work area.
Shower after work. Do not wear work clothes home. Use
a vacuum equipped with a HEPA filter to vacuum work
clothes after they are worn. Launder them separately.
Waste Disposal - Dispose of discarded linings, used
rags, cloths and HEPA filters with care, such as in sealed
and labeled plastic bags. Consult applicable EPA,
national, regional and local regulations on waste dis-
posal.
Regulatory Guidance - OSHA, NIOSH, MSHA, and
EPA, are regulatory agencies in the United States. These
references are to provide further guidance to employers
and workers employed within the United States. Employ-
ers and workers employed outside of the United States
should consult the regulations that apply to them for fur-
ther guidance.