Great Plains NTA2007 Operator Manual - Manual (Page 130)

126 NTA607 or NTA2007 Table of Contents Index Great Plains Manufacturing, Inc.
166-372M Table of Contents Index 2012-01-05
Brake Drum and Liner Maintenance
Great Plains recommends having brakes serviced by
trained and fully equipped brake technicians.
Non-Asbestos Fibres 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 fibres, mineral
wool, aramid fibres, ceramic fibres 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
difficulty. Some scientists believe other types of non-asbestos
fibres, when inhaled, can cause similar diseases of the lung.
Silica dust and ceramic fibber dust are known to the State of
California to cause lung cancer. U.S. and international
agencies have also determined that dust from mineral wool,
ceramic fibres and silica are potential causes of cancer.
For silica, U.S. 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
recommend 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
eliminate the risk of disease that can result from inhaling
non-asbestos dust.
The following procedures for servicing brakes are
recommended to reduce exposure to non-asbestos
fibber dust, a cancer and lung disease hazard. A Material
Safety Data Sheet (MSDS) is available from Federal
Mogul Friction 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,
regulations and insurance/enterprise policies prior to
commencing 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 U.S.
NIOSH or U.S. MSHA for brake work.
Wear respiratory protection at all times during brake
servicing (including grinding or machining brake drums),
beginning with the removal of the wheels, through shop
cleanup after completion of brake work (including
emptying 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
biodegradable, non-phosphate, water-based detergent
to wash the brake drum and other brake parts. Apply
the solution with low pressure to prevent dust from
becoming 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
cleaners. 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
ordinary 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
filter.
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 labelled plastic bags. Consult applicable EPA,
national, regional and local regulations on waste
disposal.
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.
Employers and workers employed outside of the United
States should consult the regulations that apply to them
for further guidance.